System.Data.SQLite
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Overview
Comment:Update SQLite core library to the latest trunk code. Bump all versions to 1.0.89.0. Update version history docs.
Downloads: Tarball | ZIP archive | SQL archive
Timelines: family | ancestors | descendants | both | trunk
Files: files | file ages | folders
SHA1: 92f420b32c2046e1210c2be3e377bd6e836ea7f3
User & Date: mistachkin 2013-08-23 06:22:33
Context
2013-08-27
00:52
Add MS KB article link about the Visual C++ Runtime Library downloads to the download page. check-in: 3824d3fd20 user: mistachkin tags: trunk
2013-08-23
06:22
Update SQLite core library to the latest trunk code. Bump all versions to 1.0.89.0. Update version history docs. check-in: 92f420b32c user: mistachkin tags: trunk
2013-08-21
04:39
Minor correction to the fn_UnquoteVariable batch tool sub-routine. check-in: b81aec8b26 user: mistachkin tags: trunk
Changes
Hide Diffs Unified Diffs Ignore Whitespace Patch

Changes to Doc/Extra/dbfactorysupport.html.

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<configuration>
  <system.data>
    <DbProviderFactories>
      <remove invariant="System.Data.SQLite"/>
      <add name="SQLite Data Provider" invariant="System.Data.SQLite" 
           description=".Net Framework Data Provider for SQLite"
           type="System.Data.SQLite.SQLiteFactory, System.Data.SQLite,
                 Version=1.0.88.0, Culture=neutral,
                 PublicKeyToken=db937bc2d44ff139"/>
    </DbProviderFactories>
  </system.data>
</configuration>
</pre>
      </div>
      <p>







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&lt;configuration&gt;
  &lt;system.data&gt;
    &lt;DbProviderFactories&gt;
      &lt;remove invariant="System.Data.SQLite"/&gt;
      &lt;add name="SQLite Data Provider" invariant="System.Data.SQLite" 
           description=".Net Framework Data Provider for SQLite"
           type="System.Data.SQLite.SQLiteFactory, System.Data.SQLite,
                 Version=1.0.89.0, Culture=neutral,
                 PublicKeyToken=db937bc2d44ff139"/&gt;
    &lt;/DbProviderFactories&gt;
  &lt;/system.data&gt;
&lt;/configuration&gt;
</pre>
      </div>
      <p>

Changes to Doc/Extra/version.html.

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          </td>
        </tr>
      </table>
    </div>
    <div id="mainSection">
    <div id="mainBody">
    <h1 class="heading">Version History</h1>




    <p><b>1.0.88.0 - August 7, 2013</b></p>
    <ul>
      <li>Various fixes to managed virtual table integration infrastructure.</li>
      <li>Implement workaround for an incorrect PROCESSOR_ARCHITECTURE being reported. Fix for <a href="http://system.data.sqlite.org/index.html/info/9ac9862611">[9ac9862611]</a>.</li>
      <li>Modify classes that implement the IDisposable pattern to set the disposed flag after their base classes have been disposed.</li>
      <li>When automatically registering custom functions, use the executing assembly (i.e. System.Data.SQLite) for reference detection. Fix for <a href="http://system.data.sqlite.org/index.html/info/4e49a58c4c">[4e49a58c4c]</a>.</li>
    </ul>







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          </td>
        </tr>
      </table>
    </div>
    <div id="mainSection">
    <div id="mainBody">
    <h1 class="heading">Version History</h1>
    <p><b>1.0.89.0 - September XX, 2013 <font color="red">(release scheduled)</font></b></p>
    <ul>
      <li>Updated to <a href="http://www.sqlite.org/src/info/trunk">SQLite 3.8.0</a>.</li>
    </ul>
    <p><b>1.0.88.0 - August 7, 2013</b></p>
    <ul>
      <li>Various fixes to managed virtual table integration infrastructure.</li>
      <li>Implement workaround for an incorrect PROCESSOR_ARCHITECTURE being reported. Fix for <a href="http://system.data.sqlite.org/index.html/info/9ac9862611">[9ac9862611]</a>.</li>
      <li>Modify classes that implement the IDisposable pattern to set the disposed flag after their base classes have been disposed.</li>
      <li>When automatically registering custom functions, use the executing assembly (i.e. System.Data.SQLite) for reference detection. Fix for <a href="http://system.data.sqlite.org/index.html/info/4e49a58c4c">[4e49a58c4c]</a>.</li>
    </ul>

Changes to Doc/Extra/welcome.html.

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        <font color="red">
          Itanium processor support not currently included.
        </font>
      </p>
      <h1 class="heading">Distributing the Binaries (Compact Framework)</h1>
      <p>Both the <b>System.Data.SQLite.DLL </b>and <b>SQLite.Interop.XXX.DLL</b> files
        must be deployed on the Compact Framework.&nbsp; The XXX is the build number of
        the System.Data.SQLite library (e.g. &quot;088&quot;).&nbsp; The
        <b>SQLite.Interop.XXX.DLL</b> file is a fully native assembly compiled for
        the ARM processor, and System.Data.SQLite is the fully-managed Compact
        Framework assembly.</p>
      <hr />
      <div id="footer">
        <p>
          <a href="mailto:sqlite-users@sqlite.org?subject=SQLite.NET%20Class%20Library%20Documentation%20Feedback:%20Welcome">
          Send comments on this topic.<!--[if gte IE 5]><tool:tip element="seeAlsoToolTip" avoidmouse="false" /><tool:tip element="languageFilterToolTip" avoidmouse="false" /><![endif]-->    </div>
    </div>
  </body>
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        <font color="red">
          Itanium processor support not currently included.
        </font>
      </p>
      <h1 class="heading">Distributing the Binaries (Compact Framework)</h1>
      <p>Both the <b>System.Data.SQLite.DLL </b>and <b>SQLite.Interop.XXX.DLL</b> files
        must be deployed on the Compact Framework.&nbsp; The XXX is the build number of
        the System.Data.SQLite library (e.g. &quot;089&quot;).&nbsp; The
        <b>SQLite.Interop.XXX.DLL</b> file is a fully native assembly compiled for
        the ARM processor, and System.Data.SQLite is the fully-managed Compact
        Framework assembly.</p>
      <hr />
      <div id="footer">
        <p>
          <a href="mailto:sqlite-users@sqlite.org?subject=SQLite.NET%20Class%20Library%20Documentation%20Feedback:%20Welcome">
          Send comments on this topic.<!--[if gte IE 5]><tool:tip element="seeAlsoToolTip" avoidmouse="false" /><tool:tip element="languageFilterToolTip" avoidmouse="false" /><![endif]-->    </div>
    </div>
  </body>
</html>

Changes to SQLite.Beta.nuspec.

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 * Released to the public domain, use at your own risk!
 *
-->
<package>
  <metadata>
    <id>System.Data.SQLite.Beta</id>
    <title>System.Data.SQLite (x86/x64) Beta</title>
    <version>1.0.88.0</version>
    <authors>SQLite Development Team</authors>
    <description>The official SQLite database engine for both x86 and x64 along with the ADO.NET provider.</description>
    <language>en-US</language>
    <projectUrl>http://system.data.sqlite.org/</projectUrl>
    <iconUrl>http://system.data.sqlite.org/images/sqlite32.png</iconUrl>
    <licenseUrl>http://www.sqlite.org/copyright.html</licenseUrl>
    <tags>sqlite database ado.net provider interop</tags>







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 * Released to the public domain, use at your own risk!
 *
-->
<package>
  <metadata>
    <id>System.Data.SQLite.Beta</id>
    <title>System.Data.SQLite (x86/x64) Beta</title>
    <version>1.0.89.0</version>
    <authors>SQLite Development Team</authors>
    <description>The official SQLite database engine for both x86 and x64 along with the ADO.NET provider.</description>
    <language>en-US</language>
    <projectUrl>http://system.data.sqlite.org/</projectUrl>
    <iconUrl>http://system.data.sqlite.org/images/sqlite32.png</iconUrl>
    <licenseUrl>http://www.sqlite.org/copyright.html</licenseUrl>
    <tags>sqlite database ado.net provider interop</tags>

Changes to SQLite.Designer/AssemblyInfo.cs.

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//      Major Version
//      Minor Version 
//      Build Number
//      Revision
//
// You can specify all the values or you can default the Revision and Build Numbers 
// by using the '*' as shown below:
[assembly: AssemblyVersion("1.0.88.0")]
[assembly: AssemblyFileVersion("1.0.88.0")]







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//      Major Version
//      Minor Version 
//      Build Number
//      Revision
//
// You can specify all the values or you can default the Revision and Build Numbers 
// by using the '*' as shown below:
[assembly: AssemblyVersion("1.0.89.0")]
[assembly: AssemblyFileVersion("1.0.89.0")]

Changes to SQLite.Designer/source.extension.vsixmanifest.

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<?xml version="1.0" encoding="utf-8"?>
<Vsix Version="1.0.0" xmlns="http://schemas.microsoft.com/developer/vsx-schema/2010">
  <Identifier Id="67b5f3a9-cde1-430f-a12b-af95bb064851">
    <Name>System.Data.SQLite Designer</Name>
    <Author>http://system.data.sqlite.org/</Author>
    <Version>1.0.88.0</Version>
    <Description>ADO.NET Data Designer for SQLite</Description>
    <Locale>1033</Locale>
    <InstalledByMsi>false</InstalledByMsi>
    <SupportedProducts>
      <VisualStudio Version="10.0">
        <Edition>Pro</Edition>
      </VisualStudio>





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<?xml version="1.0" encoding="utf-8"?>
<Vsix Version="1.0.0" xmlns="http://schemas.microsoft.com/developer/vsx-schema/2010">
  <Identifier Id="67b5f3a9-cde1-430f-a12b-af95bb064851">
    <Name>System.Data.SQLite Designer</Name>
    <Author>http://system.data.sqlite.org/</Author>
    <Version>1.0.89.0</Version>
    <Description>ADO.NET Data Designer for SQLite</Description>
    <Locale>1033</Locale>
    <InstalledByMsi>false</InstalledByMsi>
    <SupportedProducts>
      <VisualStudio Version="10.0">
        <Edition>Pro</Edition>
      </VisualStudio>

Changes to SQLite.Interop/props/SQLite.Interop.2005.vsprops.

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	<UserMacro
		Name="ConfigurationYear"
		Value="2005"
		PerformEnvironmentSet="true"
	/>
	<UserMacro
		Name="INTEROP_BUILD_NUMBER"
		Value="088"
		PerformEnvironmentSet="true"
	/>
	<UserMacro
		Name="INTEROP_LINKER_VERSION"
		Value="1.0"
		PerformEnvironmentSet="true"
	/>
	<UserMacro
		Name="INTEROP_MANIFEST_VERSION"
		Value="1.0.88.0"
		PerformEnvironmentSet="true"
	/>
	<UserMacro
		Name="INTEROP_RC_VERSION"
		Value="1,0,88,0"
		PerformEnvironmentSet="true"
	/>
	<UserMacro
		Name="INTEROP_INCLUDE_DIRECTORIES"
		Value="src\core"
		PerformEnvironmentSet="true"
	/>







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	<UserMacro
		Name="ConfigurationYear"
		Value="2005"
		PerformEnvironmentSet="true"
	/>
	<UserMacro
		Name="INTEROP_BUILD_NUMBER"
		Value="089"
		PerformEnvironmentSet="true"
	/>
	<UserMacro
		Name="INTEROP_LINKER_VERSION"
		Value="1.0"
		PerformEnvironmentSet="true"
	/>
	<UserMacro
		Name="INTEROP_MANIFEST_VERSION"
		Value="1.0.89.0"
		PerformEnvironmentSet="true"
	/>
	<UserMacro
		Name="INTEROP_RC_VERSION"
		Value="1,0,89,0"
		PerformEnvironmentSet="true"
	/>
	<UserMacro
		Name="INTEROP_INCLUDE_DIRECTORIES"
		Value="src\core"
		PerformEnvironmentSet="true"
	/>

Changes to SQLite.Interop/props/SQLite.Interop.2008.vsprops.

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	<UserMacro
		Name="ConfigurationYear"
		Value="2008"
		PerformEnvironmentSet="true"
	/>
	<UserMacro
		Name="INTEROP_BUILD_NUMBER"
		Value="088"
		PerformEnvironmentSet="true"
	/>
	<UserMacro
		Name="INTEROP_LINKER_VERSION"
		Value="1.0"
		PerformEnvironmentSet="true"
	/>
	<UserMacro
		Name="INTEROP_MANIFEST_VERSION"
		Value="1.0.88.0"
		PerformEnvironmentSet="true"
	/>
	<UserMacro
		Name="INTEROP_RC_VERSION"
		Value="1,0,88,0"
		PerformEnvironmentSet="true"
	/>
	<UserMacro
		Name="INTEROP_INCLUDE_DIRECTORIES"
		Value="src\core"
		PerformEnvironmentSet="true"
	/>







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	<UserMacro
		Name="ConfigurationYear"
		Value="2008"
		PerformEnvironmentSet="true"
	/>
	<UserMacro
		Name="INTEROP_BUILD_NUMBER"
		Value="089"
		PerformEnvironmentSet="true"
	/>
	<UserMacro
		Name="INTEROP_LINKER_VERSION"
		Value="1.0"
		PerformEnvironmentSet="true"
	/>
	<UserMacro
		Name="INTEROP_MANIFEST_VERSION"
		Value="1.0.89.0"
		PerformEnvironmentSet="true"
	/>
	<UserMacro
		Name="INTEROP_RC_VERSION"
		Value="1,0,89,0"
		PerformEnvironmentSet="true"
	/>
	<UserMacro
		Name="INTEROP_INCLUDE_DIRECTORIES"
		Value="src\core"
		PerformEnvironmentSet="true"
	/>

Changes to SQLite.Interop/props/SQLite.Interop.2010.props.

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 * Written by Joe Mistachkin.
 * Released to the public domain, use at your own risk!
 *
-->
<Project DefaultTargets="Build" xmlns="http://schemas.microsoft.com/developer/msbuild/2003" ToolsVersion="4.0">
  <PropertyGroup Label="UserMacros">
    <ConfigurationYear>2010</ConfigurationYear>
    <INTEROP_BUILD_NUMBER>088</INTEROP_BUILD_NUMBER>
    <INTEROP_LINKER_VERSION>1.0</INTEROP_LINKER_VERSION>
    <INTEROP_MANIFEST_VERSION>1.0.88.0</INTEROP_MANIFEST_VERSION>
    <INTEROP_RC_VERSION>1,0,88,0</INTEROP_RC_VERSION>
    <INTEROP_INCLUDE_DIRECTORIES>src\core</INTEROP_INCLUDE_DIRECTORIES>
    <INTEROP_LIBRARY_DIRECTORIES></INTEROP_LIBRARY_DIRECTORIES>
    <INTEROP_LIBRARY_DEPENDENCIES></INTEROP_LIBRARY_DEPENDENCIES>
    <INTEROP_DEBUG_DEFINES>INTEROP_DEBUG=0x31F;INTEROP_LOG=1;INTEROP_TEST_EXTENSION=1</INTEROP_DEBUG_DEFINES>
    <INTEROP_EXTRA_DEFINES>INTEROP_EXTENSION_FUNCTIONS=1;INTEROP_CODEC=1;INTEROP_VIRTUAL_TABLE=1</INTEROP_EXTRA_DEFINES>
    <INTEROP_ASSEMBLY_RESOURCES>/ASSEMBLYRESOURCE:..\System.Data.SQLite\SQLiteCommand.bmp,System.Data.SQLite.SQLiteCommand.bmp /ASSEMBLYRESOURCE:..\System.Data.SQLite\SQLiteConnection.bmp,System.Data.SQLite.SQLiteConnection.bmp /ASSEMBLYRESOURCE:..\System.Data.SQLite\SQLiteDataAdapter.bmp,System.Data.SQLite.SQLiteDataAdapter.bmp</INTEROP_ASSEMBLY_RESOURCES>
    <INTEROP_KEY_FILE>$(ProjectDir)..\System.Data.SQLite\System.Data.SQLite.snk</INTEROP_KEY_FILE>







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 * Written by Joe Mistachkin.
 * Released to the public domain, use at your own risk!
 *
-->
<Project DefaultTargets="Build" xmlns="http://schemas.microsoft.com/developer/msbuild/2003" ToolsVersion="4.0">
  <PropertyGroup Label="UserMacros">
    <ConfigurationYear>2010</ConfigurationYear>
    <INTEROP_BUILD_NUMBER>089</INTEROP_BUILD_NUMBER>
    <INTEROP_LINKER_VERSION>1.0</INTEROP_LINKER_VERSION>
    <INTEROP_MANIFEST_VERSION>1.0.89.0</INTEROP_MANIFEST_VERSION>
    <INTEROP_RC_VERSION>1,0,89,0</INTEROP_RC_VERSION>
    <INTEROP_INCLUDE_DIRECTORIES>src\core</INTEROP_INCLUDE_DIRECTORIES>
    <INTEROP_LIBRARY_DIRECTORIES></INTEROP_LIBRARY_DIRECTORIES>
    <INTEROP_LIBRARY_DEPENDENCIES></INTEROP_LIBRARY_DEPENDENCIES>
    <INTEROP_DEBUG_DEFINES>INTEROP_DEBUG=0x31F;INTEROP_LOG=1;INTEROP_TEST_EXTENSION=1</INTEROP_DEBUG_DEFINES>
    <INTEROP_EXTRA_DEFINES>INTEROP_EXTENSION_FUNCTIONS=1;INTEROP_CODEC=1;INTEROP_VIRTUAL_TABLE=1</INTEROP_EXTRA_DEFINES>
    <INTEROP_ASSEMBLY_RESOURCES>/ASSEMBLYRESOURCE:..\System.Data.SQLite\SQLiteCommand.bmp,System.Data.SQLite.SQLiteCommand.bmp /ASSEMBLYRESOURCE:..\System.Data.SQLite\SQLiteConnection.bmp,System.Data.SQLite.SQLiteConnection.bmp /ASSEMBLYRESOURCE:..\System.Data.SQLite\SQLiteDataAdapter.bmp,System.Data.SQLite.SQLiteDataAdapter.bmp</INTEROP_ASSEMBLY_RESOURCES>
    <INTEROP_KEY_FILE>$(ProjectDir)..\System.Data.SQLite\System.Data.SQLite.snk</INTEROP_KEY_FILE>

Changes to SQLite.Interop/props/SQLite.Interop.2012.props.

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 * Written by Joe Mistachkin.
 * Released to the public domain, use at your own risk!
 *
-->
<Project DefaultTargets="Build" xmlns="http://schemas.microsoft.com/developer/msbuild/2003" ToolsVersion="4.0">
  <PropertyGroup Label="UserMacros">
    <ConfigurationYear>2012</ConfigurationYear>
    <INTEROP_BUILD_NUMBER>088</INTEROP_BUILD_NUMBER>
    <INTEROP_LINKER_VERSION>1.0</INTEROP_LINKER_VERSION>
    <INTEROP_MANIFEST_VERSION>1.0.88.0</INTEROP_MANIFEST_VERSION>
    <INTEROP_RC_VERSION>1,0,88,0</INTEROP_RC_VERSION>
    <INTEROP_INCLUDE_DIRECTORIES>src\core</INTEROP_INCLUDE_DIRECTORIES>
    <INTEROP_LIBRARY_DIRECTORIES></INTEROP_LIBRARY_DIRECTORIES>
    <INTEROP_LIBRARY_DEPENDENCIES></INTEROP_LIBRARY_DEPENDENCIES>
    <INTEROP_DEBUG_DEFINES>INTEROP_DEBUG=0x31F;INTEROP_LOG=1;INTEROP_TEST_EXTENSION=1</INTEROP_DEBUG_DEFINES>
    <INTEROP_EXTRA_DEFINES>INTEROP_EXTENSION_FUNCTIONS=1;INTEROP_CODEC=1;INTEROP_VIRTUAL_TABLE=1</INTEROP_EXTRA_DEFINES>
    <INTEROP_ASSEMBLY_RESOURCES>/ASSEMBLYRESOURCE:..\System.Data.SQLite\SQLiteCommand.bmp,System.Data.SQLite.SQLiteCommand.bmp /ASSEMBLYRESOURCE:..\System.Data.SQLite\SQLiteConnection.bmp,System.Data.SQLite.SQLiteConnection.bmp /ASSEMBLYRESOURCE:..\System.Data.SQLite\SQLiteDataAdapter.bmp,System.Data.SQLite.SQLiteDataAdapter.bmp</INTEROP_ASSEMBLY_RESOURCES>
    <INTEROP_KEY_FILE>$(ProjectDir)..\System.Data.SQLite\System.Data.SQLite.snk</INTEROP_KEY_FILE>







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 * Written by Joe Mistachkin.
 * Released to the public domain, use at your own risk!
 *
-->
<Project DefaultTargets="Build" xmlns="http://schemas.microsoft.com/developer/msbuild/2003" ToolsVersion="4.0">
  <PropertyGroup Label="UserMacros">
    <ConfigurationYear>2012</ConfigurationYear>
    <INTEROP_BUILD_NUMBER>089</INTEROP_BUILD_NUMBER>
    <INTEROP_LINKER_VERSION>1.0</INTEROP_LINKER_VERSION>
    <INTEROP_MANIFEST_VERSION>1.0.89.0</INTEROP_MANIFEST_VERSION>
    <INTEROP_RC_VERSION>1,0,89,0</INTEROP_RC_VERSION>
    <INTEROP_INCLUDE_DIRECTORIES>src\core</INTEROP_INCLUDE_DIRECTORIES>
    <INTEROP_LIBRARY_DIRECTORIES></INTEROP_LIBRARY_DIRECTORIES>
    <INTEROP_LIBRARY_DEPENDENCIES></INTEROP_LIBRARY_DEPENDENCIES>
    <INTEROP_DEBUG_DEFINES>INTEROP_DEBUG=0x31F;INTEROP_LOG=1;INTEROP_TEST_EXTENSION=1</INTEROP_DEBUG_DEFINES>
    <INTEROP_EXTRA_DEFINES>INTEROP_EXTENSION_FUNCTIONS=1;INTEROP_CODEC=1;INTEROP_VIRTUAL_TABLE=1</INTEROP_EXTRA_DEFINES>
    <INTEROP_ASSEMBLY_RESOURCES>/ASSEMBLYRESOURCE:..\System.Data.SQLite\SQLiteCommand.bmp,System.Data.SQLite.SQLiteCommand.bmp /ASSEMBLYRESOURCE:..\System.Data.SQLite\SQLiteConnection.bmp,System.Data.SQLite.SQLiteConnection.bmp /ASSEMBLYRESOURCE:..\System.Data.SQLite\SQLiteDataAdapter.bmp,System.Data.SQLite.SQLiteDataAdapter.bmp</INTEROP_ASSEMBLY_RESOURCES>
    <INTEROP_KEY_FILE>$(ProjectDir)..\System.Data.SQLite\System.Data.SQLite.snk</INTEROP_KEY_FILE>

Changes to SQLite.Interop/props/sqlite3.props.

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 *
 * Written by Joe Mistachkin.
 * Released to the public domain, use at your own risk!
 *
-->
<Project DefaultTargets="Build" xmlns="http://schemas.microsoft.com/developer/msbuild/2003" ToolsVersion="4.0">
  <PropertyGroup Label="UserMacros">
    <SQLITE_MANIFEST_VERSION>3.7.17</SQLITE_MANIFEST_VERSION>
    <SQLITE_RC_VERSION>3,7,17</SQLITE_RC_VERSION>
    <SQLITE_COMMON_DEFINES>_CRT_SECURE_NO_DEPRECATE;_CRT_SECURE_NO_WARNINGS;_CRT_NONSTDC_NO_DEPRECATE;_CRT_NONSTDC_NO_WARNINGS;SQLITE_THREADSAFE=1;SQLITE_USE_URI=1;SQLITE_ENABLE_COLUMN_METADATA=1;SQLITE_ENABLE_STAT3=1;SQLITE_ENABLE_FTS3=1;SQLITE_ENABLE_LOAD_EXTENSION=1;SQLITE_ENABLE_RTREE=1;SQLITE_SOUNDEX=1</SQLITE_COMMON_DEFINES>
    <SQLITE_EXTRA_DEFINES>SQLITE_HAS_CODEC=1</SQLITE_EXTRA_DEFINES>
    <SQLITE_WINCE_DEFINES>SQLITE_OMIT_WAL=1</SQLITE_WINCE_DEFINES>
    <SQLITE_DEBUG_DEFINES>SQLITE_DEBUG=1;SQLITE_MEMDEBUG=1;SQLITE_ENABLE_EXPENSIVE_ASSERT=1</SQLITE_DEBUG_DEFINES>
    <SQLITE_RELEASE_DEFINES>SQLITE_WIN32_MALLOC=1</SQLITE_RELEASE_DEFINES>
    <SQLITE_DISABLE_WARNINGS>4055;4100;4127;4146;4210;4232;4244;4245;4267;4306;4389;4701;4703;4706</SQLITE_DISABLE_WARNINGS>
    <SQLITE_DISABLE_X64_WARNINGS></SQLITE_DISABLE_X64_WARNINGS>







|
|







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 *
 * Written by Joe Mistachkin.
 * Released to the public domain, use at your own risk!
 *
-->
<Project DefaultTargets="Build" xmlns="http://schemas.microsoft.com/developer/msbuild/2003" ToolsVersion="4.0">
  <PropertyGroup Label="UserMacros">
    <SQLITE_MANIFEST_VERSION>3.8.0</SQLITE_MANIFEST_VERSION>
    <SQLITE_RC_VERSION>3,8,0</SQLITE_RC_VERSION>
    <SQLITE_COMMON_DEFINES>_CRT_SECURE_NO_DEPRECATE;_CRT_SECURE_NO_WARNINGS;_CRT_NONSTDC_NO_DEPRECATE;_CRT_NONSTDC_NO_WARNINGS;SQLITE_THREADSAFE=1;SQLITE_USE_URI=1;SQLITE_ENABLE_COLUMN_METADATA=1;SQLITE_ENABLE_STAT3=1;SQLITE_ENABLE_FTS3=1;SQLITE_ENABLE_LOAD_EXTENSION=1;SQLITE_ENABLE_RTREE=1;SQLITE_SOUNDEX=1</SQLITE_COMMON_DEFINES>
    <SQLITE_EXTRA_DEFINES>SQLITE_HAS_CODEC=1</SQLITE_EXTRA_DEFINES>
    <SQLITE_WINCE_DEFINES>SQLITE_OMIT_WAL=1</SQLITE_WINCE_DEFINES>
    <SQLITE_DEBUG_DEFINES>SQLITE_DEBUG=1;SQLITE_MEMDEBUG=1;SQLITE_ENABLE_EXPENSIVE_ASSERT=1</SQLITE_DEBUG_DEFINES>
    <SQLITE_RELEASE_DEFINES>SQLITE_WIN32_MALLOC=1</SQLITE_RELEASE_DEFINES>
    <SQLITE_DISABLE_WARNINGS>4055;4100;4127;4146;4210;4232;4244;4245;4267;4306;4389;4701;4703;4706</SQLITE_DISABLE_WARNINGS>
    <SQLITE_DISABLE_X64_WARNINGS></SQLITE_DISABLE_X64_WARNINGS>

Changes to SQLite.Interop/props/sqlite3.vsprops.

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<VisualStudioPropertySheet
	ProjectType="Visual C++"
	Version="8.00"
	Name="sqlite3"
	>
	<UserMacro
		Name="SQLITE_MANIFEST_VERSION"
		Value="3.7.17"
		PerformEnvironmentSet="true"
	/>
	<UserMacro
		Name="SQLITE_RC_VERSION"
		Value="3,7,17"
		PerformEnvironmentSet="true"
	/>
	<UserMacro
		Name="SQLITE_COMMON_DEFINES"
		Value="_CRT_SECURE_NO_DEPRECATE;_CRT_SECURE_NO_WARNINGS;_CRT_NONSTDC_NO_DEPRECATE;_CRT_NONSTDC_NO_WARNINGS;SQLITE_THREADSAFE=1;SQLITE_USE_URI=1;SQLITE_ENABLE_COLUMN_METADATA=1;SQLITE_ENABLE_STAT3=1;SQLITE_ENABLE_FTS3=1;SQLITE_ENABLE_LOAD_EXTENSION=1;SQLITE_ENABLE_RTREE=1;SQLITE_SOUNDEX=1"
		PerformEnvironmentSet="true"
	/>







|




|







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<VisualStudioPropertySheet
	ProjectType="Visual C++"
	Version="8.00"
	Name="sqlite3"
	>
	<UserMacro
		Name="SQLITE_MANIFEST_VERSION"
		Value="3.8.0"
		PerformEnvironmentSet="true"
	/>
	<UserMacro
		Name="SQLITE_RC_VERSION"
		Value="3,8,0"
		PerformEnvironmentSet="true"
	/>
	<UserMacro
		Name="SQLITE_COMMON_DEFINES"
		Value="_CRT_SECURE_NO_DEPRECATE;_CRT_SECURE_NO_WARNINGS;_CRT_NONSTDC_NO_DEPRECATE;_CRT_NONSTDC_NO_WARNINGS;SQLITE_THREADSAFE=1;SQLITE_USE_URI=1;SQLITE_ENABLE_COLUMN_METADATA=1;SQLITE_ENABLE_STAT3=1;SQLITE_ENABLE_FTS3=1;SQLITE_ENABLE_LOAD_EXTENSION=1;SQLITE_ENABLE_RTREE=1;SQLITE_SOUNDEX=1"
		PerformEnvironmentSet="true"
	/>

Changes to SQLite.Interop/src/core/sqlite3.c.

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20560
20561
20562
20563
20564
20565
20566
20567
20568
20569
20570
20571

20572
20573

20574
20575
20576
20577
20578
20579
20580
.....
20581
20582
20583
20584
20585
20586
20587




20588
20589
20590
20591
20592
20593
20594
.....
20609
20610
20611
20612
20613
20614
20615
20616
20617
20618
20619
20620
20621
20622
20623
20624
20625
20626
20627
20628
20629
20630
20631
20632
20633
20634
20635
20636
20637
20638
20639
20640
20641
20642
20643
20644
.....
22723
22724
22725
22726
22727
22728
22729
22730
22731
22732
22733
22734
22735
22736
22737
22738
22739
22740
22741
22742
22743
22744
22745
22746
22747
22748
22749
22750
22751
22752
22753
22754
22755
22756
22757
22758
22759
22760
22761
22762
22763
22764
22765
22766
22767
22768
22769
22770
22771
22772
22773
22774
22775
22776
22777
22778
22779
22780
22781
22782
22783
22784
22785
22786
22787
22788
22789
22790
22791
22792
22793
22794
22795
22796
22797
22798
22799
22800
22801
22802
22803
22804
22805
22806
22807
22808
22809
22810
22811
22812
22813
22814
22815
22816
22817
22818
22819
22820
22821
22822
22823
22824
22825
22826
22827
22828
22829
22830
22831
22832
22833
22834
22835
22836
22837
22838
22839
22840
22841
22842
22843
22844
22845
22846
22847
22848
22849
22850
22851
22852
22853
22854
22855
22856
22857
22858
22859
22860
22861
22862
22863
22864
22865
22866
22867
22868
22869
22870
22871
22872
22873
22874
22875
22876
.....
22927
22928
22929
22930
22931
22932
22933
22934
22935
22936
22937
22938
22939
22940
22941
22942
22943
22944
22945
22946
22947
.....
26864
26865
26866
26867
26868
26869
26870

26871
26872
26873
26874
26875
26876
26877


26878

26879
26880
26881
26882
26883
26884
26885
26886
.....
30522
30523
30524
30525
30526
30527
30528

30529
30530
30531
30532
30533
30534
30535
.....
30797
30798
30799
30800
30801
30802
30803
30804
30805
30806
30807
30808
30809
30810
30811
30812
30813
30814
30815
30816
30817
.....
30949
30950
30951
30952
30953
30954
30955

30956
30957
30958
30959
30960
30961
30962
.....
33529
33530
33531
33532
33533
33534
33535



33536
33537
33538
33539
33540
33541
33542
.....
33612
33613
33614
33615
33616
33617
33618

33619
33620
33621
33622

33623





33624
33625
33626
33627
33628
33629
33630
33631
33632
.....
34404
34405
34406
34407
34408
34409
34410

34411
34412
34413
34414
34415
34416
34417
34418
34419
34420
34421
.....
34576
34577
34578
34579
34580
34581
34582









34583
34584
34585
34586
34587
34588
34589
34590
34591
34592
34593
34594
34595
34596
34597
34598
34599
34600
34601
34602
34603
34604

34605
34606
34607
34608
34609
34610
34611



34612
34613
34614
34615
34616
34617
34618
34619
34620
34621
34622
34623
34624
34625



34626
34627
34628
34629
34630
34631
34632
34633
34634
34635








34636








34637
34638
34639
34640
34641
34642
34643
.....
34715
34716
34717
34718
34719
34720
34721
34722
34723
34724
34725
34726
34727
34728
34729
.....
34781
34782
34783
34784
34785
34786
34787
34788
34789
34790
34791
34792
34793
34794
34795
34796
.....
35213
35214
35215
35216
35217
35218
35219
35220
35221
35222
35223
35224
35225
35226
35227
35228
35229
35230
35231
35232




35233
35234
35235
35236




35237
35238
35239
35240
35241
35242
35243
.....
35571
35572
35573
35574
35575
35576
35577
35578
35579
35580
35581
35582
35583
35584
35585
.....
37218
37219
37220
37221
37222
37223
37224
37225
37226
37227
37228
37229
37230
37231
37232
.....
37421
37422
37423
37424
37425
37426
37427

37428
37429
37430
37431
37432
37433
37434
.....
38781
38782
38783
38784
38785
38786
38787







38788
38789
38790
38791
38792
38793
38794
.....
38847
38848
38849
38850
38851
38852
38853
38854
38855
38856
38857
38858
38859

38860
38861
38862
38863
38864

38865
38866
38867
38868
38869
38870
38871
38872
38873
.....
38963
38964
38965
38966
38967
38968
38969
38970
38971
38972
38973
38974
38975
38976
38977
.....
39342
39343
39344
39345
39346
39347
39348
39349
39350


39351


39352
39353
39354
39355

39356
39357
39358
39359
39360
39361
39362
.....
40140
40141
40142
40143
40144
40145
40146

40147
40148
40149
40150
40151
40152
40153
.....
40622
40623
40624
40625
40626
40627
40628
40629
40630
40631
40632
40633
40634
40635
40636
40637
40638
40639
40640
.....
41193
41194
41195
41196
41197
41198
41199
41200
41201
41202
41203
41204
41205
41206
41207
41208
41209
41210
41211
41212
.....
41706
41707
41708
41709
41710
41711
41712
41713
41714
41715
41716

41717
41718
41719
41720
41721
41722
41723
.....
41731
41732
41733
41734
41735
41736
41737



41738
41739
41740
41741
41742
41743
41744
41745
41746
41747
.....
41774
41775
41776
41777
41778
41779
41780
41781
41782
41783
41784
41785
41786

41787
41788
41789
41790
41791
41792
41793
41794
41795
41796
41797
41798
41799
41800
41801
41802
41803
41804
41805
41806





41807
41808
41809
41810
41811
41812
41813
.....
42542
42543
42544
42545
42546
42547
42548
42549

42550
42551
42552
42553
42554
42555
42556
.....
42699
42700
42701
42702
42703
42704
42705
42706
42707
42708
42709
42710
42711
42712

42713
42714
42715
42716
42717
42718
42719
42720
42721



42722

42723

42724
42725
42726
42727
42728
42729
42730
.....
43507
43508
43509
43510
43511
43512
43513
43514
43515
43516
43517
43518
43519
43520
43521
.....
43538
43539
43540
43541
43542
43543
43544
43545
43546
43547
43548
43549
43550
43551
43552
43553
43554
43555
43556
43557
43558
43559
43560
43561
43562
43563
43564
.....
44070
44071
44072
44073
44074
44075
44076
44077
44078
44079
44080
44081
44082
44083
44084
44085
44086
44087
44088
44089
44090
.....
44135
44136
44137
44138
44139
44140
44141
44142
44143
44144
44145
44146
44147
44148
44149
44150
.....
44917
44918
44919
44920
44921
44922
44923
44924





















44925
44926
44927
44928
44929
44930
44931
.....
45472
45473
45474
45475
45476
45477
45478
45479
45480
45481
45482
45483
45484
45485
45486
45487
45488
45489
45490
45491
45492
45493
45494
45495
45496
45497
45498
45499
45500
.....
47955
47956
47957
47958
47959
47960
47961
47962
47963
47964
47965
47966
47967
47968
47969
.....
49127
49128
49129
49130
49131
49132
49133
49134
49135
49136
49137
49138
49139
49140
49141








49142
49143
49144
49145
49146
49147
49148
.....
49151
49152
49153
49154
49155
49156
49157

49158
49159
49160
49161
49162
49163
49164
49165
49166
.....
50266
50267
50268
50269
50270
50271
50272



50273
50274
50275
50276
50277
50278
50279
.....
50291
50292
50293
50294
50295
50296
50297
50298
50299
50300
50301
50302
50303
50304
50305
.....
50479
50480
50481
50482
50483
50484
50485

50486
50487
50488
50489
50490
50491
50492
50493
.....
50757
50758
50759
50760
50761
50762
50763
50764
50765
50766
50767
50768
50769
50770
50771
.....
51123
51124
51125
51126
51127
51128
51129
51130
51131
51132
51133
51134
51135
51136
51137
51138

51139
51140
51141
51142
51143
51144
51145
.....
51179
51180
51181
51182
51183
51184
51185
51186
51187
51188
51189

51190
51191
51192
51193
51194
51195
51196
51197
51198
51199
51200
51201
.....
51707
51708
51709
51710
51711
51712
51713
51714
51715
51716
51717
51718
51719
51720
51721
51722
51723
51724

51725
51726
51727
51728
51729
51730
51731
.....
51923
51924
51925
51926
51927
51928
51929
51930
51931
51932
51933
51934
51935
51936
51937
.....
52505
52506
52507
52508
52509
52510
52511
52512
52513
52514
52515
52516
52517
52518
52519
.....
52589
52590
52591
52592
52593
52594
52595
52596
52597
52598
52599
52600
52601
52602
52603
.....
52700
52701
52702
52703
52704
52705
52706
52707
52708
52709
52710
52711
52712
52713
52714
.....
52815
52816
52817
52818
52819
52820
52821

52822
52823
52824
52825
52826
52827
52828
52829
52830
52831
52832
52833
52834
.....
52987
52988
52989
52990
52991
52992
52993
52994
52995
52996
52997
52998
52999
53000
53001
.....
53422
53423
53424
53425
53426
53427
53428
53429
53430
53431
53432
53433
53434
53435
53436
.....
53644
53645
53646
53647
53648
53649
53650
53651
53652
53653
53654
53655
53656
53657
53658
.....
53828
53829
53830
53831
53832
53833
53834
53835

53836
53837
53838
53839
53840
53841
53842
.....
53945
53946
53947
53948
53949
53950
53951
53952

53953
53954
53955
53956
53957
53958
53959
.....
54340
54341
54342
54343
54344
54345
54346



54347
54348

54349
54350
54351
54352
54353
54354
54355



54356
54357
54358
54359
54360
54361


54362
54363
54364
54365
54366
54367
54368
.....
54372
54373
54374
54375
54376
54377
54378


54379

54380
54381
54382
54383
54384
54385
54386
.....
54414
54415
54416
54417
54418
54419
54420





54421
54422

54423
54424
54425

54426
54427
54428
54429



54430
54431
54432
54433
54434
54435


54436
54437
54438
54439
54440
54441
54442

54443
54444
54445
54446
54447
54448
54449
.....
54559
54560
54561
54562
54563
54564
54565
54566
54567
54568
54569
54570
54571
54572
54573
.....
54623
54624
54625
54626
54627
54628
54629
54630
54631
54632
54633
54634
54635
54636
54637
.....
54702
54703
54704
54705
54706
54707
54708
54709
54710
54711
54712
54713
54714
54715
54716
54717
.....
54735
54736
54737
54738
54739
54740
54741
54742
54743
54744
54745
54746
54747
54748
54749
.....
54751
54752
54753
54754
54755
54756
54757
54758
54759
54760
54761
54762
54763
54764
54765
54766
54767
54768
54769
54770
54771
54772
54773
54774
54775
54776
54777
54778
54779
.....
54833
54834
54835
54836
54837
54838
54839
54840
54841
54842
54843
54844
54845
54846
54847
.....
54860
54861
54862
54863
54864
54865
54866
54867
54868
54869
54870
54871
54872
54873
54874
.....
54906
54907
54908
54909
54910
54911
54912
54913
54914
54915
54916
54917
54918
54919
54920
.....
56805
56806
56807
56808
56809
56810
56811
56812
56813
56814
56815
56816
56817
56818
56819
.....
56826
56827
56828
56829
56830
56831
56832
56833
56834
56835
56836
56837
56838
56839
56840
.....
57004
57005
57006
57007
57008
57009
57010
57011
57012
57013
57014
57015
57016
57017
57018
.....
57039
57040
57041
57042
57043
57044
57045
57046
57047
57048
57049
57050
57051
57052
57053
57054
57055
57056
57057
57058
57059
57060
57061
57062
57063
.....
57264
57265
57266
57267
57268
57269
57270
57271
57272
57273
57274
57275
57276
57277
57278
.....
57461
57462
57463
57464
57465
57466
57467
57468
57469
57470
57471
57472
57473
57474
57475
.....
58043
58044
58045
58046
58047
58048
58049
58050
58051
58052
58053
58054
58055
58056
58057
58058
58059
58060
58061
58062
.....
58426
58427
58428
58429
58430
58431
58432
58433
58434
58435
58436
58437
58438
58439
58440
.....
59581
59582
59583
59584
59585
59586
59587
59588


59589
59590
59591
59592
59593
59594
59595
59596
59597
59598
59599
59600
59601


59602
59603
59604

59605
59606
59607
59608
59609
59610
59611
59612
59613
59614
59615
59616
59617
59618
59619
59620
59621
59622
.....
60194
60195
60196
60197
60198
60199
60200
60201
60202
60203
60204
60205
60206
60207
60208
60209
.....
60347
60348
60349
60350
60351
60352
60353

60354
60355
60356
60357
60358




60359
60360
















60361



60362
60363
60364


60365
60366
60367
60368
60369
60370


60371
60372


60373
60374
60375



60376
60377

60378
60379


60380
60381
60382
60383
60384
60385
60386
60387
60388

60389
60390
60391
60392
60393
60394
60395
.....
60507
60508
60509
60510
60511
60512
60513
60514
60515
60516
60517
60518
60519
60520
60521
60522
.....
60544
60545
60546
60547
60548
60549
60550
60551
60552
60553
60554
60555
60556
60557
60558
60559
60560
60561
60562
60563
60564
.....
60669
60670
60671
60672
60673
60674
60675
60676
60677
60678
60679
60680
60681
60682
60683
60684
60685
60686
60687
60688
60689


60690
60691
60692
60693
60694
60695
60696
.....
61580
61581
61582
61583
61584
61585
61586




61587
61588
61589
61590
61591
61592
61593
.....
61688
61689
61690
61691
61692
61693
61694
61695
61696
61697
61698
61699
61700
61701
61702
.....
61907
61908
61909
61910
61911
61912
61913
61914
61915
61916
61917
61918
61919
61920
61921
61922
61923
61924
61925
61926

61927
61928
61929
61930
61931

61932
61933
61934
61935
61936

61937
61938
61939
61940
61941
61942
61943
61944
61945
61946
61947
61948
61949
61950
61951
61952
61953
61954
.....
61994
61995
61996
61997
61998
61999
62000

62001
62002
62003
62004
62005
62006
62007
.....
62012
62013
62014
62015
62016
62017
62018

62019

62020
62021
62022
62023
62024
62025
62026
.....
62065
62066
62067
62068
62069
62070
62071
62072

62073
62074
62075
62076
62077
62078
62079
62080
.....
62119
62120
62121
62122
62123
62124
62125
62126
62127
62128
62129
62130
62131
62132
62133
.....
62144
62145
62146
62147
62148
62149
62150


62151
62152
62153
62154
62155
62156
62157
.....
62200
62201
62202
62203
62204
62205
62206
62207
62208
62209
62210

62211

62212
62213
62214
62215
62216
62217
62218
.....
62220
62221
62222
62223
62224
62225
62226
62227
62228
62229
62230
62231
62232
62233
62234
.....
62368
62369
62370
62371
62372
62373
62374
62375
62376
62377
62378










62379
62380
62381
62382


62383
62384



62385
62386
62387
62388



62389
62390
62391
62392
62393
62394
62395
.....
62900
62901
62902
62903
62904
62905
62906
62907
62908
62909
62910
62911
62912
62913
62914
62915
62916
62917
62918
.....
62927
62928
62929
62930
62931
62932
62933
62934
62935
62936
62937
62938
62939
62940








62941



62942
62943
62944
62945
62946
62947
62948
62949
62950
62951
62952
62953
62954
62955
62956
62957
62958
62959
62960
62961
62962
.....
63163
63164
63165
63166
63167
63168
63169
63170
63171
63172
63173
63174
63175
63176
63177
.....
63194
63195
63196
63197
63198
63199
63200















63201
63202
63203
63204
63205
63206
63207
.....
63407
63408
63409
63410
63411
63412
63413

63414
63415
63416
63417
63418
63419

63420
63421
63422
63423
63424
63425
63426
.....
63476
63477
63478
63479
63480
63481
63482

63483
63484
63485
63486
63487
63488
63489
63490
63491
63492

63493
63494
63495
63496
63497
63498
63499
63500
63501

63502
63503
63504
63505
63506
63507
63508
.....
63578
63579
63580
63581
63582
63583
63584
63585
63586
63587
63588
63589


63590
63591
63592
63593
63594
63595
63596
63597
63598

63599
63600
63601
63602
63603
63604
63605
63606
63607
63608
63609
63610
63611
63612
63613
63614
63615
63616
.....
63777
63778
63779
63780
63781
63782
63783
63784
63785
63786
63787
63788
63789
63790

63791
63792
63793
63794
63795
63796
63797
63798
63799
63800
63801
63802
63803
63804
63805
63806
63807
63808
63809
63810
63811
63812
63813
63814
63815
63816
63817
63818
63819
63820
63821


63822










63823
63824
63825
63826
63827

63828
63829
63830
63831
63832
63833
63834
.....
64009
64010
64011
64012
64013
64014
64015
64016
64017
64018
64019
64020
64021
64022
64023
64024
64025
64026
64027
64028
64029
.....
64492
64493
64494
64495
64496
64497
64498
64499
64500
64501
64502
64503
64504
64505
64506
64507
64508
.....
64546
64547
64548
64549
64550
64551
64552
64553
64554
64555
64556
64557
64558
64559
64560
64561
64562
.....
64586
64587
64588
64589
64590
64591
64592
64593
64594
64595
64596
64597
64598
64599
64600
.....
65381
65382
65383
65384
65385
65386
65387
65388
65389
65390
65391
65392
65393
65394
65395
65396
65397
65398
65399
65400
65401
65402
65403
65404
65405
65406
65407
.....
65436
65437
65438
65439
65440
65441
65442


65443
65444
65445

65446
65447
65448
65449
65450
65451
65452
65453
65454
65455
65456
65457
65458
65459
.....
65891
65892
65893
65894
65895
65896
65897

65898
65899
65900
65901
65902
65903
65904
65905








65906
65907
65908
65909
65910
65911
65912
.....
65919
65920
65921
65922
65923
65924
65925

65926
65927
65928
65929
65930
65931
65932
.....
65944
65945
65946
65947
65948
65949
65950
65951
65952
65953
65954
65955
65956
65957
65958
65959
65960
65961
65962
65963
65964
65965
65966
65967
65968
65969
65970
65971
65972
65973
65974
65975
65976
65977
65978
.....
66059
66060
66061
66062
66063
66064
66065
66066
66067

































66068
66069
66070
66071
66072
66073
66074
.....
66181
66182
66183
66184
66185
66186
66187
66188
66189
66190
66191
66192
66193
66194
66195
.....
66743
66744
66745
66746
66747
66748
66749
66750
66751
66752
66753
66754
66755
66756
66757
66758
66759
66760
66761
66762


66763
66764
66765
66766
66767
66768
66769
66770
66771
66772
66773
66774
66775
66776
66777
66778
66779
66780
66781
66782
66783
66784
66785
66786
66787
66788
66789
66790
66791
66792
66793
66794
66795
66796
66797
66798
66799
66800
66801

66802
66803
66804


66805
66806
66807
66808
66809
66810
66811
.....
67173
67174
67175
67176
67177
67178
67179


67180
67181
67182
67183
67184
67185
67186
67187
67188
67189
67190
67191
67192
.....
68034
68035
68036
68037
68038
68039
68040

68041
68042
68043

68044
68045
68046
68047
68048
68049
68050
.....
68076
68077
68078
68079
68080
68081
68082

68083
68084
68085
68086
68087
68088
68089
.....
68093
68094
68095
68096
68097
68098
68099
68100
68101
68102
68103
68104
68105
68106
68107
.....
68163
68164
68165
68166
68167
68168
68169

68170
68171
68172
68173
68174
68175
68176
.....
68196
68197
68198
68199
68200
68201
68202
68203

68204
68205
68206
68207
68208
68209
68210
68211
68212
68213
68214
68215
68216
68217
68218
68219
68220
68221
68222
68223
.....
68267
68268
68269
68270
68271
68272
68273
68274
68275
68276
68277
68278
68279
68280
68281
68282
.....
68287
68288
68289
68290
68291
68292
68293


68294
68295




68296
68297
68298
68299
68300
68301
68302
.....
68303
68304
68305
68306
68307
68308
68309
68310
68311
68312
68313
68314
68315
68316
68317
.....
68321
68322
68323
68324
68325
68326
68327

68328
68329
68330
68331
68332
68333
68334
.....
68345
68346
68347
68348
68349
68350
68351

68352
68353
68354
68355
68356
68357
68358
.....
68374
68375
68376
68377
68378
68379
68380

68381
68382
68383
68384
68385
68386
68387
.....
68426
68427
68428
68429
68430
68431
68432

68433
68434
68435
68436
68437
68438
68439
.....
68523
68524
68525
68526
68527
68528
68529


68530
68531
68532
68533
68534
68535
68536
.....
69717
69718
69719
69720
69721
69722
69723
69724
69725
69726
69727
69728
69729
69730
69731
.....
69809
69810
69811
69812
69813
69814
69815
69816
69817
69818
69819
69820
69821
69822
69823
.....
69891
69892
69893
69894
69895
69896
69897
69898
69899
69900
69901
69902
69903
69904
69905
69906
69907
69908
69909
69910
69911
69912
69913
69914
69915
69916
69917
69918
69919
69920
69921
69922
69923
69924
69925
69926
69927
69928
69929
69930
69931
69932
69933
69934
.....
70141
70142
70143
70144
70145
70146
70147

70148
70149
70150

70151

70152
70153
70154
70155
70156
70157
70158
70159
70160
70161
70162
70163
.....
70198
70199
70200
70201
70202
70203
70204

70205
70206
70207
70208
70209
70210
70211
.....
70246
70247
70248
70249
70250
70251
70252

70253
70254
70255
70256
70257
70258
70259
.....
70398
70399
70400
70401
70402
70403
70404

70405
70406
70407
70408
70409
70410
70411
.....
70460
70461
70462
70463
70464
70465
70466
70467
70468
70469
70470
70471
70472
70473
70474
70475
70476
70477
70478
70479
70480
70481
70482
70483
70484
70485
70486
.....
70692
70693
70694
70695
70696
70697
70698


70699
70700
70701
70702
70703
70704
70705
70706
.....
70713
70714
70715
70716
70717
70718
70719
70720
70721
70722
70723
70724
70725
70726
70727
70728
70729
.....
70919
70920
70921
70922
70923
70924
70925

70926
70927
70928
70929
70930
70931
70932
.....
70970
70971
70972
70973
70974
70975
70976

70977
70978
70979
70980
70981
70982
70983
.....
70993
70994
70995
70996
70997
70998
70999
71000
71001
71002
71003
71004
71005
71006
71007
.....
71052
71053
71054
71055
71056
71057
71058

71059
71060
71061
71062
71063
71064
71065
.....
71071
71072
71073
71074
71075
71076
71077

71078
71079
71080
71081
71082
71083
71084
.....
71147
71148
71149
71150
71151
71152
71153
71154
71155
71156
71157
71158
71159
71160
71161
.....
71193
71194
71195
71196
71197
71198
71199

71200
71201
71202
71203
71204
71205
71206
71207
71208
71209
71210
71211
71212
71213
.....
71279
71280
71281
71282
71283
71284
71285
71286
71287
71288
71289
71290
71291
71292
71293
.....
71332
71333
71334
71335
71336
71337
71338
71339
71340
71341
71342
71343
71344
71345
71346
.....
71387
71388
71389
71390
71391
71392
71393
71394
71395
71396
71397
71398
71399
71400
71401
71402
71403
71404
71405
71406
71407
71408
71409
71410
.....
71417
71418
71419
71420
71421
71422
71423

71424
71425
71426
71427
71428
71429
71430
71431
71432
71433
71434
71435
71436
71437
71438
71439
.....
71470
71471
71472
71473
71474
71475
71476

71477
71478
71479
71480
71481
71482
71483
.....
71488
71489
71490
71491
71492
71493
71494
71495
71496
71497
71498
71499
71500
71501
71502
.....
71655
71656
71657
71658
71659
71660
71661


71662
71663
71664
71665
71666
71667
71668
.....
72222
72223
72224
72225
72226
72227
72228
72229
72230
72231
72232
72233
72234
72235
72236
.....
73497
73498
73499
73500
73501
73502
73503
73504
73505
73506
73507
73508
73509
73510
73511
73512
73513
73514
73515
73516
.....
73939
73940
73941
73942
73943
73944
73945
73946
73947
73948
73949
73950
73951
73952
73953
73954
73955
73956
73957

73958
73959
73960
73961
73962
73963
73964
.....
74124
74125
74126
74127
74128
74129
74130








74131
74132
74133
74134
74135

74136
74137
74138
74139
74140
74141
74142
.....
74271
74272
74273
74274
74275
74276
74277






74278
74279
74280
74281
74282
74283
74284
74285
74286
74287
74288
.....
74405
74406
74407
74408
74409
74410
74411

































74412
74413
74414
74415
74416
74417
74418
.....
74505
74506
74507
74508
74509
74510
74511

74512
74513
74514
74515
74516
74517
74518
.....
74570
74571
74572
74573
74574
74575
74576
74577
74578
74579
74580
74581
74582
74583
74584
74585
74586
74587
74588
74589
74590
74591

74592
74593
74594
74595
74596
74597
74598
74599
74600
74601
74602
74603
74604
.....
74681
74682
74683
74684
74685
74686
74687
74688
74689
74690
74691
74692
74693
74694
74695
.....
74808
74809
74810
74811
74812
74813
74814
74815
74816
74817
74818
74819
74820
74821
74822
.....
74856
74857
74858
74859
74860
74861
74862
74863
74864
74865
74866
74867
74868
74869
74870
.....
74882
74883
74884
74885
74886
74887
74888


74889
74890
74891
74892
74893
74894
74895
74896
74897

74898
74899
74900
74901
74902
74903
74904
74905
.....
74909
74910
74911
74912
74913
74914
74915
74916
74917
74918
74919
74920
74921
74922
74923
.....
75034
75035
75036
75037
75038
75039
75040
75041
75042
75043
75044
75045
75046
75047
75048
75049
75050
75051
75052
75053
75054
75055
75056
75057
75058
75059
75060
.....
75215
75216
75217
75218
75219
75220
75221










































75222
75223
75224
75225
75226
75227
75228
.....
75333
75334
75335
75336
75337
75338
75339
75340
75341
75342
75343
75344
75345
75346
75347
75348
.....
76139
76140
76141
76142
76143
76144
76145

76146
76147
76148
76149
76150
76151
76152
.....
76497
76498
76499
76500
76501
76502
76503

76504
76505
76506
76507
76508
76509
76510
.....
76815
76816
76817
76818
76819
76820
76821
76822
76823
76824
76825
76826
76827
76828
76829
76830
76831
76832
76833
76834
76835
76836
76837
.....
76865
76866
76867
76868
76869
76870
76871
76872
76873
76874
76875
76876
76877
76878
76879
.....
76910
76911
76912
76913
76914
76915
76916
76917
76918
76919
76920

76921
76922
76923
76924
76925
76926
76927
.....
76937
76938
76939
76940
76941
76942
76943
76944
76945
76946
76947
76948
76949
76950
76951
76952
76953
.....
76955
76956
76957
76958
76959
76960
76961

76962

76963
76964
76965


76966
76967
76968
76969
76970
76971
76972
76973
76974
76975
76976
.....
76979
76980
76981
76982
76983
76984
76985

76986
76987

76988
76989
76990
76991
76992
76993
76994
.....
77019
77020
77021
77022
77023
77024
77025
77026
77027
77028
77029
77030
77031
77032
77033
77034
.....
77580
77581
77582
77583
77584
77585
77586
77587
77588
77589

77590

77591




77592
77593
77594
77595
77596
77597
77598
77599
77600
77601
77602
.....
78716
78717
78718
78719
78720
78721
78722

78723
78724
78725
78726
78727
78728
78729
.....
79011
79012
79013
79014
79015
79016
79017






79018
79019
79020
79021
79022
79023
79024
79025
79026
79027
79028
79029
79030
79031
79032
79033
79034
79035
79036
79037
79038
79039
79040
79041
79042
79043
79044
79045
79046
79047
79048
79049
79050



79051
79052
79053
79054
79055
79056
79057
.....
79061
79062
79063
79064
79065
79066
79067



79068
79069
79070
79071
79072
79073
79074
79075
79076
79077
79078
79079
79080
79081
79082
79083
79084
79085







































79086
79087
79088
79089
79090
79091
79092
.....
79263
79264
79265
79266
79267
79268
79269
79270
79271
79272
79273
79274
79275
79276
79277
.....
80265
80266
80267
80268
80269
80270
80271
80272
80273
80274
80275
80276
80277
80278
80279
.....
80680
80681
80682
80683
80684
80685
80686

80687
80688
80689
80690
80691
80692
80693
.....
80739
80740
80741
80742
80743
80744
80745

80746
80747
80748
80749
80750
80751
80752
.....
80898
80899
80900
80901
80902
80903
80904
80905
80906
80907
80908
80909
80910
80911
80912
80913
80914
80915
80916

80917
80918
80919
80920

80921
80922
80923
80924
80925
80926

80927
80928
80929
80930
80931
80932
80933
80934
80935
80936
80937
80938
80939
80940
80941
80942


80943
80944
80945
80946
80947
80948
80949
.....
81118
81119
81120
81121
81122
81123
81124

81125
81126

81127
81128
81129
81130
81131
81132
81133
.....
81523
81524
81525
81526
81527
81528
81529

81530
81531
81532
81533
81534
81535
81536
.....
82559
82560
82561
82562
82563
82564
82565

82566
82567
82568
82569
82570
82571
82572
.....
83402
83403
83404
83405
83406
83407
83408
83409

83410
83411
83412
83413
83414
83415
83416
.....
83453
83454
83455
83456
83457
83458
83459

83460
83461
83462
83463
83464
83465
83466
.....
83696
83697
83698
83699
83700
83701
83702
83703
83704
83705
83706
83707
83708
83709
83710
83711
83712
83713
83714
83715
83716
83717
83718
83719
83720
83721
83722
83723
83724
83725
83726
83727
83728
83729
.....
84567
84568
84569
84570
84571
84572
84573

84574
84575
84576
84577
84578
84579
84580
.....
84606
84607
84608
84609
84610
84611
84612
84613
84614

84615
84616
84617
84618
84619
84620
84621
.....
84658
84659
84660
84661
84662
84663
84664
84665
84666
84667
84668
84669
84670
84671
84672
.....
84680
84681
84682
84683
84684
84685
84686
84687
84688
84689
84690
84691
84692
84693
84694
.....
84726
84727
84728
84729
84730
84731
84732
84733





84734
84735
84736
84737
84738
84739
84740
.....
84872
84873
84874
84875
84876
84877
84878

84879
84880





84881
84882
84883
84884
84885
84886
84887
.....
84930
84931
84932
84933
84934
84935
84936

84937
84938
84939
84940
84941
84942
84943
.....
85028
85029
85030
85031
85032
85033
85034
85035
85036
85037
85038
85039
85040
85041
85042
.....
85046
85047
85048
85049
85050
85051
85052
85053

85054
85055
85056
85057
85058
85059
85060
85061
85062
85063
85064
85065
.....
85107
85108
85109
85110
85111
85112
85113
85114
85115
85116
85117
85118
85119
85120
85121
85122
85123
85124
.....
85361
85362
85363
85364
85365
85366
85367
85368
85369
85370
85371
85372
85373
85374
85375
85376
85377
85378
85379
85380
85381
85382
85383
.....
85988
85989
85990
85991
85992
85993
85994
85995
85996
85997
85998

85999
86000
86001
86002
86003
86004
86005
86006
86007
86008
86009
86010
86011
86012
86013
86014
86015
86016
86017
86018
86019
86020
.....
87086
87087
87088
87089
87090
87091
87092


87093
87094
87095
87096
87097

87098
87099
87100
87101
87102
87103
87104
87105
87106
87107
87108
87109
87110







87111
87112
87113
87114
87115
87116
87117

87118
87119
87120
87121
87122
87123
87124










87125
87126
87127
87128
87129
87130
87131
.....
87376
87377
87378
87379
87380
87381
87382
87383
87384
87385
87386
87387
87388
87389
87390
.....
88035
88036
88037
88038
88039
88040
88041
88042
88043
88044
88045
88046
88047
88048
88049
88050
88051
88052
.....
88227
88228
88229
88230
88231
88232
88233
88234
88235
88236
88237
88238
88239
88240
88241
.....
88674
88675
88676
88677
88678
88679
88680
88681
88682
88683
88684
88685
88686
88687
88688
88689
88690
.....
89294
89295
89296
89297
89298
89299
89300


89301

89302
89303
89304
89305
89306
89307
89308
.....
89685
89686
89687
89688
89689
89690
89691

89692

89693
89694
89695
89696
89697
89698
89699
.....
91480
91481
91482
91483
91484
91485
91486

91487
91488









91489
91490
91491
91492
91493
91494
91495
.....
91502
91503
91504
91505
91506
91507
91508

91509
91510
91511
91512
91513
91514
91515
.....
91571
91572
91573
91574
91575
91576
91577

91578
91579
91580
91581
91582
91583
91584
.....
91600
91601
91602
91603
91604
91605
91606
91607
91608
91609
91610
91611
91612
91613
91614
91615
91616
91617
91618



91619
91620
91621
91622
91623
91624
91625
.....
91713
91714
91715
91716
91717
91718
91719

91720
91721
91722
91723
91724
91725
91726
.....
91734
91735
91736
91737
91738
91739
91740



91741
91742
91743
91744
91745
91746
91747
.....
91890
91891
91892
91893
91894
91895
91896
91897
91898
91899
91900
91901
91902
91903
91904
.....
92647
92648
92649
92650
92651
92652
92653


92654
92655
92656
92657
92658

92659
92660
92661
92662
92663
92664
92665
.....
93307
93308
93309
93310
93311
93312
93313





























93314
93315
93316
93317
93318
93319
93320
.....
93528
93529
93530
93531
93532
93533
93534




























93535
93536
93537
93538
93539
93540
93541
.....
93547
93548
93549
93550
93551
93552
93553

93554

93555
93556
93557
93558
93559
93560
93561
.....
93568
93569
93570
93571
93572
93573
93574
93575
93576
93577
93578
93579
93580

93581
93582
93583
93584
93585
93586
93587
.....
93599
93600
93601
93602
93603
93604
93605

93606
93607
93608
93609
93610
93611
93612
.....
94145
94146
94147
94148
94149
94150
94151
94152
94153
94154
94155

94156



94157
94158
94159
94160
94161
94162
94163
.....
94330
94331
94332
94333
94334
94335
94336

94337
94338
94339
94340
94341
94342
94343
94344
94345
94346
94347
94348
94349
94350
94351
94352
.....
94680
94681
94682
94683
94684
94685
94686
94687
94688
94689
94690
94691
94692
94693
94694
.....
94764
94765
94766
94767
94768
94769
94770
94771
94772
94773
94774
94775
94776
94777
94778
94779
94780
.....
94791
94792
94793
94794
94795
94796
94797

94798

94799


94800
94801
94802
94803
94804
94805
94806
94807
94808
94809
94810
.....
94811
94812
94813
94814
94815
94816
94817
94818

94819
94820
94821
94822
94823
94824
94825

94826
94827
94828



94829
94830
94831
94832
94833
94834
94835
94836
94837
94838
94839
94840
94841
94842

94843
94844
94845
94846
94847
94848
94849
94850
94851
94852



94853


94854

94855
94856
94857
94858
94859
94860
94861
.....
95138
95139
95140
95141
95142
95143
95144
95145
95146
95147
95148
95149
95150
95151
95152
95153
95154
95155
95156
95157
95158
95159
95160
95161
95162
95163
95164
95165
95166
95167
95168
95169
.....
95177
95178
95179
95180
95181
95182
95183
95184
95185
95186
95187
95188
95189
95190
95191
95192
95193
95194
95195
95196
95197
95198
95199
95200
95201
.....
95790
95791
95792
95793
95794
95795
95796
95797
95798
95799
95800
95801
95802
95803
95804
.....
95812
95813
95814
95815
95816
95817
95818
95819
95820
95821
95822
95823
95824
95825
95826
.....
96007
96008
96009
96010
96011
96012
96013






96014
96015
96016
96017
96018
96019
96020
.....
96176
96177
96178
96179
96180
96181
96182
96183
96184
96185
96186
96187
96188
96189
96190
.....
96868
96869
96870
96871
96872
96873
96874



















96875
96876
96877
96878
96879
96880
96881
.....
96885
96886
96887
96888
96889
96890
96891
96892
96893
96894
96895

96896
96897
96898
96899
96900
96901
96902
96903
96904
96905
96906
96907
96908
96909
96910
96911
96912
96913
96914
96915
96916
96917
.....
97590
97591
97592
97593
97594
97595
97596
97597
97598
97599
97600
97601
97602
97603
97604
.....
97605
97606
97607
97608
97609
97610
97611
97612
97613
97614
97615
97616
97617
97618
97619
97620
.....
97800
97801
97802
97803
97804
97805
97806
97807
97808
97809
97810
97811
97812
97813
97814
97815
97816
.....
98009
98010
98011
98012
98013
98014
98015
98016
98017
98018
98019
98020
98021
98022
98023
98024
98025
98026
98027
98028
98029
98030
98031
98032
98033
98034
98035
98036
98037
98038
98039
.....
98394
98395
98396
98397
98398
98399
98400
98401
98402
98403
98404
98405
98406
98407
98408
98409
98410
98411
98412
98413
.....
98436
98437
98438
98439
98440
98441
98442
98443
98444
98445
98446
98447
98448
98449
98450
98451
98452
98453
98454
98455
.....
99707
99708
99709
99710
99711
99712
99713
99714
99715
99716


99717

99718
99719
99720
99721
99722
99723
99724
.....
99951
99952
99953
99954
99955
99956
99957
99958
99959
99960
99961
99962
99963
99964
99965
99966
99967
99968
99969
......
100113
100114
100115
100116
100117
100118
100119
100120
100121
100122
100123
100124
100125
100126
100127
......
100245
100246
100247
100248
100249
100250
100251
100252
100253
100254
100255
100256
100257
100258
100259
......
100266
100267
100268
100269
100270
100271
100272
100273
100274
100275
100276
100277
100278
100279
100280
......
100306
100307
100308
100309
100310
100311
100312
100313
100314
100315
100316
100317
100318
100319
100320
......
100329
100330
100331
100332
100333
100334
100335
100336
100337
100338
100339

100340
100341




100342
100343


100344
100345
100346
100347
100348
100349
100350
100351
100352
100353
100354
100355
100356

100357
100358
100359
100360
100361
100362
100363
......
100382
100383
100384
100385
100386
100387
100388
100389
100390
100391
100392
100393
100394
100395
100396
100397
100398
......
100464
100465
100466
100467
100468
100469
100470
100471

100472
100473

100474
100475
100476
100477
100478
100479
100480
......
100747
100748
100749
100750
100751
100752
100753
100754
100755
100756
100757
100758
100759
100760
100761
100762
......
102107
102108
102109
102110
102111
102112
102113
102114
102115
102116
102117
102118
102119
102120
102121
......
102486
102487
102488
102489
102490
102491
102492
102493
102494
102495
102496
102497
102498
102499
102500
......
102558
102559
102560
102561
102562
102563
102564
102565
102566
102567
102568
102569
102570
102571
102572
......
103027
103028
103029
103030
103031
103032
103033
103034
103035
103036
103037
103038
103039
103040
103041
......
104077
104078
104079
104080
104081
104082
104083
104084
104085
104086
104087
104088
104089
104090
104091
104092
104093
104094
104095
104096
104097
104098
104099
104100
104101
104102
104103
104104
104105
104106
104107
......
104395
104396
104397
104398
104399
104400
104401

104402
104403
104404
104405
104406
104407
104408
104409
104410
104411
104412

104413






































































































































































104414
104415
104416
104417
104418
104419
104420
......
104434
104435
104436
104437
104438
104439
104440
104441
104442
104443
104444
104445
104446
104447
104448
104449
104450
......
104459
104460
104461
104462
104463
104464
104465
104466
104467
104468
104469
104470
104471
104472
104473
......
104493
104494
104495
104496
104497
104498
104499
















104500
104501
104502
104503
104504
104505
104506
104507
104508
104509
104510
104511
104512
104513
104514
104515
104516
104517
104518
104519
104520
104521
104522
104523
104524
......
104570
104571
104572
104573
104574
104575
104576
104577
104578
104579
104580
104581
104582
104583


104584
104585
104586

































104587

104588
104589

104590
104591
104592
104593
104594
104595
104596
......
104601
104602
104603
104604
104605
104606
104607
104608
104609
104610
104611
104612
104613
104614
104615
104616
104617
104618
104619
104620
104621
104622
104623
104624
104625
104626
104627
104628
104629
104630
104631
104632
104633
104634
104635
104636
104637
104638
104639
104640
104641
104642
104643
104644
104645
104646
104647
104648
104649
104650
104651
104652
104653
104654
104655
104656
104657
104658
104659
104660
104661
104662
104663
104664
104665
104666
104667
104668
104669
104670
104671
104672
104673
104674
104675
104676
104677
104678
104679
104680
104681
104682
104683
104684
104685
104686
104687
104688



























































104689
104690
104691
104692
104693
104694
104695
104696
104697
104698
104699
104700
......
104715
104716
104717
104718
104719
104720
104721
104722
104723
104724
104725
104726
104727
104728
104729
......
104753
104754
104755
104756
104757
104758
104759
104760
104761
104762
104763
104764
104765
104766
104767
104768
104769
104770
......
104796
104797
104798
104799
104800
104801
104802
104803
104804
104805
104806
104807
104808
104809
104810
104811
104812
104813
104814
104815
104816
104817
104818
104819
104820
104821
104822
104823
104824
104825
104826
104827
104828
104829
104830
104831
104832
104833
104834
104835
......
104841
104842
104843
104844
104845
104846
104847
104848
104849
104850
104851
104852
104853
104854
104855
104856
104857
104858
104859
104860
104861
104862
104863
104864
104865
104866
......
104906
104907
104908
104909
104910
104911
104912
104913
104914
104915
104916
104917
104918
104919
104920
104921
104922
104923
104924
104925
104926
104927
......
104933
104934
104935
104936
104937
104938
104939
104940
104941
104942
104943
104944
104945
104946
104947
104948
104949
104950
......
104992
104993
104994
104995
104996
104997
104998




























































































































104999
105000
105001
105002
105003
105004
105005
......
105024
105025
105026
105027
105028
105029
105030
105031
105032
105033
105034
105035
105036
105037
105038
105039
105040
105041
105042
105043
105044
105045
105046
105047
105048
105049
105050


105051
105052
105053
105054
105055
105056


105057
105058
105059
105060
105061
105062
105063
105064
105065
105066
105067
105068
105069
105070
105071
105072
105073
105074
105075
105076
105077
105078
105079
105080
105081
105082
105083
105084
105085

105086
105087
105088
105089
105090
105091
105092
105093
105094
105095
105096
105097
105098
105099
105100
105101
105102
105103
105104
105105
105106
105107
105108
105109
105110
105111
105112
105113
105114
105115
105116
105117
105118
105119
105120
105121
105122
105123
105124
105125
......
105175
105176
105177
105178
105179
105180
105181
105182
105183
105184
105185
105186
105187
105188
105189
......
105317
105318
105319
105320
105321
105322
105323
105324
105325
105326
105327
105328
105329
105330
105331
105332
105333
105334
......
105343
105344
105345
105346
105347
105348
105349
105350

105351
105352
105353
105354
105355
105356
105357
105358
105359
105360
105361
......
105366
105367
105368
105369
105370
105371
105372
105373
105374
105375
105376
105377
105378
105379
105380
......
105392
105393
105394
105395
105396
105397
105398
105399
105400
105401
105402
105403
105404
105405
105406
105407
105408
105409
105410
105411
105412
105413
105414
105415
105416
105417
105418
105419
105420
105421
105422
105423
105424
105425
105426
105427
105428
105429
......
105477
105478
105479
105480
105481
105482
105483
105484
105485
105486
105487
105488
105489
105490
105491
......
105496
105497
105498
105499
105500
105501
105502
105503
105504
105505
105506
105507
105508
105509
105510
......
105530
105531
105532
105533
105534
105535
105536
105537
105538
105539
105540
105541
105542
105543
105544
105545
105546
105547
105548
105549
105550
105551
105552
105553
105554
105555
105556
105557
105558
105559
......
105594
105595
105596
105597
105598
105599
105600

105601
105602
105603
105604
105605
105606
105607
105608
105609
105610
105611
105612
105613
105614
105615
105616
105617
105618
105619
105620
105621
105622
105623
105624
105625
......
105772
105773
105774
105775
105776
105777
105778
105779
105780
105781
105782
105783
105784
105785
105786
105787
105788
......
105855
105856
105857
105858
105859
105860
105861

105862
105863
105864
105865
105866
105867
105868
......
105889
105890
105891
105892
105893
105894
105895
105896
105897
105898
105899
105900
105901
105902
105903
105904
105905
105906
105907
......
105923
105924
105925
105926
105927
105928
105929
105930
105931
105932
105933
105934
105935
105936
105937
105938
105939
105940
105941
105942
105943
105944
105945
105946
105947
105948
105949
105950
105951
105952
105953
105954
105955
105956
105957
105958
105959
105960
105961
105962
105963
105964
105965
105966
105967
105968
105969
105970
105971
105972
105973
105974
105975
105976
105977
105978
105979
105980
105981
105982
105983
105984
105985
105986
105987
105988
105989
105990
105991
105992
105993
105994
105995

105996
105997
105998
105999
106000
106001
106002
106003
106004
106005
106006
106007
106008
......
106050
106051
106052
106053
106054
106055
106056
106057
106058
106059
106060
106061
106062
106063

106064
106065
106066
106067
106068
106069




106070










































106071
106072

106073
106074








106075
106076
106077
106078
106079
106080
106081
106082
106083
106084
106085
106086
106087
......
106111
106112
106113
106114
106115
106116
106117
106118
106119
106120
106121
106122
106123
106124
106125
106126
106127
106128
106129
106130
106131
106132
106133
106134
106135
106136
106137
106138
106139
106140
106141
106142
106143
106144
106145
106146
106147
106148
106149
106150
106151
106152
106153
106154
106155
106156
106157
106158
106159
106160
106161
106162
106163
106164
106165
106166
106167
106168
106169
106170
106171
106172
106173
106174
106175
106176
106177
106178
106179
106180
106181
106182
106183
106184
106185
106186
106187
106188
106189
106190
106191
106192
106193
106194
106195
106196
106197
106198
106199
106200
106201
106202
106203
106204
106205
106206
106207
106208
106209
106210
106211
106212
106213
106214
106215
106216
106217
106218
106219
106220
106221
106222
106223
106224
106225
......
106227
106228
106229
106230
106231
106232
106233

106234
106235
106236
106237
106238
106239
106240
106241
106242
106243
106244
106245
106246
106247
106248
106249
106250
106251
106252
106253
106254
106255
106256
106257
106258
106259
106260
106261
106262
106263
106264
106265
106266
106267
106268
106269
106270
106271
106272
106273
106274
106275
106276
106277
106278
106279
106280
106281
106282
106283
106284
106285
106286
106287
106288
106289
106290
106291
106292
106293
106294
106295
106296
106297
106298
106299
106300
106301
106302
106303
106304
106305
106306
106307
106308
106309
106310
106311
106312
106313
106314
106315
106316
106317
106318
106319
106320
106321
106322
......
106338
106339
106340
106341
106342
106343
106344

106345
106346

106347
106348
106349
106350
106351
106352
106353
106354
106355
106356
106357
106358

106359
106360
106361
106362
106363
106364
106365






106366

106367
106368
106369
106370
106371
106372
106373


106374
106375
106376
106377
106378
106379
106380
106381
106382
106383
106384
106385
106386
106387
106388
106389
106390
106391
106392
106393
106394
106395
106396
106397
106398
106399
106400
106401
106402
106403
106404
106405
106406
106407
106408
106409
106410
106411
106412
106413
106414


106415
106416
106417
106418
106419
106420
106421
106422
106423
106424
106425
106426
106427
106428
106429
106430
106431
106432
106433
106434
106435
106436
106437
106438
106439
106440
106441
106442
106443
106444
106445
106446
106447

106448
106449
106450
106451
106452
106453
106454
106455
106456
106457
106458
106459
106460
106461
106462
......
106467
106468
106469
106470
106471
106472
106473
106474
106475
106476
106477
106478

106479
106480
106481
106482
106483
106484
106485
106486
106487
106488
106489
106490
106491
106492
106493
106494
106495
106496
......
106518
106519
106520
106521
106522
106523
106524
106525
106526
106527
106528
106529
106530
106531
106532
......
106574
106575
106576
106577
106578
106579
106580
106581
106582
106583
106584
106585
106586
106587
106588
106589
......
106590
106591
106592
106593
106594
106595
106596
106597
106598
106599
106600
106601
106602
106603
106604
......
106616
106617
106618
106619
106620
106621
106622

106623
106624
106625
106626
106627
106628
106629
106630
106631
106632
106633
106634
106635
106636
106637
106638
106639
106640
106641
106642
106643
106644
106645
106646
106647
106648
106649
106650
106651
106652
106653
106654
106655
106656
106657
106658
106659
106660
106661
106662
106663
106664
106665
106666
106667
106668
106669
106670
106671
106672
106673
106674
106675
106676
106677
106678
106679
106680
106681
106682
106683
106684
106685
106686
106687
106688
106689
106690
106691
106692
106693
106694
106695
106696
106697
106698
106699
106700
106701
106702
106703
106704
106705
106706
106707
106708
106709
106710
106711
106712
106713
106714
106715
106716
106717
106718
106719
106720
106721
106722
106723
106724
106725
106726
106727
106728
106729
106730
106731
106732
106733
106734
106735
106736
106737
106738
106739
106740
106741
106742
106743
106744
106745
106746
106747
106748
106749
106750
106751
106752
106753
106754
106755
106756
106757
106758
106759
106760
106761
106762
106763
106764
106765
106766
106767
106768
106769
106770
106771
106772
106773
106774
106775
106776
106777
106778
106779
106780
106781
106782
106783
106784
106785
106786
106787
106788
106789
106790
106791
106792
106793
106794
106795
106796
106797
106798
106799
106800
106801
106802
106803
106804
106805
106806
106807
106808
106809
106810
106811
106812
106813
106814
106815
106816
106817
106818
106819
106820
106821
106822
106823
106824
106825
106826
106827
106828
106829
106830
......
106903
106904
106905
106906
106907
106908
106909
106910


106911
106912
106913
106914
106915
106916
106917
106918
106919
......
107006
107007
107008
107009
107010
107011
107012
107013
107014
107015
107016
107017
107018
107019
107020
......
107058
107059
107060
107061
107062
107063
107064
107065
107066
107067
107068
107069
107070
107071
107072
107073
107074
107075
107076
107077
107078
......
107096
107097
107098
107099
107100
107101
107102
107103
107104
107105
107106
107107
107108
107109
107110
107111
107112
107113
107114
107115
107116
107117
107118
107119


107120


107121


107122
107123
107124
107125
107126
107127
107128
......
107140
107141
107142
107143
107144
107145
107146
107147
107148
107149
107150
107151
107152
107153
107154
......
107159
107160
107161
107162
107163
107164
107165
107166
107167
107168
107169
107170
107171
107172
107173
......
107189
107190
107191
107192
107193
107194
107195
107196
107197
107198
107199
107200
107201
107202
107203
107204
107205
107206
107207
107208
107209
107210
107211
107212
107213
107214
107215
107216
107217
107218
107219
107220
107221
107222
107223
107224
107225
107226
107227
107228
107229
107230
107231
107232
107233
107234
107235
107236
107237
107238
107239
107240
107241
107242
107243
107244
107245
107246
107247
107248
107249
107250
107251
107252
107253
107254
107255
107256
107257
107258
107259
107260
107261
107262
107263
107264
107265
107266
107267
107268
107269
107270
107271
107272
107273
107274
107275
107276
107277
107278
107279
107280
107281
107282
107283
107284
107285
107286
107287
107288
107289
107290
107291
107292
107293
107294
107295
107296
107297
107298
107299
107300
107301
107302
107303
107304
107305
107306
107307
107308
107309
107310
107311
107312
107313
107314
107315
107316
107317
107318
107319
107320
107321
107322
107323
107324
107325
107326
107327
107328
107329
107330
107331
107332
107333
107334
107335
107336
107337
107338
107339
107340
107341
107342
107343
107344
107345
107346
107347
107348
107349
107350
107351
107352
107353
107354
107355
107356
107357
107358
107359
107360
107361
107362
107363
107364
107365
107366
107367
107368
107369
107370
107371
107372
107373
107374
107375
107376
107377
107378
107379
107380
107381
107382
107383
107384
107385
107386
107387
107388
107389
107390
107391
107392
107393
107394
107395
107396
107397
107398
107399
107400
107401
107402
107403
107404
107405
107406
107407
107408
107409
107410
107411
107412
107413
107414
107415
107416
107417
107418
107419
107420
107421
107422
107423
107424
107425
107426
107427
107428
107429
107430
107431
107432
107433
107434
107435
107436
107437
107438
107439
107440
107441
107442
107443
107444
107445
107446
107447
107448
107449
107450
107451
107452
107453
107454
107455
107456
107457
107458
107459
107460
107461
107462
107463
107464
107465
107466
107467
107468
107469
107470
107471
107472
107473
107474
107475
107476
107477
107478
107479
107480
107481
107482
107483
107484
107485
107486
107487
107488
107489
107490
107491
107492
107493
107494
107495
107496
107497
107498
107499
107500
107501
107502
107503
107504
107505
107506
107507
107508
107509
107510
107511
107512
107513
107514
107515
107516
107517
107518
107519
107520
107521
107522
107523
107524
107525
107526
107527
107528
107529
107530
107531
107532
107533
107534
107535
107536
107537
107538
107539
107540
107541
107542
107543
107544
107545
107546
107547
107548
107549
107550
107551
107552
107553
107554
107555
107556
107557
107558
107559
107560
107561
107562
107563
107564
107565
107566
107567
107568
107569
107570
107571
107572
107573
107574
107575
107576
107577
107578
107579
107580
107581
107582
107583
107584
107585
107586
107587
107588
107589
107590
107591
107592
107593
107594
107595
107596
107597
107598
107599
107600
107601
107602
107603
107604
107605
107606
107607
107608
107609
107610
107611
107612
107613
107614
107615
107616
107617
107618
107619
107620
107621
107622
107623
107624
107625
107626
107627
107628
107629
107630
107631
107632
107633
107634
107635
107636
107637
107638
107639
107640
107641
107642
107643
107644
107645
107646
107647
107648
107649
107650
107651
107652
107653
107654
107655
107656
107657
107658
107659
107660
107661
107662
107663
107664
107665
107666
107667
107668
107669
107670
107671
107672
107673
107674
107675
107676
107677
107678
107679
107680
107681
107682
107683
107684
107685
107686
107687
107688
107689
107690
107691
107692
107693
107694
107695
107696
107697
107698
107699
107700
107701
107702
107703
107704
107705
107706
107707
107708
107709
107710
107711
107712
107713
107714
107715
107716
107717
107718
107719
107720
107721
107722
107723
107724
107725
107726
107727
107728
107729
107730
107731
107732
107733
107734
107735
107736
107737
107738
107739
107740
107741
107742
107743
107744
107745
107746
107747
107748
107749
107750
107751
107752
107753
107754
107755
107756
107757
107758
107759
107760
107761
107762
107763
107764
107765
107766
107767
107768
107769
107770
107771
107772
107773
107774
107775
107776
107777
107778
107779
107780
107781
107782
107783
107784
107785
107786
107787
107788
107789
107790
107791
107792
107793
107794
107795
107796
107797
107798
107799
107800
107801
107802
107803
107804
107805
107806
107807
107808
107809
107810
107811
107812
107813
107814
107815
107816
107817
107818
107819
107820
107821
107822
107823
107824
107825
107826
107827
107828
107829
107830
107831
107832
107833
107834
107835
107836
107837
107838
107839
107840
107841
107842
107843
107844
107845
107846
107847
107848
107849
107850
107851
107852
107853
107854
107855
107856
107857
107858
107859
107860
107861
107862
107863
107864
107865
107866
107867
107868
107869
107870
107871
107872
107873
107874
107875
107876
107877
107878
107879
107880
107881
107882
107883
107884
107885
107886
107887
107888
107889
107890
107891
107892
107893
107894
107895
107896
107897
107898
107899
107900
107901
107902
107903
107904
107905
107906
107907
107908
107909
107910
107911
107912
107913
107914
107915
107916
107917
107918
107919
107920
107921
107922
107923
107924
107925
107926
107927
107928
107929
107930
107931
107932
107933
107934
107935
107936
107937
107938
107939
107940
107941
107942
107943
107944
107945
107946
107947
107948
107949
107950
107951
107952
107953
107954
107955
107956
107957
107958
107959
107960
107961
107962
107963
107964
107965
107966
107967
107968
107969
107970
107971
107972
107973
107974
107975
107976
107977
107978
107979
107980
107981
107982
107983
107984
107985
107986
107987
107988
107989
107990
107991
107992
107993
107994
107995
107996
107997
107998
107999
108000
108001
108002
108003
108004
108005
108006
108007
108008
108009
108010
108011
108012
108013
108014
108015
108016
108017
108018
108019
108020
108021
108022
108023
108024
108025
108026
108027
108028
108029
108030
108031
108032
108033
108034
108035
108036
108037
108038
108039
108040
108041
108042
108043
108044
108045
108046
108047
108048
108049
108050
108051
108052
108053
108054
108055
108056
108057
108058
108059
108060
108061
108062
108063
108064
108065
108066
108067
108068
108069
108070
108071
108072
108073
108074
108075
108076
108077
108078
108079
108080
108081
108082
108083
108084
108085
108086
108087
108088
108089
108090
108091
108092
108093
108094
108095
108096
......
108099
108100
108101
108102
108103
108104
108105
108106
108107
108108
108109
108110
108111
108112
108113
108114
108115
......
108181
108182
108183
108184
108185
108186
108187

108188
108189
108190
108191
108192
108193
108194
......
108198
108199
108200
108201
108202
108203
108204
108205
108206
108207

108208
108209
108210
108211
108212
108213
108214
108215
108216
108217
108218
108219
108220
108221
108222
108223
108224
108225

108226
108227
108228
108229
108230
108231
108232
......
108288
108289
108290
108291
108292
108293
108294
108295
108296
108297
108298
108299
108300
108301
108302
108303
108304

108305
108306
108307
108308
108309
108310
108311
108312




108313
108314
108315
108316
108317
108318
108319
108320
108321
108322
108323
108324
108325
108326
108327
108328
108329
108330
108331
108332
108333
108334
108335
108336
108337
108338
108339
108340
108341
108342
108343
108344
......
108398
108399
108400
108401
108402
108403
108404
108405
108406
108407
108408
108409
108410
108411
108412
108413
108414
108415
108416
108417
108418
108419
108420

108421
108422
108423
108424
108425
108426
108427
108428
108429
108430
108431
108432
108433
108434
108435
108436
......
108445
108446
108447
108448
108449
108450
108451
108452
108453
108454
108455
108456
108457
108458
108459


108460


108461
108462
108463
108464

108465
108466
108467
108468
108469
108470
108471
108472
108473
108474
108475
108476
108477
108478
108479
108480
108481
108482
108483
108484
108485
108486
108487
108488
108489
108490

108491
108492
108493
108494
108495
108496
108497
108498
108499
108500
108501
108502
108503
108504

108505
108506
108507
108508
108509
108510
108511
108512
108513
108514
108515
108516
108517
108518
108519
108520
......
108522
108523
108524
108525
108526
108527
108528
108529
108530
108531
108532
108533
108534
108535
108536
108537

108538
108539
108540

108541
108542
108543
108544
108545
108546
108547
108548
108549
108550
108551

108552

108553
108554
108555

108556
108557
108558
108559
108560
108561
108562
108563
108564
......
108587
108588
108589
108590
108591
108592
108593
108594
108595
108596
108597
108598
108599
108600
108601
108602
108603
108604
108605
108606
108607
108608
108609
108610
108611
108612
108613
108614


108615
108616
108617
108618
108619
108620
108621
108622
108623
108624
108625
108626
108627
108628

108629
108630

108631
108632
108633

108634
108635
108636
108637
108638
108639
108640
108641
108642
108643
108644
108645


108646
108647
108648
108649
108650

108651
108652

108653
108654
108655
108656
108657
108658
108659
108660
108661
108662
108663
108664
108665


108666
108667
108668
108669
108670
108671
108672
108673
108674
108675



108676
108677
108678
108679
108680
108681
108682
......
108691
108692
108693
108694
108695
108696
108697

108698
108699
108700
108701
108702
108703
108704
108705
108706
108707
108708
108709
108710
108711
108712
108713
108714

108715
108716
108717
108718
108719
108720
108721
108722
108723
108724
108725
108726
108727
108728
108729
108730
108731
108732
108733
108734
108735
108736
108737
108738
108739
108740
108741
108742
108743
108744
108745
108746
108747
108748
108749
108750
......
108782
108783
108784
108785
108786
108787
108788
108789
108790
108791
108792
108793
108794
108795
108796
108797
......
108799
108800
108801
108802
108803
108804
108805
108806
108807
108808
108809
108810
108811
108812
108813
108814
108815
108816
108817
108818
108819
108820
108821
108822
108823
108824
108825
108826
108827
108828
108829
108830
108831
108832
108833
108834
108835
108836

108837
108838
108839
108840
108841
108842
108843
108844
108845
108846
108847
108848
108849
108850
108851
108852
108853
108854
108855
108856
108857
108858
108859
108860
108861
108862
108863
108864
108865
108866
108867
108868
108869
108870
......
108881
108882
108883
108884
108885
108886
108887
108888
108889
108890
108891
108892
108893
108894
108895
......
108923
108924
108925
108926
108927
108928
108929
108930
108931
108932
108933
108934
108935
108936
108937
108938
108939
108940
......
108946
108947
108948
108949
108950
108951
108952
108953
108954
108955
108956
108957
108958
108959
108960
108961
108962
......
108967
108968
108969
108970
108971
108972
108973
108974
108975
108976
108977
108978
108979
108980
108981
108982
108983
108984
108985
108986
108987
108988
108989
108990
108991
108992
108993
108994
108995
108996
108997
108998
......
109037
109038
109039
109040
109041
109042
109043
109044
109045
109046
109047
109048
109049
109050
109051
......
109053
109054
109055
109056
109057
109058
109059
109060
109061
109062
109063
109064
109065
109066
109067
109068
109069
109070
......
109078
109079
109080
109081
109082
109083
109084
109085
109086
109087
109088
109089
109090
109091
109092
......
109103
109104
109105
109106
109107
109108
109109

109110
109111
109112
109113
109114
109115
109116
109117
109118
109119
109120
109121
......
109127
109128
109129
109130
109131
109132
109133
109134
109135
109136
109137
109138
109139
109140
109141
109142
109143
109144
109145
109146
109147
......
109162
109163
109164
109165
109166
109167
109168
109169
109170
109171
109172
109173
109174
109175
109176
109177
109178
109179
109180
109181
109182
109183
109184
109185
109186
109187
109188
109189
109190
109191
109192
109193
109194
109195
109196
109197
109198
109199
109200
109201
109202
109203
109204
109205
109206
109207
109208
109209
109210
109211
109212
109213
109214
109215
109216
109217
109218
109219
109220
109221
109222
109223
109224
109225
109226
109227
109228
109229
109230
109231
......
109244
109245
109246
109247
109248
109249
109250
109251
109252
109253
109254
109255
109256

109257
109258
109259
109260
109261
109262


109263


109264
109265
109266


109267
109268
109269
109270
109271
109272
109273
109274
109275
109276
109277
109278
109279
109280
109281
109282
109283
109284
109285
......
109288
109289
109290
109291
109292
109293
109294
109295
109296
109297
109298
109299
109300






































109301
109302
109303





109304








































109305
109306
109307
109308
























109309
109310
109311
109312



























































































































































































































































































































































































109313
109314





























































































































































































109315
109316










































































109317























































109318









109319

109320





109321

109322







































































































































































































































































109323
109324








































109325
109326



























































































































































































































































































































109327

109328
109329






109330
109331






























109332

109333
109334





















109335


























































109336
109337
109338
109339
109340
109341
109342
......
109405
109406
109407
109408
109409
109410
109411
109412

109413
109414
109415
109416
109417
109418
109419
109420
109421
109422
109423
109424
109425
109426
109427
109428
109429
109430
109431
109432
109433
109434
109435
109436
109437
109438
109439
109440
109441
109442
109443
109444
109445

109446
109447
109448
109449
109450








109451
109452
109453
109454
109455
109456
109457
......
109468
109469
109470
109471
109472
109473
109474
109475
109476
109477
109478
109479
109480
109481
109482
109483
109484
109485
109486
109487
109488
109489


109490
109491
109492
109493
109494

109495
109496
109497
109498
109499




109500
109501
109502
109503
109504
109505
109506
109507

109508
109509
109510
109511
109512
109513
109514
109515









109516
109517
109518
109519
109520
109521
109522
......
109545
109546
109547
109548
109549
109550
109551
109552
109553
109554
109555
109556
109557
109558
109559
109560
109561
109562
109563
109564
109565
109566
109567
109568
109569
109570
109571
109572
109573
109574
109575
109576
109577
109578
109579
109580
109581

109582
109583
109584
109585
109586
109587
109588
109589
109590
109591
109592
109593
109594
109595
109596



109597
109598
109599
109600
109601
109602
109603
109604
109605
109606
109607
109608
109609
109610
109611
109612
109613
109614
109615
109616
109617
109618
109619
109620
109621
109622
109623
109624
109625
109626
109627
109628
109629
109630
109631
109632
109633
109634
109635
109636
109637
109638
109639
109640
109641
109642
109643
109644
109645
109646
109647
109648
109649
109650
109651
109652
109653
109654
109655
109656
109657
109658
109659
109660








109661
109662
109663
109664
109665
109666
109667
109668
109669
109670
109671
109672
109673





109674
109675
109676
109677
109678










109679
109680
109681
109682
109683
109684
109685
109686
109687
109688
109689
109690
109691
109692
109693





109694
109695
109696
109697
109698
109699
109700
109701


109702
109703
109704


109705
109706
109707
109708
109709
109710
109711
109712
109713
109714
109715
109716
109717






109718




109719
109720
109721
109722
109723
109724
109725
109726
109727
109728
109729
109730
109731
109732
109733
109734
109735
109736
109737
109738
109739
109740
109741
109742
109743
109744
109745
109746
109747
109748
109749
109750
109751
109752



109753



109754
109755
109756
109757
109758
109759



109760
109761
109762
109763
109764
109765
109766
109767
109768
109769
109770
109771
109772
109773
109774
109775
109776
109777
109778
109779
109780
109781












109782
109783
109784
109785
109786
109787

109788
109789
109790







109791
109792
109793
109794
109795
109796
109797
109798
109799
109800
109801
109802



109803
109804
109805
109806
109807
109808
109809
109810
109811
109812
109813
109814
109815
109816
109817
109818

109819
109820
109821
109822
109823
109824
109825
109826
109827
109828
109829
109830
109831
109832
109833
109834
109835
109836
109837
109838
109839
109840
109841

109842
109843
109844
109845
109846
109847
109848
109849
109850
109851
109852
109853
109854
109855
109856
109857
109858
109859
109860

109861
109862
109863
109864
109865
109866
109867
109868
109869
109870
109871
109872
109873
109874
109875
109876
109877
109878
109879
109880
109881
109882
109883
109884
109885
109886
109887
109888
109889
109890
109891
109892
109893
109894
109895
109896
109897

109898
109899
109900
109901
109902
109903
109904
109905
109906
109907
109908
109909
109910
109911
109912
109913
109914
109915
109916
109917







109918

109919
109920
109921
109922
109923
109924
109925
109926
109927
109928
109929
109930
109931
109932
109933
109934
109935
109936
109937
109938
109939
109940
109941
109942
109943
109944
109945
109946
109947
109948
109949
109950
109951
109952
109953
109954
109955
109956
109957
109958
109959
109960
109961
109962
109963
109964
109965
109966
109967
109968
109969
109970
109971
109972
109973
109974
109975
109976
109977
109978
109979
109980
109981
109982
109983
109984
109985
......
109992
109993
109994
109995
109996
109997
109998

109999
110000
110001
110002
110003
110004
110005
110006

110007
110008
110009
110010
110011
110012
110013
110014
110015
110016
110017
110018
110019
......
110020
110021
110022
110023
110024
110025
110026
110027
110028
110029
110030
110031
110032
110033
110034
110035
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......
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......
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......
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......
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......
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......
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......
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......
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......
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......
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......
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......
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......
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......
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......
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......
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......
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......
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......
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......
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......
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......
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......
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......
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......
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......
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......
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......
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......
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......
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......
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119063












119064
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......
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......
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......
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120389








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......
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......
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......
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......
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......
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......
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120664

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......
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......
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......
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......
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......
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......
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......
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......
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......
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......
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......
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......
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......
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......
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......
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......
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......
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......
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140181



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/******************************************************************************
** This file is an amalgamation of many separate C source files from SQLite
** version 3.7.17.  By combining all the individual C code files into this 
** single large file, the entire code can be compiled as a single translation
** unit.  This allows many compilers to do optimizations that would not be
** possible if the files were compiled separately.  Performance improvements
** of 5% or more are commonly seen when SQLite is compiled as a single
** translation unit.
**
** This file is all you need to compile SQLite.  To use SQLite in other
................................................................................
# define SQLITE_PTR_TO_INT(X)  ((int)(X))
#endif

/*
** The SQLITE_THREADSAFE macro must be defined as 0, 1, or 2.
** 0 means mutexes are permanently disable and the library is never
** threadsafe.  1 means the library is serialized which is the highest
** level of threadsafety.  2 means the libary is multithreaded - multiple
** threads can use SQLite as long as no two threads try to use the same
** database connection at the same time.
**
** Older versions of SQLite used an optional THREADSAFE macro.
** We support that for legacy.
*/
#if !defined(SQLITE_THREADSAFE)
................................................................................
**     SQLITE_MEMDEBUG               // Debugging version of system malloc()
**
** On Windows, if the SQLITE_WIN32_MALLOC_VALIDATE macro is defined and the
** assert() macro is enabled, each call into the Win32 native heap subsystem
** will cause HeapValidate to be called.  If heap validation should fail, an
** assertion will be triggered.
**
** (Historical note:  There used to be several other options, but we've
** pared it down to just these three.)
**
** If none of the above are defined, then set SQLITE_SYSTEM_MALLOC as
** the default.
*/
#if defined(SQLITE_SYSTEM_MALLOC) \
  + defined(SQLITE_WIN32_MALLOC) \
  + defined(SQLITE_ZERO_MALLOC) \
  + defined(SQLITE_MEMDEBUG)>1
................................................................................
*/
#if !defined(SQLITE_MALLOC_SOFT_LIMIT)
# define SQLITE_MALLOC_SOFT_LIMIT 1024
#endif

/*
** We need to define _XOPEN_SOURCE as follows in order to enable
** recursive mutexes on most Unix systems.  But Mac OS X is different.
** The _XOPEN_SOURCE define causes problems for Mac OS X we are told,
** so it is omitted there.  See ticket #2673.
**
** Later we learn that _XOPEN_SOURCE is poorly or incorrectly
** implemented on some systems.  So we avoid defining it at all
** if it is already defined or if it is unneeded because we are
** not doing a threadsafe build.  Ticket #2681.
**
** See also ticket #2741.
*/
#if !defined(_XOPEN_SOURCE) && !defined(__DARWIN__) \
 && !defined(__APPLE__) && SQLITE_THREADSAFE
#  define _XOPEN_SOURCE 500  /* Needed to enable pthread recursive mutexes */
#endif

/*
** The TCL headers are only needed when compiling the TCL bindings.
*/
#if defined(SQLITE_TCL) || defined(TCLSH)
# include <tcl.h>
#endif

/*
** NDEBUG and SQLITE_DEBUG are opposites.  It should always be true that
** defined(NDEBUG)==!defined(SQLITE_DEBUG).  If this is not currently true,
** make it true by defining or undefining NDEBUG.
**
** Setting NDEBUG makes the code smaller and run faster by disabling the
** number assert() statements in the code.  So we want the default action
** to be for NDEBUG to be set and NDEBUG to be undefined only if SQLITE_DEBUG
** is set.  Thus NDEBUG becomes an opt-in rather than an opt-out
** feature.
*/
#if !defined(NDEBUG) && !defined(SQLITE_DEBUG) 
# define NDEBUG 1
#endif
................................................................................
** of SQLite to unexpected behavior - to make the code "self-healing"
** or "ductile" rather than being "brittle" and crashing at the first
** hint of unplanned behavior.
**
** In other words, ALWAYS and NEVER are added for defensive code.
**
** When doing coverage testing ALWAYS and NEVER are hard-coded to
** be true and false so that the unreachable code then specify will
** not be counted as untested code.
*/
#if defined(SQLITE_COVERAGE_TEST)
# define ALWAYS(X)      (1)
# define NEVER(X)       (0)
#elif !defined(NDEBUG)
# define ALWAYS(X)      ((X)?1:(assert(0),0))
................................................................................
** macros to verify that we have tested SQLite for large-file support.
*/
#define IS_BIG_INT(X)  (((X)&~(i64)0xffffffff)!=0)

/*
** The macro unlikely() is a hint that surrounds a boolean
** expression that is usually false.  Macro likely() surrounds
** a boolean expression that is usually true.  GCC is able to
** use these hints to generate better code, sometimes.

*/
#if defined(__GNUC__) && 0
# define likely(X)    __builtin_expect((X),1)
# define unlikely(X)  __builtin_expect((X),0)
#else
# define likely(X)    !!(X)
# define unlikely(X)  !!(X)
#endif

/************** Include sqlite3.h in the middle of sqliteInt.h ***************/
/************** Begin file sqlite3.h *****************************************/
/*
** 2001 September 15
**
** The author disclaims copyright to this source code.  In place of
................................................................................
** string contains the date and time of the check-in (UTC) and an SHA1
** hash of the entire source tree.
**
** See also: [sqlite3_libversion()],
** [sqlite3_libversion_number()], [sqlite3_sourceid()],
** [sqlite_version()] and [sqlite_source_id()].
*/
#define SQLITE_VERSION        "3.7.17"
#define SQLITE_VERSION_NUMBER 3007017
#define SQLITE_SOURCE_ID      "2013-05-20 00:56:22 118a3b35693b134d56ebd780123b7fd6f1497668"

/*
** CAPI3REF: Run-Time Library Version Numbers
** KEYWORDS: sqlite3_version, sqlite3_sourceid
**
** These interfaces provide the same information as the [SQLITE_VERSION],
** [SQLITE_VERSION_NUMBER], and [SQLITE_SOURCE_ID] C preprocessor macros
................................................................................
#define SQLITE_IOERR_SHMOPEN           (SQLITE_IOERR | (18<<8))
#define SQLITE_IOERR_SHMSIZE           (SQLITE_IOERR | (19<<8))
#define SQLITE_IOERR_SHMLOCK           (SQLITE_IOERR | (20<<8))
#define SQLITE_IOERR_SHMMAP            (SQLITE_IOERR | (21<<8))
#define SQLITE_IOERR_SEEK              (SQLITE_IOERR | (22<<8))
#define SQLITE_IOERR_DELETE_NOENT      (SQLITE_IOERR | (23<<8))
#define SQLITE_IOERR_MMAP              (SQLITE_IOERR | (24<<8))

#define SQLITE_LOCKED_SHAREDCACHE      (SQLITE_LOCKED |  (1<<8))
#define SQLITE_BUSY_RECOVERY           (SQLITE_BUSY   |  (1<<8))

#define SQLITE_CANTOPEN_NOTEMPDIR      (SQLITE_CANTOPEN | (1<<8))
#define SQLITE_CANTOPEN_ISDIR          (SQLITE_CANTOPEN | (2<<8))
#define SQLITE_CANTOPEN_FULLPATH       (SQLITE_CANTOPEN | (3<<8))
#define SQLITE_CORRUPT_VTAB            (SQLITE_CORRUPT | (1<<8))
#define SQLITE_READONLY_RECOVERY       (SQLITE_READONLY | (1<<8))
#define SQLITE_READONLY_CANTLOCK       (SQLITE_READONLY | (2<<8))
#define SQLITE_READONLY_ROLLBACK       (SQLITE_READONLY | (3<<8))
................................................................................
#define SQLITE_CONSTRAINT_NOTNULL      (SQLITE_CONSTRAINT | (5<<8))
#define SQLITE_CONSTRAINT_PRIMARYKEY   (SQLITE_CONSTRAINT | (6<<8))
#define SQLITE_CONSTRAINT_TRIGGER      (SQLITE_CONSTRAINT | (7<<8))
#define SQLITE_CONSTRAINT_UNIQUE       (SQLITE_CONSTRAINT | (8<<8))
#define SQLITE_CONSTRAINT_VTAB         (SQLITE_CONSTRAINT | (9<<8))
#define SQLITE_NOTICE_RECOVER_WAL      (SQLITE_NOTICE | (1<<8))
#define SQLITE_NOTICE_RECOVER_ROLLBACK (SQLITE_NOTICE | (2<<8))


/*
** CAPI3REF: Flags For File Open Operations
**
** These bit values are intended for use in the
** 3rd parameter to the [sqlite3_open_v2()] interface and
** in the 4th parameter to the [sqlite3_vfs.xOpen] method.
................................................................................
** ^The sqlite3_progress_handler(D,N,X,P) interface causes the callback
** function X to be invoked periodically during long running calls to
** [sqlite3_exec()], [sqlite3_step()] and [sqlite3_get_table()] for
** database connection D.  An example use for this
** interface is to keep a GUI updated during a large query.
**
** ^The parameter P is passed through as the only parameter to the 
** callback function X.  ^The parameter N is the number of 
** [virtual machine instructions] that are evaluated between successive
** invocations of the callback X.

**
** ^Only a single progress handler may be defined at one time per
** [database connection]; setting a new progress handler cancels the
** old one.  ^Setting parameter X to NULL disables the progress handler.
** ^The progress handler is also disabled by setting N to a value less
** than 1.
**
................................................................................
** registered the application defined function.
*/
SQLITE_API sqlite3 *sqlite3_context_db_handle(sqlite3_context*);

/*
** CAPI3REF: Function Auxiliary Data
**
** The following two functions may be used by scalar SQL functions to
** associate metadata with argument values. If the same value is passed to
** multiple invocations of the same SQL function during query execution, under
** some circumstances the associated metadata may be preserved. This may
** be used, for example, to add a regular-expression matching scalar
** function. The compiled version of the regular expression is stored as
** metadata associated with the SQL value passed as the regular expression

** pattern.  The compiled regular expression can be reused on multiple
** invocations of the same function so that the original pattern string
** does not need to be recompiled on each invocation.
**
** ^The sqlite3_get_auxdata() interface returns a pointer to the metadata
** associated by the sqlite3_set_auxdata() function with the Nth argument
** value to the application-defined function. ^If no metadata has been ever
** been set for the Nth argument of the function, or if the corresponding
** function parameter has changed since the meta-data was set,
** then sqlite3_get_auxdata() returns a NULL pointer.
**
** ^The sqlite3_set_auxdata() interface saves the metadata
** pointed to by its 3rd parameter as the metadata for the N-th
** argument of the application-defined function.  Subsequent
** calls to sqlite3_get_auxdata() might return this data, if it has


** not been destroyed.
** ^If it is not NULL, SQLite will invoke the destructor
** function given by the 4th parameter to sqlite3_set_auxdata() on

** the metadata when the corresponding function parameter changes
** or when the SQL statement completes, whichever comes first.





**
** SQLite is free to call the destructor and drop metadata on any
** parameter of any function at any time.  ^The only guarantee is that
** the destructor will be called before the metadata is dropped.






**
** ^(In practice, metadata is preserved between function calls for
** expressions that are constant at compile time. This includes literal

** values and [parameters].)^
**
** These routines must be called from the same thread in which
** the SQL function is running.
*/
SQLITE_API void *sqlite3_get_auxdata(sqlite3_context*, int N);
SQLITE_API void sqlite3_set_auxdata(sqlite3_context*, int N, void*, void (*)(void*));

................................................................................
** The code to implement this API is not available in the public release
** of SQLite.
*/
SQLITE_API int sqlite3_key(
  sqlite3 *db,                   /* Database to be rekeyed */
  const void *pKey, int nKey     /* The key */
);






/*
** Change the key on an open database.  If the current database is not
** encrypted, this routine will encrypt it.  If pNew==0 or nNew==0, the
** database is decrypted.
**
** The code to implement this API is not available in the public release
** of SQLite.
*/
SQLITE_API int sqlite3_rekey(
  sqlite3 *db,                   /* Database to be rekeyed */
  const void *pKey, int nKey     /* The new key */
);






/*
** Specify the activation key for a SEE database.  Unless 
** activated, none of the SEE routines will work.
*/
SQLITE_API void sqlite3_activate_see(
  const char *zPassPhrase        /* Activation phrase */
................................................................................
** xEntryPoint() returns an error, the [sqlite3_open()], [sqlite3_open16()],
** or [sqlite3_open_v2()] call that provoked the xEntryPoint() will fail.
**
** ^Calling sqlite3_auto_extension(X) with an entry point X that is already
** on the list of automatic extensions is a harmless no-op. ^No entry point
** will be called more than once for each database connection that is opened.
**
** See also: [sqlite3_reset_auto_extension()].

*/
SQLITE_API int sqlite3_auto_extension(void (*xEntryPoint)(void));













/*
** CAPI3REF: Reset Automatic Extension Loading
**
** ^This interface disables all automatic extensions previously
** registered using [sqlite3_auto_extension()].
*/
SQLITE_API void sqlite3_reset_auto_extension(void);
................................................................................
** wal file in wal mode databases, or the number of pages written to the
** database file in rollback mode databases. Any pages written as part of
** transaction rollback or database recovery operations are not included.
** If an IO or other error occurs while writing a page to disk, the effect
** on subsequent SQLITE_DBSTATUS_CACHE_WRITE requests is undefined.)^ ^The
** highwater mark associated with SQLITE_DBSTATUS_CACHE_WRITE is always 0.
** </dd>






** </dl>
*/
#define SQLITE_DBSTATUS_LOOKASIDE_USED       0
#define SQLITE_DBSTATUS_CACHE_USED           1
#define SQLITE_DBSTATUS_SCHEMA_USED          2
#define SQLITE_DBSTATUS_STMT_USED            3
#define SQLITE_DBSTATUS_LOOKASIDE_HIT        4
#define SQLITE_DBSTATUS_LOOKASIDE_MISS_SIZE  5
#define SQLITE_DBSTATUS_LOOKASIDE_MISS_FULL  6
#define SQLITE_DBSTATUS_CACHE_HIT            7
#define SQLITE_DBSTATUS_CACHE_MISS           8
#define SQLITE_DBSTATUS_CACHE_WRITE          9

#define SQLITE_DBSTATUS_MAX                  9   /* Largest defined DBSTATUS */


/*
** CAPI3REF: Prepared Statement Status
**
** ^(Each prepared statement maintains various
** [SQLITE_STMTSTATUS counters] that measure the number
................................................................................
**
** [[SQLITE_STMTSTATUS_AUTOINDEX]] <dt>SQLITE_STMTSTATUS_AUTOINDEX</dt>
** <dd>^This is the number of rows inserted into transient indices that
** were created automatically in order to help joins run faster.
** A non-zero value in this counter may indicate an opportunity to
** improvement performance by adding permanent indices that do not
** need to be reinitialized each time the statement is run.</dd>









** </dl>
*/
#define SQLITE_STMTSTATUS_FULLSCAN_STEP     1
#define SQLITE_STMTSTATUS_SORT              2
#define SQLITE_STMTSTATUS_AUTOINDEX         3


/*
** CAPI3REF: Custom Page Cache Object
**
** The sqlite3_pcache type is opaque.  It is implemented by
** the pluggable module.  The SQLite core has no knowledge of
** its size or internal structure and never deals with the
................................................................................
#ifdef SQLITE_OMIT_FLOATING_POINT
# undef double
#endif

#if 0
}  /* End of the 'extern "C"' block */
#endif
#endif

/*
** 2010 August 30
**
** The author disclaims copyright to this source code.  In place of
** a legal notice, here is a blessing:
**
................................................................................
** GCC does not define the offsetof() macro so we'll have to do it
** ourselves.
*/
#ifndef offsetof
#define offsetof(STRUCTURE,FIELD) ((int)((char*)&((STRUCTURE*)0)->FIELD))
#endif







/*
** Check to see if this machine uses EBCDIC.  (Yes, believe it or
** not, there are still machines out there that use EBCDIC.)
*/
#if 'A' == '\301'
# define SQLITE_EBCDIC 1
#else
................................................................................
typedef struct Trigger Trigger;
typedef struct TriggerPrg TriggerPrg;
typedef struct TriggerStep TriggerStep;
typedef struct UnpackedRecord UnpackedRecord;
typedef struct VTable VTable;
typedef struct VtabCtx VtabCtx;
typedef struct Walker Walker;
typedef struct WherePlan WherePlan;
typedef struct WhereInfo WhereInfo;
typedef struct WhereLevel WhereLevel;

/*
** Defer sourcing vdbe.h and btree.h until after the "u8" and 
** "BusyHandler" typedefs. vdbe.h also requires a few of the opaque
** pointer types (i.e. FuncDef) defined above.
*/
/************** Include btree.h in the middle of sqliteInt.h *****************/
................................................................................
#define BTREE_MEMORY        2  /* This is an in-memory DB */
#define BTREE_SINGLE        4  /* The file contains at most 1 b-tree */
#define BTREE_UNORDERED     8  /* Use of a hash implementation is OK */

SQLITE_PRIVATE int sqlite3BtreeClose(Btree*);
SQLITE_PRIVATE int sqlite3BtreeSetCacheSize(Btree*,int);
SQLITE_PRIVATE int sqlite3BtreeSetMmapLimit(Btree*,sqlite3_int64);
SQLITE_PRIVATE int sqlite3BtreeSetSafetyLevel(Btree*,int,int,int);
SQLITE_PRIVATE int sqlite3BtreeSyncDisabled(Btree*);
SQLITE_PRIVATE int sqlite3BtreeSetPageSize(Btree *p, int nPagesize, int nReserve, int eFix);
SQLITE_PRIVATE int sqlite3BtreeGetPageSize(Btree*);
SQLITE_PRIVATE int sqlite3BtreeMaxPageCount(Btree*,int);
SQLITE_PRIVATE u32 sqlite3BtreeLastPage(Btree*);
SQLITE_PRIVATE int sqlite3BtreeSecureDelete(Btree*,int);
SQLITE_PRIVATE int sqlite3BtreeGetReserve(Btree*);
................................................................................
*/
typedef struct Vdbe Vdbe;

/*
** The names of the following types declared in vdbeInt.h are required
** for the VdbeOp definition.
*/
typedef struct VdbeFunc VdbeFunc;
typedef struct Mem Mem;
typedef struct SubProgram SubProgram;

/*
** A single instruction of the virtual machine has an opcode
** and as many as three operands.  The instruction is recorded
** as an instance of the following structure:
................................................................................
  union {             /* fourth parameter */
    int i;                 /* Integer value if p4type==P4_INT32 */
    void *p;               /* Generic pointer */
    char *z;               /* Pointer to data for string (char array) types */
    i64 *pI64;             /* Used when p4type is P4_INT64 */
    double *pReal;         /* Used when p4type is P4_REAL */
    FuncDef *pFunc;        /* Used when p4type is P4_FUNCDEF */
    VdbeFunc *pVdbeFunc;   /* Used when p4type is P4_VDBEFUNC */
    CollSeq *pColl;        /* Used when p4type is P4_COLLSEQ */
    Mem *pMem;             /* Used when p4type is P4_MEM */
    VTable *pVtab;         /* Used when p4type is P4_VTAB */
    KeyInfo *pKeyInfo;     /* Used when p4type is P4_KEYINFO */
    int *ai;               /* Used when p4type is P4_INTARRAY */
    SubProgram *pProgram;  /* Used when p4type is P4_SUBPROGRAM */
    int (*xAdvance)(BtCursor *, int *);
................................................................................
*/
#define P4_NOTUSED    0   /* The P4 parameter is not used */
#define P4_DYNAMIC  (-1)  /* Pointer to a string obtained from sqliteMalloc() */
#define P4_STATIC   (-2)  /* Pointer to a static string */
#define P4_COLLSEQ  (-4)  /* P4 is a pointer to a CollSeq structure */
#define P4_FUNCDEF  (-5)  /* P4 is a pointer to a FuncDef structure */
#define P4_KEYINFO  (-6)  /* P4 is a pointer to a KeyInfo structure */
#define P4_VDBEFUNC (-7)  /* P4 is a pointer to a VdbeFunc structure */
#define P4_MEM      (-8)  /* P4 is a pointer to a Mem*    structure */
#define P4_TRANSIENT  0   /* P4 is a pointer to a transient string */
#define P4_VTAB     (-10) /* P4 is a pointer to an sqlite3_vtab structure */
#define P4_MPRINTF  (-11) /* P4 is a string obtained from sqlite3_mprintf() */
#define P4_REAL     (-12) /* P4 is a 64-bit floating point value */
#define P4_INT64    (-13) /* P4 is a 64-bit signed integer */
#define P4_INT32    (-14) /* P4 is a 32-bit signed integer */
................................................................................
** The makefile scans the vdbe.c source file and creates the "opcodes.h"
** header file that defines a number for each opcode used by the VDBE.
*/
/************** Include opcodes.h in the middle of vdbe.h ********************/
/************** Begin file opcodes.h *****************************************/
/* Automatically generated.  Do not edit */
/* See the mkopcodeh.awk script for details */













#define OP_Goto                                 1
#define OP_Gosub                                2
#define OP_Return                               3
#define OP_Yield                                4
#define OP_HaltIfNull                           5

#define OP_Halt                                 6
#define OP_Integer                              7
#define OP_Int64                                8
#define OP_Real                               130   /* same as TK_FLOAT    */
#define OP_String8                             94   /* same as TK_STRING   */
#define OP_String                               9
#define OP_Null                                10
#define OP_Blob                                11
#define OP_Variable                            12
#define OP_Move                                13
#define OP_Copy                                14
#define OP_SCopy                               15
#define OP_ResultRow                           16
#define OP_Concat                              91   /* same as TK_CONCAT   */
#define OP_Add                                 86   /* same as TK_PLUS     */
#define OP_Subtract                            87   /* same as TK_MINUS    */
#define OP_Multiply                            88   /* same as TK_STAR     */
#define OP_Divide                              89   /* same as TK_SLASH    */
#define OP_Remainder                           90   /* same as TK_REM      */
#define OP_CollSeq                             17
#define OP_Function                            18
#define OP_BitAnd                              82   /* same as TK_BITAND   */
#define OP_BitOr                               83   /* same as TK_BITOR    */
#define OP_ShiftLeft                           84   /* same as TK_LSHIFT   */
#define OP_ShiftRight                          85   /* same as TK_RSHIFT   */
#define OP_AddImm                              20
#define OP_MustBeInt                           21
#define OP_RealAffinity                        22
#define OP_ToText                             141   /* same as TK_TO_TEXT  */
#define OP_ToBlob                             142   /* same as TK_TO_BLOB  */
#define OP_ToNumeric                          143   /* same as TK_TO_NUMERIC*/
#define OP_ToInt                              144   /* same as TK_TO_INT   */
#define OP_ToReal                             145   /* same as TK_TO_REAL  */
#define OP_Eq                                  76   /* same as TK_EQ       */
#define OP_Ne                                  75   /* same as TK_NE       */
#define OP_Lt                                  79   /* same as TK_LT       */
#define OP_Le                                  78   /* same as TK_LE       */
#define OP_Gt                                  77   /* same as TK_GT       */
#define OP_Ge                                  80   /* same as TK_GE       */
#define OP_Permutation                         23
#define OP_Compare                             24
#define OP_Jump                                25
#define OP_And                                 69   /* same as TK_AND      */
#define OP_Or                                  68   /* same as TK_OR       */
#define OP_Not                                 19   /* same as TK_NOT      */
#define OP_BitNot                              93   /* same as TK_BITNOT   */
#define OP_Once                                26
#define OP_If                                  27
#define OP_IfNot                               28
#define OP_IsNull                              73   /* same as TK_ISNULL   */
#define OP_NotNull                             74   /* same as TK_NOTNULL  */
#define OP_Column                              29
#define OP_Affinity                            30
#define OP_MakeRecord                          31
#define OP_Count                               32
#define OP_Savepoint                           33
#define OP_AutoCommit                          34
#define OP_Transaction                         35
#define OP_ReadCookie                          36
#define OP_SetCookie                           37
#define OP_VerifyCookie                        38
#define OP_OpenRead                            39
#define OP_OpenWrite                           40
#define OP_OpenAutoindex                       41
#define OP_OpenEphemeral                       42
#define OP_SorterOpen                          43
#define OP_OpenPseudo                          44
#define OP_Close                               45
#define OP_SeekLt                              46
#define OP_SeekLe                              47
#define OP_SeekGe                              48
#define OP_SeekGt                              49
#define OP_Seek                                50
#define OP_NotFound                            51
#define OP_Found                               52
#define OP_IsUnique                            53
#define OP_NotExists                           54
#define OP_Sequence                            55
#define OP_NewRowid                            56
#define OP_Insert                              57
#define OP_InsertInt                           58


#define OP_Delete                              59
#define OP_ResetCount                          60
#define OP_SorterCompare                       61








#define OP_SorterData                          62










#define OP_RowKey                              63


#define OP_RowData                             64
#define OP_Rowid                               65
#define OP_NullRow                             66
#define OP_Last                                67
#define OP_SorterSort                          70
#define OP_Sort                                71
#define OP_Rewind                              72
#define OP_SorterNext                          81
#define OP_Prev                                92
#define OP_Next                                95
#define OP_SorterInsert                        96
#define OP_IdxInsert                           97
#define OP_IdxDelete                           98
#define OP_IdxRowid                            99
#define OP_IdxLT                              100
#define OP_IdxGE                              101
#define OP_Destroy                            102
#define OP_Clear                              103
#define OP_CreateIndex                        104
#define OP_CreateTable                        105
#define OP_ParseSchema                        106
#define OP_LoadAnalysis                       107
#define OP_DropTable                          108
#define OP_DropIndex                          109
#define OP_DropTrigger                        110
#define OP_IntegrityCk                        111
#define OP_RowSetAdd                          112
#define OP_RowSetRead                         113
#define OP_RowSetTest                         114
#define OP_Program                            115
#define OP_Param                              116
#define OP_FkCounter                          117
#define OP_FkIfZero                           118
#define OP_MemMax                             119
#define OP_IfPos                              120
#define OP_IfNeg                              121
#define OP_IfZero                             122
#define OP_AggStep                            123
#define OP_AggFinal                           124
#define OP_Checkpoint                         125
#define OP_JournalMode                        126
#define OP_Vacuum                             127

#define OP_IncrVacuum                         128
#define OP_Expire                             129
#define OP_TableLock                          131
#define OP_VBegin                             132
#define OP_VCreate                            133
#define OP_VDestroy                           134
#define OP_VOpen                              135
#define OP_VFilter                            136
#define OP_VColumn                            137
#define OP_VNext                              138
#define OP_VRename                            139




#define OP_VUpdate                            140
#define OP_Pagecount                          146
#define OP_MaxPgcnt                           147
#define OP_Trace                              148
#define OP_Noop                               149
#define OP_Explain                            150


................................................................................
#define OPFLG_OUT2_PRERELEASE 0x0002  /* out2-prerelease: */
#define OPFLG_IN1             0x0004  /* in1:   P1 is an input */
#define OPFLG_IN2             0x0008  /* in2:   P2 is an input */
#define OPFLG_IN3             0x0010  /* in3:   P3 is an input */
#define OPFLG_OUT2            0x0020  /* out2:  P2 is an output */
#define OPFLG_OUT3            0x0040  /* out3:  P3 is an output */
#define OPFLG_INITIALIZER {\
/*   0 */ 0x00, 0x01, 0x01, 0x04, 0x04, 0x10, 0x00, 0x02,\


/*   8 */ 0x02, 0x02, 0x02, 0x02, 0x02, 0x00, 0x00, 0x24,\
/*  16 */ 0x00, 0x00, 0x00, 0x24, 0x04, 0x05, 0x04, 0x00,\
/*  24 */ 0x00, 0x01, 0x01, 0x05, 0x05, 0x00, 0x00, 0x00,\
/*  32 */ 0x02, 0x00, 0x00, 0x00, 0x02, 0x10, 0x00, 0x00,\
/*  40 */ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x11, 0x11,\
/*  48 */ 0x11, 0x11, 0x08, 0x11, 0x11, 0x11, 0x11, 0x02,\
/*  56 */ 0x02, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,\
/*  64 */ 0x00, 0x02, 0x00, 0x01, 0x4c, 0x4c, 0x01, 0x01,\
/*  72 */ 0x01, 0x05, 0x05, 0x15, 0x15, 0x15, 0x15, 0x15,\
/*  80 */ 0x15, 0x01, 0x4c, 0x4c, 0x4c, 0x4c, 0x4c, 0x4c,\
/*  88 */ 0x4c, 0x4c, 0x4c, 0x4c, 0x01, 0x24, 0x02, 0x01,\

/*  96 */ 0x08, 0x08, 0x00, 0x02, 0x01, 0x01, 0x02, 0x00,\
/* 104 */ 0x02, 0x02, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,\
/* 112 */ 0x0c, 0x45, 0x15, 0x01, 0x02, 0x00, 0x01, 0x08,\
/* 120 */ 0x05, 0x05, 0x05, 0x00, 0x00, 0x00, 0x02, 0x00,\
/* 128 */ 0x01, 0x00, 0x02, 0x00, 0x00, 0x00, 0x00, 0x00,\
/* 136 */ 0x01, 0x00, 0x01, 0x00, 0x00, 0x04, 0x04, 0x04,\
/* 144 */ 0x04, 0x04, 0x02, 0x02, 0x00, 0x00, 0x00,}

/************** End of opcodes.h *********************************************/
/************** Continuing where we left off in vdbe.h ***********************/

/*
** Prototypes for the VDBE interface.  See comments on the implementation
................................................................................
SQLITE_PRIVATE void sqlite3VdbeSetNumCols(Vdbe*,int);
SQLITE_PRIVATE int sqlite3VdbeSetColName(Vdbe*, int, int, const char *, void(*)(void*));
SQLITE_PRIVATE void sqlite3VdbeCountChanges(Vdbe*);
SQLITE_PRIVATE sqlite3 *sqlite3VdbeDb(Vdbe*);
SQLITE_PRIVATE void sqlite3VdbeSetSql(Vdbe*, const char *z, int n, int);
SQLITE_PRIVATE void sqlite3VdbeSwap(Vdbe*,Vdbe*);
SQLITE_PRIVATE VdbeOp *sqlite3VdbeTakeOpArray(Vdbe*, int*, int*);
SQLITE_PRIVATE sqlite3_value *sqlite3VdbeGetValue(Vdbe*, int, u8);
SQLITE_PRIVATE void sqlite3VdbeSetVarmask(Vdbe*, int);
#ifndef SQLITE_OMIT_TRACE
SQLITE_PRIVATE   char *sqlite3VdbeExpandSql(Vdbe*, const char*);
#endif

SQLITE_PRIVATE void sqlite3VdbeRecordUnpack(KeyInfo*,int,const void*,UnpackedRecord*);
SQLITE_PRIVATE int sqlite3VdbeRecordCompare(int,const void*,UnpackedRecord*);
................................................................................
#define PAGER_JOURNALMODE_TRUNCATE    3   /* Commit by truncating journal */
#define PAGER_JOURNALMODE_MEMORY      4   /* In-memory journal file */
#define PAGER_JOURNALMODE_WAL         5   /* Use write-ahead logging */

/*
** Flags that make up the mask passed to sqlite3PagerAcquire().
*/
#define PAGER_ACQUIRE_NOCONTENT     0x01  /* Do not load data from disk */
#define PAGER_ACQUIRE_READONLY      0x02  /* Read-only page is acceptable */













/*
** The remainder of this file contains the declarations of the functions
** that make up the Pager sub-system API. See source code comments for 
** a detailed description of each routine.
*/

................................................................................
/* Functions used to configure a Pager object. */
SQLITE_PRIVATE void sqlite3PagerSetBusyhandler(Pager*, int(*)(void *), void *);
SQLITE_PRIVATE int sqlite3PagerSetPagesize(Pager*, u32*, int);
SQLITE_PRIVATE int sqlite3PagerMaxPageCount(Pager*, int);
SQLITE_PRIVATE void sqlite3PagerSetCachesize(Pager*, int);
SQLITE_PRIVATE void sqlite3PagerSetMmapLimit(Pager *, sqlite3_int64);
SQLITE_PRIVATE void sqlite3PagerShrink(Pager*);
SQLITE_PRIVATE void sqlite3PagerSetSafetyLevel(Pager*,int,int,int);
SQLITE_PRIVATE int sqlite3PagerLockingMode(Pager *, int);
SQLITE_PRIVATE int sqlite3PagerSetJournalMode(Pager *, int);
SQLITE_PRIVATE int sqlite3PagerGetJournalMode(Pager*);
SQLITE_PRIVATE int sqlite3PagerOkToChangeJournalMode(Pager*);
SQLITE_PRIVATE i64 sqlite3PagerJournalSizeLimit(Pager *, i64);
SQLITE_PRIVATE sqlite3_backup **sqlite3PagerBackupPtr(Pager*);

................................................................................
** in the sqlite.aDb[] array.  aDb[0] is the main database file and
** aDb[1] is the database file used to hold temporary tables.  Additional
** databases may be attached.
*/
struct Db {
  char *zName;         /* Name of this database */
  Btree *pBt;          /* The B*Tree structure for this database file */
  u8 inTrans;          /* 0: not writable.  1: Transaction.  2: Checkpoint */
  u8 safety_level;     /* How aggressive at syncing data to disk */
  Schema *pSchema;     /* Pointer to database schema (possibly shared) */
};

/*
** An instance of the following structure stores a database schema.
**
................................................................................
  int aLimit[SQLITE_N_LIMIT];   /* Limits */
  struct sqlite3InitInfo {      /* Information used during initialization */
    int newTnum;                /* Rootpage of table being initialized */
    u8 iDb;                     /* Which db file is being initialized */
    u8 busy;                    /* TRUE if currently initializing */
    u8 orphanTrigger;           /* Last statement is orphaned TEMP trigger */
  } init;
  int activeVdbeCnt;            /* Number of VDBEs currently executing */
  int writeVdbeCnt;             /* Number of active VDBEs that are writing */

  int vdbeExecCnt;              /* Number of nested calls to VdbeExec() */
  int nExtension;               /* Number of loaded extensions */
  void **aExtension;            /* Array of shared library handles */
  void (*xTrace)(void*,const char*);        /* Trace function */
  void *pTraceArg;                          /* Argument to the trace function */
  void (*xProfile)(void*,const char*,u64);  /* Profiling function */
  void *pProfileArg;                        /* Argument to profile function */
  void *pCommitArg;                 /* Argument to xCommitCallback() */   
................................................................................
  int (*xAuth)(void*,int,const char*,const char*,const char*,const char*);
                                /* Access authorization function */
  void *pAuthArg;               /* 1st argument to the access auth function */
#endif
#ifndef SQLITE_OMIT_PROGRESS_CALLBACK
  int (*xProgress)(void *);     /* The progress callback */
  void *pProgressArg;           /* Argument to the progress callback */
  int nProgressOps;             /* Number of opcodes for progress callback */
#endif
#ifndef SQLITE_OMIT_VIRTUALTABLE
  int nVTrans;                  /* Allocated size of aVTrans */
  Hash aModule;                 /* populated by sqlite3_create_module() */
  VtabCtx *pVtabCtx;            /* Context for active vtab connect/create */
  VTable **aVTrans;             /* Virtual tables with open transactions */
  VTable *pDisconnect;    /* Disconnect these in next sqlite3_prepare() */
................................................................................
  BusyHandler busyHandler;      /* Busy callback */
  Db aDbStatic[2];              /* Static space for the 2 default backends */
  Savepoint *pSavepoint;        /* List of active savepoints */
  int busyTimeout;              /* Busy handler timeout, in msec */
  int nSavepoint;               /* Number of non-transaction savepoints */
  int nStatement;               /* Number of nested statement-transactions  */
  i64 nDeferredCons;            /* Net deferred constraints this transaction. */

  int *pnBytesFreed;            /* If not NULL, increment this in DbFree() */

#ifdef SQLITE_ENABLE_UNLOCK_NOTIFY
  /* The following variables are all protected by the STATIC_MASTER 
  ** mutex, not by sqlite3.mutex. They are used by code in notify.c. 
  **
  ** When X.pUnlockConnection==Y, that means that X is waiting for Y to
................................................................................
#define ENC(db) ((db)->aDb[0].pSchema->enc)

/*
** Possible values for the sqlite3.flags.
*/
#define SQLITE_VdbeTrace      0x00000001  /* True to trace VDBE execution */
#define SQLITE_InternChanges  0x00000002  /* Uncommitted Hash table changes */



#define SQLITE_FullColNames   0x00000004  /* Show full column names on SELECT */
#define SQLITE_ShortColNames  0x00000008  /* Show short columns names */
#define SQLITE_CountRows      0x00000010  /* Count rows changed by INSERT, */
                                          /*   DELETE, or UPDATE and return */
                                          /*   the count using a callback. */
#define SQLITE_NullCallback   0x00000020  /* Invoke the callback once if the */
                                          /*   result set is empty */
#define SQLITE_SqlTrace       0x00000040  /* Debug print SQL as it executes */
#define SQLITE_VdbeListing    0x00000080  /* Debug listings of VDBE programs */
#define SQLITE_WriteSchema    0x00000100  /* OK to update SQLITE_MASTER */
#define SQLITE_VdbeAddopTrace 0x00000200  /* Trace sqlite3VdbeAddOp() calls */
#define SQLITE_IgnoreChecks   0x00000400  /* Do not enforce check constraints */
#define SQLITE_ReadUncommitted 0x0000800  /* For shared-cache mode */
#define SQLITE_LegacyFileFmt  0x00001000  /* Create new databases in format 1 */
#define SQLITE_FullFSync      0x00002000  /* Use full fsync on the backend */
#define SQLITE_CkptFullFSync  0x00004000  /* Use full fsync for checkpoint */
#define SQLITE_RecoveryMode   0x00008000  /* Ignore schema errors */
#define SQLITE_ReverseOrder   0x00010000  /* Reverse unordered SELECTs */
#define SQLITE_RecTriggers    0x00020000  /* Enable recursive triggers */
#define SQLITE_ForeignKeys    0x00040000  /* Enforce foreign key constraints  */
#define SQLITE_AutoIndex      0x00080000  /* Enable automatic indexes */
#define SQLITE_PreferBuiltin  0x00100000  /* Preference to built-in funcs */
#define SQLITE_LoadExtension  0x00200000  /* Enable load_extension */
#define SQLITE_EnableTrigger  0x00400000  /* True to enable triggers */




/*
** Bits of the sqlite3.dbOptFlags field that are used by the
** sqlite3_test_control(SQLITE_TESTCTRL_OPTIMIZATIONS,...) interface to
** selectively disable various optimizations.
*/
#define SQLITE_QueryFlattener 0x0001   /* Query flattening */
................................................................................
#define SQLITE_FactorOutConst 0x0008   /* Constant factoring */
#define SQLITE_IdxRealAsInt   0x0010   /* Store REAL as INT in indices */
#define SQLITE_DistinctOpt    0x0020   /* DISTINCT using indexes */
#define SQLITE_CoverIdxScan   0x0040   /* Covering index scans */
#define SQLITE_OrderByIdxJoin 0x0080   /* ORDER BY of joins via index */
#define SQLITE_SubqCoroutine  0x0100   /* Evaluate subqueries as coroutines */
#define SQLITE_Transitive     0x0200   /* Transitive constraints */


#define SQLITE_AllOpts        0xffff   /* All optimizations */

/*
** Macros for testing whether or not optimizations are enabled or disabled.
*/
#ifndef SQLITE_OMIT_BUILTIN_TEST
#define OptimizationDisabled(db, mask)  (((db)->dbOptFlags&(mask))!=0)
................................................................................
** sqlite3.pSavepoint. The first element in the list is the most recently
** opened savepoint. Savepoints are added to the list by the vdbe
** OP_Savepoint instruction.
*/
struct Savepoint {
  char *zName;                        /* Savepoint name (nul-terminated) */
  i64 nDeferredCons;                  /* Number of deferred fk violations */

  Savepoint *pNext;                   /* Parent savepoint (if any) */
};

/*
** The following are used as the second parameter to sqlite3Savepoint(),
** and as the P1 argument to the OP_Savepoint instruction.
*/
................................................................................
#define OE_Default  99  /* Do whatever the default action is */


/*
** An instance of the following structure is passed as the first
** argument to sqlite3VdbeKeyCompare and is used to control the 
** comparison of the two index keys.




*/
struct KeyInfo {
  sqlite3 *db;        /* The database connection */
  u8 enc;             /* Text encoding - one of the SQLITE_UTF* values */
  u16 nField;         /* Number of entries in aColl[] */
  u8 *aSortOrder;     /* Sort order for each column.  May be NULL */
  CollSeq *aColl[1];  /* Collating sequence for each term of the key */
};

/*
** An instance of the following structure holds information about a
** single index record that has already been parsed out into individual
** values.
................................................................................
  tRowcnt *aiRowEst;       /* From ANALYZE: Est. rows selected by each column */
  Table *pTable;           /* The SQL table being indexed */
  char *zColAff;           /* String defining the affinity of each column */
  Index *pNext;            /* The next index associated with the same table */
  Schema *pSchema;         /* Schema containing this index */
  u8 *aSortOrder;          /* for each column: True==DESC, False==ASC */
  char **azColl;           /* Array of collation sequence names for index */

  int tnum;                /* DB Page containing root of this index */
  u16 nColumn;             /* Number of columns in table used by this index */
  u8 onError;              /* OE_Abort, OE_Ignore, OE_Replace, or OE_None */
  unsigned autoIndex:2;    /* 1==UNIQUE, 2==PRIMARY KEY, 0==CREATE INDEX */
  unsigned bUnordered:1;   /* Use this index for == or IN queries only */

#ifdef SQLITE_ENABLE_STAT3
  int nSample;             /* Number of elements in aSample[] */
  tRowcnt avgEq;           /* Average nEq value for key values not in aSample */
  IndexSample *aSample;    /* Samples of the left-most key */
#endif
};

................................................................................
typedef u64 Bitmask;

/*
** The number of bits in a Bitmask.  "BMS" means "BitMask Size".
*/
#define BMS  ((int)(sizeof(Bitmask)*8))






/*
** The following structure describes the FROM clause of a SELECT statement.
** Each table or subquery in the FROM clause is a separate element of
** the SrcList.a[] array.
**
** With the addition of multiple database support, the following structure
** can also be used to describe a particular table such as the table that
................................................................................
** But sqlite3SrcListShiftJoinType() later shifts the jointypes so that each
** jointype expresses the join between the table and the previous table.
**
** In the colUsed field, the high-order bit (bit 63) is set if the table
** contains more than 63 columns and the 64-th or later column is used.
*/
struct SrcList {
  i16 nSrc;        /* Number of tables or subqueries in the FROM clause */
  i16 nAlloc;      /* Number of entries allocated in a[] below */
  struct SrcList_item {
    Schema *pSchema;  /* Schema to which this item is fixed */
    char *zDatabase;  /* Name of database holding this table */
    char *zName;      /* Name of the table */
    char *zAlias;     /* The "B" part of a "A AS B" phrase.  zName is the "A" */
    Table *pTab;      /* An SQL table corresponding to zName */
    Select *pSelect;  /* A SELECT statement used in place of a table name */
................................................................................
#define JT_NATURAL   0x0004    /* True for a "natural" join */
#define JT_LEFT      0x0008    /* Left outer join */
#define JT_RIGHT     0x0010    /* Right outer join */
#define JT_OUTER     0x0020    /* The "OUTER" keyword is present */
#define JT_ERROR     0x0040    /* unknown or unsupported join type */


/*
** A WherePlan object holds information that describes a lookup
** strategy.
**
** This object is intended to be opaque outside of the where.c module.
** It is included here only so that that compiler will know how big it
** is.  None of the fields in this object should be used outside of
** the where.c module.
**
** Within the union, pIdx is only used when wsFlags&WHERE_INDEXED is true.
** pTerm is only used when wsFlags&WHERE_MULTI_OR is true.  And pVtabIdx
** is only used when wsFlags&WHERE_VIRTUALTABLE is true.  It is never the
** case that more than one of these conditions is true.
*/
struct WherePlan {
  u32 wsFlags;                   /* WHERE_* flags that describe the strategy */
  u16 nEq;                       /* Number of == constraints */
  u16 nOBSat;                    /* Number of ORDER BY terms satisfied */
  double nRow;                   /* Estimated number of rows (for EQP) */
  union {
    Index *pIdx;                   /* Index when WHERE_INDEXED is true */
    struct WhereTerm *pTerm;       /* WHERE clause term for OR-search */
    sqlite3_index_info *pVtabIdx;  /* Virtual table index to use */
  } u;
};

/*
** For each nested loop in a WHERE clause implementation, the WhereInfo
** structure contains a single instance of this structure.  This structure
** is intended to be private to the where.c module and should not be
** access or modified by other modules.
**
** The pIdxInfo field is used to help pick the best index on a
** virtual table.  The pIdxInfo pointer contains indexing
** information for the i-th table in the FROM clause before reordering.
** All the pIdxInfo pointers are freed by whereInfoFree() in where.c.
** All other information in the i-th WhereLevel object for the i-th table
** after FROM clause ordering.
*/
struct WhereLevel {
  WherePlan plan;       /* query plan for this element of the FROM clause */
  int iLeftJoin;        /* Memory cell used to implement LEFT OUTER JOIN */
  int iTabCur;          /* The VDBE cursor used to access the table */
  int iIdxCur;          /* The VDBE cursor used to access pIdx */
  int addrBrk;          /* Jump here to break out of the loop */
  int addrNxt;          /* Jump here to start the next IN combination */
  int addrCont;         /* Jump here to continue with the next loop cycle */
  int addrFirst;        /* First instruction of interior of the loop */
  u8 iFrom;             /* Which entry in the FROM clause */
  u8 op, p5;            /* Opcode and P5 of the opcode that ends the loop */
  int p1, p2;           /* Operands of the opcode used to ends the loop */
  union {               /* Information that depends on plan.wsFlags */
    struct {
      int nIn;              /* Number of entries in aInLoop[] */
      struct InLoop {
        int iCur;              /* The VDBE cursor used by this IN operator */
        int addrInTop;         /* Top of the IN loop */
        u8 eEndLoopOp;         /* IN Loop terminator. OP_Next or OP_Prev */
      } *aInLoop;           /* Information about each nested IN operator */
    } in;                 /* Used when plan.wsFlags&WHERE_IN_ABLE */
    Index *pCovidx;       /* Possible covering index for WHERE_MULTI_OR */
  } u;
  double rOptCost;      /* "Optimal" cost for this level */

  /* The following field is really not part of the current level.  But
  ** we need a place to cache virtual table index information for each
  ** virtual table in the FROM clause and the WhereLevel structure is
  ** a convenient place since there is one WhereLevel for each FROM clause
  ** element.
  */
  sqlite3_index_info *pIdxInfo;  /* Index info for n-th source table */
};

/*
** Flags appropriate for the wctrlFlags parameter of sqlite3WhereBegin()
** and the WhereInfo.wctrlFlags member.
*/
#define WHERE_ORDERBY_NORMAL   0x0000 /* No-op */
#define WHERE_ORDERBY_MIN      0x0001 /* ORDER BY processing for min() func */
#define WHERE_ORDERBY_MAX      0x0002 /* ORDER BY processing for max() func */
#define WHERE_ONEPASS_DESIRED  0x0004 /* Want to do one-pass UPDATE/DELETE */
#define WHERE_DUPLICATES_OK    0x0008 /* Ok to return a row more than once */
#define WHERE_OMIT_OPEN_CLOSE  0x0010 /* Table cursors are already open */
#define WHERE_FORCE_TABLE      0x0020 /* Do not use an index-only search */
#define WHERE_ONETABLE_ONLY    0x0040 /* Only code the 1st table in pTabList */
#define WHERE_AND_ONLY         0x0080 /* Don't use indices for OR terms */




/*
** The WHERE clause processing routine has two halves.  The
** first part does the start of the WHERE loop and the second
** half does the tail of the WHERE loop.  An instance of
** this structure is returned by the first half and passed
** into the second half to give some continuity.
*/
struct WhereInfo {
  Parse *pParse;            /* Parsing and code generating context */
  SrcList *pTabList;        /* List of tables in the join */
  u16 nOBSat;               /* Number of ORDER BY terms satisfied by indices */
  u16 wctrlFlags;           /* Flags originally passed to sqlite3WhereBegin() */
  u8 okOnePass;             /* Ok to use one-pass algorithm for UPDATE/DELETE */
  u8 untestedTerms;         /* Not all WHERE terms resolved by outer loop */
  u8 eDistinct;             /* One of the WHERE_DISTINCT_* values below */
  int iTop;                 /* The very beginning of the WHERE loop */
  int iContinue;            /* Jump here to continue with next record */
  int iBreak;               /* Jump here to break out of the loop */
  int nLevel;               /* Number of nested loop */
  struct WhereClause *pWC;  /* Decomposition of the WHERE clause */
  double savedNQueryLoop;   /* pParse->nQueryLoop outside the WHERE loop */
  double nRowOut;           /* Estimated number of output rows */
  WhereLevel a[1];          /* Information about each nest loop in WHERE */
};

/* Allowed values for WhereInfo.eDistinct and DistinctCtx.eTnctType */
#define WHERE_DISTINCT_NOOP      0  /* DISTINCT keyword not used */
#define WHERE_DISTINCT_UNIQUE    1  /* No duplicates */
#define WHERE_DISTINCT_ORDERED   2  /* All duplicates are adjacent */
#define WHERE_DISTINCT_UNORDERED 3  /* Duplicates are scattered */

/*
** A NameContext defines a context in which to resolve table and column
................................................................................
** NameContext in the parent query.  Thus the process of scanning the
** NameContext list corresponds to searching through successively outer
** subqueries looking for a match.
*/
struct NameContext {
  Parse *pParse;       /* The parser */
  SrcList *pSrcList;   /* One or more tables used to resolve names */
  ExprList *pEList;    /* Optional list of named expressions */
  AggInfo *pAggInfo;   /* Information about aggregates at this level */
  NameContext *pNext;  /* Next outer name context.  NULL for outermost */
  int nRef;            /* Number of names resolved by this context */
  int nErr;            /* Number of errors encountered while resolving names */
  u8 ncFlags;          /* Zero or more NC_* flags defined below */
};

................................................................................
/*
** Allowed values for the NameContext, ncFlags field.
*/
#define NC_AllowAgg  0x01    /* Aggregate functions are allowed here */
#define NC_HasAgg    0x02    /* One or more aggregate functions seen */
#define NC_IsCheck   0x04    /* True if resolving names in a CHECK constraint */
#define NC_InAggFunc 0x08    /* True if analyzing arguments to an agg func */
#define NC_AsMaybe   0x10    /* Resolve to AS terms of the result set only
                             ** if no other resolution is available */

/*
** An instance of the following structure contains all information
** needed to generate code for a single SELECT statement.
**
** nLimit is set to -1 if there is no LIMIT clause.  nOffset is set to 0.
** If there is a LIMIT clause, the parser sets nLimit to the value of the
................................................................................
*/
struct Select {
  ExprList *pEList;      /* The fields of the result */
  u8 op;                 /* One of: TK_UNION TK_ALL TK_INTERSECT TK_EXCEPT */
  u16 selFlags;          /* Various SF_* values */
  int iLimit, iOffset;   /* Memory registers holding LIMIT & OFFSET counters */
  int addrOpenEphm[3];   /* OP_OpenEphem opcodes related to this select */
  double nSelectRow;     /* Estimated number of result rows */
  SrcList *pSrc;         /* The FROM clause */
  Expr *pWhere;          /* The WHERE clause */
  ExprList *pGroupBy;    /* The GROUP BY clause */
  Expr *pHaving;         /* The HAVING clause */
  ExprList *pOrderBy;    /* The ORDER BY clause */
  Select *pPrior;        /* Prior select in a compound select statement */
  Select *pNext;         /* Next select to the left in a compound */
................................................................................
#define SF_UsesEphemeral   0x0008  /* Uses the OpenEphemeral opcode */
#define SF_Expanded        0x0010  /* sqlite3SelectExpand() called on this */
#define SF_HasTypeInfo     0x0020  /* FROM subqueries have Table metadata */
#define SF_UseSorter       0x0040  /* Sort using a sorter */
#define SF_Values          0x0080  /* Synthesized from VALUES clause */
#define SF_Materialize     0x0100  /* Force materialization of views */
#define SF_NestedFrom      0x0200  /* Part of a parenthesized FROM clause */



/*
** The results of a select can be distributed in several ways.  The
** "SRT" prefix means "SELECT Result Type".
*/
#define SRT_Union        1  /* Store result as keys in an index */
................................................................................
  u8 nested;           /* Number of nested calls to the parser/code generator */
  u8 nTempReg;         /* Number of temporary registers in aTempReg[] */
  u8 nTempInUse;       /* Number of aTempReg[] currently checked out */
  u8 nColCache;        /* Number of entries in aColCache[] */
  u8 iColCache;        /* Next entry in aColCache[] to replace */
  u8 isMultiWrite;     /* True if statement may modify/insert multiple rows */
  u8 mayAbort;         /* True if statement may throw an ABORT exception */

  int aTempReg[8];     /* Holding area for temporary registers */
  int nRangeReg;       /* Size of the temporary register block */
  int iRangeReg;       /* First register in temporary register block */
  int nErr;            /* Number of errors seen */
  int nTab;            /* Number of previously allocated VDBE cursors */
  int nMem;            /* Number of memory cells used so far */
  int nSet;            /* Number of sets used so far */
  int nOnce;           /* Number of OP_Once instructions so far */
  int ckBase;          /* Base register of data during check constraints */

  int iCacheLevel;     /* ColCache valid when aColCache[].iLevel<=iCacheLevel */
  int iCacheCnt;       /* Counter used to generate aColCache[].lru values */
  struct yColCache {
    int iTable;           /* Table cursor number */
    int iColumn;          /* Table column number */
    u8 tempReg;           /* iReg is a temp register that needs to be freed */
    int iLevel;           /* Nesting level */
................................................................................
  TableLock *aTableLock; /* Required table locks for shared-cache mode */
#endif
  AutoincInfo *pAinc;  /* Information about AUTOINCREMENT counters */

  /* Information used while coding trigger programs. */
  Parse *pToplevel;    /* Parse structure for main program (or NULL) */
  Table *pTriggerTab;  /* Table triggers are being coded for */
  double nQueryLoop;   /* Estimated number of iterations of a query */
  u32 oldmask;         /* Mask of old.* columns referenced */
  u32 newmask;         /* Mask of new.* columns referenced */
  u8 eTriggerOp;       /* TK_UPDATE, TK_INSERT or TK_DELETE */
  u8 eOrconf;          /* Default ON CONFLICT policy for trigger steps */
  u8 disableTriggers;  /* True to disable triggers */

  /* Above is constant between recursions.  Below is reset before and after
................................................................................
struct StrAccum {
  sqlite3 *db;         /* Optional database for lookaside.  Can be NULL */
  char *zBase;         /* A base allocation.  Not from malloc. */
  char *zText;         /* The string collected so far */
  int  nChar;          /* Length of the string so far */
  int  nAlloc;         /* Amount of space allocated in zText */
  int  mxAlloc;        /* Maximum allowed string length */
  u8   mallocFailed;   /* Becomes true if any memory allocation fails */
  u8   useMalloc;      /* 0: none,  1: sqlite3DbMalloc,  2: sqlite3_malloc */
  u8   tooBig;         /* Becomes true if string size exceeds limits */

};



/*
** A pointer to this structure is used to communicate information
** from sqlite3Init and OP_ParseSchema into the sqlite3InitCallback.
*/
typedef struct {
  sqlite3 *db;        /* The database being initialized */
................................................................................
SQLITE_PRIVATE void sqlite3SrcListIndexedBy(Parse *, SrcList *, Token *);
SQLITE_PRIVATE int sqlite3IndexedByLookup(Parse *, struct SrcList_item *);
SQLITE_PRIVATE void sqlite3SrcListShiftJoinType(SrcList*);
SQLITE_PRIVATE void sqlite3SrcListAssignCursors(Parse*, SrcList*);
SQLITE_PRIVATE void sqlite3IdListDelete(sqlite3*, IdList*);
SQLITE_PRIVATE void sqlite3SrcListDelete(sqlite3*, SrcList*);
SQLITE_PRIVATE Index *sqlite3CreateIndex(Parse*,Token*,Token*,SrcList*,ExprList*,int,Token*,
                        Token*, int, int);
SQLITE_PRIVATE void sqlite3DropIndex(Parse*, SrcList*, int);
SQLITE_PRIVATE int sqlite3Select(Parse*, Select*, SelectDest*);
SQLITE_PRIVATE Select *sqlite3SelectNew(Parse*,ExprList*,SrcList*,Expr*,ExprList*,
                         Expr*,ExprList*,u16,Expr*,Expr*);
SQLITE_PRIVATE void sqlite3SelectDelete(sqlite3*, Select*);
SQLITE_PRIVATE Table *sqlite3SrcListLookup(Parse*, SrcList*);
SQLITE_PRIVATE int sqlite3IsReadOnly(Parse*, Table*, int);
................................................................................
#if defined(SQLITE_ENABLE_UPDATE_DELETE_LIMIT) && !defined(SQLITE_OMIT_SUBQUERY)
SQLITE_PRIVATE Expr *sqlite3LimitWhere(Parse*,SrcList*,Expr*,ExprList*,Expr*,Expr*,char*);
#endif
SQLITE_PRIVATE void sqlite3DeleteFrom(Parse*, SrcList*, Expr*);
SQLITE_PRIVATE void sqlite3Update(Parse*, SrcList*, ExprList*, Expr*, int);
SQLITE_PRIVATE WhereInfo *sqlite3WhereBegin(Parse*,SrcList*,Expr*,ExprList*,ExprList*,u16,int);
SQLITE_PRIVATE void sqlite3WhereEnd(WhereInfo*);






SQLITE_PRIVATE int sqlite3ExprCodeGetColumn(Parse*, Table*, int, int, int, u8);
SQLITE_PRIVATE void sqlite3ExprCodeGetColumnOfTable(Vdbe*, Table*, int, int, int);
SQLITE_PRIVATE void sqlite3ExprCodeMove(Parse*, int, int, int);
SQLITE_PRIVATE void sqlite3ExprCacheStore(Parse*, int, int, int);
SQLITE_PRIVATE void sqlite3ExprCachePush(Parse*);
SQLITE_PRIVATE void sqlite3ExprCachePop(Parse*, int);
SQLITE_PRIVATE void sqlite3ExprCacheRemove(Parse*, int, int);
................................................................................
SQLITE_PRIVATE Table *sqlite3LocateTableItem(Parse*,int isView,struct SrcList_item *);
SQLITE_PRIVATE Index *sqlite3FindIndex(sqlite3*,const char*, const char*);
SQLITE_PRIVATE void sqlite3UnlinkAndDeleteTable(sqlite3*,int,const char*);
SQLITE_PRIVATE void sqlite3UnlinkAndDeleteIndex(sqlite3*,int,const char*);
SQLITE_PRIVATE void sqlite3Vacuum(Parse*);
SQLITE_PRIVATE int sqlite3RunVacuum(char**, sqlite3*);
SQLITE_PRIVATE char *sqlite3NameFromToken(sqlite3*, Token*);
SQLITE_PRIVATE int sqlite3ExprCompare(Expr*, Expr*);
SQLITE_PRIVATE int sqlite3ExprListCompare(ExprList*, ExprList*);

SQLITE_PRIVATE void sqlite3ExprAnalyzeAggregates(NameContext*, Expr*);
SQLITE_PRIVATE void sqlite3ExprAnalyzeAggList(NameContext*,ExprList*);
SQLITE_PRIVATE int sqlite3FunctionUsesThisSrc(Expr*, SrcList*);
SQLITE_PRIVATE Vdbe *sqlite3GetVdbe(Parse*);
SQLITE_PRIVATE void sqlite3PrngSaveState(void);
SQLITE_PRIVATE void sqlite3PrngRestoreState(void);
SQLITE_PRIVATE void sqlite3PrngResetState(void);
................................................................................
SQLITE_PRIVATE int sqlite3ExprIsInteger(Expr*, int*);
SQLITE_PRIVATE int sqlite3ExprCanBeNull(const Expr*);
SQLITE_PRIVATE void sqlite3ExprCodeIsNullJump(Vdbe*, const Expr*, int, int);
SQLITE_PRIVATE int sqlite3ExprNeedsNoAffinityChange(const Expr*, char);
SQLITE_PRIVATE int sqlite3IsRowid(const char*);
SQLITE_PRIVATE void sqlite3GenerateRowDelete(Parse*, Table*, int, int, int, Trigger *, int);
SQLITE_PRIVATE void sqlite3GenerateRowIndexDelete(Parse*, Table*, int, int*);
SQLITE_PRIVATE int sqlite3GenerateIndexKey(Parse*, Index*, int, int, int);
SQLITE_PRIVATE void sqlite3GenerateConstraintChecks(Parse*,Table*,int,int,
                                     int*,int,int,int,int,int*);
SQLITE_PRIVATE void sqlite3CompleteInsertion(Parse*, Table*, int, int, int*, int, int, int);
SQLITE_PRIVATE int sqlite3OpenTableAndIndices(Parse*, Table*, int, int);
SQLITE_PRIVATE void sqlite3BeginWriteOperation(Parse*, int, int);
SQLITE_PRIVATE void sqlite3MultiWrite(Parse*);
SQLITE_PRIVATE void sqlite3MayAbort(Parse*);
................................................................................
SQLITE_PRIVATE void sqlite3NestedParse(Parse*, const char*, ...);
SQLITE_PRIVATE void sqlite3ExpirePreparedStatements(sqlite3*);
SQLITE_PRIVATE int sqlite3CodeSubselect(Parse *, Expr *, int, int);
SQLITE_PRIVATE void sqlite3SelectPrep(Parse*, Select*, NameContext*);
SQLITE_PRIVATE int sqlite3MatchSpanName(const char*, const char*, const char*, const char*);
SQLITE_PRIVATE int sqlite3ResolveExprNames(NameContext*, Expr*);
SQLITE_PRIVATE void sqlite3ResolveSelectNames(Parse*, Select*, NameContext*);

SQLITE_PRIVATE int sqlite3ResolveOrderGroupBy(Parse*, Select*, ExprList*, const char*);
SQLITE_PRIVATE void sqlite3ColumnDefault(Vdbe *, Table *, int, int);
SQLITE_PRIVATE void sqlite3AlterFinishAddColumn(Parse *, Token *);
SQLITE_PRIVATE void sqlite3AlterBeginAddColumn(Parse *, SrcList *);
SQLITE_PRIVATE CollSeq *sqlite3GetCollSeq(Parse*, u8, CollSeq *, const char*);
SQLITE_PRIVATE char sqlite3AffinityType(const char*);
SQLITE_PRIVATE void sqlite3Analyze(Parse*, Token*, Token*);
................................................................................
SQLITE_PRIVATE void sqlite3DefaultRowEst(Index*);
SQLITE_PRIVATE void sqlite3RegisterLikeFunctions(sqlite3*, int);
SQLITE_PRIVATE int sqlite3IsLikeFunction(sqlite3*,Expr*,int*,char*);
SQLITE_PRIVATE void sqlite3MinimumFileFormat(Parse*, int, int);
SQLITE_PRIVATE void sqlite3SchemaClear(void *);
SQLITE_PRIVATE Schema *sqlite3SchemaGet(sqlite3 *, Btree *);
SQLITE_PRIVATE int sqlite3SchemaToIndex(sqlite3 *db, Schema *);

SQLITE_PRIVATE KeyInfo *sqlite3IndexKeyinfo(Parse *, Index *);
SQLITE_PRIVATE int sqlite3CreateFunc(sqlite3 *, const char *, int, int, void *, 
  void (*)(sqlite3_context*,int,sqlite3_value **),
  void (*)(sqlite3_context*,int,sqlite3_value **), void (*)(sqlite3_context*),
  FuncDestructor *pDestructor
);
SQLITE_PRIVATE int sqlite3ApiExit(sqlite3 *db, int);
................................................................................
#  define sqlite3VtabUnlock(X)
#  define sqlite3VtabUnlockList(X)
#  define sqlite3VtabSavepoint(X, Y, Z) SQLITE_OK
#  define sqlite3GetVTable(X,Y)  ((VTable*)0)
#else
SQLITE_PRIVATE    void sqlite3VtabClear(sqlite3 *db, Table*);
SQLITE_PRIVATE    void sqlite3VtabDisconnect(sqlite3 *db, Table *p);
SQLITE_PRIVATE    int sqlite3VtabSync(sqlite3 *db, char **);
SQLITE_PRIVATE    int sqlite3VtabRollback(sqlite3 *db);
SQLITE_PRIVATE    int sqlite3VtabCommit(sqlite3 *db);
SQLITE_PRIVATE    void sqlite3VtabLock(VTable *);
SQLITE_PRIVATE    void sqlite3VtabUnlock(VTable *);
SQLITE_PRIVATE    void sqlite3VtabUnlockList(sqlite3*);
SQLITE_PRIVATE    int sqlite3VtabSavepoint(sqlite3 *, int, int);

SQLITE_PRIVATE    VTable *sqlite3GetVTable(sqlite3*, Table*);
#  define sqlite3VtabInSync(db) ((db)->nVTrans>0 && (db)->aVTrans==0)
#endif
SQLITE_PRIVATE void sqlite3VtabMakeWritable(Parse*,Table*);
SQLITE_PRIVATE void sqlite3VtabBeginParse(Parse*, Token*, Token*, Token*, int);
SQLITE_PRIVATE void sqlite3VtabFinishParse(Parse*, Token*);
SQLITE_PRIVATE void sqlite3VtabArgInit(Parse*);
................................................................................

/* Opaque type used by code in vdbesort.c */
typedef struct VdbeSorter VdbeSorter;

/* Opaque type used by the explainer */
typedef struct Explain Explain;




/*
** A cursor is a pointer into a single BTree within a database file.
** The cursor can seek to a BTree entry with a particular key, or
** loop over all entries of the Btree.  You can also insert new BTree
** entries or retrieve the key or data from the entry that the cursor
** is currently pointing to.
** 
................................................................................
** Return true if a memory cell is not marked as invalid.  This macro
** is for use inside assert() statements only.
*/
#ifdef SQLITE_DEBUG
#define memIsValid(M)  ((M)->flags & MEM_Invalid)==0
#endif



/* A VdbeFunc is just a FuncDef (defined in sqliteInt.h) that contains
** additional information about auxiliary information bound to arguments
** of the function.  This is used to implement the sqlite3_get_auxdata()
** and sqlite3_set_auxdata() APIs.  The "auxdata" is some auxiliary data
** that can be associated with a constant argument to a function.  This
** allows functions such as "regexp" to compile their constant regular
** expression argument once and reused the compiled code for multiple
** invocations.
*/
struct VdbeFunc {
  FuncDef *pFunc;               /* The definition of the function */
  int nAux;                     /* Number of entries allocated for apAux[] */
  struct AuxData {


    void *pAux;                   /* Aux data for the i-th argument */
    void (*xDelete)(void *);      /* Destructor for the aux data */
  } apAux[1];                   /* One slot for each function argument */

};

/*
** The "context" argument for a installable function.  A pointer to an
** instance of this structure is the first argument to the routines used
** implement the SQL functions.
**
................................................................................
** structure are known.
**
** This structure is defined inside of vdbeInt.h because it uses substructures
** (Mem) which are only defined there.
*/
struct sqlite3_context {
  FuncDef *pFunc;       /* Pointer to function information.  MUST BE FIRST */
  VdbeFunc *pVdbeFunc;  /* Auxilary data, if created. */
  Mem s;                /* The return value is stored here */
  Mem *pMem;            /* Memory cell used to store aggregate context */
  CollSeq *pColl;       /* Collating sequence */


  int isError;          /* Error code returned by the function. */
  int skipFlag;         /* Skip skip accumulator loading if true */

};

/*
** An Explain object accumulates indented output which is helpful
** in describing recursive data structures.
*/
struct Explain {
................................................................................
  u8 minWriteFileFormat;  /* Minimum file format for writable database files */
  bft explain:2;          /* True if EXPLAIN present on SQL command */
  bft inVtabMethod:2;     /* See comments above */
  bft changeCntOn:1;      /* True to update the change-counter */
  bft expired:1;          /* True if the VM needs to be recompiled */
  bft runOnlyOnce:1;      /* Automatically expire on reset */
  bft usesStmtJournal:1;  /* True if uses a statement journal */
  bft readOnly:1;         /* True for read-only statements */

  bft isPrepareV2:1;      /* True if prepared with prepare_v2() */
  bft doingRerun:1;       /* True if rerunning after an auto-reprepare */
  int nChange;            /* Number of db changes made since last reset */
  yDbMask btreeMask;      /* Bitmask of db->aDb[] entries referenced */
  yDbMask lockMask;       /* Subset of btreeMask that requires a lock */
  int iStatement;         /* Statement number (or 0 if has not opened stmt) */
  int aCounter[3];        /* Counters used by sqlite3_stmt_status() */
#ifndef SQLITE_OMIT_TRACE
  i64 startTime;          /* Time when query started - used for profiling */
#endif
  i64 nFkConstraint;      /* Number of imm. FK constraints this VM */
  i64 nStmtDefCons;       /* Number of def. constraints when stmt started */

  char *zSql;             /* Text of the SQL statement that generated this */
  void *pFree;            /* Free this when deleting the vdbe */
#ifdef SQLITE_DEBUG
  FILE *trace;            /* Write an execution trace here, if not NULL */
#endif
#ifdef SQLITE_ENABLE_TREE_EXPLAIN
  Explain *pExplain;      /* The explainer */
................................................................................
  VdbeFrame *pFrame;      /* Parent frame */
  VdbeFrame *pDelFrame;   /* List of frame objects to free on VM reset */
  int nFrame;             /* Number of frames in pFrame list */
  u32 expmask;            /* Binding to these vars invalidates VM */
  SubProgram *pProgram;   /* Linked list of all sub-programs used by VM */
  int nOnceFlag;          /* Size of array aOnceFlag[] */
  u8 *aOnceFlag;          /* Flags for OP_Once */

};

/*
** The following are allowed values for Vdbe.magic
*/
#define VDBE_MAGIC_INIT     0x26bceaa5    /* Building a VDBE program */
#define VDBE_MAGIC_RUN      0xbdf20da3    /* VDBE is ready to execute */
................................................................................
#if defined(SQLITE_DEBUG) || defined(VDBE_PROFILE)
SQLITE_PRIVATE void sqlite3VdbePrintOp(FILE*, int, Op*);
#endif
SQLITE_PRIVATE u32 sqlite3VdbeSerialTypeLen(u32);
SQLITE_PRIVATE u32 sqlite3VdbeSerialType(Mem*, int);
SQLITE_PRIVATE u32 sqlite3VdbeSerialPut(unsigned char*, int, Mem*, int);
SQLITE_PRIVATE u32 sqlite3VdbeSerialGet(const unsigned char*, u32, Mem*);
SQLITE_PRIVATE void sqlite3VdbeDeleteAuxData(VdbeFunc*, int);

int sqlite2BtreeKeyCompare(BtCursor *, const void *, int, int, int *);
SQLITE_PRIVATE int sqlite3VdbeIdxKeyCompare(VdbeCursor*,UnpackedRecord*,int*);
SQLITE_PRIVATE int sqlite3VdbeIdxRowid(sqlite3*, BtCursor *, i64 *);
SQLITE_PRIVATE int sqlite3MemCompare(const Mem*, const Mem*, const CollSeq*);
SQLITE_PRIVATE int sqlite3VdbeExec(Vdbe*);
SQLITE_PRIVATE int sqlite3VdbeList(Vdbe*);
................................................................................
          sqlite3PagerCacheStat(pPager, op, resetFlag, &nRet);
        }
      }
      *pHighwater = 0;
      *pCurrent = nRet;
      break;
    }











    default: {
      rc = SQLITE_ERROR;
    }
  }
  sqlite3_mutex_leave(db->mutex);
  return rc;
................................................................................
  ** of each block.  One byte per block.
  */
  u8 *aCtrl;

} mem5;

/*
** Access the static variable through a macro for SQLITE_OMIT_WSD
*/
#define mem5 GLOBAL(struct Mem5Global, mem5)

/*
** Assuming mem5.zPool is divided up into an array of Mem5Link
** structures, return a pointer to the idx-th such lik.
*/
#define MEM5LINK(idx) ((Mem5Link *)(&mem5.zPool[(idx)*mem5.szAtom]))

/*
** Unlink the chunk at mem5.aPool[i] from list it is currently
** on.  It should be found on mem5.aiFreelist[iLogsize].
*/
................................................................................
  return iFirst;
}

/*
** Return a block of memory of at least nBytes in size.
** Return NULL if unable.  Return NULL if nBytes==0.
**
** The caller guarantees that nByte positive.
**
** The caller has obtained a mutex prior to invoking this
** routine so there is never any chance that two or more
** threads can be in this routine at the same time.
*/
static void *memsys5MallocUnsafe(int nByte){
  int i;           /* Index of a mem5.aPool[] slot */
................................................................................
    }
    size *= 2;
  }
  memsys5Link(iBlock, iLogsize);
}

/*
** Allocate nBytes of memory
*/
static void *memsys5Malloc(int nBytes){
  sqlite3_int64 *p = 0;
  if( nBytes>0 ){
    memsys5Enter();
    p = memsys5MallocUnsafe(nBytes);
    memsys5Leave();
................................................................................
        if( precision<etBUFSIZE-10 ){
          nOut = etBUFSIZE;
          zOut = buf;
        }else{
          nOut = precision + 10;
          zOut = zExtra = sqlite3Malloc( nOut );
          if( zOut==0 ){
            pAccum->mallocFailed = 1;
            return;
          }
        }
        bufpt = &zOut[nOut-1];
        if( xtype==etORDINAL ){
          static const char zOrd[] = "thstndrd";
          int x = (int)(longvalue % 10);
................................................................................
          prefix = '-';
        }else{
          if( flag_plussign )          prefix = '+';
          else if( flag_blanksign )    prefix = ' ';
          else                         prefix = 0;
        }
        if( xtype==etGENERIC && precision>0 ) precision--;
#if 0
        /* Rounding works like BSD when the constant 0.4999 is used.  Wierd! */
        for(idx=precision, rounder=0.4999; idx>0; idx--, rounder*=0.1);
#else
        /* It makes more sense to use 0.5 */
        for(idx=precision, rounder=0.5; idx>0; idx--, rounder*=0.1){}
#endif
        if( xtype==etFLOAT ) realvalue += rounder;
        /* Normalize realvalue to within 10.0 > realvalue >= 1.0 */
        exp = 0;
        if( sqlite3IsNaN((double)realvalue) ){
          bufpt = "NaN";
          length = 3;
          break;
................................................................................
          flag_rtz = flag_altform2;
        }
        if( xtype==etEXP ){
          e2 = 0;
        }else{
          e2 = exp;
        }
        if( e2+precision+width > etBUFSIZE - 15 ){
          bufpt = zExtra = sqlite3Malloc( e2+precision+width+15 );
          if( bufpt==0 ){
            pAccum->mallocFailed = 1;
            return;
          }
        }
        zOut = bufpt;
        nsd = 16 + flag_altform2*10;
        flag_dp = (precision>0 ?1:0) | flag_alternateform | flag_altform2;
        /* The sign in front of the number */
................................................................................
          if( ch==q )  n++;
        }
        needQuote = !isnull && xtype==etSQLESCAPE2;
        n += i + 1 + needQuote*2;
        if( n>etBUFSIZE ){
          bufpt = zExtra = sqlite3Malloc( n );
          if( bufpt==0 ){
            pAccum->mallocFailed = 1;
            return;
          }
        }else{
          bufpt = buf;
        }
        j = 0;
        if( needQuote ) bufpt[j++] = q;
................................................................................
} /* End of function */

/*
** Append N bytes of text from z to the StrAccum object.
*/
SQLITE_PRIVATE void sqlite3StrAccumAppend(StrAccum *p, const char *z, int N){
  assert( z!=0 || N==0 );
  if( p->tooBig | p->mallocFailed ){
    testcase(p->tooBig);
    testcase(p->mallocFailed);
    return;
  }
  assert( p->zText!=0 || p->nChar==0 );
  if( N<0 ){

    N = sqlite3Strlen30(z);
  }
  if( N==0 || NEVER(z==0) ){
    return;
  }
  if( p->nChar+N >= p->nAlloc ){
    char *zNew;
    if( !p->useMalloc ){
      p->tooBig = 1;
      N = p->nAlloc - p->nChar - 1;
      if( N<=0 ){
        return;
      }
    }else{
      char *zOld = (p->zText==p->zBase ? 0 : p->zText);
      i64 szNew = p->nChar;
      szNew += N + 1;
      if( szNew > p->mxAlloc ){
        sqlite3StrAccumReset(p);
        p->tooBig = 1;
        return;
      }else{
        p->nAlloc = (int)szNew;
      }
      if( p->useMalloc==1 ){
        zNew = sqlite3DbRealloc(p->db, zOld, p->nAlloc);
      }else{
        zNew = sqlite3_realloc(zOld, p->nAlloc);
      }
      if( zNew ){
        if( zOld==0 && p->nChar>0 ) memcpy(zNew, p->zText, p->nChar);
        p->zText = zNew;
      }else{
        p->mallocFailed = 1;
        sqlite3StrAccumReset(p);
        return;
      }
    }
  }
  assert( p->zText );
  memcpy(&p->zText[p->nChar], z, N);
................................................................................
        p->zText = sqlite3DbMallocRaw(p->db, p->nChar+1 );
      }else{
        p->zText = sqlite3_malloc(p->nChar+1);
      }
      if( p->zText ){
        memcpy(p->zText, p->zBase, p->nChar+1);
      }else{
        p->mallocFailed = 1;
      }
    }
  }
  return p->zText;
}

/*
................................................................................
SQLITE_PRIVATE void sqlite3StrAccumInit(StrAccum *p, char *zBase, int n, int mx){
  p->zText = p->zBase = zBase;
  p->db = 0;
  p->nChar = 0;
  p->nAlloc = n;
  p->mxAlloc = mx;
  p->useMalloc = 1;
  p->tooBig = 0;
  p->mallocFailed = 0;
}

/*
** Print into memory obtained from sqliteMalloc().  Use the internal
** %-conversion extensions.
*/
SQLITE_PRIVATE char *sqlite3VMPrintf(sqlite3 *db, const char *zFormat, va_list ap){
................................................................................
  StrAccum acc;
  assert( db!=0 );
  sqlite3StrAccumInit(&acc, zBase, sizeof(zBase),
                      db->aLimit[SQLITE_LIMIT_LENGTH]);
  acc.db = db;
  sqlite3VXPrintf(&acc, 1, zFormat, ap);
  z = sqlite3StrAccumFinish(&acc);
  if( acc.mallocFailed ){
    db->mallocFailed = 1;
  }
  return z;
}

/*
** Print into memory obtained from sqliteMalloc().  Use the internal
................................................................................
static SQLITE_WSD struct sqlite3PrngType {
  unsigned char isInit;          /* True if initialized */
  unsigned char i, j;            /* State variables */
  unsigned char s[256];          /* State variables */
} sqlite3Prng;

/*
** Get a single 8-bit random value from the RC4 PRNG.  The Mutex
** must be held while executing this routine.
**
** Why not just use a library random generator like lrand48() for this?
** Because the OP_NewRowid opcode in the VDBE depends on having a very
** good source of random numbers.  The lrand48() library function may
** well be good enough.  But maybe not.  Or maybe lrand48() has some
** subtle problems on some systems that could cause problems.  It is hard
** to know.  To minimize the risk of problems due to bad lrand48()
** implementations, SQLite uses this random number generator based
** on RC4, which we know works very well.
**
** (Later):  Actually, OP_NewRowid does not depend on a good source of
** randomness any more.  But we will leave this code in all the same.
*/
static u8 randomByte(void){

  unsigned char t;



  /* The "wsdPrng" macro will resolve to the pseudo-random number generator
  ** state vector.  If writable static data is unsupported on the target,
  ** we have to locate the state vector at run-time.  In the more common
  ** case where writable static data is supported, wsdPrng can refer directly
  ** to the "sqlite3Prng" state vector declared above.
  */
................................................................................
#ifdef SQLITE_OMIT_WSD
  struct sqlite3PrngType *p = &GLOBAL(struct sqlite3PrngType, sqlite3Prng);
# define wsdPrng p[0]
#else
# define wsdPrng sqlite3Prng
#endif






  /* Initialize the state of the random number generator once,
  ** the first time this routine is called.  The seed value does
  ** not need to contain a lot of randomness since we are not
  ** trying to do secure encryption or anything like that...
  **
  ** Nothing in this file or anywhere else in SQLite does any kind of
................................................................................
      t = wsdPrng.s[wsdPrng.j];
      wsdPrng.s[wsdPrng.j] = wsdPrng.s[i];
      wsdPrng.s[i] = t;
    }
    wsdPrng.isInit = 1;
  }

  /* Generate and return single random byte
  */
  wsdPrng.i++;
  t = wsdPrng.s[wsdPrng.i];
  wsdPrng.j += t;
  wsdPrng.s[wsdPrng.i] = wsdPrng.s[wsdPrng.j];
  wsdPrng.s[wsdPrng.j] = t;
  t += wsdPrng.s[wsdPrng.i];
  return wsdPrng.s[t];
}

/*
** Return N random bytes.
*/
SQLITE_API void sqlite3_randomness(int N, void *pBuf){
  unsigned char *zBuf = pBuf;
#if SQLITE_THREADSAFE
  sqlite3_mutex *mutex = sqlite3MutexAlloc(SQLITE_MUTEX_STATIC_PRNG);
#endif
  sqlite3_mutex_enter(mutex);
  while( N-- ){
    *(zBuf++) = randomByte();
  }
  sqlite3_mutex_leave(mutex);
}

#ifndef SQLITE_OMIT_BUILTIN_TEST
/*
** For testing purposes, we sometimes want to preserve the state of
................................................................................
/************** End of hash.c ************************************************/
/************** Begin file opcodes.c *****************************************/
/* Automatically generated.  Do not edit */
/* See the mkopcodec.awk script for details. */
#if !defined(SQLITE_OMIT_EXPLAIN) || !defined(NDEBUG) || defined(VDBE_PROFILE) || defined(SQLITE_DEBUG)
SQLITE_PRIVATE const char *sqlite3OpcodeName(int i){
 static const char *const azName[] = { "?",
     /*   1 */ "Goto",
     /*   2 */ "Gosub",
     /*   3 */ "Return",
     /*   4 */ "Yield",
     /*   5 */ "HaltIfNull",
     /*   6 */ "Halt",
     /*   7 */ "Integer",
     /*   8 */ "Int64",
     /*   9 */ "String",
     /*  10 */ "Null",
     /*  11 */ "Blob",
     /*  12 */ "Variable",
     /*  13 */ "Move",
     /*  14 */ "Copy",
     /*  15 */ "SCopy",
     /*  16 */ "ResultRow",
     /*  17 */ "CollSeq",
     /*  18 */ "Function",
     /*  19 */ "Not",
     /*  20 */ "AddImm",
     /*  21 */ "MustBeInt",
     /*  22 */ "RealAffinity",
     /*  23 */ "Permutation",
     /*  24 */ "Compare",
     /*  25 */ "Jump",
     /*  26 */ "Once",
     /*  27 */ "If",
     /*  28 */ "IfNot",
     /*  29 */ "Column",
     /*  30 */ "Affinity",
     /*  31 */ "MakeRecord",
     /*  32 */ "Count",
     /*  33 */ "Savepoint",
     /*  34 */ "AutoCommit",
     /*  35 */ "Transaction",
     /*  36 */ "ReadCookie",
     /*  37 */ "SetCookie",
     /*  38 */ "VerifyCookie",
     /*  39 */ "OpenRead",
     /*  40 */ "OpenWrite",
     /*  41 */ "OpenAutoindex",
     /*  42 */ "OpenEphemeral",
     /*  43 */ "SorterOpen",
     /*  44 */ "OpenPseudo",
     /*  45 */ "Close",
     /*  46 */ "SeekLt",
     /*  47 */ "SeekLe",
     /*  48 */ "SeekGe",
     /*  49 */ "SeekGt",
     /*  50 */ "Seek",
     /*  51 */ "NotFound",
     /*  52 */ "Found",
     /*  53 */ "IsUnique",
     /*  54 */ "NotExists",
     /*  55 */ "Sequence",
     /*  56 */ "NewRowid",
     /*  57 */ "Insert",
     /*  58 */ "InsertInt",
     /*  59 */ "Delete",
     /*  60 */ "ResetCount",
     /*  61 */ "SorterCompare",
     /*  62 */ "SorterData",
     /*  63 */ "RowKey",
     /*  64 */ "RowData",
     /*  65 */ "Rowid",
     /*  66 */ "NullRow",
     /*  67 */ "Last",
     /*  68 */ "Or",
     /*  69 */ "And",
     /*  70 */ "SorterSort",
     /*  71 */ "Sort",
     /*  72 */ "Rewind",
     /*  73 */ "IsNull",
     /*  74 */ "NotNull",
     /*  75 */ "Ne",
     /*  76 */ "Eq",
     /*  77 */ "Gt",
     /*  78 */ "Le",
     /*  79 */ "Lt",
     /*  80 */ "Ge",
     /*  81 */ "SorterNext",
     /*  82 */ "BitAnd",
     /*  83 */ "BitOr",
     /*  84 */ "ShiftLeft",
     /*  85 */ "ShiftRight",
     /*  86 */ "Add",
     /*  87 */ "Subtract",
     /*  88 */ "Multiply",
     /*  89 */ "Divide",
     /*  90 */ "Remainder",
     /*  91 */ "Concat",
     /*  92 */ "Prev",
     /*  93 */ "BitNot",
     /*  94 */ "String8",
     /*  95 */ "Next",
     /*  96 */ "SorterInsert",
     /*  97 */ "IdxInsert",
     /*  98 */ "IdxDelete",
     /*  99 */ "IdxRowid",
     /* 100 */ "IdxLT",
     /* 101 */ "IdxGE",
     /* 102 */ "Destroy",
     /* 103 */ "Clear",
     /* 104 */ "CreateIndex",
     /* 105 */ "CreateTable",
     /* 106 */ "ParseSchema",
     /* 107 */ "LoadAnalysis",
     /* 108 */ "DropTable",
     /* 109 */ "DropIndex",
     /* 110 */ "DropTrigger",
     /* 111 */ "IntegrityCk",
     /* 112 */ "RowSetAdd",
     /* 113 */ "RowSetRead",
     /* 114 */ "RowSetTest",
     /* 115 */ "Program",
     /* 116 */ "Param",
     /* 117 */ "FkCounter",
     /* 118 */ "FkIfZero",
     /* 119 */ "MemMax",
     /* 120 */ "IfPos",
     /* 121 */ "IfNeg",
     /* 122 */ "IfZero",
     /* 123 */ "AggStep",
     /* 124 */ "AggFinal",
     /* 125 */ "Checkpoint",
     /* 126 */ "JournalMode",
     /* 127 */ "Vacuum",
     /* 128 */ "IncrVacuum",
     /* 129 */ "Expire",
     /* 130 */ "Real",
     /* 131 */ "TableLock",
     /* 132 */ "VBegin",
     /* 133 */ "VCreate",
     /* 134 */ "VDestroy",
     /* 135 */ "VOpen",
     /* 136 */ "VFilter",
     /* 137 */ "VColumn",
     /* 138 */ "VNext",
     /* 139 */ "VRename",
     /* 140 */ "VUpdate",
     /* 141 */ "ToText",
     /* 142 */ "ToBlob",
     /* 143 */ "ToNumeric",
     /* 144 */ "ToInt",
     /* 145 */ "ToReal",
     /* 146 */ "Pagecount",
     /* 147 */ "MaxPgcnt",
................................................................................
**   *  sqlite3_vfs method implementations.
**   *  Locking primitives for the proxy uber-locking-method. (MacOSX only)
**   *  Definitions of sqlite3_vfs objects for all locking methods
**      plus implementations of sqlite3_os_init() and sqlite3_os_end().
*/
#if SQLITE_OS_UNIX              /* This file is used on unix only */

/* Use posix_fallocate() if it is available
*/
#if !defined(HAVE_POSIX_FALLOCATE) \
      && (_XOPEN_SOURCE >= 600 || _POSIX_C_SOURCE >= 200112L)
# define HAVE_POSIX_FALLOCATE 1
#endif

/*
** There are various methods for file locking used for concurrency
** control:
**
**   1. POSIX locking (the default),
**   2. No locking,
**   3. Dot-file locking,
................................................................................
        unixGetTempname(pFile->pVfs->mxPathname, zTFile);
        *(char**)pArg = zTFile;
      }
      return SQLITE_OK;
    }
    case SQLITE_FCNTL_MMAP_SIZE: {
      i64 newLimit = *(i64*)pArg;

      if( newLimit>sqlite3GlobalConfig.mxMmap ){
        newLimit = sqlite3GlobalConfig.mxMmap;
      }
      *(i64*)pArg = pFile->mmapSizeMax;
      if( newLimit>=0 ){
        pFile->mmapSizeMax = newLimit;
        if( newLimit<pFile->mmapSize ) pFile->mmapSize = newLimit;


      }

      return SQLITE_OK;
    }
#ifdef SQLITE_DEBUG
    /* The pager calls this method to signal that it has done
    ** a rollback and that the database is therefore unchanged and
    ** it hence it is OK for the transaction change counter to be
    ** unchanged.
    */
................................................................................
**
** This file contains code that is specific to Windows.
*/
#if SQLITE_OS_WIN               /* This file is used for Windows only */

#ifdef __CYGWIN__
# include <sys/cygwin.h>

#endif

/*
** Include code that is common to all os_*.c files
*/
/************** Include os_common.h in the middle of os_win.c ****************/
/************** Begin file os_common.h ***************************************/
................................................................................

/*
** This file mapping API is common to both Win32 and WinRT.
*/
WINBASEAPI BOOL WINAPI UnmapViewOfFile(LPCVOID);
#endif /* SQLITE_WIN32_FILEMAPPING_API && !defined(SQLITE_OMIT_WAL) */

/*
** Macro to find the minimum of two numeric values.
*/
#ifndef MIN
# define MIN(x,y) ((x)<(y)?(x):(y))
#endif

/*
** Some Microsoft compilers lack this definition.
*/
#ifndef INVALID_FILE_ATTRIBUTES
# define INVALID_FILE_ATTRIBUTES ((DWORD)-1) 
#endif

................................................................................
/*
 * The extra flags to use in calls to the Win32 heap APIs.  This value may be
 * zero for the default behavior.
 */
#ifndef SQLITE_WIN32_HEAP_FLAGS
#  define SQLITE_WIN32_HEAP_FLAGS     (0)
#endif


/*
** The winMemData structure stores information required by the Win32-specific
** sqlite3_mem_methods implementation.
*/
typedef struct winMemData winMemData;
struct winMemData {
................................................................................
  }else{
    pFile->ctrlFlags |= mask;
  }
}

/* Forward declaration */
static int getTempname(int nBuf, char *zBuf);




/*
** Control and query of the open file handle.
*/
static int winFileControl(sqlite3_file *id, int op, void *pArg){
  winFile *pFile = (winFile*)id;
  OSTRACE(("FCNTL file=%p, op=%d, pArg=%p\n", pFile->h, op, pArg));
................................................................................
      }
      OSTRACE(("FCNTL file=%p, rc=SQLITE_OK\n", pFile->h));
      return SQLITE_OK;
    }
#if SQLITE_MAX_MMAP_SIZE>0
    case SQLITE_FCNTL_MMAP_SIZE: {
      i64 newLimit = *(i64*)pArg;

      if( newLimit>sqlite3GlobalConfig.mxMmap ){
        newLimit = sqlite3GlobalConfig.mxMmap;
      }
      *(i64*)pArg = pFile->mmapSizeMax;

      if( newLimit>=0 ) pFile->mmapSizeMax = newLimit;





      OSTRACE(("FCNTL file=%p, rc=SQLITE_OK\n", pFile->h));
      return SQLITE_OK;
    }
#endif
  }
  OSTRACE(("FCNTL file=%p, rc=SQLITE_NOTFOUND\n", pFile->h));
  return SQLITE_NOTFOUND;
}

................................................................................
                       "winMapfile", pFd->zPath);
      /* Log the error, but continue normal operation using xRead/xWrite */
      OSTRACE(("MAP-FILE-CREATE pid=%lu, pFile=%p, rc=SQLITE_IOERR_MMAP\n",
               osGetCurrentProcessId(), pFd));
      return SQLITE_OK;
    }
    assert( (nMap % winSysInfo.dwPageSize)==0 );

#if SQLITE_OS_WINRT
    pNew = osMapViewOfFileFromApp(pFd->hMap, flags, 0, nMap);
#else
    assert( sizeof(SIZE_T)==sizeof(sqlite3_int64) || nMap<=0xffffffff );
    pNew = osMapViewOfFile(pFd->hMap, flags, 0, 0, (SIZE_T)nMap);
#endif
    if( pNew==NULL ){
      osCloseHandle(pFd->hMap);
      pFd->hMap = NULL;
      pFd->lastErrno = osGetLastError();
      winLogError(SQLITE_IOERR_MMAP, pFd->lastErrno,
................................................................................
    zConverted = sqlite3_win32_utf8_to_mbcs(zFilename);
  }
#endif
  /* caller will handle out of memory */
  return zConverted;
}










/*
** Create a temporary file name in zBuf.  zBuf must be big enough to
** hold at pVfs->mxPathname characters.
*/
static int getTempname(int nBuf, char *zBuf){
  static char zChars[] =
    "abcdefghijklmnopqrstuvwxyz"
    "ABCDEFGHIJKLMNOPQRSTUVWXYZ"
    "0123456789";
  size_t i, j;
  int nTempPath;
  char zTempPath[MAX_PATH+2];

  /* It's odd to simulate an io-error here, but really this is just
  ** using the io-error infrastructure to test that SQLite handles this
  ** function failing. 
  */
  SimulateIOError( return SQLITE_IOERR );

  memset(zTempPath, 0, MAX_PATH+2);

  if( sqlite3_temp_directory ){

    sqlite3_snprintf(MAX_PATH-30, zTempPath, "%s", sqlite3_temp_directory);
  }
#if !SQLITE_OS_WINRT
  else if( isNT() ){
    char *zMulti;
    WCHAR zWidePath[MAX_PATH];
    osGetTempPathW(MAX_PATH-30, zWidePath);



    zMulti = unicodeToUtf8(zWidePath);
    if( zMulti ){
      sqlite3_snprintf(MAX_PATH-30, zTempPath, "%s", zMulti);
      sqlite3_free(zMulti);
    }else{
      OSTRACE(("TEMP-FILENAME rc=SQLITE_IOERR_NOMEM\n"));
      return SQLITE_IOERR_NOMEM;
    }
  }
#ifdef SQLITE_WIN32_HAS_ANSI
  else{
    char *zUtf8;
    char zMbcsPath[MAX_PATH];
    osGetTempPathA(MAX_PATH-30, zMbcsPath);



    zUtf8 = sqlite3_win32_mbcs_to_utf8(zMbcsPath);
    if( zUtf8 ){
      sqlite3_snprintf(MAX_PATH-30, zTempPath, "%s", zUtf8);
      sqlite3_free(zUtf8);
    }else{
      OSTRACE(("TEMP-FILENAME rc=SQLITE_IOERR_NOMEM\n"));
      return SQLITE_IOERR_NOMEM;
    }
  }
#endif








#endif









  /* Check that the output buffer is large enough for the temporary file 
  ** name. If it is not, return SQLITE_ERROR.
  */
  nTempPath = sqlite3Strlen30(zTempPath);

  if( (nTempPath + sqlite3Strlen30(SQLITE_TEMP_FILE_PREFIX) + 18) >= nBuf ){
................................................................................
  void *zConverted;              /* Filename in OS encoding */
  const char *zUtf8Name = zName; /* Filename in UTF-8 encoding */
  int cnt = 0;

  /* If argument zPath is a NULL pointer, this function is required to open
  ** a temporary file. Use this buffer to store the file name in.
  */
  char zTmpname[MAX_PATH+2];     /* Buffer used to create temp filename */

  int rc = SQLITE_OK;            /* Function Return Code */
#if !defined(NDEBUG) || SQLITE_OS_WINCE
  int eType = flags&0xFFFFFF00;  /* Type of file to open */
#endif

  int isExclusive  = (flags & SQLITE_OPEN_EXCLUSIVE);
................................................................................
#endif

  /* If the second argument to this function is NULL, generate a 
  ** temporary file name to use 
  */
  if( !zUtf8Name ){
    assert(isDelete && !isOpenJournal);
    memset(zTmpname, 0, MAX_PATH+2);
    rc = getTempname(MAX_PATH+2, zTmpname);
    if( rc!=SQLITE_OK ){
      OSTRACE(("OPEN name=%s, rc=%s", zUtf8Name, sqlite3ErrName(rc)));
      return rc;
    }
    zUtf8Name = zTmpname;
  }

................................................................................
  int nFull,                    /* Size of output buffer in bytes */
  char *zFull                   /* Output buffer */
){
  
#if defined(__CYGWIN__)
  SimulateIOError( return SQLITE_ERROR );
  UNUSED_PARAMETER(nFull);
  assert( pVfs->mxPathname>=MAX_PATH );
  assert( nFull>=pVfs->mxPathname );
  if ( sqlite3_data_directory && !winIsVerbatimPathname(zRelative) ){
    /*
    ** NOTE: We are dealing with a relative path name and the data
    **       directory has been set.  Therefore, use it as the basis
    **       for converting the relative path name to an absolute
    **       one by prepending the data directory and a slash.
    */
    char zOut[MAX_PATH+1];
    memset(zOut, 0, MAX_PATH+1);
    cygwin_conv_path(CCP_POSIX_TO_WIN_A|CCP_RELATIVE, zRelative, zOut,
                     MAX_PATH+1);




    sqlite3_snprintf(MIN(nFull, pVfs->mxPathname), zFull, "%s\\%s",
                     sqlite3_data_directory, zOut);
  }else{
    cygwin_conv_path(CCP_POSIX_TO_WIN_A, zRelative, zFull, nFull);




  }
  return SQLITE_OK;
#endif

#if (SQLITE_OS_WINCE || SQLITE_OS_WINRT) && !defined(__CYGWIN__)
  SimulateIOError( return SQLITE_ERROR );
  /* WinCE has no concept of a relative pathname, or so I am told. */
................................................................................
/*
** Initialize and deinitialize the operating system interface.
*/
SQLITE_API int sqlite3_os_init(void){
  static sqlite3_vfs winVfs = {
    3,                   /* iVersion */
    sizeof(winFile),     /* szOsFile */
    MAX_PATH,            /* mxPathname */
    0,                   /* pNext */
    "win32",             /* zName */
    0,                   /* pAppData */
    winOpen,             /* xOpen */
    winDelete,           /* xDelete */
    winAccess,           /* xAccess */
    winFullPathname,     /* xFullPathname */
................................................................................
*/
static sqlite3_pcache *pcache1Create(int szPage, int szExtra, int bPurgeable){
  PCache1 *pCache;      /* The newly created page cache */
  PGroup *pGroup;       /* The group the new page cache will belong to */
  int sz;               /* Bytes of memory required to allocate the new cache */

  /*
  ** The seperateCache variable is true if each PCache has its own private
  ** PGroup.  In other words, separateCache is true for mode (1) where no
  ** mutexing is required.
  **
  **   *  Always use a unified cache (mode-2) if ENABLE_MEMORY_MANAGEMENT
  **
  **   *  Always use a unified cache in single-threaded applications
  **
................................................................................
  )){
    goto fetch_out;
  }

  if( pCache->nPage>=pCache->nHash && pcache1ResizeHash(pCache) ){
    goto fetch_out;
  }


  /* Step 4. Try to recycle a page. */
  if( pCache->bPurgeable && pGroup->pLruTail && (
         (pCache->nPage+1>=pCache->nMax)
      || pGroup->nCurrentPage>=pGroup->nMaxPage
      || pcache1UnderMemoryPressure(pCache)
  )){
................................................................................
  Pgno nOrig;                  /* Original number of pages in file */
  Pgno iSubRec;                /* Index of first record in sub-journal */
#ifndef SQLITE_OMIT_WAL
  u32 aWalData[WAL_SAVEPOINT_NDATA];        /* WAL savepoint context */
#endif
};








/*
** A open page cache is an instance of struct Pager. A description of
** some of the more important member variables follows:
**
** eState
**
**   The current 'state' of the pager object. See the comment and state
................................................................................
**   subsequently interrupted transaction that reuses the journal file.
**
**   The flag is cleared as soon as the journal file is finalized (either
**   by PagerCommitPhaseTwo or PagerRollback). If an IO error prevents the
**   journal file from being successfully finalized, the setMaster flag
**   is cleared anyway (and the pager will move to ERROR state).
**
** doNotSpill, doNotSyncSpill
**
**   These two boolean variables control the behavior of cache-spills
**   (calls made by the pcache module to the pagerStress() routine to
**   write cached data to the file-system in order to free up memory).
**

**   When doNotSpill is non-zero, writing to the database from pagerStress()
**   is disabled altogether. This is done in a very obscure case that
**   comes up during savepoint rollback that requires the pcache module
**   to allocate a new page to prevent the journal file from being written
**   while it is being traversed by code in pager_playback().

** 
**   If doNotSyncSpill is non-zero, writing to the database from pagerStress()
**   is permitted, but syncing the journal file is not. This flag is set
**   by sqlite3PagerWrite() when the file-system sector-size is larger than
**   the database page-size in order to prevent a journal sync from happening 
**   in between the journalling of two pages on the same sector. 
**
** subjInMemory
**
................................................................................
  ** "configuration" of the pager.
  */
  u8 eState;                  /* Pager state (OPEN, READER, WRITER_LOCKED..) */
  u8 eLock;                   /* Current lock held on database file */
  u8 changeCountDone;         /* Set after incrementing the change-counter */
  u8 setMaster;               /* True if a m-j name has been written to jrnl */
  u8 doNotSpill;              /* Do not spill the cache when non-zero */
  u8 doNotSyncSpill;          /* Do not do a spill that requires jrnl sync */
  u8 subjInMemory;            /* True to use in-memory sub-journals */
  Pgno dbSize;                /* Number of pages in the database */
  Pgno dbOrigSize;            /* dbSize before the current transaction */
  Pgno dbFileSize;            /* Number of pages in the database file */
  Pgno dbHintSize;            /* Value passed to FCNTL_SIZE_HINT call */
  int errCode;                /* One of several kinds of errors */
  int nRec;                   /* Pages journalled since last j-header written */
................................................................................
** or more open savepoints for which:
**
**   * The page-number is less than or equal to PagerSavepoint.nOrig, and
**   * The bit corresponding to the page-number is not set in
**     PagerSavepoint.pInSavepoint.
*/
static int subjRequiresPage(PgHdr *pPg){
  Pgno pgno = pPg->pgno;
  Pager *pPager = pPg->pPager;


  int i;


  for(i=0; i<pPager->nSavepoint; i++){
    PagerSavepoint *p = &pPager->aSavepoint[i];
    if( p->nOrig>=pgno && 0==sqlite3BitvecTest(p->pInSavepoint, pgno) ){
      return 1;

    }
  }
  return 0;
}

/*
** Return true if the page is already in the journal file.
................................................................................
  */
  if( pPager->errCode ){
    assert( !MEMDB );
    pager_reset(pPager);
    pPager->changeCountDone = pPager->tempFile;
    pPager->eState = PAGER_OPEN;
    pPager->errCode = SQLITE_OK;

  }

  pPager->journalOff = 0;
  pPager->journalHdr = 0;
  pPager->setMaster = 0;
}

................................................................................
    **
    ** The solution is to add an in-memory page to the cache containing
    ** the data just read from the sub-journal. Mark the page as dirty 
    ** and if the pager requires a journal-sync, then mark the page as 
    ** requiring a journal-sync before it is written.
    */
    assert( isSavepnt );
    assert( pPager->doNotSpill==0 );
    pPager->doNotSpill++;
    rc = sqlite3PagerAcquire(pPager, pgno, &pPg, 1);
    assert( pPager->doNotSpill==1 );
    pPager->doNotSpill--;
    if( rc!=SQLITE_OK ) return rc;
    pPg->flags &= ~PGHDR_NEED_READ;
    sqlite3PcacheMakeDirty(pPg);
  }
  if( pPg ){
    /* No page should ever be explicitly rolled back that is in use, except
    ** for page 1 which is held in use in order to keep the lock on the
................................................................................
  Pgno pgno = pPg->pgno;       /* Page number to read */
  int rc = SQLITE_OK;          /* Return code */
  int pgsz = pPager->pageSize; /* Number of bytes to read */

  assert( pPager->eState>=PAGER_READER && !MEMDB );
  assert( isOpen(pPager->fd) );

  if( NEVER(!isOpen(pPager->fd)) ){
    assert( pPager->tempFile );
    memset(pPg->pData, 0, pPager->pageSize);
    return SQLITE_OK;
  }

#ifndef SQLITE_OMIT_WAL
  if( iFrame ){
    /* Try to pull the page from the write-ahead log. */
    rc = sqlite3WalReadFrame(pPager->pWal, iFrame, pgsz, pPg->pData);
  }else
#endif
  {
................................................................................

/*
** Invoke SQLITE_FCNTL_MMAP_SIZE based on the current value of szMmap.
*/
static void pagerFixMaplimit(Pager *pPager){
#if SQLITE_MAX_MMAP_SIZE>0
  sqlite3_file *fd = pPager->fd;
  if( isOpen(fd) ){
    sqlite3_int64 sz;
    pPager->bUseFetch = (fd->pMethods->iVersion>=3) && pPager->szMmap>0;
    sz = pPager->szMmap;

    sqlite3OsFileControlHint(pPager->fd, SQLITE_FCNTL_MMAP_SIZE, &sz);
  }
#endif
}

/*
** Change the maximum size of any memory mapping made of the database file.
................................................................................
** Free as much memory as possible from the pager.
*/
SQLITE_PRIVATE void sqlite3PagerShrink(Pager *pPager){
  sqlite3PcacheShrink(pPager->pPCache);
}

/*



** Adjust the robustness of the database to damage due to OS crashes
** or power failures by changing the number of syncs()s when writing
** the rollback journal.  There are three levels:
**
**    OFF       sqlite3OsSync() is never called.  This is the default
**              for temporary and transient files.
**
**    NORMAL    The journal is synced once before writes begin on the
**              database.  This is normally adequate protection, but
**              it is theoretically possible, though very unlikely,
................................................................................
** synchronous=FULL versus synchronous=NORMAL setting determines when
** the xSync primitive is called and is relevant to all platforms.
**
** Numeric values associated with these states are OFF==1, NORMAL=2,
** and FULL=3.
*/
#ifndef SQLITE_OMIT_PAGER_PRAGMAS
SQLITE_PRIVATE void sqlite3PagerSetSafetyLevel(
  Pager *pPager,        /* The pager to set safety level for */
  int level,            /* PRAGMA synchronous.  1=OFF, 2=NORMAL, 3=FULL */  
  int bFullFsync,       /* PRAGMA fullfsync */
  int bCkptFullFsync    /* PRAGMA checkpoint_fullfsync */
){

  assert( level>=1 && level<=3 );
  pPager->noSync =  (level==1 || pPager->tempFile) ?1:0;
  pPager->fullSync = (level==3 && !pPager->tempFile) ?1:0;
  if( pPager->noSync ){
    pPager->syncFlags = 0;
    pPager->ckptSyncFlags = 0;
  }else if( bFullFsync ){
    pPager->syncFlags = SQLITE_SYNC_FULL;
    pPager->ckptSyncFlags = SQLITE_SYNC_FULL;
  }else if( bCkptFullFsync ){
    pPager->syncFlags = SQLITE_SYNC_NORMAL;
    pPager->ckptSyncFlags = SQLITE_SYNC_FULL;
  }else{
    pPager->syncFlags = SQLITE_SYNC_NORMAL;
    pPager->ckptSyncFlags = SQLITE_SYNC_NORMAL;
  }
  pPager->walSyncFlags = pPager->syncFlags;
  if( pPager->fullSync ){
    pPager->walSyncFlags |= WAL_SYNC_TRANSACTIONS;
  }





}
#endif

/*
** The following global variable is incremented whenever the library
** attempts to open a temporary file.  This information is used for
** testing and analysis only.  
................................................................................
  }

  /* Before the first write, give the VFS a hint of what the final
  ** file size will be.
  */
  assert( rc!=SQLITE_OK || isOpen(pPager->fd) );
  if( rc==SQLITE_OK 
   && (pList->pDirty ? pPager->dbSize : pList->pgno+1)>pPager->dbHintSize 

  ){
    sqlite3_int64 szFile = pPager->pageSize * (sqlite3_int64)pPager->dbSize;
    sqlite3OsFileControlHint(pPager->fd, SQLITE_FCNTL_SIZE_HINT, &szFile);
    pPager->dbHintSize = pPager->dbSize;
  }

  while( rc==SQLITE_OK && pList ){
................................................................................
static int pagerStress(void *p, PgHdr *pPg){
  Pager *pPager = (Pager *)p;
  int rc = SQLITE_OK;

  assert( pPg->pPager==pPager );
  assert( pPg->flags&PGHDR_DIRTY );

  /* The doNotSyncSpill flag is set during times when doing a sync of
  ** journal (and adding a new header) is not allowed.  This occurs
  ** during calls to sqlite3PagerWrite() while trying to journal multiple
  ** pages belonging to the same sector.
  **
  ** The doNotSpill flag inhibits all cache spilling regardless of whether
  ** or not a sync is required.  This is set during a rollback.

  **
  ** Spilling is also prohibited when in an error state since that could
  ** lead to database corruption.   In the current implementaton it 
  ** is impossible for sqlite3PcacheFetch() to be called with createFlag==1
  ** while in the error state, hence it is impossible for this routine to
  ** be called in the error state.  Nevertheless, we include a NEVER()
  ** test for the error state as a safeguard against future changes.
  */
  if( NEVER(pPager->errCode) ) return SQLITE_OK;



  if( pPager->doNotSpill ) return SQLITE_OK;

  if( pPager->doNotSyncSpill && (pPg->flags & PGHDR_NEED_SYNC)!=0 ){

    return SQLITE_OK;
  }

  pPg->pDirty = 0;
  if( pagerUseWal(pPager) ){
    /* Write a single frame for this page to the log. */
    if( subjRequiresPage(pPg) ){ 
................................................................................
** If the database image is smaller than the requested page or if a 
** non-zero value is passed as the noContent parameter and the 
** requested page is not already stored in the cache, then no 
** actual disk read occurs. In this case the memory image of the 
** page is initialized to all zeros. 
**
** If noContent is true, it means that we do not care about the contents
** of the page. This occurs in two seperate scenarios:
**
**   a) When reading a free-list leaf page from the database, and
**
**   b) When a savepoint is being rolled back and we need to load
**      a new page into the cache to be filled with the data read
**      from the savepoint journal.
**
................................................................................
** Since Lookup() never goes to disk, it never has to deal with locks
** or journal files.
*/
SQLITE_PRIVATE int sqlite3PagerAcquire(
  Pager *pPager,      /* The pager open on the database file */
  Pgno pgno,          /* Page number to fetch */
  DbPage **ppPage,    /* Write a pointer to the page here */
  int flags           /* PAGER_ACQUIRE_XXX flags */
){
  int rc = SQLITE_OK;
  PgHdr *pPg = 0;
  u32 iFrame = 0;                 /* Frame to read from WAL file */
  const int noContent = (flags & PAGER_ACQUIRE_NOCONTENT);

  /* It is acceptable to use a read-only (mmap) page for any page except
  ** page 1 if there is no write-transaction open or the ACQUIRE_READONLY
  ** flag was specified by the caller. And so long as the db is not a 
  ** temporary or in-memory database.  */
  const int bMmapOk = (pgno!=1 && USEFETCH(pPager)
   && (pPager->eState==PAGER_READER || (flags & PAGER_ACQUIRE_READONLY))
#ifdef SQLITE_HAS_CODEC
   && pPager->xCodec==0
#endif
  );

  assert( pPager->eState>=PAGER_READER );
  assert( assert_pager_state(pPager) );
................................................................................
  if( nPagePerSector>1 ){
    Pgno nPageCount;          /* Total number of pages in database file */
    Pgno pg1;                 /* First page of the sector pPg is located on. */
    int nPage = 0;            /* Number of pages starting at pg1 to journal */
    int ii;                   /* Loop counter */
    int needSync = 0;         /* True if any page has PGHDR_NEED_SYNC */

    /* Set the doNotSyncSpill flag to 1. This is because we cannot allow
    ** a journal header to be written between the pages journaled by
    ** this function.
    */
    assert( !MEMDB );
    assert( pPager->doNotSyncSpill==0 );
    pPager->doNotSyncSpill++;

    /* This trick assumes that both the page-size and sector-size are
    ** an integer power of 2. It sets variable pg1 to the identifier
    ** of the first page of the sector pPg is located on.
    */
    pg1 = ((pPg->pgno-1) & ~(nPagePerSector-1)) + 1;

................................................................................
        if( pPage ){
          pPage->flags |= PGHDR_NEED_SYNC;
          sqlite3PagerUnref(pPage);
        }
      }
    }

    assert( pPager->doNotSyncSpill==1 );
    pPager->doNotSyncSpill--;
  }else{
    rc = pager_write(pDbPage);
  }
  return rc;
}

/*
................................................................................
  pPager->xCodecFree = xCodecFree;
  pPager->pCodec = pCodec;
  pagerReportSize(pPager);
}
SQLITE_PRIVATE void *sqlite3PagerGetCodec(Pager *pPager){
  return pPager->pCodec;
}
#endif






















#ifndef SQLITE_OMIT_AUTOVACUUM
/*
** Move the page pPg to location pgno in the file.
**
** There must be no references to the page previously located at
** pgno (which we call pPgOld) though that page is allowed to be
................................................................................
*/
SQLITE_PRIVATE int sqlite3PagerWalFramesize(Pager *pPager){
  assert( pPager->eState==PAGER_READER );
  return sqlite3WalFramesize(pPager->pWal);
}
#endif

#ifdef SQLITE_HAS_CODEC
/*
** This function is called by the wal module when writing page content
** into the log file.
**
** This function returns a pointer to a buffer containing the encrypted
** page content. If a malloc fails, this function may return NULL.
*/
SQLITE_PRIVATE void *sqlite3PagerCodec(PgHdr *pPg){
  void *aData = 0;
  CODEC2(pPg->pPager, pPg->pData, pPg->pgno, 6, return 0, aData);
  return aData;
}
#endif /* SQLITE_HAS_CODEC */

#endif /* SQLITE_OMIT_DISKIO */

/************** End of pager.c ***********************************************/
/************** Begin file wal.c *********************************************/
/*
** 2010 February 1
**
................................................................................
  /* If another connection has written to the database file since the
  ** time the read transaction on this connection was started, then
  ** the write is disallowed.
  */
  if( memcmp(&pWal->hdr, (void *)walIndexHdr(pWal), sizeof(WalIndexHdr))!=0 ){
    walUnlockExclusive(pWal, WAL_WRITE_LOCK, 1);
    pWal->writeLock = 0;
    rc = SQLITE_BUSY;
  }

  return rc;
}

/*
** End a write transaction.  The commit has already been done.  This
................................................................................
  u16 aiIdx[BTCURSOR_MAX_DEPTH];        /* Current index in apPage[i] */
  MemPage *apPage[BTCURSOR_MAX_DEPTH];  /* Pages from root to current page */
};

/*
** Potential values for BtCursor.eState.
**
** CURSOR_VALID:
**   Cursor points to a valid entry. getPayload() etc. may be called.
**
** CURSOR_INVALID:
**   Cursor does not point to a valid entry. This can happen (for example) 
**   because the table is empty or because BtreeCursorFirst() has not been
**   called.
**








** CURSOR_REQUIRESEEK:
**   The table that this cursor was opened on still exists, but has been 
**   modified since the cursor was last used. The cursor position is saved
**   in variables BtCursor.pKey and BtCursor.nKey. When a cursor is in 
**   this state, restoreCursorPosition() can be called to attempt to
**   seek the cursor to the saved position.
**
................................................................................
**   on a different connection that shares the BtShared cache with this
**   cursor.  The error has left the cache in an inconsistent state.
**   Do nothing else with this cursor.  Any attempt to use the cursor
**   should return the error code stored in BtCursor.skip
*/
#define CURSOR_INVALID           0
#define CURSOR_VALID             1

#define CURSOR_REQUIRESEEK       2
#define CURSOR_FAULT             3

/* 
** The database page the PENDING_BYTE occupies. This page is never used.
*/
# define PENDING_BYTE_PAGE(pBt) PAGER_MJ_PGNO(pBt)

/*
................................................................................
  }
  pCur->eState = CURSOR_INVALID;
  rc = btreeMoveto(pCur, pCur->pKey, pCur->nKey, 0, &pCur->skipNext);
  if( rc==SQLITE_OK ){
    sqlite3_free(pCur->pKey);
    pCur->pKey = 0;
    assert( pCur->eState==CURSOR_VALID || pCur->eState==CURSOR_INVALID );



  }
  return rc;
}

#define restoreCursorPosition(p) \
  (p->eState>=CURSOR_REQUIRESEEK ? \
         btreeRestoreCursorPosition(p) : \
................................................................................
  int rc;

  rc = restoreCursorPosition(pCur);
  if( rc ){
    *pHasMoved = 1;
    return rc;
  }
  if( pCur->eState!=CURSOR_VALID || pCur->skipNext!=0 ){
    *pHasMoved = 1;
  }else{
    *pHasMoved = 0;
  }
  return SQLITE_OK;
}

................................................................................

  pInfo->pCell = pCell;
  assert( pPage->leaf==0 || pPage->leaf==1 );
  n = pPage->childPtrSize;
  assert( n==4-4*pPage->leaf );
  if( pPage->intKey ){
    if( pPage->hasData ){

      n += getVarint32(&pCell[n], nPayload);
    }else{
      nPayload = 0;
    }
    n += getVarint(&pCell[n], (u64*)&pInfo->nKey);
    pInfo->nData = nPayload;
  }else{
    pInfo->nData = 0;
................................................................................
    /* Always defragment highly fragmented pages */
    rc = defragmentPage(pPage);
    if( rc ) return rc;
    top = get2byteNotZero(&data[hdr+5]);
  }else if( gap+2<=top ){
    /* Search the freelist looking for a free slot big enough to satisfy 
    ** the request. The allocation is made from the first free slot in 
    ** the list that is large enough to accomadate it.
    */
    int pc, addr;
    for(addr=hdr+1; (pc = get2byte(&data[addr]))>0; addr=pc){
      int size;            /* Size of the free slot */
      if( pc>usableSize-4 || pc<addr+4 ){
        return SQLITE_CORRUPT_BKPT;
      }
................................................................................
** means we have started to be concerned about content and the disk
** read should occur at that point.
*/
static int btreeGetPage(
  BtShared *pBt,       /* The btree */
  Pgno pgno,           /* Number of the page to fetch */
  MemPage **ppPage,    /* Return the page in this parameter */
  int noContent,       /* Do not load page content if true */
  int bReadonly        /* True if a read-only (mmap) page is ok */
){
  int rc;
  DbPage *pDbPage;
  int flags = (noContent ? PAGER_ACQUIRE_NOCONTENT : 0) 
            | (bReadonly ? PAGER_ACQUIRE_READONLY : 0);

  assert( noContent==0 || bReadonly==0 );

  assert( sqlite3_mutex_held(pBt->mutex) );
  rc = sqlite3PagerAcquire(pBt->pPager, pgno, (DbPage**)&pDbPage, flags);
  if( rc ) return rc;
  *ppPage = btreePageFromDbPage(pDbPage, pgno, pBt);
  return SQLITE_OK;
}

................................................................................
** If an error occurs, then the value *ppPage is set to is undefined. It
** may remain unchanged, or it may be set to an invalid value.
*/
static int getAndInitPage(
  BtShared *pBt,                  /* The database file */
  Pgno pgno,                      /* Number of the page to get */
  MemPage **ppPage,               /* Write the page pointer here */
  int bReadonly                   /* True if a read-only (mmap) page is ok */
){
  int rc;
  assert( sqlite3_mutex_held(pBt->mutex) );


  if( pgno>btreePagecount(pBt) ){
    rc = SQLITE_CORRUPT_BKPT;
  }else{
    rc = btreeGetPage(pBt, pgno, ppPage, 0, bReadonly);
    if( rc==SQLITE_OK ){
      rc = btreeInitPage(*ppPage);
      if( rc!=SQLITE_OK ){
        releasePage(*ppPage);
      }
    }
  }
................................................................................
** how well the database resists damage due to OS crashes and power
** failures.  Level 1 is the same as asynchronous (no syncs() occur and
** there is a high probability of damage)  Level 2 is the default.  There
** is a very low but non-zero probability of damage.  Level 3 reduces the
** probability of damage to near zero but with a write performance reduction.
*/
#ifndef SQLITE_OMIT_PAGER_PRAGMAS
SQLITE_PRIVATE int sqlite3BtreeSetSafetyLevel(
  Btree *p,              /* The btree to set the safety level on */
  int level,             /* PRAGMA synchronous.  1=OFF, 2=NORMAL, 3=FULL */
  int fullSync,          /* PRAGMA fullfsync. */
  int ckptFullSync       /* PRAGMA checkpoint_fullfync */
){
  BtShared *pBt = p->pBt;
  assert( sqlite3_mutex_held(p->db->mutex) );
  assert( level>=1 && level<=3 );
  sqlite3BtreeEnter(p);
  sqlite3PagerSetSafetyLevel(pBt->pPager, level, fullSync, ckptFullSync);

  sqlite3BtreeLeave(p);
  return SQLITE_OK;
}
#endif

/*
** Return TRUE if the given btree is set to safety level 1.  In other
................................................................................
  int nPageFile = 0;   /* Number of pages in the database file */
  int nPageHeader;     /* Number of pages in the database according to hdr */

  assert( sqlite3_mutex_held(pBt->mutex) );
  assert( pBt->pPage1==0 );
  rc = sqlite3PagerSharedLock(pBt->pPager);
  if( rc!=SQLITE_OK ) return rc;
  rc = btreeGetPage(pBt, 1, &pPage1, 0, 0);
  if( rc!=SQLITE_OK ) return rc;

  /* Do some checking to help insure the file we opened really is
  ** a valid database file. 
  */
  nPage = nPageHeader = get4byte(28+(u8*)pPage1->aData);
  sqlite3PagerPagecount(pBt->pPager, &nPageFile);
................................................................................
  }

  /* Fix the database pointer on page iPtrPage that pointed at iDbPage so
  ** that it points at iFreePage. Also fix the pointer map entry for
  ** iPtrPage.
  */
  if( eType!=PTRMAP_ROOTPAGE ){
    rc = btreeGetPage(pBt, iPtrPage, &pPtrPage, 0, 0);
    if( rc!=SQLITE_OK ){
      return rc;
    }
    rc = sqlite3PagerWrite(pPtrPage->pDbPage);
    if( rc!=SQLITE_OK ){
      releasePage(pPtrPage);
      return rc;
................................................................................
      }
    } else {
      Pgno iFreePg;             /* Index of free page to move pLastPg to */
      MemPage *pLastPg;
      u8 eMode = BTALLOC_ANY;   /* Mode parameter for allocateBtreePage() */
      Pgno iNear = 0;           /* nearby parameter for allocateBtreePage() */

      rc = btreeGetPage(pBt, iLastPg, &pLastPg, 0, 0);
      if( rc!=SQLITE_OK ){
        return rc;
      }

      /* If bCommit is zero, this loop runs exactly once and page pLastPg
      ** is swapped with the first free page pulled off the free list.
      **
................................................................................
  }
  sqlite3BtreeLeave(p);
  return rc;
}

/*
** This routine is called prior to sqlite3PagerCommit when a transaction
** is commited for an auto-vacuum database.
**
** If SQLITE_OK is returned, then *pnTrunc is set to the number of pages
** the database file should be truncated to during the commit process. 
** i.e. the database has been reorganized so that only the first *pnTrunc
** pages are in use.
*/
static int autoVacuumCommit(BtShared *pBt){
................................................................................

/*
** This function is called from both BtreeCommitPhaseTwo() and BtreeRollback()
** at the conclusion of a transaction.
*/
static void btreeEndTransaction(Btree *p){
  BtShared *pBt = p->pBt;

  assert( sqlite3BtreeHoldsMutex(p) );

#ifndef SQLITE_OMIT_AUTOVACUUM
  pBt->bDoTruncate = 0;
#endif
  if( p->inTrans>TRANS_NONE && p->db->activeVdbeCnt>1 ){
    /* If there are other active statements that belong to this database
    ** handle, downgrade to a read-only transaction. The other statements
    ** may still be reading from the database.  */
    downgradeAllSharedCacheTableLocks(p);
    p->inTrans = TRANS_READ;
  }else{
    /* If the handle had any kind of transaction open, decrement the 
................................................................................
    if( rc2!=SQLITE_OK ){
      rc = rc2;
    }

    /* The rollback may have destroyed the pPage1->aData value.  So
    ** call btreeGetPage() on page 1 again to make
    ** sure pPage1->aData is set correctly. */
    if( btreeGetPage(pBt, 1, &pPage1, 0, 0)==SQLITE_OK ){
      int nPage = get4byte(28+(u8*)pPage1->aData);
      testcase( nPage==0 );
      if( nPage==0 ) sqlite3PagerPagecount(pBt->pPager, &nPage);
      testcase( pBt->nPage!=nPage );
      pBt->nPage = nPage;
      releasePage(pPage1);
    }
................................................................................
      }
    }
  }
#endif

  assert( next==0 || rc==SQLITE_DONE );
  if( rc==SQLITE_OK ){
    rc = btreeGetPage(pBt, ovfl, &pPage, 0, (ppPage==0));
    assert( rc==SQLITE_OK || pPage==0 );
    if( rc==SQLITE_OK ){
      next = get4byte(pPage->aData);
    }
  }

  *pPgnoNext = next;
................................................................................
          memcpy(aWrite, aSave, 4);
        }else
#endif

        {
          DbPage *pDbPage;
          rc = sqlite3PagerAcquire(pBt->pPager, nextPage, &pDbPage,
              (eOp==0 ? PAGER_ACQUIRE_READONLY : 0)
          );
          if( rc==SQLITE_OK ){
            aPayload = sqlite3PagerGetData(pDbPage);
            nextPage = get4byte(aPayload);
            rc = copyPayload(&aPayload[offset+4], pBuf, a, eOp, pDbPage);
            sqlite3PagerUnref(pDbPage);
            offset = 0;
................................................................................
  assert( cursorHoldsMutex(pCur) );
  assert( pCur->eState==CURSOR_VALID );
  assert( pCur->iPage<BTCURSOR_MAX_DEPTH );
  assert( pCur->iPage>=0 );
  if( pCur->iPage>=(BTCURSOR_MAX_DEPTH-1) ){
    return SQLITE_CORRUPT_BKPT;
  }
  rc = getAndInitPage(pBt, newPgno, &pNewPage, (pCur->wrFlag==0));

  if( rc ) return rc;
  pCur->apPage[i+1] = pNewPage;
  pCur->aiIdx[i+1] = 0;
  pCur->iPage++;

  pCur->info.nSize = 0;
  pCur->validNKey = 0;
................................................................................
      releasePage(pCur->apPage[i]);
    }
    pCur->iPage = 0;
  }else if( pCur->pgnoRoot==0 ){
    pCur->eState = CURSOR_INVALID;
    return SQLITE_OK;
  }else{
    rc = getAndInitPage(pBt, pCur->pgnoRoot, &pCur->apPage[0], pCur->wrFlag==0);

    if( rc!=SQLITE_OK ){
      pCur->eState = CURSOR_INVALID;
      return rc;
    }
    pCur->iPage = 0;

    /* If pCur->pKeyInfo is not NULL, then the caller that opened this cursor
................................................................................
*/
SQLITE_PRIVATE int sqlite3BtreeNext(BtCursor *pCur, int *pRes){
  int rc;
  int idx;
  MemPage *pPage;

  assert( cursorHoldsMutex(pCur) );



  rc = restoreCursorPosition(pCur);
  if( rc!=SQLITE_OK ){

    return rc;
  }
  assert( pRes!=0 );
  if( CURSOR_INVALID==pCur->eState ){
    *pRes = 1;
    return SQLITE_OK;
  }



  if( pCur->skipNext>0 ){
    pCur->skipNext = 0;
    *pRes = 0;
    return SQLITE_OK;
  }
  pCur->skipNext = 0;



  pPage = pCur->apPage[pCur->iPage];
  idx = ++pCur->aiIdx[pCur->iPage];
  assert( pPage->isInit );

  /* If the database file is corrupt, it is possible for the value of idx 
  ** to be invalid here. This can only occur if a second cursor modifies
................................................................................
  testcase( idx>pPage->nCell );

  pCur->info.nSize = 0;
  pCur->validNKey = 0;
  if( idx>=pPage->nCell ){
    if( !pPage->leaf ){
      rc = moveToChild(pCur, get4byte(&pPage->aData[pPage->hdrOffset+8]));


      if( rc ) return rc;

      rc = moveToLeftmost(pCur);
      *pRes = 0;
      return rc;
    }
    do{
      if( pCur->iPage==0 ){
        *pRes = 1;
................................................................................
** this routine was called, then set *pRes=1.
*/
SQLITE_PRIVATE int sqlite3BtreePrevious(BtCursor *pCur, int *pRes){
  int rc;
  MemPage *pPage;

  assert( cursorHoldsMutex(pCur) );





  rc = restoreCursorPosition(pCur);
  if( rc!=SQLITE_OK ){

    return rc;
  }
  pCur->atLast = 0;

  if( CURSOR_INVALID==pCur->eState ){
    *pRes = 1;
    return SQLITE_OK;
  }



  if( pCur->skipNext<0 ){
    pCur->skipNext = 0;
    *pRes = 0;
    return SQLITE_OK;
  }
  pCur->skipNext = 0;



  pPage = pCur->apPage[pCur->iPage];
  assert( pPage->isInit );
  if( !pPage->leaf ){
    int idx = pCur->aiIdx[pCur->iPage];
    rc = moveToChild(pCur, get4byte(findCell(pPage, idx)));
    if( rc ){

      return rc;
    }
    rc = moveToRightmost(pCur);
  }else{
    while( pCur->aiIdx[pCur->iPage]==0 ){
      if( pCur->iPage==0 ){
        pCur->eState = CURSOR_INVALID;
................................................................................
      }else{
        iTrunk = get4byte(&pPage1->aData[32]);
      }
      testcase( iTrunk==mxPage );
      if( iTrunk>mxPage ){
        rc = SQLITE_CORRUPT_BKPT;
      }else{
        rc = btreeGetPage(pBt, iTrunk, &pTrunk, 0, 0);
      }
      if( rc ){
        pTrunk = 0;
        goto end_allocate_page;
      }
      assert( pTrunk!=0 );
      assert( pTrunk->aData!=0 );
................................................................................
          MemPage *pNewTrunk;
          Pgno iNewTrunk = get4byte(&pTrunk->aData[8]);
          if( iNewTrunk>mxPage ){ 
            rc = SQLITE_CORRUPT_BKPT;
            goto end_allocate_page;
          }
          testcase( iNewTrunk==mxPage );
          rc = btreeGetPage(pBt, iNewTrunk, &pNewTrunk, 0, 0);
          if( rc!=SQLITE_OK ){
            goto end_allocate_page;
          }
          rc = sqlite3PagerWrite(pNewTrunk->pDbPage);
          if( rc!=SQLITE_OK ){
            releasePage(pNewTrunk);
            goto end_allocate_page;
................................................................................
                 *pPgno, closest+1, k, pTrunk->pgno, n-1));
          rc = sqlite3PagerWrite(pTrunk->pDbPage);
          if( rc ) goto end_allocate_page;
          if( closest<k-1 ){
            memcpy(&aData[8+closest*4], &aData[4+k*4], 4);
          }
          put4byte(&aData[4], k-1);
          noContent = !btreeGetHasContent(pBt, *pPgno);
          rc = btreeGetPage(pBt, *pPgno, ppPage, noContent, 0);
          if( rc==SQLITE_OK ){
            rc = sqlite3PagerWrite((*ppPage)->pDbPage);
            if( rc!=SQLITE_OK ){
              releasePage(*ppPage);
            }
          }
          searchList = 0;
................................................................................
    **
    ** Note that the pager will not actually attempt to load or journal 
    ** content for any page that really does lie past the end of the database
    ** file on disk. So the effects of disabling the no-content optimization
    ** here are confined to those pages that lie between the end of the
    ** database image and the end of the database file.
    */
    int bNoContent = (0==IfNotOmitAV(pBt->bDoTruncate));

    rc = sqlite3PagerWrite(pBt->pPage1->pDbPage);
    if( rc ) return rc;
    pBt->nPage++;
    if( pBt->nPage==PENDING_BYTE_PAGE(pBt) ) pBt->nPage++;

#ifndef SQLITE_OMIT_AUTOVACUUM
................................................................................
      /* If *pPgno refers to a pointer-map page, allocate two new pages
      ** at the end of the file instead of one. The first allocated page
      ** becomes a new pointer-map page, the second is used by the caller.
      */
      MemPage *pPg = 0;
      TRACE(("ALLOCATE: %d from end of file (pointer-map page)\n", pBt->nPage));
      assert( pBt->nPage!=PENDING_BYTE_PAGE(pBt) );
      rc = btreeGetPage(pBt, pBt->nPage, &pPg, bNoContent, 0);
      if( rc==SQLITE_OK ){
        rc = sqlite3PagerWrite(pPg->pDbPage);
        releasePage(pPg);
      }
      if( rc ) return rc;
      pBt->nPage++;
      if( pBt->nPage==PENDING_BYTE_PAGE(pBt) ){ pBt->nPage++; }
    }
#endif
    put4byte(28 + (u8*)pBt->pPage1->aData, pBt->nPage);
    *pPgno = pBt->nPage;

    assert( *pPgno!=PENDING_BYTE_PAGE(pBt) );
    rc = btreeGetPage(pBt, *pPgno, ppPage, bNoContent, 0);
    if( rc ) return rc;
    rc = sqlite3PagerWrite((*ppPage)->pDbPage);
    if( rc!=SQLITE_OK ){
      releasePage(*ppPage);
    }
    TRACE(("ALLOCATE: %d from end of file\n", *pPgno));
  }
................................................................................
  nFree = get4byte(&pPage1->aData[36]);
  put4byte(&pPage1->aData[36], nFree+1);

  if( pBt->btsFlags & BTS_SECURE_DELETE ){
    /* If the secure_delete option is enabled, then
    ** always fully overwrite deleted information with zeros.
    */
    if( (!pPage && ((rc = btreeGetPage(pBt, iPage, &pPage, 0, 0))!=0) )
     ||            ((rc = sqlite3PagerWrite(pPage->pDbPage))!=0)
    ){
      goto freepage_out;
    }
    memset(pPage->aData, 0, pPage->pBt->pageSize);
  }

................................................................................
  ** first trunk page in the current free-list. This block tests if it
  ** is possible to add the page as a new free-list leaf.
  */
  if( nFree!=0 ){
    u32 nLeaf;                /* Initial number of leaf cells on trunk page */

    iTrunk = get4byte(&pPage1->aData[32]);
    rc = btreeGetPage(pBt, iTrunk, &pTrunk, 0, 0);
    if( rc!=SQLITE_OK ){
      goto freepage_out;
    }

    nLeaf = get4byte(&pTrunk->aData[4]);
    assert( pBt->usableSize>32 );
    if( nLeaf > (u32)pBt->usableSize/4 - 2 ){
................................................................................

  /* If control flows to this point, then it was not possible to add the
  ** the page being freed as a leaf page of the first trunk in the free-list.
  ** Possibly because the free-list is empty, or possibly because the 
  ** first trunk in the free-list is full. Either way, the page being freed
  ** will become the new first trunk page in the free-list.
  */
  if( pPage==0 && SQLITE_OK!=(rc = btreeGetPage(pBt, iPage, &pPage, 0, 0)) ){
    goto freepage_out;
  }
  rc = sqlite3PagerWrite(pPage->pDbPage);
  if( rc!=SQLITE_OK ){
    goto freepage_out;
  }
  put4byte(pPage->aData, iTrunk);
................................................................................
      rc = saveAllCursors(pBt, 0, 0);
      releasePage(pPageMove);
      if( rc!=SQLITE_OK ){
        return rc;
      }

      /* Move the page currently at pgnoRoot to pgnoMove. */
      rc = btreeGetPage(pBt, pgnoRoot, &pRoot, 0, 0);
      if( rc!=SQLITE_OK ){
        return rc;
      }
      rc = ptrmapGet(pBt, pgnoRoot, &eType, &iPtrPage);
      if( eType==PTRMAP_ROOTPAGE || eType==PTRMAP_FREEPAGE ){
        rc = SQLITE_CORRUPT_BKPT;
      }
................................................................................
      rc = relocatePage(pBt, pRoot, eType, iPtrPage, pgnoMove, 0);
      releasePage(pRoot);

      /* Obtain the page at pgnoRoot */
      if( rc!=SQLITE_OK ){
        return rc;
      }
      rc = btreeGetPage(pBt, pgnoRoot, &pRoot, 0, 0);
      if( rc!=SQLITE_OK ){
        return rc;
      }
      rc = sqlite3PagerWrite(pRoot->pDbPage);
      if( rc!=SQLITE_OK ){
        releasePage(pRoot);
        return rc;
................................................................................
  ** This error is caught long before control reaches this point.
  */
  if( NEVER(pBt->pCursor) ){
    sqlite3ConnectionBlocked(p->db, pBt->pCursor->pBtree->db);
    return SQLITE_LOCKED_SHAREDCACHE;
  }

  rc = btreeGetPage(pBt, (Pgno)iTable, &pPage, 0, 0);
  if( rc ) return rc;
  rc = sqlite3BtreeClearTable(p, iTable, 0);
  if( rc ){
    releasePage(pPage);
    return rc;
  }

................................................................................
      }else{
        /* The table being dropped does not have the largest root-page
        ** number in the database. So move the page that does into the 
        ** gap left by the deleted root-page.
        */
        MemPage *pMove;
        releasePage(pPage);
        rc = btreeGetPage(pBt, maxRootPgno, &pMove, 0, 0);
        if( rc!=SQLITE_OK ){
          return rc;
        }
        rc = relocatePage(pBt, pMove, PTRMAP_ROOTPAGE, 0, iTable, 0);
        releasePage(pMove);
        if( rc!=SQLITE_OK ){
          return rc;
        }
        pMove = 0;
        rc = btreeGetPage(pBt, maxRootPgno, &pMove, 0, 0);
        freePage(pMove, &rc);
        releasePage(pMove);
        if( rc!=SQLITE_OK ){
          return rc;
        }
        *piMoved = maxRootPgno;
      }
................................................................................
    sqlite3StrAccumAppend(&pCheck->errMsg, "\n", 1);
  }
  if( zMsg1 ){
    sqlite3StrAccumAppend(&pCheck->errMsg, zMsg1, -1);
  }
  sqlite3VXPrintf(&pCheck->errMsg, 1, zFormat, ap);
  va_end(ap);
  if( pCheck->errMsg.mallocFailed ){
    pCheck->mallocFailed = 1;
  }
}
#endif /* SQLITE_OMIT_INTEGRITY_CHECK */

#ifndef SQLITE_OMIT_INTEGRITY_CHECK

................................................................................

  /* Check that the page exists
  */
  pBt = pCheck->pBt;
  usableSize = pBt->usableSize;
  if( iPage==0 ) return 0;
  if( checkRef(pCheck, iPage, zParentContext) ) return 0;
  if( (rc = btreeGetPage(pBt, (Pgno)iPage, &pPage, 0, 0))!=0 ){
    checkAppendMsg(pCheck, zContext,
       "unable to get the page. error code=%d", rc);
    return 0;
  }

  /* Clear MemPage.isInit to make sure the corruption detection code in
  ** btreeInitPage() is executed.  */
................................................................................
**    May you share freely, never taking more than you give.
**
*************************************************************************
** This file contains the implementation of the sqlite3_backup_XXX() 
** API functions and the related features.
*/

/* Macro to find the minimum of two numeric values.
*/
#ifndef MIN
# define MIN(x,y) ((x)<(y)?(x):(y))
#endif

/*
** Structure allocated for each backup operation.
*/
struct sqlite3_backup {
  sqlite3* pDestDb;        /* Destination database handle */
  Btree *pDest;            /* Destination b-tree file */
  u32 iDestSchema;         /* Original schema cookie in destination */
................................................................................
    nSrcPage = (int)sqlite3BtreeLastPage(p->pSrc);
    assert( nSrcPage>=0 );
    for(ii=0; (nPage<0 || ii<nPage) && p->iNext<=(Pgno)nSrcPage && !rc; ii++){
      const Pgno iSrcPg = p->iNext;                 /* Source page number */
      if( iSrcPg!=PENDING_BYTE_PAGE(p->pSrc->pBt) ){
        DbPage *pSrcPg;                             /* Source page object */
        rc = sqlite3PagerAcquire(pSrcPager, iSrcPg, &pSrcPg,
                                 PAGER_ACQUIRE_READONLY);
        if( rc==SQLITE_OK ){
          rc = backupOnePage(p, iSrcPg, sqlite3PagerGetData(pSrcPg), 0);
          sqlite3PagerUnref(pSrcPg);
        }
      }
      p->iNext++;
    }
................................................................................
  }

  /* If one value is a number and the other is not, the number is less.
  ** If both are numbers, compare as reals if one is a real, or as integers
  ** if both values are integers.
  */
  if( combined_flags&(MEM_Int|MEM_Real) ){
    if( !(f1&(MEM_Int|MEM_Real)) ){


      return 1;
    }
    if( !(f2&(MEM_Int|MEM_Real)) ){
      return -1;
    }
    if( (f1 & f2 & MEM_Int)==0 ){
      double r1, r2;
      if( (f1&MEM_Real)==0 ){
        r1 = (double)pMem1->u.i;
      }else{
        r1 = pMem1->r;
      }
      if( (f2&MEM_Real)==0 ){


        r2 = (double)pMem2->u.i;
      }else{
        r2 = pMem2->r;

      }
      if( r1<r2 ) return -1;
      if( r1>r2 ) return 1;
      return 0;
    }else{
      assert( f1&MEM_Int );
      assert( f2&MEM_Int );
      if( pMem1->u.i < pMem2->u.i ) return -1;
      if( pMem1->u.i > pMem2->u.i ) return 1;
      return 0;
    }
  }

  /* If one value is a string and the other is a blob, the string is less.
  ** If both are strings, compare using the collating functions.
  */
  if( combined_flags&MEM_Str ){
    if( (f1 & MEM_Str)==0 ){
................................................................................
** Resolve label "x" to be the address of the next instruction to
** be inserted.  The parameter "x" must have been obtained from
** a prior call to sqlite3VdbeMakeLabel().
*/
SQLITE_PRIVATE void sqlite3VdbeResolveLabel(Vdbe *p, int x){
  int j = -1-x;
  assert( p->magic==VDBE_MAGIC_INIT );
  assert( j>=0 && j<p->nLabel );
  if( p->aLabel ){
    p->aLabel[j] = p->nOp;
  }
}

/*
** Mark the VDBE as one that can only be run one time.
*/
................................................................................
*/
static void resolveP2Values(Vdbe *p, int *pMaxFuncArgs){
  int i;
  int nMaxArgs = *pMaxFuncArgs;
  Op *pOp;
  int *aLabel = p->aLabel;
  p->readOnly = 1;

  for(pOp=p->aOp, i=p->nOp-1; i>=0; i--, pOp++){
    u8 opcode = pOp->opcode;

    pOp->opflags = sqlite3OpcodeProperty[opcode];
    if( opcode==OP_Function || opcode==OP_AggStep ){




      if( pOp->p5>nMaxArgs ) nMaxArgs = pOp->p5;
    }else if( (opcode==OP_Transaction && pOp->p2!=0) || opcode==OP_Vacuum ){
















      p->readOnly = 0;



#ifndef SQLITE_OMIT_VIRTUALTABLE
    }else if( opcode==OP_VUpdate ){
      if( pOp->p2>nMaxArgs ) nMaxArgs = pOp->p2;


    }else if( opcode==OP_VFilter ){
      int n;
      assert( p->nOp - i >= 3 );
      assert( pOp[-1].opcode==OP_Integer );
      n = pOp[-1].p1;
      if( n>nMaxArgs ) nMaxArgs = n;


#endif
    }else if( opcode==OP_Next || opcode==OP_SorterNext ){


      pOp->p4.xAdvance = sqlite3BtreeNext;
      pOp->p4type = P4_ADVANCE;
    }else if( opcode==OP_Prev ){



      pOp->p4.xAdvance = sqlite3BtreePrevious;
      pOp->p4type = P4_ADVANCE;

    }



    if( (pOp->opflags & OPFLG_JUMP)!=0 && pOp->p2<0 ){
      assert( -1-pOp->p2<p->nLabel );
      pOp->p2 = aLabel[-1-pOp->p2];
    }
  }
  sqlite3DbFree(p->db, p->aLabel);
  p->aLabel = 0;

  *pMaxFuncArgs = nMaxArgs;

}

/*
** Return the address of the next instruction to be inserted.
*/
SQLITE_PRIVATE int sqlite3VdbeCurrentAddr(Vdbe *p){
  assert( p->magic==VDBE_MAGIC_INIT );
................................................................................
}

/*
** Change the P2 operand of instruction addr so that it points to
** the address of the next instruction to be coded.
*/
SQLITE_PRIVATE void sqlite3VdbeJumpHere(Vdbe *p, int addr){
  assert( addr>=0 || p->db->mallocFailed );
  if( addr>=0 ) sqlite3VdbeChangeP2(p, addr, p->nOp);
}


/*
** If the input FuncDef structure is ephemeral, then free it.  If
** the FuncDef is not ephermal, then do nothing.
*/
................................................................................
        sqlite3DbFree(db, p4);
        break;
      }
      case P4_MPRINTF: {
        if( db->pnBytesFreed==0 ) sqlite3_free(p4);
        break;
      }
      case P4_VDBEFUNC: {
        VdbeFunc *pVdbeFunc = (VdbeFunc *)p4;
        freeEphemeralFunction(db, pVdbeFunc->pFunc);
        if( db->pnBytesFreed==0 ) sqlite3VdbeDeleteAuxData(pVdbeFunc, 0);
        sqlite3DbFree(db, pVdbeFunc);
        break;
      }
      case P4_FUNCDEF: {
        freeEphemeralFunction(db, (FuncDef*)p4);
        break;
      }
      case P4_MEM: {
        if( db->pnBytesFreed==0 ){
          sqlite3ValueFree((sqlite3_value*)p4);
................................................................................
    ** that was cast to a (const char *). */
    pOp->p4.i = SQLITE_PTR_TO_INT(zP4);
    pOp->p4type = P4_INT32;
  }else if( zP4==0 ){
    pOp->p4.p = 0;
    pOp->p4type = P4_NOTUSED;
  }else if( n==P4_KEYINFO ){
    KeyInfo *pKeyInfo;
    int nField, nByte;

    nField = ((KeyInfo*)zP4)->nField;
    nByte = sizeof(*pKeyInfo) + (nField-1)*sizeof(pKeyInfo->aColl[0]) + nField;
    pKeyInfo = sqlite3DbMallocRaw(0, nByte);
    pOp->p4.pKeyInfo = pKeyInfo;
    if( pKeyInfo ){
      u8 *aSortOrder;
      memcpy((char*)pKeyInfo, zP4, nByte - nField);
      aSortOrder = pKeyInfo->aSortOrder;
      assert( aSortOrder!=0 );
      pKeyInfo->aSortOrder = (unsigned char*)&pKeyInfo->aColl[nField];
      memcpy(pKeyInfo->aSortOrder, aSortOrder, nField);


      pOp->p4type = P4_KEYINFO;
    }else{
      p->db->mallocFailed = 1;
      pOp->p4type = P4_NOTUSED;
    }
  }else if( n==P4_KEYINFO_HANDOFF ){
    pOp->p4.p = (void*)zP4;
................................................................................
    releaseMemArray(&p->aMem[1], p->nMem);
  }
  while( p->pDelFrame ){
    VdbeFrame *pDel = p->pDelFrame;
    p->pDelFrame = pDel->pParent;
    sqlite3VdbeFrameDelete(pDel);
  }




}

/*
** Clean up the VM after execution.
**
** This routine will automatically close any cursors, lists, and/or
** sorters that were left open.  It also deletes the values of
................................................................................

  /* Before doing anything else, call the xSync() callback for any
  ** virtual module tables written in this transaction. This has to
  ** be done before determining whether a master journal file is 
  ** required, as an xSync() callback may add an attached database
  ** to the transaction.
  */
  rc = sqlite3VtabSync(db, &p->zErrMsg);

  /* This loop determines (a) if the commit hook should be invoked and
  ** (b) how many database files have open write transactions, not 
  ** including the temp database. (b) is important because if more than 
  ** one database file has an open write transaction, a master journal
  ** file is required for an atomic commit.
  */ 
................................................................................
  }
#endif

  return rc;
}

/* 
** This routine checks that the sqlite3.activeVdbeCnt count variable
** matches the number of vdbe's in the list sqlite3.pVdbe that are
** currently active. An assertion fails if the two counts do not match.
** This is an internal self-check only - it is not an essential processing
** step.
**
** This is a no-op if NDEBUG is defined.
*/
#ifndef NDEBUG
static void checkActiveVdbeCnt(sqlite3 *db){
  Vdbe *p;
  int cnt = 0;
  int nWrite = 0;

  p = db->pVdbe;
  while( p ){
    if( p->magic==VDBE_MAGIC_RUN && p->pc>=0 ){
      cnt++;
      if( p->readOnly==0 ) nWrite++;

    }
    p = p->pNext;
  }
  assert( cnt==db->activeVdbeCnt );
  assert( nWrite==db->writeVdbeCnt );

}
#else
#define checkActiveVdbeCnt(x)
#endif

/*
** If the Vdbe passed as the first argument opened a statement-transaction,
** close it now. Argument eOp must be either SAVEPOINT_ROLLBACK or
** SAVEPOINT_RELEASE. If it is SAVEPOINT_ROLLBACK, then the statement
** transaction is rolled back. If eOp is SAVEPOINT_RELEASE, then the 
** statement transaction is commtted.
**
** If an IO error occurs, an SQLITE_IOERR_XXX error code is returned. 
** Otherwise SQLITE_OK.
*/
SQLITE_PRIVATE int sqlite3VdbeCloseStatement(Vdbe *p, int eOp){
  sqlite3 *const db = p->db;
  int rc = SQLITE_OK;
................................................................................
    }

    /* If the statement transaction is being rolled back, also restore the 
    ** database handles deferred constraint counter to the value it had when 
    ** the statement transaction was opened.  */
    if( eOp==SAVEPOINT_ROLLBACK ){
      db->nDeferredCons = p->nStmtDefCons;

    }
  }
  return rc;
}

/*
** This function is called when a transaction opened by the database 
................................................................................
** If there are outstanding FK violations and this function returns 
** SQLITE_ERROR, set the result of the VM to SQLITE_CONSTRAINT_FOREIGNKEY
** and write an error message to it. Then return SQLITE_ERROR.
*/
#ifndef SQLITE_OMIT_FOREIGN_KEY
SQLITE_PRIVATE int sqlite3VdbeCheckFk(Vdbe *p, int deferred){
  sqlite3 *db = p->db;

  if( (deferred && db->nDeferredCons>0) || (!deferred && p->nFkConstraint>0) ){

    p->rc = SQLITE_CONSTRAINT_FOREIGNKEY;
    p->errorAction = OE_Abort;
    sqlite3SetString(&p->zErrMsg, db, "foreign key constraint failed");
    return SQLITE_ERROR;
  }
  return SQLITE_OK;
}
................................................................................
  if( p->aOnceFlag ) memset(p->aOnceFlag, 0, p->nOnceFlag);
  closeAllCursors(p);
  if( p->magic!=VDBE_MAGIC_RUN ){
    return SQLITE_OK;
  }
  checkActiveVdbeCnt(db);

  /* No commit or rollback needed if the program never started */

  if( p->pc>=0 ){
    int mrc;   /* Primary error code from p->rc */
    int eStatementOp = 0;
    int isSpecialError;            /* Set to true if a 'special' error */

    /* Lock all btrees used by the statement */
    sqlite3VdbeEnter(p);

................................................................................
    ** VM, then we do either a commit or rollback of the current transaction. 
    **
    ** Note: This block also runs if one of the special errors handled 
    ** above has occurred. 
    */
    if( !sqlite3VtabInSync(db) 
     && db->autoCommit 
     && db->writeVdbeCnt==(p->readOnly==0) 
    ){
      if( p->rc==SQLITE_OK || (p->errorAction==OE_Fail && !isSpecialError) ){
        rc = sqlite3VdbeCheckFk(p, 1);
        if( rc!=SQLITE_OK ){
          if( NEVER(p->readOnly) ){
            sqlite3VdbeLeave(p);
            return SQLITE_ERROR;
................................................................................
          sqlite3VdbeLeave(p);
          return SQLITE_BUSY;
        }else if( rc!=SQLITE_OK ){
          p->rc = rc;
          sqlite3RollbackAll(db, SQLITE_OK);
        }else{
          db->nDeferredCons = 0;


          sqlite3CommitInternalChanges(db);
        }
      }else{
        sqlite3RollbackAll(db, SQLITE_OK);
      }
      db->nStatement = 0;
    }else if( eStatementOp==0 ){
................................................................................

    /* Release the locks */
    sqlite3VdbeLeave(p);
  }

  /* We have successfully halted and closed the VM.  Record this fact. */
  if( p->pc>=0 ){
    db->activeVdbeCnt--;
    if( !p->readOnly ){
      db->writeVdbeCnt--;
    }

    assert( db->activeVdbeCnt>=db->writeVdbeCnt );

  }
  p->magic = VDBE_MAGIC_HALT;
  checkActiveVdbeCnt(db);
  if( p->db->mallocFailed ){
    p->rc = SQLITE_NOMEM;
  }

................................................................................
  ** by connection db have now been released. Call sqlite3ConnectionUnlocked() 
  ** to invoke any required unlock-notify callbacks.
  */
  if( db->autoCommit ){
    sqlite3ConnectionUnlocked(db);
  }

  assert( db->activeVdbeCnt>0 || db->autoCommit==0 || db->nStatement==0 );
  return (p->rc==SQLITE_BUSY ? SQLITE_BUSY : SQLITE_OK);
}


/*
** Each VDBE holds the result of the most recent sqlite3_step() call
** in p->rc.  This routine sets that result back to SQLITE_OK.
................................................................................
    assert( (rc & p->db->errMask)==rc );
  }
  sqlite3VdbeDelete(p);
  return rc;
}

/*
** Call the destructor for each auxdata entry in pVdbeFunc for which
** the corresponding bit in mask is clear.  Auxdata entries beyond 31
** are always destroyed.  To destroy all auxdata entries, call this
** routine with mask==0.










*/
SQLITE_PRIVATE void sqlite3VdbeDeleteAuxData(VdbeFunc *pVdbeFunc, int mask){
  int i;
  for(i=0; i<pVdbeFunc->nAux; i++){


    struct AuxData *pAux = &pVdbeFunc->apAux[i];
    if( (i>31 || !(mask&(((u32)1)<<i))) && pAux->pAux ){



      if( pAux->xDelete ){
        pAux->xDelete(pAux->pAux);
      }
      pAux->pAux = 0;



    }
  }
}

/*
** Free all memory associated with the Vdbe passed as the second argument,
** except for object itself, which is preserved.
................................................................................
** equal, then the keys are considered to be equal and
** the parts beyond the common prefix are ignored.
*/
SQLITE_PRIVATE int sqlite3VdbeRecordCompare(
  int nKey1, const void *pKey1, /* Left key */
  UnpackedRecord *pPKey2        /* Right key */
){
  int d1;            /* Offset into aKey[] of next data element */
  u32 idx1;          /* Offset into aKey[] of next header element */
  u32 szHdr1;        /* Number of bytes in header */
  int i = 0;
  int nField;
  int rc = 0;
  const unsigned char *aKey1 = (const unsigned char *)pKey1;
  KeyInfo *pKeyInfo;
  Mem mem1;

  pKeyInfo = pPKey2->pKeyInfo;
  mem1.enc = pKeyInfo->enc;
................................................................................
  ** impact, since this routine is a very high runner.  And so, we choose
  ** to ignore the compiler warnings and leave this variable uninitialized.
  */
  /*  mem1.u.i = 0;  // not needed, here to silence compiler warning */
  
  idx1 = getVarint32(aKey1, szHdr1);
  d1 = szHdr1;
  nField = pKeyInfo->nField;
  assert( pKeyInfo->aSortOrder!=0 );
  while( idx1<szHdr1 && i<pPKey2->nField ){
    u32 serial_type1;

    /* Read the serial types for the next element in each key. */
    idx1 += getVarint32( aKey1+idx1, serial_type1 );








    if( d1>=nKey1 && sqlite3VdbeSerialTypeLen(serial_type1)>0 ) break;




    /* Extract the values to be compared.
    */
    d1 += sqlite3VdbeSerialGet(&aKey1[d1], serial_type1, &mem1);

    /* Do the comparison
    */
    rc = sqlite3MemCompare(&mem1, &pPKey2->aMem[i],
                           i<nField ? pKeyInfo->aColl[i] : 0);
    if( rc!=0 ){
      assert( mem1.zMalloc==0 );  /* See comment below */

      /* Invert the result if we are using DESC sort order. */
      if( i<nField && pKeyInfo->aSortOrder[i] ){
        rc = -rc;
      }
    
      /* If the PREFIX_SEARCH flag is set and all fields except the final
      ** rowid field were equal, then clear the PREFIX_SEARCH flag and set 
      ** pPKey2->rowid to the value of the rowid field in (pKey1, nKey1).
      ** This is used by the OP_IsUnique opcode.
................................................................................
** Return a pointer to an sqlite3_value structure containing the value bound
** parameter iVar of VM v. Except, if the value is an SQL NULL, return 
** 0 instead. Unless it is NULL, apply affinity aff (one of the SQLITE_AFF_*
** constants) to the value before returning it.
**
** The returned value must be freed by the caller using sqlite3ValueFree().
*/
SQLITE_PRIVATE sqlite3_value *sqlite3VdbeGetValue(Vdbe *v, int iVar, u8 aff){
  assert( iVar>0 );
  if( v ){
    Mem *pMem = &v->aVar[iVar-1];
    if( 0==(pMem->flags & MEM_Null) ){
      sqlite3_value *pRet = sqlite3ValueNew(v->db);
      if( pRet ){
        sqlite3VdbeMemCopy((Mem *)pRet, pMem);
................................................................................
  if( iVar>32 ){
    v->expmask = 0xffffffff;
  }else{
    v->expmask |= ((u32)1 << (iVar-1));
  }
}
















/************** End of vdbeaux.c *********************************************/
/************** Begin file vdbeapi.c *****************************************/
/*
** 2004 May 26
**
** The author disclaims copyright to this source code.  In place of
** a legal notice, here is a blessing:
................................................................................
SQLITE_API void sqlite3_result_double(sqlite3_context *pCtx, double rVal){
  assert( sqlite3_mutex_held(pCtx->s.db->mutex) );
  sqlite3VdbeMemSetDouble(&pCtx->s, rVal);
}
SQLITE_API void sqlite3_result_error(sqlite3_context *pCtx, const char *z, int n){
  assert( sqlite3_mutex_held(pCtx->s.db->mutex) );
  pCtx->isError = SQLITE_ERROR;

  sqlite3VdbeMemSetStr(&pCtx->s, z, n, SQLITE_UTF8, SQLITE_TRANSIENT);
}
#ifndef SQLITE_OMIT_UTF16
SQLITE_API void sqlite3_result_error16(sqlite3_context *pCtx, const void *z, int n){
  assert( sqlite3_mutex_held(pCtx->s.db->mutex) );
  pCtx->isError = SQLITE_ERROR;

  sqlite3VdbeMemSetStr(&pCtx->s, z, n, SQLITE_UTF16NATIVE, SQLITE_TRANSIENT);
}
#endif
SQLITE_API void sqlite3_result_int(sqlite3_context *pCtx, int iVal){
  assert( sqlite3_mutex_held(pCtx->s.db->mutex) );
  sqlite3VdbeMemSetInt64(&pCtx->s, (i64)iVal);
}
................................................................................
}
SQLITE_API void sqlite3_result_zeroblob(sqlite3_context *pCtx, int n){
  assert( sqlite3_mutex_held(pCtx->s.db->mutex) );
  sqlite3VdbeMemSetZeroBlob(&pCtx->s, n);
}
SQLITE_API void sqlite3_result_error_code(sqlite3_context *pCtx, int errCode){
  pCtx->isError = errCode;

  if( pCtx->s.flags & MEM_Null ){
    sqlite3VdbeMemSetStr(&pCtx->s, sqlite3ErrStr(errCode), -1, 
                         SQLITE_UTF8, SQLITE_STATIC);
  }
}

/* Force an SQLITE_TOOBIG error. */
SQLITE_API void sqlite3_result_error_toobig(sqlite3_context *pCtx){
  assert( sqlite3_mutex_held(pCtx->s.db->mutex) );
  pCtx->isError = SQLITE_TOOBIG;

  sqlite3VdbeMemSetStr(&pCtx->s, "string or blob too big", -1, 
                       SQLITE_UTF8, SQLITE_STATIC);
}

/* An SQLITE_NOMEM error. */
SQLITE_API void sqlite3_result_error_nomem(sqlite3_context *pCtx){
  assert( sqlite3_mutex_held(pCtx->s.db->mutex) );
  sqlite3VdbeMemSetNull(&pCtx->s);
  pCtx->isError = SQLITE_NOMEM;

  pCtx->s.db->mallocFailed = 1;
}

/*
** This function is called after a transaction has been committed. It 
** invokes callbacks registered with sqlite3_wal_hook() as required.
*/
................................................................................
    goto end_of_step;
  }
  if( p->pc<0 ){
    /* If there are no other statements currently running, then
    ** reset the interrupt flag.  This prevents a call to sqlite3_interrupt
    ** from interrupting a statement that has not yet started.
    */
    if( db->activeVdbeCnt==0 ){
      db->u1.isInterrupted = 0;
    }

    assert( db->writeVdbeCnt>0 || db->autoCommit==0 || db->nDeferredCons==0 );



#ifndef SQLITE_OMIT_TRACE
    if( db->xProfile && !db->init.busy ){
      sqlite3OsCurrentTimeInt64(db->pVfs, &p->startTime);
    }
#endif

    db->activeVdbeCnt++;
    if( p->readOnly==0 ) db->writeVdbeCnt++;

    p->pc = 0;
  }
#ifndef SQLITE_OMIT_EXPLAIN
  if( p->explain ){
    rc = sqlite3VdbeList(p);
  }else
#endif /* SQLITE_OMIT_EXPLAIN */
  {
    db->vdbeExecCnt++;
    rc = sqlite3VdbeExec(p);
    db->vdbeExecCnt--;
  }

#ifndef SQLITE_OMIT_TRACE
  /* Invoke the profile callback if there is one
  */
  if( rc!=SQLITE_ROW && db->xProfile && !db->init.busy && p->zSql ){
    sqlite3_int64 iNow;
................................................................................
}

/*
** Return the auxilary data pointer, if any, for the iArg'th argument to
** the user-function defined by pCtx.
*/
SQLITE_API void *sqlite3_get_auxdata(sqlite3_context *pCtx, int iArg){
  VdbeFunc *pVdbeFunc;

  assert( sqlite3_mutex_held(pCtx->s.db->mutex) );
  pVdbeFunc = pCtx->pVdbeFunc;
  if( !pVdbeFunc || iArg>=pVdbeFunc->nAux || iArg<0 ){
    return 0;
  }

  return pVdbeFunc->apAux[iArg].pAux;
}

/*
** Set the auxilary data pointer and delete function, for the iArg'th
** argument to the user-function defined by pCtx. Any previous value is
** deleted by calling the delete function specified when it was set.
*/
SQLITE_API void sqlite3_set_auxdata(
  sqlite3_context *pCtx, 
  int iArg, 
  void *pAux, 
  void (*xDelete)(void*)
){
  struct AuxData *pAuxData;
  VdbeFunc *pVdbeFunc;
  if( iArg<0 ) goto failed;

  assert( sqlite3_mutex_held(pCtx->s.db->mutex) );
  pVdbeFunc = pCtx->pVdbeFunc;
  if( !pVdbeFunc || pVdbeFunc->nAux<=iArg ){
    int nAux = (pVdbeFunc ? pVdbeFunc->nAux : 0);
    int nMalloc = sizeof(VdbeFunc) + sizeof(struct AuxData)*iArg;
    pVdbeFunc = sqlite3DbRealloc(pCtx->s.db, pVdbeFunc, nMalloc);
    if( !pVdbeFunc ){
      goto failed;
    }
    pCtx->pVdbeFunc = pVdbeFunc;
    memset(&pVdbeFunc->apAux[nAux], 0, sizeof(struct AuxData)*(iArg+1-nAux));
    pVdbeFunc->nAux = iArg+1;
    pVdbeFunc->pFunc = pCtx->pFunc;


  }











  pAuxData = &pVdbeFunc->apAux[iArg];
  if( pAuxData->pAux && pAuxData->xDelete ){
    pAuxData->xDelete(pAuxData->pAux);
  }

  pAuxData->pAux = pAux;
  pAuxData->xDelete = xDelete;
  return;

failed:
  if( xDelete ){
    xDelete(pAux);
................................................................................
#endif /* SQLITE_OMIT_UTF16 */
SQLITE_API int sqlite3_column_type(sqlite3_stmt *pStmt, int i){
  int iType = sqlite3_value_type( columnMem(pStmt,i) );
  columnMallocFailure(pStmt);
  return iType;
}

/* The following function is experimental and subject to change or
** removal */
/*int sqlite3_column_numeric_type(sqlite3_stmt *pStmt, int i){
**  return sqlite3_value_numeric_type( columnMem(pStmt,i) );
**}
*/

/*
** Convert the N-th element of pStmt->pColName[] into a string using
** xFunc() then return that string.  If N is out of range, return 0.
**
** There are up to 5 names for each column.  useType determines which
** name is returned.  Here are the names:
**
................................................................................
}

/*
** Return the value of a status counter for a prepared statement
*/
SQLITE_API int sqlite3_stmt_status(sqlite3_stmt *pStmt, int op, int resetFlag){
  Vdbe *pVdbe = (Vdbe*)pStmt;
  int v = pVdbe->aCounter[op-1];
  if( resetFlag ) pVdbe->aCounter[op-1] = 0;
  return v;
}

/************** End of vdbeapi.c *********************************************/
/************** Begin file vdbetrace.c ***************************************/
/*
** 2009 November 25
**
................................................................................
    zSql += n;
  }
  return nTotal;
}

/*
** This function returns a pointer to a nul-terminated string in memory
** obtained from sqlite3DbMalloc(). If sqlite3.vdbeExecCnt is 1, then the
** string contains a copy of zRawSql but with host parameters expanded to 
** their current bindings. Or, if sqlite3.vdbeExecCnt is greater than 1, 
** then the returned string holds a copy of zRawSql with "-- " prepended
** to each line of text.
**
** If the SQLITE_TRACE_SIZE_LIMIT macro is defined to an integer, then
** then long strings and blobs are truncated to that many bytes.  This
** can be used to prevent unreasonably large trace strings when dealing
** with large (multi-megabyte) strings and blobs.
................................................................................
  StrAccum out;            /* Accumulate the output here */
  char zBase[100];         /* Initial working space */

  db = p->db;
  sqlite3StrAccumInit(&out, zBase, sizeof(zBase), 
                      db->aLimit[SQLITE_LIMIT_LENGTH]);
  out.db = db;
  if( db->vdbeExecCnt>1 ){
    while( *zRawSql ){
      const char *zStart = zRawSql;
      while( *(zRawSql++)!='\n' && *zRawSql );
      sqlite3StrAccumAppend(&out, "-- ", 3);
      sqlite3StrAccumAppend(&out, zStart, (int)(zRawSql-zStart));
    }
  }else{
................................................................................
  Savepoint *p;
  for(p=db->pSavepoint; p; p=p->pNext) n++;
  assert( n==(db->nSavepoint + db->isTransactionSavepoint) );
  return 1;
}
#endif

/*
** Transfer error message text from an sqlite3_vtab.zErrMsg (text stored
** in memory obtained from sqlite3_malloc) into a Vdbe.zErrMsg (text stored
** in memory obtained from sqlite3DbMalloc).
*/
static void importVtabErrMsg(Vdbe *p, sqlite3_vtab *pVtab){
  sqlite3 *db = p->db;
  sqlite3DbFree(db, p->zErrMsg);
  p->zErrMsg = sqlite3DbStrDup(db, pVtab->zErrMsg);
  sqlite3_free(pVtab->zErrMsg);
  pVtab->zErrMsg = 0;
}


/*
** Execute as much of a VDBE program as we can then return.
**
** sqlite3VdbeMakeReady() must be called before this routine in order to
** close the program with a final OP_Halt and to set up the callbacks
** and the error message pointer.
................................................................................
  int pc=0;                  /* The program counter */
  Op *aOp = p->aOp;          /* Copy of p->aOp */
  Op *pOp;                   /* Current operation */
  int rc = SQLITE_OK;        /* Value to return */
  sqlite3 *db = p->db;       /* The database */
  u8 resetSchemaOnFault = 0; /* Reset schema after an error if positive */
  u8 encoding = ENC(db);     /* The database encoding */


#ifndef SQLITE_OMIT_PROGRESS_CALLBACK
  int checkProgress;         /* True if progress callbacks are enabled */
  int nProgressOps = 0;      /* Opcodes executed since progress callback. */

#endif
  Mem *aMem = p->aMem;       /* Copy of p->aMem */
  Mem *pIn1 = 0;             /* 1st input operand */
  Mem *pIn2 = 0;             /* 2nd input operand */
  Mem *pIn3 = 0;             /* 3rd input operand */
  Mem *pOut = 0;             /* Output operand */
  int iCompare = 0;          /* Result of last OP_Compare operation */
  int *aPermute = 0;         /* Permutation of columns for OP_Compare */
  i64 lastRowid = db->lastRowid;  /* Saved value of the last insert ROWID */
#ifdef VDBE_PROFILE
  u64 start;                 /* CPU clock count at start of opcode */
  int origPc;                /* Program counter at start of opcode */
#endif
  /********************************************************************
................................................................................
  sqlite3VdbeEnter(p);
  if( p->rc==SQLITE_NOMEM ){
    /* This happens if a malloc() inside a call to sqlite3_column_text() or
    ** sqlite3_column_text16() failed.  */
    goto no_mem;
  }
  assert( p->rc==SQLITE_OK || p->rc==SQLITE_BUSY );

  p->rc = SQLITE_OK;
  assert( p->explain==0 );
  p->pResultSet = 0;
  db->busyHandler.nBusy = 0;
  CHECK_FOR_INTERRUPT;
  sqlite3VdbeIOTraceSql(p);
#ifndef SQLITE_OMIT_PROGRESS_CALLBACK
  checkProgress = db->xProgress!=0;








#endif
#ifdef SQLITE_DEBUG
  sqlite3BeginBenignMalloc();
  if( p->pc==0  && (p->db->flags & SQLITE_VdbeListing)!=0 ){
    int i;
    printf("VDBE Program Listing:\n");
    sqlite3VdbePrintSql(p);
................................................................................
  for(pc=p->pc; rc==SQLITE_OK; pc++){
    assert( pc>=0 && pc<p->nOp );
    if( db->mallocFailed ) goto no_mem;
#ifdef VDBE_PROFILE
    origPc = pc;
    start = sqlite3Hwtime();
#endif

    pOp = &aOp[pc];

    /* Only allow tracing if SQLITE_DEBUG is defined.
    */
#ifdef SQLITE_DEBUG
    if( p->trace ){
      if( pc==0 ){
................................................................................
#ifdef SQLITE_TEST
    if( sqlite3_interrupt_count>0 ){
      sqlite3_interrupt_count--;
      if( sqlite3_interrupt_count==0 ){
        sqlite3_interrupt(db);
      }
    }
#endif

#ifndef SQLITE_OMIT_PROGRESS_CALLBACK
    /* Call the progress callback if it is configured and the required number
    ** of VDBE ops have been executed (either since this invocation of
    ** sqlite3VdbeExec() or since last time the progress callback was called).
    ** If the progress callback returns non-zero, exit the virtual machine with
    ** a return code SQLITE_ABORT.
    */
    if( checkProgress ){
      if( db->nProgressOps==nProgressOps ){
        int prc;
        prc = db->xProgress(db->pProgressArg);
        if( prc!=0 ){
          rc = SQLITE_INTERRUPT;
          goto vdbe_error_halt;
        }
        nProgressOps = 0;
      }
      nProgressOps++;
    }
#endif

    /* On any opcode with the "out2-prerelease" tag, free any
    ** external allocations out of mem[p2] and set mem[p2] to be
    ** an undefined integer.  Opcodes will either fill in the integer
    ** value or convert mem[p2] to a different type.
    */
................................................................................
**
** An unconditional jump to address P2.
** The next instruction executed will be 
** the one at index P2 from the beginning of
** the program.
*/
case OP_Goto: {             /* jump */
  CHECK_FOR_INTERRUPT;
  pc = pOp->p2 - 1;

































  break;
}

/* Opcode:  Gosub P1 P2 * * *
**
** Write the current address onto register P1
** and then jump to address P2.
................................................................................
  }
  rc = sqlite3VdbeHalt(p);
  assert( rc==SQLITE_BUSY || rc==SQLITE_OK || rc==SQLITE_ERROR );
  if( rc==SQLITE_BUSY ){
    p->rc = rc = SQLITE_BUSY;
  }else{
    assert( rc==SQLITE_OK || (p->rc&0xff)==SQLITE_CONSTRAINT );
    assert( rc==SQLITE_OK || db->nDeferredCons>0 );
    rc = p->rc ? SQLITE_ERROR : SQLITE_DONE;
  }
  goto vdbe_return;
}

/* Opcode: Integer P1 P2 * * *
**
................................................................................
    assert( memIsValid(u.ai.pArg) );
    u.ai.apVal[u.ai.i] = u.ai.pArg;
    Deephemeralize(u.ai.pArg);
    sqlite3VdbeMemStoreType(u.ai.pArg);
    REGISTER_TRACE(pOp->p2+u.ai.i, u.ai.pArg);
  }

  assert( pOp->p4type==P4_FUNCDEF || pOp->p4type==P4_VDBEFUNC );
  if( pOp->p4type==P4_FUNCDEF ){
    u.ai.ctx.pFunc = pOp->p4.pFunc;
    u.ai.ctx.pVdbeFunc = 0;
  }else{
    u.ai.ctx.pVdbeFunc = (VdbeFunc*)pOp->p4.pVdbeFunc;
    u.ai.ctx.pFunc = u.ai.ctx.pVdbeFunc->pFunc;
  }

  u.ai.ctx.s.flags = MEM_Null;
  u.ai.ctx.s.db = db;
  u.ai.ctx.s.xDel = 0;
  u.ai.ctx.s.zMalloc = 0;



  /* The output cell may already have a buffer allocated. Move
  ** the pointer to u.ai.ctx.s so in case the user-function can use
  ** the already allocated buffer instead of allocating a new one.
  */
  sqlite3VdbeMemMove(&u.ai.ctx.s, pOut);
  MemSetTypeFlag(&u.ai.ctx.s, MEM_Null);

  u.ai.ctx.isError = 0;
  if( u.ai.ctx.pFunc->flags & SQLITE_FUNC_NEEDCOLL ){
    assert( pOp>aOp );
    assert( pOp[-1].p4type==P4_COLLSEQ );
    assert( pOp[-1].opcode==OP_CollSeq );
    u.ai.ctx.pColl = pOp[-1].p4.pColl;
  }
  db->lastRowid = lastRowid;
  (*u.ai.ctx.pFunc->xFunc)(&u.ai.ctx, u.ai.n, u.ai.apVal); /* IMP: R-24505-23230 */
  lastRowid = db->lastRowid;

  /* If any auxiliary data functions have been called by this user function,
  ** immediately call the destructor for any non-static values.
  */
  if( u.ai.ctx.pVdbeFunc ){
    sqlite3VdbeDeleteAuxData(u.ai.ctx.pVdbeFunc, pOp->p1);
    pOp->p4.pVdbeFunc = u.ai.ctx.pVdbeFunc;
    pOp->p4type = P4_VDBEFUNC;
  }

  if( db->mallocFailed ){
    /* Even though a malloc() has failed, the implementation of the
    ** user function may have called an sqlite3_result_XXX() function
    ** to return a value. The following call releases any resources
    ** associated with such a value.
    */
    sqlite3VdbeMemRelease(&u.ai.ctx.s);
    goto no_mem;
  }

  /* If the function returned an error, throw an exception */

  if( u.ai.ctx.isError ){
    sqlite3SetString(&p->zErrMsg, db, "%s", sqlite3_value_text(&u.ai.ctx.s));
    rc = u.ai.ctx.isError;


  }

  /* Copy the result of the function into register P3 */
  sqlite3VdbeChangeEncoding(&u.ai.ctx.s, encoding);
  sqlite3VdbeMemMove(pOut, &u.ai.ctx.s);
  if( sqlite3VdbeMemTooBig(pOut) ){
    goto too_big;
................................................................................
        u.ak.res = 1;  /* Results are not equal */
      }
    }else{
      /* SQLITE_NULLEQ is clear and at least one operand is NULL,
      ** then the result is always NULL.
      ** The jump is taken if the SQLITE_JUMPIFNULL bit is set.
      */


      if( pOp->p5 & SQLITE_STOREP2 ){
        pOut = &aMem[pOp->p2];
        MemSetTypeFlag(pOut, MEM_Null);
        REGISTER_TRACE(pOp->p2, pOut);
      }else if( pOp->p5 & SQLITE_JUMPIFNULL ){
        pc = pOp->p2-1;
      }
      break;
    }
  }else{
    /* Neither operand is NULL.  Do a comparison. */
    u.ak.affinity = pOp->p5 & SQLITE_AFF_MASK;
    if( u.ak.affinity ){
................................................................................
  /* Assert that the u.as.p1 parameter is valid. Also that if there is no open
  ** transaction, then there cannot be any savepoints.
  */
  assert( db->pSavepoint==0 || db->autoCommit==0 );
  assert( u.as.p1==SAVEPOINT_BEGIN||u.as.p1==SAVEPOINT_RELEASE||u.as.p1==SAVEPOINT_ROLLBACK );
  assert( db->pSavepoint || db->isTransactionSavepoint==0 );
  assert( checkSavepointCount(db) );


  if( u.as.p1==SAVEPOINT_BEGIN ){
    if( db->writeVdbeCnt>0 ){

      /* A new savepoint cannot be created if there are active write
      ** statements (i.e. open read/write incremental blob handles).
      */
      sqlite3SetString(&p->zErrMsg, db, "cannot open savepoint - "
        "SQL statements in progress");
      rc = SQLITE_BUSY;
    }else{
................................................................................
          db->nSavepoint++;
        }

        /* Link the new savepoint into the database handle's list. */
        u.as.pNew->pNext = db->pSavepoint;
        db->pSavepoint = u.as.pNew;
        u.as.pNew->nDeferredCons = db->nDeferredCons;

      }
    }
  }else{
    u.as.iSavepoint = 0;

    /* Find the named savepoint. If there is no such savepoint, then an
    ** an error is returned to the user.  */
................................................................................
      u.as.pSavepoint = u.as.pSavepoint->pNext
    ){
      u.as.iSavepoint++;
    }
    if( !u.as.pSavepoint ){
      sqlite3SetString(&p->zErrMsg, db, "no such savepoint: %s", u.as.zName);
      rc = SQLITE_ERROR;
    }else if( db->writeVdbeCnt>0 && u.as.p1==SAVEPOINT_RELEASE ){
      /* It is not possible to release (commit) a savepoint if there are
      ** active write statements.
      */
      sqlite3SetString(&p->zErrMsg, db,
        "cannot release savepoint - SQL statements in progress"
      );
      rc = SQLITE_BUSY;
................................................................................
        db->pSavepoint = u.as.pSavepoint->pNext;
        sqlite3DbFree(db, u.as.pSavepoint);
        if( !isTransaction ){
          db->nSavepoint--;
        }
      }else{
        db->nDeferredCons = u.as.pSavepoint->nDeferredCons;

      }

      if( !isTransaction ){
        rc = sqlite3VtabSavepoint(db, u.as.p1, u.as.iSavepoint);
        if( rc!=SQLITE_OK ) goto abort_due_to_error;
      }
    }
................................................................................
#endif /* local variables moved into u.at */

  u.at.desiredAutoCommit = pOp->p1;
  u.at.iRollback = pOp->p2;
  u.at.turnOnAC = u.at.desiredAutoCommit && !db->autoCommit;
  assert( u.at.desiredAutoCommit==1 || u.at.desiredAutoCommit==0 );
  assert( u.at.desiredAutoCommit==1 || u.at.iRollback==0 );
  assert( db->activeVdbeCnt>0 );  /* At least this one VM is active */


#if 0
  if( u.at.turnOnAC && u.at.iRollback && db->activeVdbeCnt>1 ){
    /* If this instruction implements a ROLLBACK and other VMs are
    ** still running, and a transaction is active, return an error indicating
    ** that the other VMs must complete first.
    */
    sqlite3SetString(&p->zErrMsg, db, "cannot rollback transaction - "
        "SQL statements in progress");
    rc = SQLITE_BUSY;
  }else
#endif
  if( u.at.turnOnAC && !u.at.iRollback && db->writeVdbeCnt>0 ){
    /* If this instruction implements a COMMIT and other VMs are writing
    ** return an error indicating that the other VMs must complete first.
    */
    sqlite3SetString(&p->zErrMsg, db, "cannot commit transaction - "
        "SQL statements in progress");
    rc = SQLITE_BUSY;
  }else if( u.at.desiredAutoCommit!=db->autoCommit ){
................................................................................
** attached databases.
**
** If P2 is non-zero, then a write-transaction is started.  A RESERVED lock is
** obtained on the database file when a write-transaction is started.  No
** other process can start another write transaction while this transaction is
** underway.  Starting a write transaction also creates a rollback journal. A
** write transaction must be started before any changes can be made to the
** database.  If P2 is 2 or greater then an EXCLUSIVE lock is also obtained
** on the file.
**
** If a write-transaction is started and the Vdbe.usesStmtJournal flag is
** true (this flag is set if the Vdbe may modify more than one row and may
** throw an ABORT exception), a statement transaction may also be opened.
** More specifically, a statement transaction is opened iff the database
** connection is currently not in autocommit mode, or if there are other
** active statements. A statement transaction allows the changes made by this
................................................................................
** If P2 is zero, then a read-lock is obtained on the database file.
*/
case OP_Transaction: {
#if 0  /* local variables moved into u.au */
  Btree *pBt;
#endif /* local variables moved into u.au */



  assert( pOp->p1>=0 && pOp->p1<db->nDb );
  assert( (p->btreeMask & (((yDbMask)1)<<pOp->p1))!=0 );




  u.au.pBt = db->aDb[pOp->p1].pBt;

  if( u.au.pBt ){
    rc = sqlite3BtreeBeginTrans(u.au.pBt, pOp->p2);
    if( rc==SQLITE_BUSY ){
      p->pc = pc;
      p->rc = rc = SQLITE_BUSY;
................................................................................
      goto vdbe_return;
    }
    if( rc!=SQLITE_OK ){
      goto abort_due_to_error;
    }

    if( pOp->p2 && p->usesStmtJournal
     && (db->autoCommit==0 || db->activeVdbeCnt>1)
    ){
      assert( sqlite3BtreeIsInTrans(u.au.pBt) );
      if( p->iStatement==0 ){
        assert( db->nStatement>=0 && db->nSavepoint>=0 );
        db->nStatement++;
        p->iStatement = db->nSavepoint + db->nStatement;
      }
................................................................................
        rc = sqlite3BtreeBeginStmt(u.au.pBt, p->iStatement);
      }

      /* Store the current value of the database handles deferred constraint
      ** counter. If the statement transaction needs to be rolled back,
      ** the value of this counter needs to be restored too.  */
      p->nStmtDefCons = db->nDeferredCons;

    }
  }
  break;
}

/* Opcode: ReadCookie P1 P2 P3 * *
**
................................................................................
case OP_ReadCookie: {               /* out2-prerelease */
#if 0  /* local variables moved into u.av */
  int iMeta;
  int iDb;
  int iCookie;
#endif /* local variables moved into u.av */


  u.av.iDb = pOp->p1;
  u.av.iCookie = pOp->p3;
  assert( pOp->p3<SQLITE_N_BTREE_META );
  assert( u.av.iDb>=0 && u.av.iDb<db->nDb );
  assert( db->aDb[u.av.iDb].pBt!=0 );
  assert( (p->btreeMask & (((yDbMask)1)<<u.av.iDb))!=0 );

................................................................................
case OP_SetCookie: {       /* in3 */
#if 0  /* local variables moved into u.aw */
  Db *pDb;
#endif /* local variables moved into u.aw */
  assert( pOp->p2<SQLITE_N_BTREE_META );
  assert( pOp->p1>=0 && pOp->p1<db->nDb );
  assert( (p->btreeMask & (((yDbMask)1)<<pOp->p1))!=0 );

  u.aw.pDb = &db->aDb[pOp->p1];
  assert( u.aw.pDb->pBt!=0 );
  assert( sqlite3SchemaMutexHeld(db, pOp->p1, 0) );
  pIn3 = &aMem[pOp->p3];
  sqlite3VdbeMemIntegerify(pIn3);
  /* See note about index shifting on OP_ReadCookie */
  rc = sqlite3BtreeUpdateMeta(u.aw.pDb->pBt, pOp->p2, (int)pIn3->u.i);
................................................................................
  int iGen;
  Btree *pBt;
#endif /* local variables moved into u.ax */

  assert( pOp->p1>=0 && pOp->p1<db->nDb );
  assert( (p->btreeMask & (((yDbMask)1)<<pOp->p1))!=0 );
  assert( sqlite3SchemaMutexHeld(db, pOp->p1, 0) );

  u.ax.pBt = db->aDb[pOp->p1].pBt;
  if( u.ax.pBt ){
    sqlite3BtreeGetMeta(u.ax.pBt, BTREE_SCHEMA_VERSION, (u32 *)&u.ax.iMeta);
    u.ax.iGen = db->aDb[pOp->p1].pSchema->iGeneration;
  }else{
    u.ax.iGen = u.ax.iMeta = 0;
  }
................................................................................
  Btree *pX;
  VdbeCursor *pCur;
  Db *pDb;
#endif /* local variables moved into u.ay */

  assert( (pOp->p5&(OPFLAG_P2ISREG|OPFLAG_BULKCSR))==pOp->p5 );
  assert( pOp->opcode==OP_OpenWrite || pOp->p5==0 );



  if( p->expired ){
    rc = SQLITE_ABORT;
    break;
  }

  u.ay.nField = 0;
................................................................................
    u.bn.v = u.bn.pC->movetoTarget;
#ifndef SQLITE_OMIT_VIRTUALTABLE
  }else if( u.bn.pC->pVtabCursor ){
    u.bn.pVtab = u.bn.pC->pVtabCursor->pVtab;
    u.bn.pModule = u.bn.pVtab->pModule;
    assert( u.bn.pModule->xRowid );
    rc = u.bn.pModule->xRowid(u.bn.pC->pVtabCursor, &u.bn.v);
    importVtabErrMsg(p, u.bn.pVtab);
#endif /* SQLITE_OMIT_VIRTUALTABLE */
  }else{
    assert( u.bn.pC->pCursor!=0 );
    rc = sqlite3VdbeCursorMoveto(u.bn.pC);
    if( rc ) goto abort_due_to_error;
    if( u.bn.pC->rowidIsValid ){
      u.bn.v = u.bn.pC->lastRowid;
................................................................................
*/
case OP_SorterSort:    /* jump */
case OP_Sort: {        /* jump */
#ifdef SQLITE_TEST
  sqlite3_sort_count++;
  sqlite3_search_count--;
#endif
  p->aCounter[SQLITE_STMTSTATUS_SORT-1]++;
  /* Fall through into OP_Rewind */
}
/* Opcode: Rewind P1 P2 * * *
**
** The next use of the Rowid or Column or Next instruction for P1 
** will refer to the first entry in the database table or index.
** If the table or index is empty and P2>0, then jump immediately to P2.
................................................................................
case OP_Prev:          /* jump */
case OP_Next: {        /* jump */
#if 0  /* local variables moved into u.br */
  VdbeCursor *pC;
  int res;
#endif /* local variables moved into u.br */

  CHECK_FOR_INTERRUPT;
  assert( pOp->p1>=0 && pOp->p1<p->nCursor );
  assert( pOp->p5<=ArraySize(p->aCounter) );
  u.br.pC = p->apCsr[pOp->p1];
  if( u.br.pC==0 ){
    break;  /* See ticket #2273 */
  }
  assert( u.br.pC->isSorter==(pOp->opcode==OP_SorterNext) );
  if( isSorter(u.br.pC) ){
    assert( pOp->opcode==OP_SorterNext );
    rc = sqlite3VdbeSorterNext(db, u.br.pC, &u.br.res);
  }else{
    u.br.res = 1;
    assert( u.br.pC->deferredMoveto==0 );
    assert( u.br.pC->pCursor );
    assert( pOp->opcode!=OP_Next || pOp->p4.xAdvance==sqlite3BtreeNext );
    assert( pOp->opcode!=OP_Prev || pOp->p4.xAdvance==sqlite3BtreePrevious );
    rc = pOp->p4.xAdvance(u.br.pC->pCursor, &u.br.res);
  }
  u.br.pC->nullRow = (u8)u.br.res;
  u.br.pC->cacheStatus = CACHE_STALE;
  if( u.br.res==0 ){
    pc = pOp->p2 - 1;
    if( pOp->p5 ) p->aCounter[pOp->p5-1]++;
#ifdef SQLITE_TEST
    sqlite3_search_count++;
#endif
  }
  u.br.pC->rowidIsValid = 0;
  break;
}

/* Opcode: IdxInsert P1 P2 P3 * P5
**
** Register P2 holds an SQL index key made using the
** MakeRecord instructions.  This opcode writes that key
** into the index P1.  Data for the entry is nil.
................................................................................
#if 0  /* local variables moved into u.bw */
  int iMoved;
  int iCnt;
  Vdbe *pVdbe;
  int iDb;
#endif /* local variables moved into u.bw */


#ifndef SQLITE_OMIT_VIRTUALTABLE
  u.bw.iCnt = 0;
  for(u.bw.pVdbe=db->pVdbe; u.bw.pVdbe; u.bw.pVdbe = u.bw.pVdbe->pNext){

    if( u.bw.pVdbe->magic==VDBE_MAGIC_RUN && u.bw.pVdbe->inVtabMethod<2 && u.bw.pVdbe->pc>=0 ){

      u.bw.iCnt++;
    }
  }
#else
  u.bw.iCnt = db->activeVdbeCnt;
#endif
  pOut->flags = MEM_Null;
  if( u.bw.iCnt>1 ){
    rc = SQLITE_LOCKED;
    p->errorAction = OE_Abort;
  }else{
    u.bw.iDb = pOp->p3;
................................................................................
*/
case OP_Clear: {
#if 0  /* local variables moved into u.bx */
  int nChange;
#endif /* local variables moved into u.bx */

  u.bx.nChange = 0;

  assert( (p->btreeMask & (((yDbMask)1)<<pOp->p2))!=0 );
  rc = sqlite3BtreeClearTable(
      db->aDb[pOp->p2].pBt, pOp->p1, (pOp->p3 ? &u.bx.nChange : 0)
  );
  if( pOp->p3 ){
    p->nChange += u.bx.nChange;
    if( pOp->p3>0 ){
................................................................................
  int flags;
  Db *pDb;
#endif /* local variables moved into u.by */

  u.by.pgno = 0;
  assert( pOp->p1>=0 && pOp->p1<db->nDb );
  assert( (p->btreeMask & (((yDbMask)1)<<pOp->p1))!=0 );

  u.by.pDb = &db->aDb[pOp->p1];
  assert( u.by.pDb->pBt!=0 );
  if( pOp->opcode==OP_CreateTable ){
    /* u.by.flags = BTREE_INTKEY; */
    u.by.flags = BTREE_INTKEY;
  }else{
    u.by.flags = BTREE_BLOBKEY;
................................................................................
  int *aRoot;     /* Array of rootpage numbers for tables to be checked */
  int j;          /* Loop counter */
  int nErr;       /* Number of errors reported */
  char *z;        /* Text of the error report */
  Mem *pnErr;     /* Register keeping track of errors remaining */
#endif /* local variables moved into u.ca */


  u.ca.nRoot = pOp->p2;
  assert( u.ca.nRoot>0 );
  u.ca.aRoot = sqlite3DbMallocRaw(db, sizeof(int)*(u.ca.nRoot+1) );
  if( u.ca.aRoot==0 ) goto no_mem;
  assert( pOp->p3>0 && pOp->p3<=p->nMem );
  u.ca.pnErr = &aMem[pOp->p3];
  assert( (u.ca.pnErr->flags & MEM_Int)!=0 );
................................................................................
** register P3.  Or, if boolean index P1 is initially empty, leave P3
** unchanged and jump to instruction P2.
*/
case OP_RowSetRead: {       /* jump, in1, out3 */
#if 0  /* local variables moved into u.cb */
  i64 val;
#endif /* local variables moved into u.cb */
  CHECK_FOR_INTERRUPT;
  pIn1 = &aMem[pOp->p1];
  if( (pIn1->flags & MEM_RowSet)==0
   || sqlite3RowSetNext(pIn1->u.pRowSet, &u.cb.val)==0
  ){
    /* The boolean index is empty */
    sqlite3VdbeMemSetNull(pIn1);
    pc = pOp->p2 - 1;
  }else{
    /* A value was pulled from the index */
    sqlite3VdbeMemSetInt64(&aMem[pOp->p3], u.cb.val);
  }
  break;
}

/* Opcode: RowSetTest P1 P2 P3 P4
**
** Register P3 is assumed to hold a 64-bit integer value. If register P1
** contains a RowSet object and that RowSet object contains
** the value held in P3, jump to register P2. Otherwise, insert the
................................................................................
**
** Increment a "constraint counter" by P2 (P2 may be negative or positive).
** If P1 is non-zero, the database constraint counter is incremented 
** (deferred foreign key constraints). Otherwise, if P1 is zero, the 
** statement counter is incremented (immediate foreign key constraints).
*/
case OP_FkCounter: {


  if( pOp->p1 ){
    db->nDeferredCons += pOp->p2;
  }else{
    p->nFkConstraint += pOp->p2;
  }
  break;
}

................................................................................
** If P1 is non-zero, then the jump is taken if the database constraint-counter
** is zero (the one that counts deferred constraint violations). If P1 is
** zero, the jump is taken if the statement constraint-counter is zero
** (immediate foreign key constraint violations).
*/
case OP_FkIfZero: {         /* jump */
  if( pOp->p1 ){
    if( db->nDeferredCons==0 ) pc = pOp->p2-1;
  }else{
    if( p->nFkConstraint==0 ) pc = pOp->p2-1;
  }
  break;
}
#endif /* #ifndef SQLITE_OMIT_FOREIGN_KEY */

#ifndef SQLITE_OMIT_AUTOINCREMENT
/* Opcode: MemMax P1 P2 * * *
................................................................................
case OP_Checkpoint: {
#if 0  /* local variables moved into u.ci */
  int i;                          /* Loop counter */
  int aRes[3];                    /* Results */
  Mem *pMem;                      /* Write results here */
#endif /* local variables moved into u.ci */


  u.ci.aRes[0] = 0;
  u.ci.aRes[1] = u.ci.aRes[2] = -1;
  assert( pOp->p2==SQLITE_CHECKPOINT_PASSIVE
       || pOp->p2==SQLITE_CHECKPOINT_FULL
       || pOp->p2==SQLITE_CHECKPOINT_RESTART
  );
  rc = sqlite3Checkpoint(db, pOp->p1, pOp->p2, &u.ci.aRes[1], &u.ci.aRes[2]);
................................................................................
       || u.cj.eNew==PAGER_JOURNALMODE_PERSIST
       || u.cj.eNew==PAGER_JOURNALMODE_OFF
       || u.cj.eNew==PAGER_JOURNALMODE_MEMORY
       || u.cj.eNew==PAGER_JOURNALMODE_WAL
       || u.cj.eNew==PAGER_JOURNALMODE_QUERY
  );
  assert( pOp->p1>=0 && pOp->p1<db->nDb );


  u.cj.pBt = db->aDb[pOp->p1].pBt;
  u.cj.pPager = sqlite3BtreePager(u.cj.pBt);
  u.cj.eOld = sqlite3PagerGetJournalMode(u.cj.pPager);
  if( u.cj.eNew==PAGER_JOURNALMODE_QUERY ) u.cj.eNew = u.cj.eOld;
  if( !sqlite3PagerOkToChangeJournalMode(u.cj.pPager) ) u.cj.eNew = u.cj.eOld;

................................................................................
  ){
    u.cj.eNew = u.cj.eOld;
  }

  if( (u.cj.eNew!=u.cj.eOld)
   && (u.cj.eOld==PAGER_JOURNALMODE_WAL || u.cj.eNew==PAGER_JOURNALMODE_WAL)
  ){
    if( !db->autoCommit || db->activeVdbeCnt>1 ){
      rc = SQLITE_ERROR;
      sqlite3SetString(&p->zErrMsg, db,
          "cannot change %s wal mode from within a transaction",
          (u.cj.eNew==PAGER_JOURNALMODE_WAL ? "into" : "out of")
      );
      break;
    }else{
................................................................................
/* Opcode: Vacuum * * * * *
**
** Vacuum the entire database.  This opcode will cause other virtual
** machines to be created and run.  It may not be called from within
** a transaction.
*/
case OP_Vacuum: {

  rc = sqlite3RunVacuum(&p->zErrMsg, db);
  break;
}
#endif

#if !defined(SQLITE_OMIT_AUTOVACUUM)
/* Opcode: IncrVacuum P1 P2 * * *
................................................................................
case OP_IncrVacuum: {        /* jump */
#if 0  /* local variables moved into u.ck */
  Btree *pBt;
#endif /* local variables moved into u.ck */

  assert( pOp->p1>=0 && pOp->p1<db->nDb );
  assert( (p->btreeMask & (((yDbMask)1)<<pOp->p1))!=0 );

  u.ck.pBt = db->aDb[pOp->p1].pBt;
  rc = sqlite3BtreeIncrVacuum(u.ck.pBt);
  if( rc==SQLITE_DONE ){
    pc = pOp->p2 - 1;
    rc = SQLITE_OK;
  }
  break;
................................................................................
*/
case OP_VBegin: {
#if 0  /* local variables moved into u.cl */
  VTable *pVTab;
#endif /* local variables moved into u.cl */
  u.cl.pVTab = pOp->p4.pVtab;
  rc = sqlite3VtabBegin(db, u.cl.pVTab);
  if( u.cl.pVTab ) importVtabErrMsg(p, u.cl.pVTab->pVtab);
  break;
}
#endif /* SQLITE_OMIT_VIRTUALTABLE */

#ifndef SQLITE_OMIT_VIRTUALTABLE
/* Opcode: VCreate P1 * * P4 *
**
................................................................................
#if 0  /* local variables moved into u.cm */
  VdbeCursor *pCur;
  sqlite3_vtab_cursor *pVtabCursor;
  sqlite3_vtab *pVtab;
  sqlite3_module *pModule;
#endif /* local variables moved into u.cm */


  u.cm.pCur = 0;
  u.cm.pVtabCursor = 0;
  u.cm.pVtab = pOp->p4.pVtab->pVtab;
  u.cm.pModule = (sqlite3_module *)u.cm.pVtab->pModule;
  assert(u.cm.pVtab && u.cm.pModule);
  rc = u.cm.pModule->xOpen(u.cm.pVtab, &u.cm.pVtabCursor);
  importVtabErrMsg(p, u.cm.pVtab);
  if( SQLITE_OK==rc ){
    /* Initialize sqlite3_vtab_cursor base class */
    u.cm.pVtabCursor->pVtab = u.cm.pVtab;

    /* Initialize vdbe cursor object */
    u.cm.pCur = allocateCursor(p, pOp->p1, 0, -1, 0);
    if( u.cm.pCur ){
................................................................................
      u.cn.apArg[u.cn.i] = &u.cn.pArgc[u.cn.i+1];
      sqlite3VdbeMemStoreType(u.cn.apArg[u.cn.i]);
    }

    p->inVtabMethod = 1;
    rc = u.cn.pModule->xFilter(u.cn.pVtabCursor, u.cn.iQuery, pOp->p4.z, u.cn.nArg, u.cn.apArg);
    p->inVtabMethod = 0;
    importVtabErrMsg(p, u.cn.pVtab);
    if( rc==SQLITE_OK ){
      u.cn.res = u.cn.pModule->xEof(u.cn.pVtabCursor);
    }

    if( u.cn.res ){
      pc = pOp->p2 - 1;
    }
................................................................................
  ** can use the already allocated buffer instead of allocating a
  ** new one.
  */
  sqlite3VdbeMemMove(&u.co.sContext.s, u.co.pDest);
  MemSetTypeFlag(&u.co.sContext.s, MEM_Null);

  rc = u.co.pModule->xColumn(pCur->pVtabCursor, &u.co.sContext, pOp->p2);
  importVtabErrMsg(p, u.co.pVtab);
  if( u.co.sContext.isError ){
    rc = u.co.sContext.isError;
  }

  /* Copy the result of the function to the P3 register. We
  ** do this regardless of whether or not an error occurred to ensure any
  ** dynamic allocation in u.co.sContext.s (a Mem struct) is  released.
................................................................................
  ** xNext(). Instead, if an error occurs, true is returned (indicating that
  ** data is available) and the error code returned when xColumn or
  ** some other method is next invoked on the save virtual table cursor.
  */
  p->inVtabMethod = 1;
  rc = u.cp.pModule->xNext(u.cp.pCur->pVtabCursor);
  p->inVtabMethod = 0;
  importVtabErrMsg(p, u.cp.pVtab);
  if( rc==SQLITE_OK ){
    u.cp.res = u.cp.pModule->xEof(u.cp.pCur->pVtabCursor);
  }

  if( !u.cp.res ){
    /* If there is data, jump to P2 */
    pc = pOp->p2 - 1;
  }
  break;
}
#endif /* SQLITE_OMIT_VIRTUALTABLE */

#ifndef SQLITE_OMIT_VIRTUALTABLE
/* Opcode: VRename P1 * * P4 *
**
** P4 is a pointer to a virtual table object, an sqlite3_vtab structure.
................................................................................
  Mem *pName;
#endif /* local variables moved into u.cq */

  u.cq.pVtab = pOp->p4.pVtab->pVtab;
  u.cq.pName = &aMem[pOp->p1];
  assert( u.cq.pVtab->pModule->xRename );
  assert( memIsValid(u.cq.pName) );

  REGISTER_TRACE(pOp->p1, u.cq.pName);
  assert( u.cq.pName->flags & MEM_Str );
  testcase( u.cq.pName->enc==SQLITE_UTF8 );
  testcase( u.cq.pName->enc==SQLITE_UTF16BE );
  testcase( u.cq.pName->enc==SQLITE_UTF16LE );
  rc = sqlite3VdbeChangeEncoding(u.cq.pName, SQLITE_UTF8);
  if( rc==SQLITE_OK ){
    rc = u.cq.pVtab->pModule->xRename(u.cq.pVtab, u.cq.pName->z);
    importVtabErrMsg(p, u.cq.pVtab);
    p->expired = 0;
  }
  break;
}
#endif

#ifndef SQLITE_OMIT_VIRTUALTABLE
................................................................................
  Mem **apArg;
  Mem *pX;
#endif /* local variables moved into u.cr */

  assert( pOp->p2==1        || pOp->p5==OE_Fail   || pOp->p5==OE_Rollback
       || pOp->p5==OE_Abort || pOp->p5==OE_Ignore || pOp->p5==OE_Replace
  );

  u.cr.pVtab = pOp->p4.pVtab->pVtab;
  u.cr.pModule = (sqlite3_module *)u.cr.pVtab->pModule;
  u.cr.nArg = pOp->p2;
  assert( pOp->p4type==P4_VTAB );
  if( ALWAYS(u.cr.pModule->xUpdate) ){
    u8 vtabOnConflict = db->vtabOnConflict;
    u.cr.apArg = p->apArg;
................................................................................
      sqlite3VdbeMemStoreType(u.cr.pX);
      u.cr.apArg[u.cr.i] = u.cr.pX;
      u.cr.pX++;
    }
    db->vtabOnConflict = pOp->p5;
    rc = u.cr.pModule->xUpdate(u.cr.pVtab, u.cr.nArg, u.cr.apArg, &u.cr.rowid);
    db->vtabOnConflict = vtabOnConflict;
    importVtabErrMsg(p, u.cr.pVtab);
    if( rc==SQLITE_OK && pOp->p1 ){
      assert( u.cr.nArg>1 && u.cr.apArg[0] && (u.cr.apArg[0]->flags&MEM_Null) );
      db->lastRowid = lastRowid = u.cr.rowid;
    }
    if( (rc&0xff)==SQLITE_CONSTRAINT && pOp->p4.pVtab->bConstraint ){
      if( pOp->p5==OE_Ignore ){
        rc = SQLITE_OK;
................................................................................
  }

  /* This is the only way out of this procedure.  We have to
  ** release the mutexes on btrees that were acquired at the
  ** top. */
vdbe_return:
  db->lastRowid = lastRowid;


  sqlite3VdbeLeave(p);
  return rc;

  /* Jump to here if a string or blob larger than SQLITE_MAX_LENGTH
  ** is encountered.
  */
too_big:
................................................................................
** comparing aIter[2*i-N] and aIter[2*i-N+1]. Whichever key is smaller, the
** aTree element is set to the index of it. 
**
** For the purposes of this comparison, EOF is considered greater than any
** other key value. If the keys are equal (only possible with two EOF
** values), it doesn't matter which index is stored.
**
** The (N/4) elements of aTree[] that preceed the final (N/2) described 
** above contains the index of the smallest of each block of 4 iterators.
** And so on. So that aTree[1] contains the index of the iterator that 
** currently points to the smallest key value. aTree[0] is unused.
**
** Example:
**
**     aIter[0] -> Banana
................................................................................
** The size chosen is a little less than a power of two.  That way,
** the FileChunk object will have a size that almost exactly fills
** a power-of-two allocation.  This mimimizes wasted space in power-of-two
** memory allocators.
*/
#define JOURNAL_CHUNKSIZE ((int)(1024-sizeof(FileChunk*)))

/* Macro to find the minimum of two numeric values.
*/
#ifndef MIN
# define MIN(x,y) ((x)<(y)?(x):(y))
#endif

/*
** The rollback journal is composed of a linked list of these structures.
*/
struct FileChunk {
  FileChunk *pNext;               /* Next chunk in the journal */
  u8 zChunk[JOURNAL_CHUNKSIZE];   /* Content of this chunk */
};
................................................................................
** TK_AS operator.  The TK_AS operator causes the expression to be
** evaluated just once and then reused for each alias.
**
** The reason for suppressing the TK_AS term when the expression is a simple
** column reference is so that the column reference will be recognized as
** usable by indices within the WHERE clause processing logic. 
**
** Hack:  The TK_AS operator is inhibited if zType[0]=='G'.  This means
** that in a GROUP BY clause, the expression is evaluated twice.  Hence:
**
**     SELECT random()%5 AS x, count(*) FROM tab GROUP BY x
**
** Is equivalent to:
**
**     SELECT random()%5 AS x, count(*) FROM tab GROUP BY random()%5
**
** The result of random()%5 in the GROUP BY clause is probably different
** from the result in the result-set.  We might fix this someday.  Or
** then again, we might not...

**
** If the reference is followed by a COLLATE operator, then make sure
** the COLLATE operator is preserved.  For example:
**
**     SELECT a+b, c+d FROM t1 ORDER BY 1 COLLATE nocase;
**
** Should be transformed into:
................................................................................
  ExprSetIrreducible(pExpr);

  /* Translate the schema name in zDb into a pointer to the corresponding
  ** schema.  If not found, pSchema will remain NULL and nothing will match
  ** resulting in an appropriate error message toward the end of this routine
  */
  if( zDb ){








    for(i=0; i<db->nDb; i++){
      assert( db->aDb[i].zName );
      if( sqlite3StrICmp(db->aDb[i].zName,zDb)==0 ){
        pSchema = db->aDb[i].pSchema;
        break;

      }
    }
  }

  /* Start at the inner-most context and move outward until a match is found */
  while( pNC && cnt==0 ){
    ExprList *pEList;
................................................................................
    **
    **     SELECT a+b AS x FROM table WHERE x<10;
    **
    ** In cases like this, replace pExpr with a copy of the expression that
    ** forms the result set entry ("a+b" in the example) and return immediately.
    ** Note that the expression in the result set should have already been
    ** resolved by the time the WHERE clause is resolved.






    */
    if( (pEList = pNC->pEList)!=0
     && zTab==0
     && ((pNC->ncFlags & NC_AsMaybe)==0 || cnt==0)
    ){
      for(j=0; j<pEList->nExpr; j++){
        char *zAs = pEList->a[j].zName;
        if( zAs!=0 && sqlite3StrICmp(zAs, zCol)==0 ){
          Expr *pOrig;
          assert( pExpr->pLeft==0 && pExpr->pRight==0 );
          assert( pExpr->x.pList==0 );
................................................................................
      testcase( iCol==BMS-1 );
      pItem->colUsed |= ((Bitmask)1)<<(iCol>=BMS ? BMS-1 : iCol);
    }
    ExprSetProperty(p, EP_Resolved);
  }
  return p;
}


































/*
** This routine is callback for sqlite3WalkExpr().
**
** Resolve symbolic names into TK_COLUMN operators for the current
** node in the expression tree.  Return 0 to continue the search down
** the tree or 2 to abort the tree walk.
................................................................................
      int nId;                    /* Number of characters in function name */
      const char *zId;            /* The function name. */
      FuncDef *pDef;              /* Information about the function */
      u8 enc = ENC(pParse->db);   /* The database encoding */

      testcase( pExpr->op==TK_CONST_FUNC );
      assert( !ExprHasProperty(pExpr, EP_xIsSelect) );

      zId = pExpr->u.zToken;
      nId = sqlite3Strlen30(zId);
      pDef = sqlite3FindFunction(pParse->db, zId, nId, n, enc, 0);
      if( pDef==0 ){
        pDef = sqlite3FindFunction(pParse->db, zId, nId, -2, enc, 0);
        if( pDef==0 ){
          no_such_func = 1;
................................................................................
    case TK_SELECT:
    case TK_EXISTS:  testcase( pExpr->op==TK_EXISTS );
#endif
    case TK_IN: {
      testcase( pExpr->op==TK_IN );
      if( ExprHasProperty(pExpr, EP_xIsSelect) ){
        int nRef = pNC->nRef;
#ifndef SQLITE_OMIT_CHECK
        if( (pNC->ncFlags & NC_IsCheck)!=0 ){
          sqlite3ErrorMsg(pParse,"subqueries prohibited in CHECK constraints");
        }
#endif
        sqlite3WalkSelect(pWalker, pExpr->x.pSelect);
        assert( pNC->nRef>=nRef );
        if( nRef!=pNC->nRef ){
          ExprSetProperty(pExpr, EP_VarSelect);
        }
      }
      break;
    }
#ifndef SQLITE_OMIT_CHECK
    case TK_VARIABLE: {

      if( (pNC->ncFlags & NC_IsCheck)!=0 ){
        sqlite3ErrorMsg(pParse,"parameters prohibited in CHECK constraints");
      }
      break;
    }
#endif
  }
  return (pParse->nErr || pParse->db->mallocFailed) ? WRC_Abort : WRC_Continue;
}

/*
** pEList is a list of expressions which are really the result set of the
** a SELECT statement.  pE is a term in an ORDER BY or GROUP BY clause.
................................................................................
  if( rc ) return 0;

  /* Try to match the ORDER BY expression against an expression
  ** in the result set.  Return an 1-based index of the matching
  ** result-set entry.
  */
  for(i=0; i<pEList->nExpr; i++){
    if( sqlite3ExprCompare(pEList->a[i].pExpr, pE)<2 ){
      return i+1;
    }
  }

  /* If no match, return 0. */
  return 0;
}
................................................................................
  }
  return 0;
}

/*
** Check every term in the ORDER BY or GROUP BY clause pOrderBy of
** the SELECT statement pSelect.  If any term is reference to a
** result set expression (as determined by the ExprList.a.iCol field)
** then convert that term into a copy of the corresponding result set
** column.
**
** If any errors are detected, add an error message to pParse and
** return non-zero.  Return zero if no errors are seen.
*/
SQLITE_PRIVATE int sqlite3ResolveOrderGroupBy(
................................................................................
** The Name context of the SELECT statement is pNC.  zType is either
** "ORDER" or "GROUP" depending on which type of clause pOrderBy is.
**
** This routine resolves each term of the clause into an expression.
** If the order-by term is an integer I between 1 and N (where N is the
** number of columns in the result set of the SELECT) then the expression
** in the resolution is a copy of the I-th result-set expression.  If
** the order-by term is an identify that corresponds to the AS-name of
** a result-set expression, then the term resolves to a copy of the
** result-set expression.  Otherwise, the expression is resolved in
** the usual way - using sqlite3ResolveExprNames().
**
** This routine returns the number of errors.  If errors occur, then
** an appropriate error message might be left in pParse.  (OOM errors
** excepted.)
................................................................................
  int nResult;                   /* Number of terms in the result set */

  if( pOrderBy==0 ) return 0;
  nResult = pSelect->pEList->nExpr;
  pParse = pNC->pParse;
  for(i=0, pItem=pOrderBy->a; i<pOrderBy->nExpr; i++, pItem++){
    Expr *pE = pItem->pExpr;


    iCol = resolveAsName(pParse, pSelect->pEList, pE);
    if( iCol>0 ){
      /* If an AS-name match is found, mark this ORDER BY column as being
      ** a copy of the iCol-th result-set column.  The subsequent call to
      ** sqlite3ResolveOrderGroupBy() will convert the expression to a
      ** copy of the iCol-th result-set expression. */
      pItem->iOrderByCol = (u16)iCol;
      continue;
    }

    if( sqlite3ExprIsInteger(sqlite3ExprSkipCollate(pE), &iCol) ){
      /* The ORDER BY term is an integer constant.  Again, set the column
      ** number so that sqlite3ResolveOrderGroupBy() will convert the
      ** order-by term to a copy of the result-set expression */
      if( iCol<1 || iCol>0xffff ){
        resolveOutOfRangeError(pParse, zType, i+1, nResult);
        return 1;
      }
................................................................................

    /* Otherwise, treat the ORDER BY term as an ordinary expression */
    pItem->iOrderByCol = 0;
    if( sqlite3ResolveExprNames(pNC, pE) ){
      return 1;
    }
    for(j=0; j<pSelect->pEList->nExpr; j++){
      if( sqlite3ExprCompare(pE, pSelect->pEList->a[j].pExpr)==0 ){
        pItem->iOrderByCol = j+1;
      }
    }
  }
  return sqlite3ResolveOrderGroupBy(pParse, pSelect, pOrderBy, zType);
}

................................................................................
    /* If a HAVING clause is present, then there must be a GROUP BY clause.
    */
    if( p->pHaving && !pGroupBy ){
      sqlite3ErrorMsg(pParse, "a GROUP BY clause is required before HAVING");
      return WRC_Abort;
    }
  
    /* Add the expression list to the name-context before parsing the
    ** other expressions in the SELECT statement. This is so that
    ** expressions in the WHERE clause (etc.) can refer to expressions by
    ** aliases in the result set.
    **
    ** Minor point: If this is the case, then the expression will be
    ** re-evaluated for each reference to it.
    */
    sNC.pEList = p->pEList;
    sNC.ncFlags |= NC_AsMaybe;
    if( sqlite3ResolveExprNames(&sNC, p->pHaving) ) return WRC_Abort;
    if( sqlite3ResolveExprNames(&sNC, p->pWhere) ) return WRC_Abort;
    sNC.ncFlags &= ~NC_AsMaybe;

    /* The ORDER BY and GROUP BY clauses may not refer to terms in
    ** outer queries 
    */
    sNC.pNext = 0;
    sNC.ncFlags |= NC_AllowAgg;

................................................................................
  memset(&w, 0, sizeof(w));
  w.xExprCallback = resolveExprStep;
  w.xSelectCallback = resolveSelectStep;
  w.pParse = pParse;
  w.u.pNC = pOuterNC;
  sqlite3WalkSelect(&w, p);
}











































/************** End of resolve.c *********************************************/
/************** Begin file expr.c ********************************************/
/*
** 2001 September 15
**
** The author disclaims copyright to this source code.  In place of
................................................................................
  Expr *p = pExpr;
  while( p ){
    int op = p->op;
    if( op==TK_CAST || op==TK_UPLUS ){
      p = p->pLeft;
      continue;
    }
    assert( op!=TK_REGISTER || p->op2!=TK_COLLATE );
    if( op==TK_COLLATE ){
      pColl = sqlite3GetCollSeq(pParse, ENC(db), 0, p->u.zToken);
      break;
    }
    if( p->pTab!=0
     && (op==TK_AGG_COLUMN || op==TK_COLUMN
          || op==TK_REGISTER || op==TK_TRIGGER)
    ){
................................................................................
  for(i=0; i<p->nExpr; i++, pItem++, pOldItem++){
    Expr *pOldExpr = pOldItem->pExpr;
    pItem->pExpr = sqlite3ExprDup(db, pOldExpr, flags);
    pItem->zName = sqlite3DbStrDup(db, pOldItem->zName);
    pItem->zSpan = sqlite3DbStrDup(db, pOldItem->zSpan);
    pItem->sortOrder = pOldItem->sortOrder;
    pItem->done = 0;

    pItem->iOrderByCol = pOldItem->iOrderByCol;
    pItem->iAlias = pOldItem->iAlias;
  }
  return pNew;
}

/*
................................................................................
    case TK_UPLUS: {
      rc = sqlite3ExprIsInteger(p->pLeft, pValue);
      break;
    }
    case TK_UMINUS: {
      int v;
      if( sqlite3ExprIsInteger(p->pLeft, &v) ){

        *pValue = -v;
        rc = 1;
      }
      break;
    }
    default: break;
  }
................................................................................
    }
  }

  if( eType==0 ){
    /* Could not found an existing table or index to use as the RHS b-tree.
    ** We will have to generate an ephemeral table to do the job.
    */
    double savedNQueryLoop = pParse->nQueryLoop;
    int rMayHaveNull = 0;
    eType = IN_INDEX_EPH;
    if( prNotFound ){
      *prNotFound = rMayHaveNull = ++pParse->nMem;
      sqlite3VdbeAddOp2(v, OP_Null, 0, *prNotFound);
    }else{
      testcase( pParse->nQueryLoop>(double)1 );
      pParse->nQueryLoop = (double)1;
      if( pX->pLeft->iColumn<0 && !ExprHasAnyProperty(pX, EP_xIsSelect) ){
        eType = IN_INDEX_ROWID;
      }
    }
    sqlite3CodeSubselect(pParse, pX, rMayHaveNull, eType==IN_INDEX_ROWID);
    pParse->nQueryLoop = savedNQueryLoop;
  }else{
................................................................................
** to iterate over the RHS of the IN operator in order to quickly locate
** all corresponding LHS elements.  All this routine does is initialize
** the register given by rMayHaveNull to NULL.  Calling routines will take
** care of changing this register value to non-NULL if the RHS is NULL-free.
**
** If rMayHaveNull is zero, that means that the subquery is being used
** for membership testing only.  There is no need to initialize any
** registers to indicate the presense or absence of NULLs on the RHS.
**
** For a SELECT or EXISTS operator, return the register that holds the
** result.  For IN operators or if an error occurs, the return value is 0.
*/
#ifndef SQLITE_OMIT_SUBQUERY
SQLITE_PRIVATE int sqlite3CodeSubselect(
  Parse *pParse,          /* Parsing context */
................................................................................
    sqlite3VdbeAddOp4(v, OP_Explain, pParse->iSelectId, 0, 0, zMsg, P4_DYNAMIC);
  }
#endif

  switch( pExpr->op ){
    case TK_IN: {
      char affinity;              /* Affinity of the LHS of the IN */
      KeyInfo keyInfo;            /* Keyinfo for the generated table */
      static u8 sortOrder = 0;    /* Fake aSortOrder for keyInfo */
      int addr;                   /* Address of OP_OpenEphemeral instruction */
      Expr *pLeft = pExpr->pLeft; /* the LHS of the IN operator */


      if( rMayHaveNull ){
        sqlite3VdbeAddOp2(v, OP_Null, 0, rMayHaveNull);
      }

      affinity = sqlite3ExprAffinity(pLeft);

................................................................................
      ** if either column has NUMERIC or INTEGER affinity. If neither
      ** 'x' nor the SELECT... statement are columns, then numeric affinity
      ** is used.
      */
      pExpr->iTable = pParse->nTab++;
      addr = sqlite3VdbeAddOp2(v, OP_OpenEphemeral, pExpr->iTable, !isRowid);
      if( rMayHaveNull==0 ) sqlite3VdbeChangeP5(v, BTREE_UNORDERED);
      memset(&keyInfo, 0, sizeof(keyInfo));
      keyInfo.nField = 1;
      keyInfo.aSortOrder = &sortOrder;

      if( ExprHasProperty(pExpr, EP_xIsSelect) ){
        /* Case 1:     expr IN (SELECT ...)
        **
        ** Generate code to write the results of the select into the temporary
        ** table allocated and opened above.
        */
................................................................................
        ExprList *pEList;

        assert( !isRowid );
        sqlite3SelectDestInit(&dest, SRT_Set, pExpr->iTable);
        dest.affSdst = (u8)affinity;
        assert( (pExpr->iTable&0x0000FFFF)==pExpr->iTable );
        pExpr->x.pSelect->iLimit = 0;

        if( sqlite3Select(pParse, pExpr->x.pSelect, &dest) ){

          return 0;
        }
        pEList = pExpr->x.pSelect->pEList;


        if( ALWAYS(pEList!=0 && pEList->nExpr>0) ){ 
          keyInfo.aColl[0] = sqlite3BinaryCompareCollSeq(pParse, pExpr->pLeft,
              pEList->a[0].pExpr);
        }
      }else if( ALWAYS(pExpr->x.pList!=0) ){
        /* Case 2:     expr IN (exprlist)
        **
        ** For each expression, build an index key from the evaluation and
        ** store it in the temporary table. If <expr> is a column, then use
        ** that columns affinity when building index keys. If <expr> is not
        ** a column, use numeric affinity.
................................................................................
        ExprList *pList = pExpr->x.pList;
        struct ExprList_item *pItem;
        int r1, r2, r3;

        if( !affinity ){
          affinity = SQLITE_AFF_NONE;
        }

        keyInfo.aColl[0] = sqlite3ExprCollSeq(pParse, pExpr->pLeft);
        keyInfo.aSortOrder = &sortOrder;


        /* Loop through each expression in <exprlist>. */
        r1 = sqlite3GetTempReg(pParse);
        r2 = sqlite3GetTempReg(pParse);
        sqlite3VdbeAddOp2(v, OP_Null, 0, r2);
        for(i=pList->nExpr, pItem=pList->a; i>0; i--, pItem++){
          Expr *pE2 = pItem->pExpr;
................................................................................
              sqlite3VdbeAddOp2(v, OP_IdxInsert, pExpr->iTable, r2);
            }
          }
        }
        sqlite3ReleaseTempReg(pParse, r1);
        sqlite3ReleaseTempReg(pParse, r2);
      }
      if( !isRowid ){
        sqlite3VdbeChangeP4(v, addr, (void *)&keyInfo, P4_KEYINFO);
      }
      break;
    }

    case TK_EXISTS:
    case TK_SELECT:
    default: {
................................................................................
        sqlite3VdbeAddOp3(v, OP_Column, pAggInfo->sortingIdxPTab,
                              pCol->iSorterColumn, target);
        break;
      }
      /* Otherwise, fall thru into the TK_COLUMN case */
    }
    case TK_COLUMN: {
      if( pExpr->iTable<0 ){
        /* This only happens when coding check constraints */
        assert( pParse->ckBase>0 );

        inReg = pExpr->iColumn + pParse->ckBase;

      }else{




        inReg = sqlite3ExprCodeGetColumn(pParse, pExpr->pTab,
                                 pExpr->iColumn, pExpr->iTable, target,
                                 pExpr->op2);
      }
      break;
    }
    case TK_INTEGER: {
      codeInteger(pParse, pExpr, 0, target);
      break;
    }
#ifndef SQLITE_OMIT_FLOATING_POINT
................................................................................
  compLeft.op = TK_GE;
  compLeft.pLeft = &exprX;
  compLeft.pRight = pExpr->x.pList->a[0].pExpr;
  compRight.op = TK_LE;
  compRight.pLeft = &exprX;
  compRight.pRight = pExpr->x.pList->a[1].pExpr;
  exprX.iTable = sqlite3ExprCodeTemp(pParse, &exprX, &regFree1);

  exprX.op = TK_REGISTER;
  if( jumpIfTrue ){
    sqlite3ExprIfTrue(pParse, &exprAnd, dest, jumpIfNull);
  }else{
    sqlite3ExprIfFalse(pParse, &exprAnd, dest, jumpIfNull);
  }
  sqlite3ReleaseTempReg(pParse, regFree1);
................................................................................

/*
** Do a deep comparison of two expression trees.  Return 0 if the two
** expressions are completely identical.  Return 1 if they differ only
** by a COLLATE operator at the top level.  Return 2 if there are differences
** other than the top-level COLLATE operator.
**






** Sometimes this routine will return 2 even if the two expressions
** really are equivalent.  If we cannot prove that the expressions are
** identical, we return 2 just to be safe.  So if this routine
** returns 2, then you do not really know for certain if the two
** expressions are the same.  But if you get a 0 or 1 return, then you
** can be sure the expressions are the same.  In the places where
** this routine is used, it does not hurt to get an extra 2 - that
** just might result in some slightly slower code.  But returning
** an incorrect 0 or 1 could lead to a malfunction.
*/
SQLITE_PRIVATE int sqlite3ExprCompare(Expr *pA, Expr *pB){
  if( pA==0||pB==0 ){
    return pB==pA ? 0 : 2;
  }
  assert( !ExprHasAnyProperty(pA, EP_TokenOnly|EP_Reduced) );
  assert( !ExprHasAnyProperty(pB, EP_TokenOnly|EP_Reduced) );
  if( ExprHasProperty(pA, EP_xIsSelect) || ExprHasProperty(pB, EP_xIsSelect) ){
    return 2;
  }
  if( (pA->flags & EP_Distinct)!=(pB->flags & EP_Distinct) ) return 2;
  if( pA->op!=pB->op ){
    if( pA->op==TK_COLLATE && sqlite3ExprCompare(pA->pLeft, pB)<2 ){
      return 1;
    }
    if( pB->op==TK_COLLATE && sqlite3ExprCompare(pA, pB->pLeft)<2 ){
      return 1;
    }
    return 2;
  }
  if( sqlite3ExprCompare(pA->pLeft, pB->pLeft) ) return 2;
  if( sqlite3ExprCompare(pA->pRight, pB->pRight) ) return 2;
  if( sqlite3ExprListCompare(pA->x.pList, pB->x.pList) ) return 2;
  if( pA->iTable!=pB->iTable || pA->iColumn!=pB->iColumn ) return 2;



  if( ExprHasProperty(pA, EP_IntValue) ){
    if( !ExprHasProperty(pB, EP_IntValue) || pA->u.iValue!=pB->u.iValue ){
      return 2;
    }
  }else if( pA->op!=TK_COLUMN && ALWAYS(pA->op!=TK_AGG_COLUMN) && pA->u.zToken){
    if( ExprHasProperty(pB, EP_IntValue) || NEVER(pB->u.zToken==0) ) return 2;
    if( strcmp(pA->u.zToken,pB->u.zToken)!=0 ){
................................................................................
  return 0;
}

/*
** Compare two ExprList objects.  Return 0 if they are identical and 
** non-zero if they differ in any way.
**



** This routine might return non-zero for equivalent ExprLists.  The
** only consequence will be disabled optimizations.  But this routine
** must never return 0 if the two ExprList objects are different, or
** a malfunction will result.
**
** Two NULL pointers are considered to be the same.  But a NULL pointer
** always differs from a non-NULL pointer.
*/
SQLITE_PRIVATE int sqlite3ExprListCompare(ExprList *pA, ExprList *pB){
  int i;
  if( pA==0 && pB==0 ) return 0;
  if( pA==0 || pB==0 ) return 1;
  if( pA->nExpr!=pB->nExpr ) return 1;
  for(i=0; i<pA->nExpr; i++){
    Expr *pExprA = pA->a[i].pExpr;
    Expr *pExprB = pB->a[i].pExpr;
    if( pA->a[i].sortOrder!=pB->a[i].sortOrder ) return 1;
    if( sqlite3ExprCompare(pExprA, pExprB) ) return 1;







































  }
  return 0;
}

/*
** An instance of the following structure is used by the tree walker
** to count references to table columns in the arguments of an 
................................................................................
       && pWalker->walkerDepth==pExpr->op2
      ){
        /* Check to see if pExpr is a duplicate of another aggregate 
        ** function that is already in the pAggInfo structure
        */
        struct AggInfo_func *pItem = pAggInfo->aFunc;
        for(i=0; i<pAggInfo->nFunc; i++, pItem++){
          if( sqlite3ExprCompare(pItem->pExpr, pExpr)==0 ){
            break;
          }
        }
        if( i>=pAggInfo->nFunc ){
          /* pExpr is original.  Make a new entry in pAggInfo->aFunc[]
          */
          u8 enc = ENC(pParse->db);
................................................................................
**    CREATE TABLE sqlite_stat2(tbl, idx, sampleno, sample);
**    CREATE TABLE sqlite_stat3(tbl, idx, nEq, nLt, nDLt, sample);
**
** Additional tables might be added in future releases of SQLite.
** The sqlite_stat2 table is not created or used unless the SQLite version
** is between 3.6.18 and 3.7.8, inclusive, and unless SQLite is compiled
** with SQLITE_ENABLE_STAT2.  The sqlite_stat2 table is deprecated.
** The sqlite_stat2 table is superceded by sqlite_stat3, which is only
** created and used by SQLite versions 3.7.9 and later and with
** SQLITE_ENABLE_STAT3 defined.  The fucntionality of sqlite_stat3
** is a superset of sqlite_stat2.  
**
** Format of sqlite_stat1:
**
** There is normally one row per index, with the index identified by the
................................................................................
  int iIdxCur;                 /* Cursor open on index being analyzed */
  Vdbe *v;                     /* The virtual machine being built up */
  int i;                       /* Loop counter */
  int topOfLoop;               /* The top of the loop */
  int endOfLoop;               /* The end of the loop */
  int jZeroRows = -1;          /* Jump from here if number of rows is zero */
  int iDb;                     /* Index of database containing pTab */

  int regTabname = iMem++;     /* Register containing table name */
  int regIdxname = iMem++;     /* Register containing index name */
  int regStat1 = iMem++;       /* The stat column of sqlite_stat1 */
#ifdef SQLITE_ENABLE_STAT3
  int regNumEq = regStat1;     /* Number of instances.  Same as regStat1 */
  int regNumLt = iMem++;       /* Number of keys less than regSample */
  int regNumDLt = iMem++;      /* Number of distinct keys less than regSample */
................................................................................
  for(pIdx=pTab->pIndex; pIdx; pIdx=pIdx->pNext){
    int nCol;
    KeyInfo *pKey;
    int addrIfNot = 0;           /* address of OP_IfNot */
    int *aChngAddr;              /* Array of jump instruction addresses */

    if( pOnlyIdx && pOnlyIdx!=pIdx ) continue;

    VdbeNoopComment((v, "Begin analysis of %s", pIdx->zName));
    nCol = pIdx->nColumn;
    aChngAddr = sqlite3DbMallocRaw(db, sizeof(int)*nCol);
    if( aChngAddr==0 ) continue;
    pKey = sqlite3IndexKeyinfo(pParse, pIdx);
    if( iMem+1+(nCol*2)>pParse->nMem ){
      pParse->nMem = iMem+1+(nCol*2);
................................................................................
    **        I = (K+D-1)/D
    **
    ** If K==0 then no entry is made into the sqlite_stat1 table.  
    ** If K>0 then it is always the case the D>0 so division by zero
    ** is never possible.
    */
    sqlite3VdbeAddOp2(v, OP_SCopy, iMem, regStat1);
    if( jZeroRows<0 ){
      jZeroRows = sqlite3VdbeAddOp1(v, OP_IfNot, iMem);
    }
    for(i=0; i<nCol; i++){
      sqlite3VdbeAddOp4(v, OP_String8, 0, regTemp, 0, " ", 0);
      sqlite3VdbeAddOp3(v, OP_Concat, regTemp, regStat1, regStat1);
      sqlite3VdbeAddOp3(v, OP_Add, iMem, iMem+i+1, regTemp);
      sqlite3VdbeAddOp2(v, OP_AddImm, regTemp, -1);
      sqlite3VdbeAddOp3(v, OP_Divide, iMem+i+1, regTemp, regTemp);
      sqlite3VdbeAddOp1(v, OP_ToInt, regTemp);
      sqlite3VdbeAddOp3(v, OP_Concat, regTemp, regStat1, regStat1);
    }

    sqlite3VdbeAddOp4(v, OP_MakeRecord, regTabname, 3, regRec, "aaa", 0);
    sqlite3VdbeAddOp2(v, OP_NewRowid, iStatCur, regNewRowid);
    sqlite3VdbeAddOp3(v, OP_Insert, iStatCur, regRec, regNewRowid);
    sqlite3VdbeChangeP5(v, OPFLAG_APPEND);

  }

  /* If the table has no indices, create a single sqlite_stat1 entry
  ** containing NULL as the index name and the row count as the content.
  */
  if( pTab->pIndex==0 ){

    sqlite3VdbeAddOp3(v, OP_OpenRead, iIdxCur, pTab->tnum, iDb);
    VdbeComment((v, "%s", pTab->zName));
    sqlite3VdbeAddOp2(v, OP_Count, iIdxCur, regStat1);
    sqlite3VdbeAddOp1(v, OP_Close, iIdxCur);
    jZeroRows = sqlite3VdbeAddOp1(v, OP_IfNot, regStat1);
  }else{
    sqlite3VdbeJumpHere(v, jZeroRows);
    jZeroRows = sqlite3VdbeAddOp0(v, OP_Goto);
  }
  sqlite3VdbeAddOp2(v, OP_Null, 0, regIdxname);
  sqlite3VdbeAddOp4(v, OP_MakeRecord, regTabname, 3, regRec, "aaa", 0);
  sqlite3VdbeAddOp2(v, OP_NewRowid, iStatCur, regNewRowid);
  sqlite3VdbeAddOp3(v, OP_Insert, iStatCur, regRec, regNewRowid);
  sqlite3VdbeChangeP5(v, OPFLAG_APPEND);
  if( pParse->nMem<regRec ) pParse->nMem = regRec;
  sqlite3VdbeJumpHere(v, jZeroRows);


}


/*
** Generate code that will cause the most recent index analysis to
** be loaded into internal hash tables where is can be used.
*/
................................................................................
  z = argv[2];
  for(i=0; *z && i<=n; i++){
    v = 0;
    while( (c=z[0])>='0' && c<='9' ){
      v = v*10 + c - '0';
      z++;
    }

    if( i==0 ) pTable->nRowEst = v;
    if( pIndex==0 ) break;

    pIndex->aiRowEst[i] = v;
    if( *z==' ' ) z++;
    if( strcmp(z, "unordered")==0 ){
      pIndex->bUnordered = 1;
      break;
    }
  }
................................................................................
        "attached databases must use the same text encoding as main database");
      rc = SQLITE_ERROR;
    }
    pPager = sqlite3BtreePager(aNew->pBt);
    sqlite3PagerLockingMode(pPager, db->dfltLockMode);
    sqlite3BtreeSecureDelete(aNew->pBt,
                             sqlite3BtreeSecureDelete(db->aDb[0].pBt,-1) );

  }
  aNew->safety_level = 3;
  aNew->zName = sqlite3DbStrDup(db, zName);
  if( rc==SQLITE_OK && aNew->zName==0 ){
    rc = SQLITE_NOMEM;
  }

................................................................................
/*
** Reclaim the memory used by an index
*/
static void freeIndex(sqlite3 *db, Index *p){
#ifndef SQLITE_OMIT_ANALYZE
  sqlite3DeleteIndexSamples(db, p);
#endif

  sqlite3DbFree(db, p->zColAff);
  sqlite3DbFree(db, p);
}

/*
** For the index called zIdxName which is found in the database iDb,
** unlike that index from its Table then remove the index from
................................................................................
  }else if( autoInc ){
#ifndef SQLITE_OMIT_AUTOINCREMENT
    sqlite3ErrorMsg(pParse, "AUTOINCREMENT is only allowed on an "
       "INTEGER PRIMARY KEY");
#endif
  }else{
    Index *p;
    p = sqlite3CreateIndex(pParse, 0, 0, 0, pList, onError, 0, 0, sortOrder, 0);

    if( p ){
      p->autoIndex = 2;
    }
    pList = 0;
  }

primary_key_exit:
................................................................................
  i = p->nCol-1;
  db = pParse->db;
  zColl = sqlite3NameFromToken(db, pToken);
  if( !zColl ) return;

  if( sqlite3LocateCollSeq(pParse, zColl) ){
    Index *pIdx;

    p->aCol[i].zColl = zColl;
  
    /* If the column is declared as "<name> PRIMARY KEY COLLATE <type>",
    ** then an index may have been created on this column before the
    ** collation type was added. Correct this if it is the case.
    */
    for(pIdx=p->pIndex; pIdx; pIdx=pIdx->pNext){
................................................................................

  iDb = sqlite3SchemaToIndex(db, p->pSchema);

#ifndef SQLITE_OMIT_CHECK
  /* Resolve names in all CHECK constraint expressions.
  */
  if( p->pCheck ){
    SrcList sSrc;                   /* Fake SrcList for pParse->pNewTable */
    NameContext sNC;                /* Name context for pParse->pNewTable */
    ExprList *pList;                /* List of all CHECK constraints */
    int i;                          /* Loop counter */

    memset(&sNC, 0, sizeof(sNC));
    memset(&sSrc, 0, sizeof(sSrc));
    sSrc.nSrc = 1;
    sSrc.a[0].zName = p->zName;
    sSrc.a[0].pTab = p;
    sSrc.a[0].iCursor = -1;
    sNC.pParse = pParse;
    sNC.pSrcList = &sSrc;
    sNC.ncFlags = NC_IsCheck;
    pList = p->pCheck;
    for(i=0; i<pList->nExpr; i++){
      if( sqlite3ResolveExprNames(&sNC, pList->a[i].pExpr) ){
        return;
      }
    }
  }
#endif /* !defined(SQLITE_OMIT_CHECK) */

  /* If the db->init.busy is 1 it means we are reading the SQL off the
  ** "sqlite_master" or "sqlite_temp_master" table on the disk.
  ** So do not write to the disk again.  Extract the root page number
  ** for the table from the db->init.newTnum field.  (The page number
................................................................................
  Table *pTab = pIndex->pTable;  /* The table that is indexed */
  int iTab = pParse->nTab++;     /* Btree cursor used for pTab */
  int iIdx = pParse->nTab++;     /* Btree cursor used for pIndex */
  int iSorter;                   /* Cursor opened by OpenSorter (if in use) */
  int addr1;                     /* Address of top of loop */
  int addr2;                     /* Address to jump to for next iteration */
  int tnum;                      /* Root page of index */

  Vdbe *v;                       /* Generate code into this virtual machine */
  KeyInfo *pKey;                 /* KeyInfo for index */
  int regRecord;                 /* Register holding assemblied index record */
  sqlite3 *db = pParse->db;      /* The database connection */
  int iDb = sqlite3SchemaToIndex(db, pIndex->pSchema);

#ifndef SQLITE_OMIT_AUTHORIZATION
................................................................................

  /* Open the table. Loop through all rows of the table, inserting index
  ** records into the sorter. */
  sqlite3OpenTable(pParse, iTab, iDb, pTab, OP_OpenRead);
  addr1 = sqlite3VdbeAddOp2(v, OP_Rewind, iTab, 0);
  regRecord = sqlite3GetTempReg(pParse);

  sqlite3GenerateIndexKey(pParse, pIndex, iTab, regRecord, 1);
  sqlite3VdbeAddOp2(v, OP_SorterInsert, iSorter, regRecord);

  sqlite3VdbeAddOp2(v, OP_Next, iTab, addr1+1);
  sqlite3VdbeJumpHere(v, addr1);
  addr1 = sqlite3VdbeAddOp2(v, OP_SorterSort, iSorter, 0);
  if( pIndex->onError!=OE_None ){
    int j2 = sqlite3VdbeCurrentAddr(v) + 3;
    sqlite3VdbeAddOp2(v, OP_Goto, 0, j2);
    addr2 = sqlite3VdbeCurrentAddr(v);
................................................................................
  Parse *pParse,     /* All information about this parse */
  Token *pName1,     /* First part of index name. May be NULL */
  Token *pName2,     /* Second part of index name. May be NULL */
  SrcList *pTblName, /* Table to index. Use pParse->pNewTable if 0 */
  ExprList *pList,   /* A list of columns to be indexed */
  int onError,       /* OE_Abort, OE_Ignore, OE_Replace, or OE_None */
  Token *pStart,     /* The CREATE token that begins this statement */
  Token *pEnd,       /* The ")" that closes the CREATE INDEX statement */
  int sortOrder,     /* Sort order of primary key when pList==NULL */
  int ifNotExist     /* Omit error if index already exists */
){
  Index *pRet = 0;     /* Pointer to return */
  Table *pTab = 0;     /* Table to be indexed */
  Index *pIndex = 0;   /* The index to be created */
  char *zName = 0;     /* Name of the index */
................................................................................
  int iDb;             /* Index of the database that is being written */
  Token *pName = 0;    /* Unqualified name of the index to create */
  struct ExprList_item *pListItem; /* For looping over pList */
  int nCol;
  int nExtra = 0;
  char *zExtra;

  assert( pStart==0 || pEnd!=0 ); /* pEnd must be non-NULL if pStart is */
  assert( pParse->nErr==0 );      /* Never called with prior errors */
  if( db->mallocFailed || IN_DECLARE_VTAB ){
    goto exit_create_index;
  }
  if( SQLITE_OK!=sqlite3ReadSchema(pParse) ){
    goto exit_create_index;
  }
................................................................................
      /* Because the parser constructs pTblName from a single identifier,
      ** sqlite3FixSrcList can never fail. */
      assert(0);
    }
    pTab = sqlite3LocateTableItem(pParse, 0, &pTblName->a[0]);
    assert( db->mallocFailed==0 || pTab==0 );
    if( pTab==0 ) goto exit_create_index;
    assert( db->aDb[iDb].pSchema==pTab->pSchema );





  }else{
    assert( pName==0 );
    assert( pStart==0 );
    pTab = pParse->pNewTable;
    if( !pTab ) goto exit_create_index;
    iDb = sqlite3SchemaToIndex(db, pTab->pSchema);
  }
................................................................................
  pIndex->aSortOrder = (u8 *)(&pIndex->aiColumn[nCol]);
  pIndex->zName = (char *)(&pIndex->aSortOrder[nCol]);
  zExtra = (char *)(&pIndex->zName[nName+1]);
  memcpy(pIndex->zName, zName, nName+1);
  pIndex->pTable = pTab;
  pIndex->nColumn = pList->nExpr;
  pIndex->onError = (u8)onError;

  pIndex->autoIndex = (u8)(pName==0);
  pIndex->pSchema = db->aDb[iDb].pSchema;





  assert( sqlite3SchemaMutexHeld(db, iDb, 0) );

  /* Check to see if we should honor DESC requests on index columns
  */
  if( pDb->pSchema->file_format>=4 ){
    sortOrderMask = -1;   /* Honor DESC */
  }else{
................................................................................
    }
    if( !db->init.busy && !sqlite3LocateCollSeq(pParse, zColl) ){
      goto exit_create_index;
    }
    pIndex->azColl[i] = zColl;
    requestedSortOrder = pListItem->sortOrder & sortOrderMask;
    pIndex->aSortOrder[i] = (u8)requestedSortOrder;

  }
  sqlite3DefaultRowEst(pIndex);

  if( pTab==pParse->pNewTable ){
    /* This routine has been called to create an automatic index as a
    ** result of a PRIMARY KEY or UNIQUE clause on a column definition, or
    ** a PRIMARY KEY or UNIQUE clause following the column definitions.
................................................................................
  ** we don't want to recreate it.
  **
  ** If pTblName==0 it means this index is generated as a primary key
  ** or UNIQUE constraint of a CREATE TABLE statement.  Since the table
  ** has just been created, it contains no data and the index initialization
  ** step can be skipped.
  */
  else{ /* if( db->init.busy==0 ) */
    Vdbe *v;
    char *zStmt;
    int iMem = ++pParse->nMem;

    v = sqlite3GetVdbe(pParse);
    if( v==0 ) goto exit_create_index;

................................................................................
    sqlite3BeginWriteOperation(pParse, 1, iDb);
    sqlite3VdbeAddOp2(v, OP_CreateIndex, iDb, iMem);

    /* Gather the complete text of the CREATE INDEX statement into
    ** the zStmt variable
    */
    if( pStart ){
      assert( pEnd!=0 );

      /* A named index with an explicit CREATE INDEX statement */
      zStmt = sqlite3MPrintf(db, "CREATE%s INDEX %.*s",
        onError==OE_None ? "" : " UNIQUE",
        (int)(pEnd->z - pName->z) + 1,
        pName->z);
    }else{
      /* An automatic index created by a PRIMARY KEY or UNIQUE constraint */
      /* zStmt = sqlite3MPrintf(""); */
      zStmt = 0;
    }

    /* Add an entry in sqlite_master for this index
................................................................................
    }
    pRet = pIndex;
    pIndex = 0;
  }

  /* Clean up before exiting */
exit_create_index:
  if( pIndex ){
    sqlite3DbFree(db, pIndex->zColAff);
    sqlite3DbFree(db, pIndex);
  }
  sqlite3ExprListDelete(db, pList);
  sqlite3SrcListDelete(db, pTblName);
  sqlite3DbFree(db, zName);
  return pRet;
}

/*
................................................................................
               sizeof(*pSrc) + (nAlloc-1)*sizeof(pSrc->a[0]) );
    if( pNew==0 ){
      assert( db->mallocFailed );
      return pSrc;
    }
    pSrc = pNew;
    nGot = (sqlite3DbMallocSize(db, pNew) - sizeof(*pSrc))/sizeof(pSrc->a[0])+1;
    pSrc->nAlloc = (u16)nGot;
  }

  /* Move existing slots that come after the newly inserted slots
  ** out of the way */
  for(i=pSrc->nSrc-1; i>=iStart; i--){
    pSrc->a[i+nExtra] = pSrc->a[i];
  }
  pSrc->nSrc += (i16)nExtra;

  /* Zero the newly allocated slots */
  memset(&pSrc->a[iStart], 0, sizeof(pSrc->a[0])*nExtra);
  for(i=iStart; i<iStart+nExtra; i++){
    pSrc->a[i].iCursor = -1;
  }

................................................................................
** pointer. If an error occurs (out of memory or missing collation 
** sequence), NULL is returned and the state of pParse updated to reflect
** the error.
*/
SQLITE_PRIVATE KeyInfo *sqlite3IndexKeyinfo(Parse *pParse, Index *pIdx){
  int i;
  int nCol = pIdx->nColumn;
  int nBytes = sizeof(KeyInfo) + (nCol-1)*sizeof(CollSeq*) + nCol;
  sqlite3 *db = pParse->db;
  KeyInfo *pKey = (KeyInfo *)sqlite3DbMallocZero(db, nBytes);


  if( pKey ){
    pKey->db = pParse->db;
    pKey->aSortOrder = (u8 *)&(pKey->aColl[nCol]);
    assert( &pKey->aSortOrder[nCol]==&(((u8 *)pKey)[nBytes]) );
    for(i=0; i<nCol; i++){
      char *zColl = pIdx->azColl[i];
      assert( zColl );
      pKey->aColl[i] = sqlite3LocateCollSeq(pParse, zColl);
      pKey->aSortOrder[i] = pIdx->aSortOrder[i];
    }
    pKey->nField = (u16)nCol;
  }

  if( pParse->nErr ){
    sqlite3DbFree(db, pKey);
    pKey = 0;
  }
  return pKey;
}

/************** End of build.c ***********************************************/
/************** Begin file callback.c ****************************************/
................................................................................
  Table *pTab,       /* Table containing the row to be deleted */
  int iCur,          /* Cursor number for the table */
  int *aRegIdx       /* Only delete if aRegIdx!=0 && aRegIdx[i]>0 */
){
  int i;
  Index *pIdx;
  int r1;



  for(i=1, pIdx=pTab->pIndex; pIdx; i++, pIdx=pIdx->pNext){
    if( aRegIdx!=0 && aRegIdx[i-1]==0 ) continue;
    r1 = sqlite3GenerateIndexKey(pParse, pIdx, iCur, 0, 0);
    sqlite3VdbeAddOp3(pParse->pVdbe, OP_IdxDelete, iCur+i, r1,pIdx->nColumn+1);

  }
}

/*
** Generate code that will assemble an index key and put it in register
** regOut.  The key with be for index pIdx which is an index on pTab.
** iCur is the index of a cursor open on the pTab table and pointing to
** the entry that needs indexing.
**
** Return a register number which is the first in a block of
** registers that holds the elements of the index key.  The
** block of registers has already been deallocated by the time
** this routine returns.







*/
SQLITE_PRIVATE int sqlite3GenerateIndexKey(
  Parse *pParse,     /* Parsing context */
  Index *pIdx,       /* The index for which to generate a key */
  int iCur,          /* Cursor number for the pIdx->pTable table */
  int regOut,        /* Write the new index key to this register */
  int doMakeRec      /* Run the OP_MakeRecord instruction if true */

){
  Vdbe *v = pParse->pVdbe;
  int j;
  Table *pTab = pIdx->pTable;
  int regBase;
  int nCol;











  nCol = pIdx->nColumn;
  regBase = sqlite3GetTempRange(pParse, nCol+1);
  sqlite3VdbeAddOp2(v, OP_Rowid, iCur, regBase+nCol);
  for(j=0; j<nCol; j++){
    int idx = pIdx->aiColumn[j];
    if( idx==pTab->iPKey ){
      sqlite3VdbeAddOp2(v, OP_SCopy, regBase+nCol, regBase+j);
................................................................................
** substr(x,p1,p2)  returns p2 characters of x[] beginning with p1.
** p1 is 1-indexed.  So substr(x,1,1) returns the first character
** of x.  If x is text, then we actually count UTF-8 characters.
** If x is a blob, then we count bytes.
**
** If p1 is negative, then we begin abs(p1) from the end of x[].
**
** If p2 is negative, return the p2 characters preceeding p1.
*/
static void substrFunc(
  sqlite3_context *context,
  int argc,
  sqlite3_value **argv
){
  const unsigned char *z;
................................................................................
** digits. */
static const char hexdigits[] = {
  '0', '1', '2', '3', '4', '5', '6', '7',
  '8', '9', 'A', 'B', 'C', 'D', 'E', 'F' 
};

/*
** EXPERIMENTAL - This is not an official function.  The interface may
** change.  This function may disappear.  Do not write code that depends
** on this function.
**
** Implementation of the QUOTE() function.  This function takes a single
** argument.  If the argument is numeric, the return value is the same as
** the argument.  If the argument is NULL, the return value is the string
** "NULL".  Otherwise, the argument is enclosed in single quotes with
** single-quote escapes.
*/
static void quoteFunc(sqlite3_context *context, int argc, sqlite3_value **argv){
................................................................................
    sqlite3_result_zeroblob(context, (int)n); /* IMP: R-00293-64994 */
  }
}

/*
** The replace() function.  Three arguments are all strings: call
** them A, B, and C. The result is also a string which is derived
** from A by replacing every occurance of B with C.  The match
** must be exact.  Collating sequences are not used.
*/
static void replaceFunc(
  sqlite3_context *context,
  int argc,
  sqlite3_value **argv
){
................................................................................
    sqlite3StrAccumAppend(pAccum, zVal, nVal);
  }
}
static void groupConcatFinalize(sqlite3_context *context){
  StrAccum *pAccum;
  pAccum = sqlite3_aggregate_context(context, 0);
  if( pAccum ){
    if( pAccum->tooBig ){
      sqlite3_result_error_toobig(context);
    }else if( pAccum->mallocFailed ){
      sqlite3_result_error_nomem(context);
    }else{    
      sqlite3_result_text(context, sqlite3StrAccumFinish(pAccum), -1, 
                          sqlite3_free);
    }
  }
}
................................................................................
      sqlite3VdbeAddOp4Int(v, OP_Found, iCur, iOk, regRec, 0);
  
      sqlite3ReleaseTempReg(pParse, regRec);
      sqlite3ReleaseTempRange(pParse, regTemp, nCol);
    }
  }



  if( !pFKey->isDeferred && !pParse->pToplevel && !pParse->isMultiWrite ){

    /* Special case: If this is an INSERT statement that will insert exactly
    ** one row into the table, raise a constraint immediately instead of
    ** incrementing a counter. This is necessary as the VM code is being
    ** generated for will not open a statement transaction.  */
    assert( nIncr==1 );
    sqlite3HaltConstraint(pParse, SQLITE_CONSTRAINT_FOREIGNKEY,
        OE_Abort, "foreign key constraint failed", P4_STATIC
................................................................................

  /* Loop through all the foreign key constraints that refer to this table */
  for(pFKey = sqlite3FkReferences(pTab); pFKey; pFKey=pFKey->pNextTo){
    Index *pIdx = 0;              /* Foreign key index for pFKey */
    SrcList *pSrc;
    int *aiCol = 0;


    if( !pFKey->isDeferred && !pParse->pToplevel && !pParse->isMultiWrite ){

      assert( regOld==0 && regNew!=0 );
      /* Inserting a single row into a parent table cannot cause an immediate
      ** foreign key violation. So do nothing in this case.  */
      continue;
    }

    if( sqlite3FkLocateIndex(pParse, pTab, pFKey, &pIdx, &aiCol) ){
................................................................................
  /* Test all UNIQUE constraints by creating entries for each UNIQUE
  ** index and making sure that duplicate entries do not already exist.
  ** Add the new records to the indices as we go.
  */
  for(iCur=0, pIdx=pTab->pIndex; pIdx; pIdx=pIdx->pNext, iCur++){
    int regIdx;
    int regR;


    if( aRegIdx[iCur]==0 ) continue;  /* Skip unused indices */










    /* Create a key for accessing the index entry */
    regIdx = sqlite3GetTempRange(pParse, pIdx->nColumn+1);
    for(i=0; i<pIdx->nColumn; i++){
      int idx = pIdx->aiColumn[i];
      if( idx==pTab->iPKey ){
        sqlite3VdbeAddOp2(v, OP_SCopy, regRowid, regIdx+i);
................................................................................
    sqlite3VdbeChangeP4(v, -1, sqlite3IndexAffinityStr(v, pIdx), P4_TRANSIENT);
    sqlite3ExprCacheAffinityChange(pParse, regIdx, pIdx->nColumn+1);

    /* Find out what action to take in case there is an indexing conflict */
    onError = pIdx->onError;
    if( onError==OE_None ){ 
      sqlite3ReleaseTempRange(pParse, regIdx, pIdx->nColumn+1);

      continue;  /* pIdx is not a UNIQUE index */
    }
    if( overrideError!=OE_Default ){
      onError = overrideError;
    }else if( onError==OE_Default ){
      onError = OE_Abort;
    }
................................................................................
            pParse, pTab, baseCur, regR, 0, pTrigger, OE_Replace
        );
        seenReplace = 1;
        break;
      }
    }
    sqlite3VdbeJumpHere(v, j3);

    sqlite3ReleaseTempReg(pParse, regR);
  }
  
  if( pbMayReplace ){
    *pbMayReplace = seenReplace;
  }
}
................................................................................
  int *aRegIdx,       /* Register used by each index.  0 for unused indices */
  int isUpdate,       /* True for UPDATE, False for INSERT */
  int appendBias,     /* True if this is likely to be an append */
  int useSeekResult   /* True to set the USESEEKRESULT flag on OP_[Idx]Insert */
){
  int i;
  Vdbe *v;
  int nIdx;
  Index *pIdx;
  u8 pik_flags;
  int regData;
  int regRec;

  v = sqlite3GetVdbe(pParse);
  assert( v!=0 );
  assert( pTab->pSelect==0 );  /* This table is not a VIEW */
  for(nIdx=0, pIdx=pTab->pIndex; pIdx; pIdx=pIdx->pNext, nIdx++){}
  for(i=nIdx-1; i>=0; i--){
    if( aRegIdx[i]==0 ) continue;



    sqlite3VdbeAddOp2(v, OP_IdxInsert, baseCur+i+1, aRegIdx[i]);
    if( useSeekResult ){
      sqlite3VdbeChangeP5(v, OPFLAG_USESEEKRESULT);
    }
  }
  regData = regRowid + 1;
  regRec = sqlite3GetTempReg(pParse);
................................................................................
** for index pDest in an insert transfer optimization.  The rules
** for a compatible index:
**
**    *   The index is over the same set of columns
**    *   The same DESC and ASC markings occurs on all columns
**    *   The same onError processing (OE_Abort, OE_Ignore, etc)
**    *   The same collating sequence on each column

*/
static int xferCompatibleIndex(Index *pDest, Index *pSrc){
  int i;
  assert( pDest && pSrc );
  assert( pDest->pTable!=pSrc->pTable );
  if( pDest->nColumn!=pSrc->nColumn ){
    return 0;   /* Different number of columns */
................................................................................
    }
    if( pSrc->aSortOrder[i]!=pDest->aSortOrder[i] ){
      return 0;   /* Different sort orders */
    }
    if( !xferCompatibleCollation(pSrc->azColl[i],pDest->azColl[i]) ){
      return 0;   /* Different collating sequences */
    }



  }

  /* If no test above fails then the indices must be compatible */
  return 1;
}

/*
................................................................................
      if( xferCompatibleIndex(pDestIdx, pSrcIdx) ) break;
    }
    if( pSrcIdx==0 ){
      return 0;    /* pDestIdx has no corresponding index in pSrc */
    }
  }
#ifndef SQLITE_OMIT_CHECK
  if( pDest->pCheck && sqlite3ExprListCompare(pSrc->pCheck, pDest->pCheck) ){
    return 0;   /* Tables have different CHECK constraints.  Ticket #2252 */
  }
#endif
#ifndef SQLITE_OMIT_FOREIGN_KEY
  /* Disallow the transfer optimization if the destination table constains
  ** any foreign key constraints.  This is more restrictive than necessary.
  ** But the main beneficiary of the transfer optimization is the VACUUM 
................................................................................
#endif /* SQLITE_CORE */

#ifndef SQLITE_CORE
  /* This case when the file really is being compiled as a loadable 
  ** extension */
# define SQLITE_EXTENSION_INIT1     const sqlite3_api_routines *sqlite3_api=0;
# define SQLITE_EXTENSION_INIT2(v)  sqlite3_api=v;


#else
  /* This case when the file is being statically linked into the 
  ** application */
# define SQLITE_EXTENSION_INIT1     /*no-op*/
# define SQLITE_EXTENSION_INIT2(v)  (void)v; /* unused parameter */

#endif

#endif /* _SQLITE3EXT_H_ */

/************** End of sqlite3ext.h ******************************************/
/************** Continuing where we left off in loadext.c ********************/
/* #include <string.h> */
................................................................................
      }
    }
    sqlite3_mutex_leave(mutex);
    assert( (rc&0xff)==rc );
    return rc;
  }
}






























/*
** Reset the automatic extension loading mechanism.
*/
SQLITE_API void sqlite3_reset_auto_extension(void){
#ifndef SQLITE_OMIT_AUTOINIT
  if( sqlite3_initialize()==SQLITE_OK )
................................................................................
    memcpy(pI64, &value, sizeof(value));
  }
  sqlite3VdbeAddOp4(v, OP_Int64, 0, mem, 0, (char*)pI64, P4_INT64);
  sqlite3VdbeSetNumCols(v, 1);
  sqlite3VdbeSetColName(v, 0, COLNAME_NAME, zLabel, SQLITE_STATIC);
  sqlite3VdbeAddOp2(v, OP_ResultRow, mem, 1);
}





























#ifndef SQLITE_OMIT_FLAG_PRAGMAS
/*
** Check to see if zRight and zLeft refer to a pragma that queries
** or changes one of the flags in db->flags.  Return 1 if so and 0 if not.
** Also, implement the pragma.
*/
................................................................................
    { "full_column_names",        SQLITE_FullColNames  },
    { "short_column_names",       SQLITE_ShortColNames },
    { "count_changes",            SQLITE_CountRows     },
    { "empty_result_callbacks",   SQLITE_NullCallback  },
    { "legacy_file_format",       SQLITE_LegacyFileFmt },
    { "fullfsync",                SQLITE_FullFSync     },
    { "checkpoint_fullfsync",     SQLITE_CkptFullFSync },

    { "reverse_unordered_selects", SQLITE_ReverseOrder  },

#ifndef SQLITE_OMIT_AUTOMATIC_INDEX
    { "automatic_index",          SQLITE_AutoIndex     },
#endif
#ifdef SQLITE_DEBUG
    { "sql_trace",                SQLITE_SqlTrace      },
    { "vdbe_listing",             SQLITE_VdbeListing   },
    { "vdbe_trace",               SQLITE_VdbeTrace     },
................................................................................
#endif
    /* The following is VERY experimental */
    { "writable_schema",          SQLITE_WriteSchema|SQLITE_RecoveryMode },

    /* TODO: Maybe it shouldn't be possible to change the ReadUncommitted
    ** flag if there are any active statements. */
    { "read_uncommitted",         SQLITE_ReadUncommitted },
    { "recursive_triggers",       SQLITE_RecTriggers },

    /* This flag may only be set if both foreign-key and trigger support
    ** are present in the build.  */
#if !defined(SQLITE_OMIT_FOREIGN_KEY) && !defined(SQLITE_OMIT_TRIGGER)
    { "foreign_keys",             SQLITE_ForeignKeys },

#endif
  };
  int i;
  const struct sPragmaType *p;
  for(i=0, p=aPragma; i<ArraySize(aPragma); i++, p++){
    if( sqlite3StrICmp(zLeft, p->zName)==0 ){
      sqlite3 *db = pParse->db;
................................................................................
            mask &= ~(SQLITE_ForeignKeys);
          }

          if( sqlite3GetBoolean(zRight, 0) ){
            db->flags |= mask;
          }else{
            db->flags &= ~mask;

          }

          /* Many of the flag-pragmas modify the code generated by the SQL 
          ** compiler (eg. count_changes). So add an opcode to expire all
          ** compiled SQL statements after modifying a pragma value.
          */
          sqlite3VdbeAddOp2(v, OP_Expire, 0, 0);
................................................................................
      for(ii=db->nDb-1; ii>=0; ii--){
        if( db->aDb[ii].pBt && (ii==iDb || pId2->n==0) ){
          sqlite3BtreeSetMmapLimit(db->aDb[ii].pBt, sz);
        }
      }
    }
    sz = -1;
    if( sqlite3_file_control(db,zDb,SQLITE_FCNTL_MMAP_SIZE,&sz)==SQLITE_OK ){
#if SQLITE_MAX_MMAP_SIZE==0
      sz = 0;
#endif

      returnSingleInt(pParse, "mmap_size", sz);



    }
  }else

  /*
  **   PRAGMA temp_store
  **   PRAGMA temp_store = "default"|"memory"|"file"
  **
................................................................................
      returnSingleInt(pParse, "synchronous", pDb->safety_level-1);
    }else{
      if( !db->autoCommit ){
        sqlite3ErrorMsg(pParse, 
            "Safety level may not be changed inside a transaction");
      }else{
        pDb->safety_level = getSafetyLevel(zRight,0,1)+1;

      }
    }
  }else
#endif /* SQLITE_OMIT_PAGER_PRAGMAS */

#ifndef SQLITE_OMIT_FLAG_PRAGMAS
  if( flagPragma(pParse, zLeft, zRight) ){
    /* The flagPragma() subroutine also generates any necessary code
    ** there is nothing more to do here */
  }else
#endif /* SQLITE_OMIT_FLAG_PRAGMAS */

#ifndef SQLITE_OMIT_SCHEMA_PRAGMAS
  /*
  **   PRAGMA table_info(<table>)
  **
................................................................................
  }else

#ifndef SQLITE_INTEGRITY_CHECK_ERROR_MAX
# define SQLITE_INTEGRITY_CHECK_ERROR_MAX 100
#endif

#ifndef SQLITE_OMIT_INTEGRITY_CHECK
  /* Pragma "quick_check" is an experimental reduced version of 
  ** integrity_check designed to detect most database corruption
  ** without most of the overhead of a full integrity-check.
  */
  if( sqlite3StrICmp(zLeft, "integrity_check")==0
   || sqlite3StrICmp(zLeft, "quick_check")==0 
  ){
    int i, j, addr, mxErr;
................................................................................
        for(pIdx=pTab->pIndex; pIdx; pIdx=pIdx->pNext){
          sqlite3VdbeAddOp2(v, OP_Integer, pIdx->tnum, 2+cnt);
          cnt++;
        }
      }

      /* Make sure sufficient number of registers have been allocated */
      if( pParse->nMem < cnt+4 ){
        pParse->nMem = cnt+4;
      }

      /* Do the b-tree integrity checks */
      sqlite3VdbeAddOp3(v, OP_IntegrityCk, 2, cnt, 1);
      sqlite3VdbeChangeP5(v, (u8)i);
      addr = sqlite3VdbeAddOp1(v, OP_IsNull, 2);
      sqlite3VdbeAddOp4(v, OP_String8, 0, 3, 0,
         sqlite3MPrintf(db, "*** in database %s ***\n", db->aDb[i].zName),
................................................................................
        Index *pIdx;
        int loopTop;

        if( pTab->pIndex==0 ) continue;
        addr = sqlite3VdbeAddOp1(v, OP_IfPos, 1);  /* Stop if out of errors */
        sqlite3VdbeAddOp2(v, OP_Halt, 0, 0);
        sqlite3VdbeJumpHere(v, addr);

        sqlite3OpenTableAndIndices(pParse, pTab, 1, OP_OpenRead);

        sqlite3VdbeAddOp2(v, OP_Integer, 0, 2);  /* reg(2) will count entries */


        loopTop = sqlite3VdbeAddOp2(v, OP_Rewind, 1, 0);
        sqlite3VdbeAddOp2(v, OP_AddImm, 2, 1);   /* increment entry count */
        for(j=0, pIdx=pTab->pIndex; pIdx; pIdx=pIdx->pNext, j++){
          int jmp2;
          int r1;
          static const VdbeOpList idxErr[] = {
            { OP_AddImm,      1, -1,  0},
            { OP_String8,     0,  3,  0},    /* 1 */
            { OP_Rowid,       1,  4,  0},
            { OP_String8,     0,  5,  0},    /* 3 */
            { OP_String8,     0,  6,  0},    /* 4 */
................................................................................
            { OP_Concat,      4,  3,  3},
            { OP_Concat,      5,  3,  3},
            { OP_Concat,      6,  3,  3},
            { OP_ResultRow,   3,  1,  0},
            { OP_IfPos,       1,  0,  0},    /* 9 */
            { OP_Halt,        0,  0,  0},
          };
          r1 = sqlite3GenerateIndexKey(pParse, pIdx, 1, 3, 0);

          jmp2 = sqlite3VdbeAddOp4Int(v, OP_Found, j+2, 0, r1, pIdx->nColumn+1);
          addr = sqlite3VdbeAddOpList(v, ArraySize(idxErr), idxErr);
          sqlite3VdbeChangeP4(v, addr+1, "rowid ", P4_STATIC);
          sqlite3VdbeChangeP4(v, addr+3, " missing from index ", P4_STATIC);
          sqlite3VdbeChangeP4(v, addr+4, pIdx->zName, P4_TRANSIENT);
          sqlite3VdbeJumpHere(v, addr+9);
          sqlite3VdbeJumpHere(v, jmp2);

        }
        sqlite3VdbeAddOp2(v, OP_Next, 1, loopTop+1);
        sqlite3VdbeJumpHere(v, loopTop);



        for(j=0, pIdx=pTab->pIndex; pIdx; pIdx=pIdx->pNext, j++){
          static const VdbeOpList cntIdx[] = {
             { OP_Integer,      0,  3,  0},
             { OP_Rewind,       0,  0,  0},  /* 1 */
             { OP_AddImm,       3,  1,  0},
             { OP_Next,         0,  0,  0},  /* 3 */
             { OP_Eq,           2,  0,  3},  /* 4 */
             { OP_AddImm,       1, -1,  0},
             { OP_String8,      0,  2,  0},  /* 6 */
             { OP_String8,      0,  3,  0},  /* 7 */
             { OP_Concat,       3,  2,  2},
             { OP_ResultRow,    2,  1,  0},
          };
          addr = sqlite3VdbeAddOp1(v, OP_IfPos, 1);

          sqlite3VdbeAddOp2(v, OP_Halt, 0, 0);
          sqlite3VdbeJumpHere(v, addr);
          addr = sqlite3VdbeAddOpList(v, ArraySize(cntIdx), cntIdx);
          sqlite3VdbeChangeP1(v, addr+1, j+2);
          sqlite3VdbeChangeP2(v, addr+1, addr+4);
          sqlite3VdbeChangeP1(v, addr+3, j+2);
          sqlite3VdbeChangeP2(v, addr+3, addr+2);
          sqlite3VdbeJumpHere(v, addr+4);
          sqlite3VdbeChangeP4(v, addr+6, 
                     "wrong # of entries in index ", P4_STATIC);



          sqlite3VdbeChangeP4(v, addr+7, pIdx->zName, P4_TRANSIENT);


        }

      } 
    }
    addr = sqlite3VdbeAddOpList(v, ArraySize(endCode), endCode);
    sqlite3VdbeChangeP2(v, addr, -mxErr);
    sqlite3VdbeJumpHere(v, addr+1);
    sqlite3VdbeChangeP4(v, addr+2, "ok", P4_STATIC);
  }else
................................................................................
    }

  }else
#endif

#ifdef SQLITE_HAS_CODEC
  if( sqlite3StrICmp(zLeft, "key")==0 && zRight ){
    sqlite3_key(db, zRight, sqlite3Strlen30(zRight));
  }else
  if( sqlite3StrICmp(zLeft, "rekey")==0 && zRight ){
    sqlite3_rekey(db, zRight, sqlite3Strlen30(zRight));
  }else
  if( zRight && (sqlite3StrICmp(zLeft, "hexkey")==0 ||
                 sqlite3StrICmp(zLeft, "hexrekey")==0) ){
    int i, h1, h2;
    char zKey[40];
    for(i=0; (h1 = zRight[i])!=0 && (h2 = zRight[i+1])!=0; i+=2){
      h1 += 9*(1&(h1>>6));
      h2 += 9*(1&(h2>>6));
      zKey[i/2] = (h2 & 0x0f) | ((h1 & 0xf)<<4);
    }
    if( (zLeft[3] & 0xf)==0xb ){
      sqlite3_key(db, zKey, i/2);
    }else{
      sqlite3_rekey(db, zKey, i/2);
    }
  }else
#endif
#if defined(SQLITE_HAS_CODEC) || defined(SQLITE_ENABLE_CEROD)
  if( sqlite3StrICmp(zLeft, "activate_extensions")==0 && zRight ){
#ifdef SQLITE_HAS_CODEC
    if( sqlite3StrNICmp(zRight, "see-", 4)==0 ){
................................................................................
#endif
  }else
#endif

 
  {/* Empty ELSE clause */}

  /*
  ** Reset the safety level, in case the fullfsync flag or synchronous
  ** setting changed.
  */
#ifndef SQLITE_OMIT_PAGER_PRAGMAS
  if( db->autoCommit ){
    sqlite3BtreeSetSafetyLevel(pDb->pBt, pDb->safety_level,
               (db->flags&SQLITE_FullFSync)!=0,
               (db->flags&SQLITE_CkptFullFSync)!=0);
  }
#endif
pragma_out:
  sqlite3DbFree(db, zLeft);
  sqlite3DbFree(db, zRight);
}

#endif /* SQLITE_OMIT_PRAGMA */

................................................................................
      }
    }
  }

  sqlite3VtabUnlockList(db);

  pParse->db = db;
  pParse->nQueryLoop = (double)1;
  if( nBytes>=0 && (nBytes==0 || zSql[nBytes-1]!=0) ){
    char *zSqlCopy;
    int mxLen = db->aLimit[SQLITE_LIMIT_SQL_LENGTH];
    testcase( nBytes==mxLen );
    testcase( nBytes==mxLen+1 );
    if( nBytes>mxLen ){
      sqlite3Error(db, SQLITE_TOOBIG, "statement too long");
................................................................................
      pParse->zTail = &zSql[pParse->zTail-zSqlCopy];
    }else{
      pParse->zTail = &zSql[nBytes];
    }
  }else{
    sqlite3RunParser(pParse, zSql, &zErrMsg);
  }
  assert( 1==(int)pParse->nQueryLoop );

  if( db->mallocFailed ){
    pParse->rc = SQLITE_NOMEM;
  }
  if( pParse->rc==SQLITE_DONE ) pParse->rc = SQLITE_OK;
  if( pParse->checkSchema ){
    schemaIsValid(pParse);
................................................................................
  const char *zTail8 = 0;
  int rc = SQLITE_OK;

  assert( ppStmt );
  *ppStmt = 0;
  if( !sqlite3SafetyCheckOk(db) ){
    return SQLITE_MISUSE_BKPT;






  }
  sqlite3_mutex_enter(db->mutex);
  zSql8 = sqlite3Utf16to8(db, zSql, nBytes, SQLITE_UTF16NATIVE);
  if( zSql8 ){
    rc = sqlite3LockAndPrepare(db, zSql8, -1, saveSqlFlag, 0, ppStmt, &zTail8);
  }

................................................................................
  if( p ){
    clearSelect(db, p);
    sqlite3DbFree(db, p);
  }
}

/*
** Given 1 to 3 identifiers preceeding the JOIN keyword, determine the
** type of join.  Return an integer constant that expresses that type
** in terms of the following bit values:
**
**     JT_INNER
**     JT_CROSS
**     JT_OUTER
**     JT_NATURAL
................................................................................
  ** there is a sorter, in which case the sorter has already limited
  ** the output for us.
  */
  if( pOrderBy==0 && p->iLimit ){
    sqlite3VdbeAddOp3(v, OP_IfZero, p->iLimit, iBreak, -1);
  }
}




















/*
** Given an expression list, generate a KeyInfo structure that records
** the collating sequence for each expression in that expression list.
**
** If the ExprList is an ORDER BY or GROUP BY clause then the resulting
** KeyInfo structure is appropriate for initializing a virtual index to
................................................................................
**
** Space to hold the KeyInfo structure is obtain from malloc.  The calling
** function is responsible for seeing that this structure is eventually
** freed.  Add the KeyInfo structure to the P4 field of an opcode using
** P4_KEYINFO_HANDOFF is the usual way of dealing with this.
*/
static KeyInfo *keyInfoFromExprList(Parse *pParse, ExprList *pList){
  sqlite3 *db = pParse->db;
  int nExpr;
  KeyInfo *pInfo;
  struct ExprList_item *pItem;

  int i;

  nExpr = pList->nExpr;
  pInfo = sqlite3DbMallocZero(db, sizeof(*pInfo) + nExpr*(sizeof(CollSeq*)+1) );
  if( pInfo ){
    pInfo->aSortOrder = (u8*)&pInfo->aColl[nExpr];
    pInfo->nField = (u16)nExpr;
    pInfo->enc = ENC(db);
    pInfo->db = db;
    for(i=0, pItem=pList->a; i<nExpr; i++, pItem++){
      CollSeq *pColl;
      pColl = sqlite3ExprCollSeq(pParse, pItem->pExpr);
      if( !pColl ){
        pColl = db->pDfltColl;
      }
      pInfo->aColl[i] = pColl;
      pInfo->aSortOrder[i] = pItem->sortOrder;
    }
  }
  return pInfo;
}

................................................................................
  int iLimit = 0;
  int iOffset;
  int addr1, n;
  if( p->iLimit ) return;

  /* 
  ** "LIMIT -1" always shows all rows.  There is some
  ** contraversy about what the correct behavior should be.
  ** The current implementation interprets "LIMIT 0" to mean
  ** no rows.
  */
  sqlite3ExprCacheClear(pParse);
  assert( p->pOffset==0 || p->pLimit!=0 );
  if( p->pLimit ){
    p->iLimit = iLimit = ++pParse->nMem;
................................................................................
    v = sqlite3GetVdbe(pParse);
    if( NEVER(v==0) ) return;  /* VDBE should have already been allocated */
    if( sqlite3ExprIsInteger(p->pLimit, &n) ){
      sqlite3VdbeAddOp2(v, OP_Integer, n, iLimit);
      VdbeComment((v, "LIMIT counter"));
      if( n==0 ){
        sqlite3VdbeAddOp2(v, OP_Goto, 0, iBreak);
      }else{
        if( p->nSelectRow > (double)n ) p->nSelectRow = (double)n;
      }
    }else{
      sqlite3ExprCode(pParse, p->pLimit, iLimit);
      sqlite3VdbeAddOp1(v, OP_MustBeInt, iLimit);
      VdbeComment((v, "LIMIT counter"));
      sqlite3VdbeAddOp2(v, OP_IfZero, iLimit, iBreak);
    }
................................................................................
      rc = sqlite3Select(pParse, p, &dest);
      testcase( rc!=SQLITE_OK );
      pDelete = p->pPrior;
      p->pPrior = pPrior;
      p->nSelectRow += pPrior->nSelectRow;
      if( pPrior->pLimit
       && sqlite3ExprIsInteger(pPrior->pLimit, &nLimit)
       && p->nSelectRow > (double)nLimit 
      ){
        p->nSelectRow = (double)nLimit;
      }
      if( addr ){
        sqlite3VdbeJumpHere(v, addr);
      }
      break;
    }
    case TK_EXCEPT:
................................................................................
    KeyInfo *pKeyInfo;            /* Collating sequence for the result set */
    Select *pLoop;                /* For looping through SELECT statements */
    CollSeq **apColl;             /* For looping through pKeyInfo->aColl[] */
    int nCol;                     /* Number of columns in result set */

    assert( p->pRightmost==p );
    nCol = p->pEList->nExpr;
    pKeyInfo = sqlite3DbMallocZero(db,
                       sizeof(*pKeyInfo)+nCol*(sizeof(CollSeq*) + 1));
    if( !pKeyInfo ){
      rc = SQLITE_NOMEM;
      goto multi_select_end;
    }

    pKeyInfo->enc = ENC(db);
    pKeyInfo->nField = (u16)nCol;

    for(i=0, apColl=pKeyInfo->aColl; i<nCol; i++, apColl++){
      *apColl = multiSelectCollSeq(pParse, p, i);
      if( 0==*apColl ){
        *apColl = db->pDfltColl;
      }
    }
    pKeyInfo->aSortOrder = (u8*)apColl;

    for(pLoop=p; pLoop; pLoop=pLoop->pPrior){
      for(i=0; i<2; i++){
        int addr = pLoop->addrOpenEphm[i];
        if( addr<0 ){
          /* If [0] is unused then [1] is also unused.  So we can
          ** always safely abort as soon as the first unused slot is found */
................................................................................
  aPermute = sqlite3DbMallocRaw(db, sizeof(int)*nOrderBy);
  if( aPermute ){
    struct ExprList_item *pItem;
    for(i=0, pItem=pOrderBy->a; i<nOrderBy; i++, pItem++){
      assert( pItem->iOrderByCol>0  && pItem->iOrderByCol<=p->pEList->nExpr );
      aPermute[i] = pItem->iOrderByCol - 1;
    }
    pKeyMerge =
      sqlite3DbMallocRaw(db, sizeof(*pKeyMerge)+nOrderBy*(sizeof(CollSeq*)+1));
    if( pKeyMerge ){
      pKeyMerge->aSortOrder = (u8*)&pKeyMerge->aColl[nOrderBy];
      pKeyMerge->nField = (u16)nOrderBy;
      pKeyMerge->enc = ENC(db);
      for(i=0; i<nOrderBy; i++){
        CollSeq *pColl;
        Expr *pTerm = pOrderBy->a[i].pExpr;
        if( pTerm->flags & EP_Collate ){
          pColl = sqlite3ExprCollSeq(pParse, pTerm);
        }else{
          pColl = multiSelectCollSeq(pParse, p, aPermute[i]);
................................................................................
    regPrev = 0;
  }else{
    int nExpr = p->pEList->nExpr;
    assert( nOrderBy>=nExpr || db->mallocFailed );
    regPrev = pParse->nMem+1;
    pParse->nMem += nExpr+1;
    sqlite3VdbeAddOp2(v, OP_Integer, 0, regPrev);
    pKeyDup = sqlite3DbMallocZero(db,
                  sizeof(*pKeyDup) + nExpr*(sizeof(CollSeq*)+1) );
    if( pKeyDup ){
      pKeyDup->aSortOrder = (u8*)&pKeyDup->aColl[nExpr];
      pKeyDup->nField = (u16)nExpr;
      pKeyDup->enc = ENC(db);
      for(i=0; i<nExpr; i++){
        pKeyDup->aColl[i] = multiSelectCollSeq(pParse, p, i);
        pKeyDup->aSortOrder[i] = 0;
      }
    }
  }
 
................................................................................
** If anything goes wrong, an error message is written into pParse.
** The calling function can detect the problem by looking at pParse->nErr
** and/or pParse->db->mallocFailed.
*/
static void sqlite3SelectExpand(Parse *pParse, Select *pSelect){
  Walker w;
  memset(&w, 0, sizeof(w));
  w.xSelectCallback = convertCompoundSelectToSubquery;
  w.xExprCallback = exprWalkNoop;
  w.pParse = pParse;


  sqlite3WalkSelect(&w, pSelect);

  w.xSelectCallback = selectExpander;
  sqlite3WalkSelect(&w, pSelect);
}


#ifndef SQLITE_OMIT_SUBQUERY
/*
................................................................................
#ifndef SQLITE_OMIT_EXPLAIN
static void explainSimpleCount(
  Parse *pParse,                  /* Parse context */
  Table *pTab,                    /* Table being queried */
  Index *pIdx                     /* Index used to optimize scan, or NULL */
){
  if( pParse->explain==2 ){
    char *zEqp = sqlite3MPrintf(pParse->db, "SCAN TABLE %s %s%s(~%d rows)",
        pTab->zName, 
        pIdx ? "USING COVERING INDEX " : "",
        pIdx ? pIdx->zName : "",
        pTab->nRowEst
    );
    sqlite3VdbeAddOp4(
        pParse->pVdbe, OP_Explain, pParse->iSelectId, 0, 0, zEqp, P4_DYNAMIC
    );
  }
}
#else
................................................................................
      if( pItem->viaCoroutine==0 ){
        sqlite3VdbeAddOp2(v, OP_Gosub, pItem->regReturn, pItem->addrFillSub);
      }
      continue;
    }

    /* Increment Parse.nHeight by the height of the largest expression
    ** tree refered to by this, the parent select. The child select
    ** may contain expression trees of at most
    ** (SQLITE_MAX_EXPR_DEPTH-Parse.nHeight) height. This is a bit
    ** more conservative than necessary, but much easier than enforcing
    ** an exact limit.
    */
    pParse->nHeight += sqlite3SelectExprHeight(p);

................................................................................
  /* If there is both a GROUP BY and an ORDER BY clause and they are
  ** identical, then disable the ORDER BY clause since the GROUP BY
  ** will cause elements to come out in the correct order.  This is
  ** an optimization - the correct answer should result regardless.
  ** Use the SQLITE_GroupByOrder flag with SQLITE_TESTCTRL_OPTIMIZER
  ** to disable this optimization for testing purposes.
  */
  if( sqlite3ExprListCompare(p->pGroupBy, pOrderBy)==0
         && OptimizationEnabled(db, SQLITE_GroupByOrder) ){
    pOrderBy = 0;
  }

  /* If the query is DISTINCT with an ORDER BY but is not an aggregate, and 
  ** if the select-list is the same as the ORDER BY list, then this query
  ** can be rewritten as a GROUP BY. In other words, this:
................................................................................
  **
  ** The second form is preferred as a single index (or temp-table) may be 
  ** used for both the ORDER BY and DISTINCT processing. As originally 
  ** written the query must use a temp-table for at least one of the ORDER 
  ** BY and DISTINCT, and an index or separate temp-table for the other.
  */
  if( (p->selFlags & (SF_Distinct|SF_Aggregate))==SF_Distinct 
   && sqlite3ExprListCompare(pOrderBy, p->pEList)==0
  ){
    p->selFlags &= ~SF_Distinct;
    p->pGroupBy = sqlite3ExprListDup(db, p->pEList, 0);
    pGroupBy = p->pGroupBy;
    pOrderBy = 0;
    /* Notice that even thought SF_Distinct has been cleared from p->selFlags,
    ** the sDistinct.isTnct is still set.  Hence, isTnct represents the
................................................................................
  if( pDest->eDest==SRT_EphemTab ){
    sqlite3VdbeAddOp2(v, OP_OpenEphemeral, pDest->iSDParm, pEList->nExpr);
  }

  /* Set the limiter.
  */
  iEnd = sqlite3VdbeMakeLabel(v);
  p->nSelectRow = (double)LARGEST_INT64;
  computeLimitRegisters(pParse, p, iEnd);
  if( p->iLimit==0 && addrSortIndex>=0 ){
    sqlite3VdbeGetOp(v, addrSortIndex)->opcode = OP_SorterOpen;
    p->selFlags |= SF_UseSorter;
  }

  /* Open a virtual index to use for the distinct set.
................................................................................
    sDistinct.eTnctType = WHERE_DISTINCT_UNORDERED;
  }else{
    sDistinct.eTnctType = WHERE_DISTINCT_NOOP;
  }

  if( !isAgg && pGroupBy==0 ){
    /* No aggregate functions and no GROUP BY clause */
    ExprList *pDist = (sDistinct.isTnct ? p->pEList : 0);

    /* Begin the database scan. */
    pWInfo = sqlite3WhereBegin(pParse, pTabList, pWhere, pOrderBy, pDist, 0,0);

    if( pWInfo==0 ) goto select_end;
    if( pWInfo->nRowOut < p->nSelectRow ) p->nSelectRow = pWInfo->nRowOut;




    if( pWInfo->eDistinct ) sDistinct.eTnctType = pWInfo->eDistinct;
    if( pOrderBy && pWInfo->nOBSat==pOrderBy->nExpr ) pOrderBy = 0;



    /* If sorting index that was created by a prior OP_OpenEphemeral 
    ** instruction ended up not being needed, then change the OP_OpenEphemeral
    ** into an OP_Noop.
    */
    if( addrSortIndex>=0 && pOrderBy==0 ){
      sqlite3VdbeChangeToNoop(v, addrSortIndex);
      p->addrOpenEphm[2] = -1;
    }

    /* Use the standard inner loop. */
    selectInnerLoop(pParse, p, pEList, 0, 0, pOrderBy, &sDistinct, pDest,
                    pWInfo->iContinue, pWInfo->iBreak);


    /* End the database scan loop.
    */
    sqlite3WhereEnd(pWInfo);
  }else{
    /* This case when there exist aggregate functions or a GROUP BY clause
    ** or both */
................................................................................

      for(k=p->pEList->nExpr, pItem=p->pEList->a; k>0; k--, pItem++){
        pItem->iAlias = 0;
      }
      for(k=pGroupBy->nExpr, pItem=pGroupBy->a; k>0; k--, pItem++){
        pItem->iAlias = 0;
      }
      if( p->nSelectRow>(double)100 ) p->nSelectRow = (double)100;
    }else{
      p->nSelectRow = (double)1;
    }

 
    /* Create a label to jump to when we want to abort the query */
    addrEnd = sqlite3VdbeMakeLabel(v);

    /* Convert TK_COLUMN nodes into TK_AGG_COLUMN and make entries in
................................................................................

      /* Begin a loop that will extract all source rows in GROUP BY order.
      ** This might involve two separate loops with an OP_Sort in between, or
      ** it might be a single loop that uses an index to extract information
      ** in the right order to begin with.
      */
      sqlite3VdbeAddOp2(v, OP_Gosub, regReset, addrReset);
      pWInfo = sqlite3WhereBegin(pParse, pTabList, pWhere, pGroupBy, 0, 0, 0);

      if( pWInfo==0 ) goto select_end;
      if( pWInfo->nOBSat==pGroupBy->nExpr ){

        /* The optimizer is able to deliver rows in group by order so
        ** we do not have to sort.  The OP_OpenEphemeral table will be
        ** cancelled later because we still need to use the pKeyInfo
        */
        groupBySort = 0;
      }else{
        /* Rows are coming out in undetermined order.  We have to push
................................................................................
        pWInfo = sqlite3WhereBegin(pParse, pTabList, pWhere, pMinMax,0,flag,0);
        if( pWInfo==0 ){
          sqlite3ExprListDelete(db, pDel);
          goto select_end;
        }
        updateAccumulator(pParse, &sAggInfo);
        assert( pMinMax==0 || pMinMax->nExpr==1 );
        if( pWInfo->nOBSat>0 ){
          sqlite3VdbeAddOp2(v, OP_Goto, 0, pWInfo->iBreak);
          VdbeComment((v, "%s() by index",
                (flag==WHERE_ORDERBY_MIN?"min":"max")));
        }
        sqlite3WhereEnd(pWInfo);
        finalizeAggFunctions(pParse, &sAggInfo);
      }

................................................................................
    sqlite3VdbeChangeP5(v, (u8)bRecursive);
  }
}

/*
** This is called to code the required FOR EACH ROW triggers for an operation
** on table pTab. The operation to code triggers for (INSERT, UPDATE or DELETE)
** is given by the op paramater. The tr_tm parameter determines whether the
** BEFORE or AFTER triggers are coded. If the operation is an UPDATE, then
** parameter pChanges is passed the list of columns being modified.
**
** If there are no triggers that fire at the specified time for the specified
** operation on pTab, this function is a no-op.
**
** The reg argument is the address of the first in an array of registers 
................................................................................
  for(nIdx=0, pIdx=pTab->pIndex; pIdx; pIdx=pIdx->pNext, nIdx++){}
  if( nIdx>0 ){
    aRegIdx = sqlite3DbMallocRaw(db, sizeof(Index*) * nIdx );
    if( aRegIdx==0 ) goto update_cleanup;
  }
  for(j=0, pIdx=pTab->pIndex; pIdx; pIdx=pIdx->pNext, j++){
    int reg;
    if( hasFK || chngRowid ){
      reg = ++pParse->nMem;
    }else{
      reg = 0;
      for(i=0; i<pIdx->nColumn; i++){
        if( aXRef[pIdx->aiColumn[i]]>=0 ){
          reg = ++pParse->nMem;
          break;
................................................................................
  /* Begin the database scan
  */
  sqlite3VdbeAddOp3(v, OP_Null, 0, regRowSet, regOldRowid);
  pWInfo = sqlite3WhereBegin(
      pParse, pTabList, pWhere, 0, 0, WHERE_ONEPASS_DESIRED, 0
  );
  if( pWInfo==0 ) goto update_cleanup;
  okOnePass = pWInfo->okOnePass;

  /* Remember the rowid of every item to be updated.
  */
  sqlite3VdbeAddOp2(v, OP_Rowid, iCur, regOldRowid);
  if( !okOnePass ){
    sqlite3VdbeAddOp2(v, OP_RowSetAdd, regRowSet, regOldRowid);
  }
................................................................................
  int nRes;               /* Bytes of reserved space at the end of each page */
  int nDb;                /* Number of attached databases */

  if( !db->autoCommit ){
    sqlite3SetString(pzErrMsg, db, "cannot VACUUM from within a transaction");
    return SQLITE_ERROR;
  }
  if( db->activeVdbeCnt>1 ){
    sqlite3SetString(pzErrMsg, db,"cannot VACUUM - SQL statements in progress");
    return SQLITE_ERROR;
  }

  /* Save the current value of the database flags so that it can be 
  ** restored before returning. Then set the writable-schema flag, and
  ** disable CHECK and foreign key constraints.  */
................................................................................
}

/*
** Invoke the xSync method of all virtual tables in the sqlite3.aVTrans
** array. Return the error code for the first error that occurs, or
** SQLITE_OK if all xSync operations are successful.
**
** Set *pzErrmsg to point to a buffer that should be released using 
** sqlite3DbFree() containing an error message, if one is available.
*/
SQLITE_PRIVATE int sqlite3VtabSync(sqlite3 *db, char **pzErrmsg){
  int i;
  int rc = SQLITE_OK;
  VTable **aVTrans = db->aVTrans;

  db->aVTrans = 0;
  for(i=0; rc==SQLITE_OK && i<db->nVTrans; i++){
    int (*x)(sqlite3_vtab *);
    sqlite3_vtab *pVtab = aVTrans[i]->pVtab;
    if( pVtab && (x = pVtab->pModule->xSync)!=0 ){
      rc = x(pVtab);
      sqlite3DbFree(db, *pzErrmsg);
      *pzErrmsg = sqlite3DbStrDup(db, pVtab->zErrMsg);
      sqlite3_free(pVtab->zErrMsg);
    }
  }
  db->aVTrans = aVTrans;
  return rc;
}

/*
................................................................................
** Trace output macros
*/
#if defined(SQLITE_TEST) || defined(SQLITE_DEBUG)
/***/ int sqlite3WhereTrace = 0;
#endif
#if defined(SQLITE_DEBUG) \
    && (defined(SQLITE_TEST) || defined(SQLITE_ENABLE_WHERETRACE))

# define WHERETRACE(X)  if(sqlite3WhereTrace) sqlite3DebugPrintf X
#else
# define WHERETRACE(X)
#endif

/* Forward reference
*/
typedef struct WhereClause WhereClause;
typedef struct WhereMaskSet WhereMaskSet;
typedef struct WhereOrInfo WhereOrInfo;
typedef struct WhereAndInfo WhereAndInfo;

typedef struct WhereCost WhereCost;







































































































































































/*
** The query generator uses an array of instances of this structure to
** help it analyze the subexpressions of the WHERE clause.  Each WHERE
** clause subexpression is separated from the others by AND operators,
** usually, or sometimes subexpressions separated by OR.
**
................................................................................
** use of a bitmask encoding for the operator allows us to search
** quickly for terms that match any of several different operators.
**
** A WhereTerm might also be two or more subterms connected by OR:
**
**         (t1.X <op> <expr>) OR (t1.Y <op> <expr>) OR ....
**
** In this second case, wtFlag as the TERM_ORINFO set and eOperator==WO_OR
** and the WhereTerm.u.pOrInfo field points to auxiliary information that
** is collected about the
**
** If a term in the WHERE clause does not match either of the two previous
** categories, then eOperator==0.  The WhereTerm.pExpr field is still set
** to the original subexpression content and wtFlags is set up appropriately
** but no other fields in the WhereTerm object are meaningful.
**
** When eOperator!=0, prereqRight and prereqAll record sets of cursor numbers,
................................................................................
** bits in the Bitmask.  So, in the example above, the cursor numbers
** would be mapped into integers 0 through 7.
**
** The number of terms in a join is limited by the number of bits
** in prereqRight and prereqAll.  The default is 64 bits, hence SQLite
** is only able to process joins with 64 or fewer tables.
*/
typedef struct WhereTerm WhereTerm;
struct WhereTerm {
  Expr *pExpr;            /* Pointer to the subexpression that is this term */
  int iParent;            /* Disable pWC->a[iParent] when this term disabled */
  int leftCursor;         /* Cursor number of X in "X <op> <expr>" */
  union {
    int leftColumn;         /* Column number of X in "X <op> <expr>" */
    WhereOrInfo *pOrInfo;   /* Extra information if (eOperator & WO_OR)!=0 */
................................................................................
#define TERM_OR_OK      0x40   /* Used during OR-clause processing */
#ifdef SQLITE_ENABLE_STAT3
#  define TERM_VNULL    0x80   /* Manufactured x>NULL or x<=NULL term */
#else
#  define TERM_VNULL    0x00   /* Disabled if not using stat3 */
#endif

















/*
** An instance of the following structure holds all information about a
** WHERE clause.  Mostly this is a container for one or more WhereTerms.
**
** Explanation of pOuter:  For a WHERE clause of the form
**
**           a AND ((b AND c) OR (d AND e)) AND f
**
** There are separate WhereClause objects for the whole clause and for
** the subclauses "(b AND c)" and "(d AND e)".  The pOuter field of the
** subclauses points to the WhereClause object for the whole clause.
*/
struct WhereClause {
  Parse *pParse;           /* The parser context */
  WhereMaskSet *pMaskSet;  /* Mapping of table cursor numbers to bitmasks */
  WhereClause *pOuter;     /* Outer conjunction */
  u8 op;                   /* Split operator.  TK_AND or TK_OR */
  u16 wctrlFlags;          /* Might include WHERE_AND_ONLY */
  int nTerm;               /* Number of terms */
  int nSlot;               /* Number of entries in a[] */
  WhereTerm *a;            /* Each a[] describes a term of the WHERE cluase */
#if defined(SQLITE_SMALL_STACK)
  WhereTerm aStatic[1];    /* Initial static space for a[] */
#else
  WhereTerm aStatic[8];    /* Initial static space for a[] */
................................................................................
*/
struct WhereMaskSet {
  int n;                        /* Number of assigned cursor values */
  int ix[BMS];                  /* Cursor assigned to each bit */
};

/*
** A WhereCost object records a lookup strategy and the estimated
** cost of pursuing that strategy.
*/
struct WhereCost {
  WherePlan plan;    /* The lookup strategy */
  double rCost;      /* Overall cost of pursuing this search strategy */
  Bitmask used;      /* Bitmask of cursors used by this plan */


};

/*

































** Bitmasks for the operators that indices are able to exploit.  An

** OR-ed combination of these values can be used when searching for
** terms in the where clause.

*/
#define WO_IN     0x001
#define WO_EQ     0x002
#define WO_LT     (WO_EQ<<(TK_LT-TK_EQ))
#define WO_LE     (WO_EQ<<(TK_LE-TK_EQ))
#define WO_GT     (WO_EQ<<(TK_GT-TK_EQ))
#define WO_GE     (WO_EQ<<(TK_GE-TK_EQ))
................................................................................
#define WO_EQUIV  0x400       /* Of the form A==B, both columns */
#define WO_NOOP   0x800       /* This term does not restrict search space */

#define WO_ALL    0xfff       /* Mask of all possible WO_* values */
#define WO_SINGLE 0x0ff       /* Mask of all non-compound WO_* values */

/*
** Value for wsFlags returned by bestIndex() and stored in
** WhereLevel.wsFlags.  These flags determine which search
** strategies are appropriate.
**
** The least significant 12 bits is reserved as a mask for WO_ values above.
** The WhereLevel.wsFlags field is usually set to WO_IN|WO_EQ|WO_ISNULL.
** But if the table is the right table of a left join, WhereLevel.wsFlags
** is set to WO_IN|WO_EQ.  The WhereLevel.wsFlags field can then be used as
** the "op" parameter to findTerm when we are resolving equality constraints.
** ISNULL constraints will then not be used on the right table of a left
** join.  Tickets #2177 and #2189.
*/
#define WHERE_ROWID_EQ     0x00001000  /* rowid=EXPR or rowid IN (...) */
#define WHERE_ROWID_RANGE  0x00002000  /* rowid<EXPR and/or rowid>EXPR */
#define WHERE_COLUMN_EQ    0x00010000  /* x=EXPR or x IN (...) or x IS NULL */
#define WHERE_COLUMN_RANGE 0x00020000  /* x<EXPR and/or x>EXPR */
#define WHERE_COLUMN_IN    0x00040000  /* x IN (...) */
#define WHERE_COLUMN_NULL  0x00080000  /* x IS NULL */
#define WHERE_INDEXED      0x000f0000  /* Anything that uses an index */
#define WHERE_NOT_FULLSCAN 0x100f3000  /* Does not do a full table scan */
#define WHERE_IN_ABLE      0x080f1000  /* Able to support an IN operator */
#define WHERE_TOP_LIMIT    0x00100000  /* x<EXPR or x<=EXPR constraint */
#define WHERE_BTM_LIMIT    0x00200000  /* x>EXPR or x>=EXPR constraint */
#define WHERE_BOTH_LIMIT   0x00300000  /* Both x>EXPR and x<EXPR */
#define WHERE_IDX_ONLY     0x00400000  /* Use index only - omit table */
#define WHERE_ORDERED      0x00800000  /* Output will appear in correct order */
#define WHERE_REVERSE      0x01000000  /* Scan in reverse order */
#define WHERE_UNIQUE       0x02000000  /* Selects no more than one row */
#define WHERE_ALL_UNIQUE   0x04000000  /* This and all prior have one row */
#define WHERE_OB_UNIQUE    0x00004000  /* Values in ORDER BY columns are 
                                       ** different for every output row */
#define WHERE_VIRTUALTABLE 0x08000000  /* Use virtual-table processing */
#define WHERE_MULTI_OR     0x10000000  /* OR using multiple indices */
#define WHERE_TEMP_INDEX   0x20000000  /* Uses an ephemeral index */
#define WHERE_DISTINCT     0x40000000  /* Correct order for DISTINCT */
#define WHERE_COVER_SCAN   0x80000000  /* Full scan of a covering index */

/*
** This module contains many separate subroutines that work together to
** find the best indices to use for accessing a particular table in a query.
** An instance of the following structure holds context information about the
** index search so that it can be more easily passed between the various
** routines.
*/
typedef struct WhereBestIdx WhereBestIdx;
struct WhereBestIdx {
  Parse *pParse;                  /* Parser context */
  WhereClause *pWC;               /* The WHERE clause */
  struct SrcList_item *pSrc;      /* The FROM clause term to search */
  Bitmask notReady;               /* Mask of cursors not available */
  Bitmask notValid;               /* Cursors not available for any purpose */
  ExprList *pOrderBy;             /* The ORDER BY clause */
  ExprList *pDistinct;            /* The select-list if query is DISTINCT */
  sqlite3_index_info **ppIdxInfo; /* Index information passed to xBestIndex */
  int i, n;                       /* Which loop is being coded; # of loops */
  WhereLevel *aLevel;             /* Info about outer loops */
  WhereCost cost;                 /* Lowest cost query plan */
};

/*
** Return TRUE if the probe cost is less than the baseline cost
*/
static int compareCost(const WhereCost *pProbe, const WhereCost *pBaseline){
  if( pProbe->rCost<pBaseline->rCost ) return 1;
  if( pProbe->rCost>pBaseline->rCost ) return 0;
  if( pProbe->plan.nOBSat>pBaseline->plan.nOBSat ) return 1;
  if( pProbe->plan.nRow<pBaseline->plan.nRow ) return 1;
  return 0;
}

/*
** Initialize a preallocated WhereClause structure.
*/
static void whereClauseInit(
  WhereClause *pWC,        /* The WhereClause to be initialized */
  Parse *pParse,           /* The parsing context */
  WhereMaskSet *pMaskSet,  /* Mapping from table cursor numbers to bitmasks */
  u16 wctrlFlags           /* Might include WHERE_AND_ONLY */
){
  pWC->pParse = pParse;
  pWC->pMaskSet = pMaskSet;



























































  pWC->pOuter = 0;
  pWC->nTerm = 0;
  pWC->nSlot = ArraySize(pWC->aStatic);
  pWC->a = pWC->aStatic;
  pWC->wctrlFlags = wctrlFlags;
}

/* Forward reference */
static void whereClauseClear(WhereClause*);

/*
** Deallocate all memory associated with a WhereOrInfo object.
................................................................................
/*
** Deallocate a WhereClause structure.  The WhereClause structure
** itself is not freed.  This routine is the inverse of whereClauseInit().
*/
static void whereClauseClear(WhereClause *pWC){
  int i;
  WhereTerm *a;
  sqlite3 *db = pWC->pParse->db;
  for(i=pWC->nTerm-1, a=pWC->a; i>=0; i--, a++){
    if( a->wtFlags & TERM_DYNAMIC ){
      sqlite3ExprDelete(db, a->pExpr);
    }
    if( a->wtFlags & TERM_ORINFO ){
      whereOrInfoDelete(db, a->u.pOrInfo);
    }else if( a->wtFlags & TERM_ANDINFO ){
................................................................................
** WhereTerms.  All pointers to WhereTerms should be invalidated after
** calling this routine.  Such pointers may be reinitialized by referencing
** the pWC->a[] array.
*/
static int whereClauseInsert(WhereClause *pWC, Expr *p, u8 wtFlags){
  WhereTerm *pTerm;
  int idx;
  testcase( wtFlags & TERM_VIRTUAL );  /* EV: R-00211-15100 */
  if( pWC->nTerm>=pWC->nSlot ){
    WhereTerm *pOld = pWC->a;
    sqlite3 *db = pWC->pParse->db;
    pWC->a = sqlite3DbMallocRaw(db, sizeof(pWC->a[0])*pWC->nSlot*2 );
    if( pWC->a==0 ){
      if( wtFlags & TERM_DYNAMIC ){
        sqlite3ExprDelete(db, p);
      }
      pWC->a = pOld;
      return 0;
................................................................................
** The original WHERE clause in pExpr is unaltered.  All this routine
** does is make slot[] entries point to substructure within pExpr.
**
** In the previous sentence and in the diagram, "slot[]" refers to
** the WhereClause.a[] array.  The slot[] array grows as needed to contain
** all terms of the WHERE clause.
*/
static void whereSplit(WhereClause *pWC, Expr *pExpr, int op){
  pWC->op = (u8)op;
  if( pExpr==0 ) return;
  if( pExpr->op!=op ){
    whereClauseInsert(pWC, pExpr, 0);
  }else{
    whereSplit(pWC, pExpr->pLeft, op);
    whereSplit(pWC, pExpr->pRight, op);
  }
}

/*
** Initialize an expression mask set (a WhereMaskSet object)
*/
#define initMaskSet(P)  memset(P, 0, sizeof(*P))

/*
** Return the bitmask for the given cursor number.  Return 0 if
** iCursor is not in the set.
*/
static Bitmask getMask(WhereMaskSet *pMaskSet, int iCursor){
  int i;
  assert( pMaskSet->n<=(int)sizeof(Bitmask)*8 );
  for(i=0; i<pMaskSet->n; i++){
    if( pMaskSet->ix[i]==iCursor ){
      return ((Bitmask)1)<<i;
    }
  }
  return 0;
}

/*
** Create a new mask for cursor iCursor.
................................................................................
*/
static void createMask(WhereMaskSet *pMaskSet, int iCursor){
  assert( pMaskSet->n < ArraySize(pMaskSet->ix) );
  pMaskSet->ix[pMaskSet->n++] = iCursor;
}

/*
** This routine walks (recursively) an expression tree and generates
** a bitmask indicating which tables are used in that expression
** tree.
**
** In order for this routine to work, the calling function must have
** previously invoked sqlite3ResolveExprNames() on the expression.  See
** the header comment on that routine for additional information.
** The sqlite3ResolveExprNames() routines looks for column names and
** sets their opcodes to TK_COLUMN and their Expr.iTable fields to
** the VDBE cursor number of the table.  This routine just has to
** translate the cursor numbers into bitmask values and OR all
** the bitmasks together.
*/
static Bitmask exprListTableUsage(WhereMaskSet*, ExprList*);
static Bitmask exprSelectTableUsage(WhereMaskSet*, Select*);
static Bitmask exprTableUsage(WhereMaskSet *pMaskSet, Expr *p){
  Bitmask mask = 0;
  if( p==0 ) return 0;
  if( p->op==TK_COLUMN ){
................................................................................
  }
  return mask;
}

/*
** Return TRUE if the given operator is one of the operators that is
** allowed for an indexable WHERE clause term.  The allowed operators are
** "=", "<", ">", "<=", ">=", and "IN".
**
** IMPLEMENTATION-OF: R-59926-26393 To be usable by an index a term must be
** of one of the following forms: column = expression column > expression
** column >= expression column < expression column <= expression
** expression = column expression > column expression >= column
** expression < column expression <= column column IN
** (expression-list) column IN (subquery) column IS NULL
*/
static int allowedOp(int op){
  assert( TK_GT>TK_EQ && TK_GT<TK_GE );
  assert( TK_LT>TK_EQ && TK_LT<TK_GE );
  assert( TK_LE>TK_EQ && TK_LE<TK_GE );
  assert( TK_GE==TK_EQ+4 );
  return op==TK_IN || (op>=TK_EQ && op<=TK_GE) || op==TK_ISNULL;
................................................................................
#define SWAP(TYPE,A,B) {TYPE t=A; A=B; B=t;}

/*
** Commute a comparison operator.  Expressions of the form "X op Y"
** are converted into "Y op X".
**
** If left/right precedence rules come into play when determining the
** collating
** side of the comparison, it remains associated with the same side after
** the commutation. So "Y collate NOCASE op X" becomes 
** "X op Y". This is because any collation sequence on
** the left hand side of a comparison overrides any collation sequence 
** attached to the right. For the same reason the EP_Collate flag
** is not commuted.
*/
static void exprCommute(Parse *pParse, Expr *pExpr){
  u16 expRight = (pExpr->pRight->flags & EP_Collate);
  u16 expLeft = (pExpr->pLeft->flags & EP_Collate);
................................................................................
  assert( op!=TK_EQ || c==WO_EQ );
  assert( op!=TK_LT || c==WO_LT );
  assert( op!=TK_LE || c==WO_LE );
  assert( op!=TK_GT || c==WO_GT );
  assert( op!=TK_GE || c==WO_GE );
  return c;
}





























































































































/*
** Search for a term in the WHERE clause that is of the form "X <op> <expr>"
** where X is a reference to the iColumn of table iCur and <op> is one of
** the WO_xx operator codes specified by the op parameter.
** Return a pointer to the term.  Return 0 if not found.
**
................................................................................
  WhereClause *pWC,     /* The WHERE clause to be searched */
  int iCur,             /* Cursor number of LHS */
  int iColumn,          /* Column number of LHS */
  Bitmask notReady,     /* RHS must not overlap with this mask */
  u32 op,               /* Mask of WO_xx values describing operator */
  Index *pIdx           /* Must be compatible with this index, if not NULL */
){
  WhereTerm *pTerm;            /* Term being examined as possible result */
  WhereTerm *pResult = 0;      /* The answer to return */
  WhereClause *pWCOrig = pWC;  /* Original pWC value */
  int j, k;                    /* Loop counters */
  Expr *pX;                /* Pointer to an expression */
  Parse *pParse;           /* Parsing context */
  int iOrigCol = iColumn;  /* Original value of iColumn */
  int nEquiv = 2;          /* Number of entires in aEquiv[] */
  int iEquiv = 2;          /* Number of entries of aEquiv[] processed so far */
  int aEquiv[22];          /* iCur,iColumn and up to 10 other equivalents */

  assert( iCur>=0 );
  aEquiv[0] = iCur;
  aEquiv[1] = iColumn;
  for(;;){
    for(pWC=pWCOrig; pWC; pWC=pWC->pOuter){
      for(pTerm=pWC->a, k=pWC->nTerm; k; k--, pTerm++){
        if( pTerm->leftCursor==iCur
          && pTerm->u.leftColumn==iColumn
        ){


          if( (pTerm->prereqRight & notReady)==0
           && (pTerm->eOperator & op & WO_ALL)!=0
          ){
            if( iOrigCol>=0 && pIdx && (pTerm->eOperator & WO_ISNULL)==0 ){
              CollSeq *pColl;
              char idxaff;


      
              pX = pTerm->pExpr;
              pParse = pWC->pParse;
              idxaff = pIdx->pTable->aCol[iOrigCol].affinity;
              if( !sqlite3IndexAffinityOk(pX, idxaff) ){
                continue;
              }
      
              /* Figure out the collation sequence required from an index for
              ** it to be useful for optimising expression pX. Store this
              ** value in variable pColl.
              */
              assert(pX->pLeft);
              pColl = sqlite3BinaryCompareCollSeq(pParse,pX->pLeft,pX->pRight);
              if( pColl==0 ) pColl = pParse->db->pDfltColl;
      
              for(j=0; pIdx->aiColumn[j]!=iOrigCol; j++){
                if( NEVER(j>=pIdx->nColumn) ) return 0;
              }
              if( sqlite3StrICmp(pColl->zName, pIdx->azColl[j]) ){
                continue;
              }
            }
            if( pTerm->prereqRight==0 && (pTerm->eOperator&WO_EQ)!=0 ){
              pResult = pTerm;
              goto findTerm_success;
            }else if( pResult==0 ){
              pResult = pTerm;
            }

          }
          if( (pTerm->eOperator & WO_EQUIV)!=0
           && nEquiv<ArraySize(aEquiv)
          ){
            pX = sqlite3ExprSkipCollate(pTerm->pExpr->pRight);
            assert( pX->op==TK_COLUMN );
            for(j=0; j<nEquiv; j+=2){
              if( aEquiv[j]==pX->iTable && aEquiv[j+1]==pX->iColumn ) break;
            }
            if( j==nEquiv ){
              aEquiv[j] = pX->iTable;
              aEquiv[j+1] = pX->iColumn;
              nEquiv += 2;
            }
          }
        }
      }
    }
    if( iEquiv>=nEquiv ) break;
    iCur = aEquiv[iEquiv++];
    iColumn = aEquiv[iEquiv++];
  }
findTerm_success:
  return pResult;
}

/* Forward reference */
static void exprAnalyze(SrcList*, WhereClause*, int);

/*
** Call exprAnalyze on all terms in a WHERE clause.  
**
**
*/
static void exprAnalyzeAll(
  SrcList *pTabList,       /* the FROM clause */
  WhereClause *pWC         /* the WHERE clause to be analyzed */
){
  int i;
  for(i=pWC->nTerm-1; i>=0; i--){
................................................................................
  op = pRight->op;
  if( op==TK_REGISTER ){
    op = pRight->op2;
  }
  if( op==TK_VARIABLE ){
    Vdbe *pReprepare = pParse->pReprepare;
    int iCol = pRight->iColumn;
    pVal = sqlite3VdbeGetValue(pReprepare, iCol, SQLITE_AFF_NONE);
    if( pVal && sqlite3_value_type(pVal)==SQLITE_TEXT ){
      z = (char *)sqlite3_value_text(pVal);
    }
    sqlite3VdbeSetVarmask(pParse->pVdbe, iCol);
    assert( pRight->op==TK_VARIABLE || pRight->op==TK_REGISTER );
  }else if( op==TK_STRING ){
    z = pRight->u.zToken;
................................................................................
** subsubterms at least one of which is indexable.  Indexable AND 
** subterms have their eOperator set to WO_AND and they have
** u.pAndInfo set to a dynamically allocated WhereAndTerm object.
**
** From another point of view, "indexable" means that the subterm could
** potentially be used with an index if an appropriate index exists.
** This analysis does not consider whether or not the index exists; that
** is something the bestIndex() routine will determine.  This analysis
** only looks at whether subterms appropriate for indexing exist.
**
** All examples A through E above all satisfy case 2.  But if a term
** also statisfies case 1 (such as B) we know that the optimizer will
** always prefer case 1, so in that case we pretend that case 2 is not
** satisfied.
**
** It might be the case that multiple tables are indexable.  For example,
** (E) above is indexable on tables P, Q, and R.
**
................................................................................
** zero.  This term is not useful for search.
*/
static void exprAnalyzeOrTerm(
  SrcList *pSrc,            /* the FROM clause */
  WhereClause *pWC,         /* the complete WHERE clause */
  int idxTerm               /* Index of the OR-term to be analyzed */
){
  Parse *pParse = pWC->pParse;            /* Parser context */

  sqlite3 *db = pParse->db;               /* Database connection */
  WhereTerm *pTerm = &pWC->a[idxTerm];    /* The term to be analyzed */
  Expr *pExpr = pTerm->pExpr;             /* The expression of the term */
  WhereMaskSet *pMaskSet = pWC->pMaskSet; /* Table use masks */
  int i;                                  /* Loop counters */
  WhereClause *pOrWc;       /* Breakup of pTerm into subterms */
  WhereTerm *pOrTerm;       /* A Sub-term within the pOrWc */
  WhereOrInfo *pOrInfo;     /* Additional information associated with pTerm */
  Bitmask chngToIN;         /* Tables that might satisfy case 1 */
  Bitmask indexable;        /* Tables that are indexable, satisfying case 2 */

................................................................................
  */
  assert( (pTerm->wtFlags & (TERM_DYNAMIC|TERM_ORINFO|TERM_ANDINFO))==0 );
  assert( pExpr->op==TK_OR );
  pTerm->u.pOrInfo = pOrInfo = sqlite3DbMallocZero(db, sizeof(*pOrInfo));
  if( pOrInfo==0 ) return;
  pTerm->wtFlags |= TERM_ORINFO;
  pOrWc = &pOrInfo->wc;
  whereClauseInit(pOrWc, pWC->pParse, pMaskSet, pWC->wctrlFlags);
  whereSplit(pOrWc, pExpr, TK_OR);
  exprAnalyzeAll(pSrc, pOrWc);
  if( db->mallocFailed ) return;
  assert( pOrWc->nTerm>=2 );

  /*
  ** Compute the set of tables that might satisfy cases 1 or 2.
................................................................................
        WhereTerm *pAndTerm;
        int j;
        Bitmask b = 0;
        pOrTerm->u.pAndInfo = pAndInfo;
        pOrTerm->wtFlags |= TERM_ANDINFO;
        pOrTerm->eOperator = WO_AND;
        pAndWC = &pAndInfo->wc;
        whereClauseInit(pAndWC, pWC->pParse, pMaskSet, pWC->wctrlFlags);
        whereSplit(pAndWC, pOrTerm->pExpr, TK_AND);
        exprAnalyzeAll(pSrc, pAndWC);
        pAndWC->pOuter = pWC;
        testcase( db->mallocFailed );
        if( !db->mallocFailed ){
          for(j=0, pAndTerm=pAndWC->a; j<pAndWC->nTerm; j++, pAndTerm++){
            assert( pAndTerm->pExpr );
            if( allowedOp(pAndTerm->pExpr->op) ){
              b |= getMask(pMaskSet, pAndTerm->leftCursor);
            }
          }
        }
        indexable &= b;
      }
    }else if( pOrTerm->wtFlags & TERM_COPIED ){
      /* Skip this term for now.  We revisit it when we process the
      ** corresponding TERM_VIRTUAL term */
    }else{
      Bitmask b;
      b = getMask(pMaskSet, pOrTerm->leftCursor);
      if( pOrTerm->wtFlags & TERM_VIRTUAL ){
        WhereTerm *pOther = &pOrWc->a[pOrTerm->iParent];
        b |= getMask(pMaskSet, pOther->leftCursor);
      }
      indexable &= b;
      if( (pOrTerm->eOperator & WO_EQ)==0 ){
        chngToIN = 0;
      }else{
        chngToIN &= b;
      }
................................................................................
        pOrTerm->wtFlags &= ~TERM_OR_OK;
        if( pOrTerm->leftCursor==iCursor ){
          /* This is the 2-bit case and we are on the second iteration and
          ** current term is from the first iteration.  So skip this term. */
          assert( j==1 );
          continue;
        }
        if( (chngToIN & getMask(pMaskSet, pOrTerm->leftCursor))==0 ){
          /* This term must be of the form t1.a==t2.b where t2 is in the
          ** chngToIN set but t1 is not.  This term will be either preceeded
          ** or follwed by an inverted copy (t2.b==t1.a).  Skip this term 
          ** and use its inversion. */
          testcase( pOrTerm->wtFlags & TERM_COPIED );
          testcase( pOrTerm->wtFlags & TERM_VIRTUAL );
          assert( pOrTerm->wtFlags & (TERM_COPIED|TERM_VIRTUAL) );
................................................................................
        break;
      }
      if( i<0 ){
        /* No candidate table+column was found.  This can only occur
        ** on the second iteration */
        assert( j==1 );
        assert( IsPowerOfTwo(chngToIN) );
        assert( chngToIN==getMask(pMaskSet, iCursor) );
        break;
      }
      testcase( j==1 );

      /* We have found a candidate table and column.  Check to see if that
      ** table and column is common to every term in the OR clause */
      okToChngToIN = 1;
................................................................................
        }
      }
    }

    /* At this point, okToChngToIN is true if original pTerm satisfies
    ** case 1.  In that case, construct a new virtual term that is 
    ** pTerm converted into an IN operator.
    **
    ** EV: R-00211-15100
    */
    if( okToChngToIN ){
      Expr *pDup;            /* A transient duplicate expression */
      ExprList *pList = 0;   /* The RHS of the IN operator */
      Expr *pLeft = 0;       /* The LHS of the IN operator */
      Expr *pNew;            /* The complete IN operator */

      for(i=pOrWc->nTerm-1, pOrTerm=pOrWc->a; i>=0; i--, pOrTerm++){
        if( (pOrTerm->wtFlags & TERM_OR_OK)==0 ) continue;
        assert( pOrTerm->eOperator & WO_EQ );
        assert( pOrTerm->leftCursor==iCursor );
        assert( pOrTerm->u.leftColumn==iColumn );
        pDup = sqlite3ExprDup(db, pOrTerm->pExpr->pRight, 0);
        pList = sqlite3ExprListAppend(pWC->pParse, pList, pDup);
        pLeft = pOrTerm->pExpr->pLeft;
      }
      assert( pLeft!=0 );
      pDup = sqlite3ExprDup(db, pLeft, 0);
      pNew = sqlite3PExpr(pParse, TK_IN, pDup, 0, 0);
      if( pNew ){
        int idxNew;
................................................................................
** and the copy has idxParent set to the index of the original term.
*/
static void exprAnalyze(
  SrcList *pSrc,            /* the FROM clause */
  WhereClause *pWC,         /* the WHERE clause */
  int idxTerm               /* Index of the term to be analyzed */
){

  WhereTerm *pTerm;                /* The term to be analyzed */
  WhereMaskSet *pMaskSet;          /* Set of table index masks */
  Expr *pExpr;                     /* The expression to be analyzed */
  Bitmask prereqLeft;              /* Prerequesites of the pExpr->pLeft */
  Bitmask prereqAll;               /* Prerequesites of pExpr */
  Bitmask extraRight = 0;          /* Extra dependencies on LEFT JOIN */
  Expr *pStr1 = 0;                 /* RHS of LIKE/GLOB operator */
  int isComplete = 0;              /* RHS of LIKE/GLOB ends with wildcard */
  int noCase = 0;                  /* LIKE/GLOB distinguishes case */
  int op;                          /* Top-level operator.  pExpr->op */
  Parse *pParse = pWC->pParse;     /* Parsing context */
  sqlite3 *db = pParse->db;        /* Database connection */

  if( db->mallocFailed ){
    return;
  }
  pTerm = &pWC->a[idxTerm];
  pMaskSet = pWC->pMaskSet;
  pExpr = pTerm->pExpr;
  assert( pExpr->op!=TK_AS && pExpr->op!=TK_COLLATE );
  prereqLeft = exprTableUsage(pMaskSet, pExpr->pLeft);
  op = pExpr->op;
  if( op==TK_IN ){
    assert( pExpr->pRight==0 );
    if( ExprHasProperty(pExpr, EP_xIsSelect) ){
................................................................................
      if( noCase ){
        /* The point is to increment the last character before the first
        ** wildcard.  But if we increment '@', that will push it into the
        ** alphabetic range where case conversions will mess up the 
        ** inequality.  To avoid this, make sure to also run the full
        ** LIKE on all candidate expressions by clearing the isComplete flag
        */
        if( c=='A'-1 ) isComplete = 0;   /* EV: R-64339-08207 */


        c = sqlite3UpperToLower[c];
      }
      *pC = c + 1;
    }
    sCollSeqName.z = noCase ? "NOCASE" : "BINARY";
    sCollSeqName.n = 6;
    pNewExpr1 = sqlite3ExprDup(db, pLeft, 0);
................................................................................
  ** TERM_VNULL tag will suppress the not-null check at the beginning
  ** of the loop.  Without the TERM_VNULL flag, the not-null check at
  ** the start of the loop will prevent any results from being returned.
  */
  if( pExpr->op==TK_NOTNULL
   && pExpr->pLeft->op==TK_COLUMN
   && pExpr->pLeft->iColumn>=0

  ){
    Expr *pNewExpr;
    Expr *pLeft = pExpr->pLeft;
    int idxNew;
    WhereTerm *pNewTerm;

    pNewExpr = sqlite3PExpr(pParse, TK_GT,
................................................................................
  /* Prevent ON clause terms of a LEFT JOIN from being used to drive
  ** an index for tables to the left of the join.
  */
  pTerm->prereqRight |= extraRight;
}

/*
** This function searches the expression list passed as the second argument
** for an expression of type TK_COLUMN that refers to the same column and
** uses the same collation sequence as the iCol'th column of index pIdx.
** Argument iBase is the cursor number used for the table that pIdx refers
** to.
**
** If such an expression is found, its index in pList->a[] is returned. If
** no expression is found, -1 is returned.
*/
static int findIndexCol(
  Parse *pParse,                  /* Parse context */
  ExprList *pList,                /* Expression list to search */
................................................................................
        return i;
      }
    }
  }

  return -1;
}

/*
** This routine determines if pIdx can be used to assist in processing a
** DISTINCT qualifier. In other words, it tests whether or not using this
** index for the outer loop guarantees that rows with equal values for
** all expressions in the pDistinct list are delivered grouped together.
**
** For example, the query 
**
**   SELECT DISTINCT a, b, c FROM tbl WHERE a = ?
**
** can benefit from any index on columns "b" and "c".
*/
static int isDistinctIndex(
  Parse *pParse,                  /* Parsing context */
  WhereClause *pWC,               /* The WHERE clause */
  Index *pIdx,                    /* The index being considered */
  int base,                       /* Cursor number for the table pIdx is on */
  ExprList *pDistinct,            /* The DISTINCT expressions */
  int nEqCol                      /* Number of index columns with == */
){
  Bitmask mask = 0;               /* Mask of unaccounted for pDistinct exprs */
  int i;                          /* Iterator variable */

  assert( pDistinct!=0 );
  if( pIdx->zName==0 || pDistinct->nExpr>=BMS ) return 0;
  testcase( pDistinct->nExpr==BMS-1 );

  /* Loop through all the expressions in the distinct list. If any of them
  ** are not simple column references, return early. Otherwise, test if the
  ** WHERE clause contains a "col=X" clause. If it does, the expression
  ** can be ignored. If it does not, and the column does not belong to the
  ** same table as index pIdx, return early. Finally, if there is no
  ** matching "col=X" expression and the column is on the same table as pIdx,
  ** set the corresponding bit in variable mask.
  */
  for(i=0; i<pDistinct->nExpr; i++){
    WhereTerm *pTerm;
    Expr *p = sqlite3ExprSkipCollate(pDistinct->a[i].pExpr);
    if( p->op!=TK_COLUMN ) return 0;
    pTerm = findTerm(pWC, p->iTable, p->iColumn, ~(Bitmask)0, WO_EQ, 0);
    if( pTerm ){
      Expr *pX = pTerm->pExpr;
      CollSeq *p1 = sqlite3BinaryCompareCollSeq(pParse, pX->pLeft, pX->pRight);
      CollSeq *p2 = sqlite3ExprCollSeq(pParse, p);
      if( p1==p2 ) continue;
    }
    if( p->iTable!=base ) return 0;
    mask |= (((Bitmask)1) << i);
  }

  for(i=nEqCol; mask && i<pIdx->nColumn; i++){
    int iExpr = findIndexCol(pParse, pDistinct, base, pIdx, i);
    if( iExpr<0 ) break;
    mask &= ~(((Bitmask)1) << iExpr);
  }

  return (mask==0);
}


/*
** Return true if the DISTINCT expression-list passed as the third argument
** is redundant. A DISTINCT list is redundant if the database contains a
** UNIQUE index that guarantees that the result of the query will be distinct
** anyway.

*/
static int isDistinctRedundant(
  Parse *pParse,
  SrcList *pTabList,
  WhereClause *pWC,
  ExprList *pDistinct
){
  Table *pTab;
  Index *pIdx;
  int i;                          
  int iBase;

  /* If there is more than one table or sub-select in the FROM clause of
................................................................................
      return 1;
    }
  }

  return 0;
}

/*
** Prepare a crude estimate of the logarithm of the input value.
** The results need not be exact.  This is only used for estimating
** the total cost of performing operations with O(logN) or O(NlogN)
** complexity.  Because N is just a guess, it is no great tragedy if
** logN is a little off.
*/

static double estLog(double N){
  double logN = 1;
  double x = 10;
  while( N>x ){
    logN += 1;
    x *= 10;




  }










































  return logN;
}


/*








** Two routines for printing the content of an sqlite3_index_info
** structure.  Used for testing and debugging only.  If neither
** SQLITE_TEST or SQLITE_DEBUG are defined, then these routines
** are no-ops.
*/
#if !defined(SQLITE_OMIT_VIRTUALTABLE) && defined(SQLITE_DEBUG)
static void TRACE_IDX_INPUTS(sqlite3_index_info *p){
  int i;
  if( !sqlite3WhereTrace ) return;
  for(i=0; i<p->nConstraint; i++){
    sqlite3DebugPrintf("  constraint[%d]: col=%d termid=%d op=%d usabled=%d\n",
       i,
       p->aConstraint[i].iColumn,
................................................................................
  sqlite3DebugPrintf("  estimatedCost=%g\n", p->estimatedCost);
}
#else
#define TRACE_IDX_INPUTS(A)
#define TRACE_IDX_OUTPUTS(A)
#endif

/* 
** Required because bestIndex() is called by bestOrClauseIndex() 
*/
static void bestIndex(WhereBestIdx*);

/*
** This routine attempts to find an scanning strategy that can be used 
** to optimize an 'OR' expression that is part of a WHERE clause. 
**
** The table associated with FROM clause term pSrc may be either a
** regular B-Tree table or a virtual table.
*/
static void bestOrClauseIndex(WhereBestIdx *p){
#ifndef SQLITE_OMIT_OR_OPTIMIZATION
  WhereClause *pWC = p->pWC;           /* The WHERE clause */
  struct SrcList_item *pSrc = p->pSrc; /* The FROM clause term to search */
  const int iCur = pSrc->iCursor;      /* The cursor of the table  */
  const Bitmask maskSrc = getMask(pWC->pMaskSet, iCur);  /* Bitmask for pSrc */
  WhereTerm * const pWCEnd = &pWC->a[pWC->nTerm];        /* End of pWC->a[] */
  WhereTerm *pTerm;                    /* A single term of the WHERE clause */

  /* The OR-clause optimization is disallowed if the INDEXED BY or
  ** NOT INDEXED clauses are used or if the WHERE_AND_ONLY bit is set. */
  if( pSrc->notIndexed || pSrc->pIndex!=0 ){
    return;
  }
  if( pWC->wctrlFlags & WHERE_AND_ONLY ){
    return;
  }

  /* Search the WHERE clause terms for a usable WO_OR term. */
  for(pTerm=pWC->a; pTerm<pWCEnd; pTerm++){
    if( (pTerm->eOperator & WO_OR)!=0
     && ((pTerm->prereqAll & ~maskSrc) & p->notReady)==0
     && (pTerm->u.pOrInfo->indexable & maskSrc)!=0 
    ){
      WhereClause * const pOrWC = &pTerm->u.pOrInfo->wc;
      WhereTerm * const pOrWCEnd = &pOrWC->a[pOrWC->nTerm];
      WhereTerm *pOrTerm;
      int flags = WHERE_MULTI_OR;
      double rTotal = 0;
      double nRow = 0;
      Bitmask used = 0;
      WhereBestIdx sBOI;

      sBOI = *p;
      sBOI.pOrderBy = 0;
      sBOI.pDistinct = 0;
      sBOI.ppIdxInfo = 0;
      for(pOrTerm=pOrWC->a; pOrTerm<pOrWCEnd; pOrTerm++){
        WHERETRACE(("... Multi-index OR testing for term %d of %d....\n", 
          (pOrTerm - pOrWC->a), (pTerm - pWC->a)
        ));
        if( (pOrTerm->eOperator& WO_AND)!=0 ){
          sBOI.pWC = &pOrTerm->u.pAndInfo->wc;
          bestIndex(&sBOI);
        }else if( pOrTerm->leftCursor==iCur ){
          WhereClause tempWC;
          tempWC.pParse = pWC->pParse;
          tempWC.pMaskSet = pWC->pMaskSet;
          tempWC.pOuter = pWC;
          tempWC.op = TK_AND;
          tempWC.a = pOrTerm;
          tempWC.wctrlFlags = 0;
          tempWC.nTerm = 1;
          sBOI.pWC = &tempWC;
          bestIndex(&sBOI);
        }else{
          continue;
        }
        rTotal += sBOI.cost.rCost;
        nRow += sBOI.cost.plan.nRow;
        used |= sBOI.cost.used;
        if( rTotal>=p->cost.rCost ) break;
      }

      /* If there is an ORDER BY clause, increase the scan cost to account 
      ** for the cost of the sort. */
      if( p->pOrderBy!=0 ){
        WHERETRACE(("... sorting increases OR cost %.9g to %.9g\n",
                    rTotal, rTotal+nRow*estLog(nRow)));
        rTotal += nRow*estLog(nRow);
      }

      /* If the cost of scanning using this OR term for optimization is
      ** less than the current cost stored in pCost, replace the contents
      ** of pCost. */
      WHERETRACE(("... multi-index OR cost=%.9g nrow=%.9g\n", rTotal, nRow));
      if( rTotal<p->cost.rCost ){
        p->cost.rCost = rTotal;
        p->cost.used = used;
        p->cost.plan.nRow = nRow;
        p->cost.plan.nOBSat = p->i ? p->aLevel[p->i-1].plan.nOBSat : 0;
        p->cost.plan.wsFlags = flags;
        p->cost.plan.u.pTerm = pTerm;
      }
    }
  }
#endif /* SQLITE_OMIT_OR_OPTIMIZATION */
}

#ifndef SQLITE_OMIT_AUTOMATIC_INDEX
/*
** Return TRUE if the WHERE clause term pTerm is of a form where it
** could be used with an index to access pSrc, assuming an appropriate
** index existed.
*/
static int termCanDriveIndex(
................................................................................
  struct SrcList_item *pSrc,     /* Table we are trying to access */
  Bitmask notReady               /* Tables in outer loops of the join */
){
  char aff;
  if( pTerm->leftCursor!=pSrc->iCursor ) return 0;
  if( (pTerm->eOperator & WO_EQ)==0 ) return 0;
  if( (pTerm->prereqRight & notReady)!=0 ) return 0;

  aff = pSrc->pTab->aCol[pTerm->u.leftColumn].affinity;
  if( !sqlite3IndexAffinityOk(pTerm->pExpr, aff) ) return 0;
  return 1;
}
#endif

#ifndef SQLITE_OMIT_AUTOMATIC_INDEX
/*
** If the query plan for pSrc specified in pCost is a full table scan
** and indexing is allows (if there is no NOT INDEXED clause) and it
** possible to construct a transient index that would perform better
** than a full table scan even when the cost of constructing the index
** is taken into account, then alter the query plan to use the
** transient index.
*/
static void bestAutomaticIndex(WhereBestIdx *p){
  Parse *pParse = p->pParse;            /* The parsing context */
  WhereClause *pWC = p->pWC;            /* The WHERE clause */
  struct SrcList_item *pSrc = p->pSrc;  /* The FROM clause term to search */
  double nTableRow;                     /* Rows in the input table */
  double logN;                          /* log(nTableRow) */
  double costTempIdx;         /* per-query cost of the transient index */
  WhereTerm *pTerm;           /* A single term of the WHERE clause */
  WhereTerm *pWCEnd;          /* End of pWC->a[] */
  Table *pTable;              /* Table tht might be indexed */

  if( pParse->nQueryLoop<=(double)1 ){
    /* There is no point in building an automatic index for a single scan */
    return;
  }
  if( (pParse->db->flags & SQLITE_AutoIndex)==0 ){
    /* Automatic indices are disabled at run-time */
    return;
  }
  if( (p->cost.plan.wsFlags & WHERE_NOT_FULLSCAN)!=0
   && (p->cost.plan.wsFlags & WHERE_COVER_SCAN)==0
  ){
    /* We already have some kind of index in use for this query. */
    return;
  }
  if( pSrc->viaCoroutine ){
    /* Cannot index a co-routine */
    return;
  }
  if( pSrc->notIndexed ){
    /* The NOT INDEXED clause appears in the SQL. */
    return;
  }
  if( pSrc->isCorrelated ){
    /* The source is a correlated sub-query. No point in indexing it. */
    return;
  }

  assert( pParse->nQueryLoop >= (double)1 );
  pTable = pSrc->pTab;
  nTableRow = pTable->nRowEst;
  logN = estLog(nTableRow);
  costTempIdx = 2*logN*(nTableRow/pParse->nQueryLoop + 1);
  if( costTempIdx>=p->cost.rCost ){
    /* The cost of creating the transient table would be greater than
    ** doing the full table scan */
    return;
  }

  /* Search for any equality comparison term */
  pWCEnd = &pWC->a[pWC->nTerm];
  for(pTerm=pWC->a; pTerm<pWCEnd; pTerm++){
    if( termCanDriveIndex(pTerm, pSrc, p->notReady) ){
      WHERETRACE(("auto-index reduces cost from %.1f to %.1f\n",
                    p->cost.rCost, costTempIdx));
      p->cost.rCost = costTempIdx;
      p->cost.plan.nRow = logN + 1;
      p->cost.plan.wsFlags = WHERE_TEMP_INDEX;
      p->cost.used = pTerm->prereqRight;
      break;
    }
  }
}
#else
# define bestAutomaticIndex(A)  /* no-op */
#endif /* SQLITE_OMIT_AUTOMATIC_INDEX */


#ifndef SQLITE_OMIT_AUTOMATIC_INDEX
/*
** Generate code to construct the Index object for an automatic index
** and to set up the WhereLevel object pLevel so that the code generator
** makes use of the automatic index.
*/
................................................................................
  KeyInfo *pKeyinfo;          /* Key information for the index */   
  int addrTop;                /* Top of the index fill loop */
  int regRecord;              /* Register holding an index record */
  int n;                      /* Column counter */
  int i;                      /* Loop counter */
  int mxBitCol;               /* Maximum column in pSrc->colUsed */
  CollSeq *pColl;             /* Collating sequence to on a column */

  Bitmask idxCols;            /* Bitmap of columns used for indexing */
  Bitmask extraCols;          /* Bitmap of additional columns */


  /* Generate code to skip over the creation and initialization of the
  ** transient index on 2nd and subsequent iterations of the loop. */
  v = pParse->pVdbe;
  assert( v!=0 );
  addrInit = sqlite3CodeOnce(pParse);

  /* Count the number of columns that will be added to the index
  ** and used to match WHERE clause constraints */
  nColumn = 0;
  pTable = pSrc->pTab;
  pWCEnd = &pWC->a[pWC->nTerm];

  idxCols = 0;
  for(pTerm=pWC->a; pTerm<pWCEnd; pTerm++){
    if( termCanDriveIndex(pTerm, pSrc, notReady) ){
      int iCol = pTerm->u.leftColumn;
      Bitmask cMask = iCol>=BMS ? ((Bitmask)1)<<(BMS-1) : ((Bitmask)1)<<iCol;
      testcase( iCol==BMS );
      testcase( iCol==BMS-1 );






      if( (idxCols & cMask)==0 ){

        nColumn++;
        idxCols |= cMask;
      }
    }
  }
  assert( nColumn>0 );
  pLevel->plan.nEq = nColumn;



  /* Count the number of additional columns needed to create a
  ** covering index.  A "covering index" is an index that contains all
  ** columns that are needed by the query.  With a covering index, the
  ** original table never needs to be accessed.  Automatic indices must
  ** be a covering index because the index will not be updated if the
  ** original table changes and the index and table cannot both be used
  ** if they go out of sync.
  */
  extraCols = pSrc->colUsed & (~idxCols | (((Bitmask)1)<<(BMS-1)));
  mxBitCol = (pTable->nCol >= BMS-1) ? BMS-1 : pTable->nCol;
  testcase( pTable->nCol==BMS-1 );
  testcase( pTable->nCol==BMS-2 );
  for(i=0; i<mxBitCol; i++){
    if( extraCols & (((Bitmask)1)<<i) ) nColumn++;
  }
  if( pSrc->colUsed & (((Bitmask)1)<<(BMS-1)) ){
    nColumn += pTable->nCol - BMS + 1;
  }
  pLevel->plan.wsFlags |= WHERE_COLUMN_EQ | WHERE_IDX_ONLY | WO_EQ;

  /* Construct the Index object to describe this index */
  nByte = sizeof(Index);
  nByte += nColumn*sizeof(int);     /* Index.aiColumn */
  nByte += nColumn*sizeof(char*);   /* Index.azColl */
  nByte += nColumn;                 /* Index.aSortOrder */
  pIdx = sqlite3DbMallocZero(pParse->db, nByte);
  if( pIdx==0 ) return;
  pLevel->plan.u.pIdx = pIdx;
  pIdx->azColl = (char**)&pIdx[1];
  pIdx->aiColumn = (int*)&pIdx->azColl[nColumn];
  pIdx->aSortOrder = (u8*)&pIdx->aiColumn[nColumn];
  pIdx->zName = "auto-index";
  pIdx->nColumn = nColumn;
  pIdx->pTable = pTable;
  n = 0;
  idxCols = 0;
  for(pTerm=pWC->a; pTerm<pWCEnd; pTerm++){
    if( termCanDriveIndex(pTerm, pSrc, notReady) ){
      int iCol = pTerm->u.leftColumn;
      Bitmask cMask = iCol>=BMS ? ((Bitmask)1)<<(BMS-1) : ((Bitmask)1)<<iCol;


      if( (idxCols & cMask)==0 ){
        Expr *pX = pTerm->pExpr;
        idxCols |= cMask;
        pIdx->aiColumn[n] = pTerm->u.leftColumn;
        pColl = sqlite3BinaryCompareCollSeq(pParse, pX->pLeft, pX->pRight);
        pIdx->azColl[n] = ALWAYS(pColl) ? pColl->zName : "BINARY";
        n++;
      }
    }
  }
  assert( (u32)n==pLevel->plan.nEq );

  /* Add additional columns needed to make the automatic index into
  ** a covering index */
  for(i=0; i<mxBitCol; i++){
    if( extraCols & (((Bitmask)1)<<i) ){
      pIdx->aiColumn[n] = i;
      pIdx->azColl[n] = "BINARY";
      n++;
    }
  }
  if( pSrc->colUsed & (((Bitmask)1)<<(BMS-1)) ){
    for(i=BMS-1; i<pTable->nCol; i++){
      pIdx->aiColumn[n] = i;
      pIdx->azColl[n] = "BINARY";
      n++;
    }
  }
  assert( n==nColumn );

  /* Create the automatic index */
  pKeyinfo = sqlite3IndexKeyinfo(pParse, pIdx);
  assert( pLevel->iIdxCur>=0 );

  sqlite3VdbeAddOp4(v, OP_OpenAutoindex, pLevel->iIdxCur, nColumn+1, 0,
                    (char*)pKeyinfo, P4_KEYINFO_HANDOFF);
  VdbeComment((v, "for %s", pTable->zName));

  /* Fill the automatic index with content */
  addrTop = sqlite3VdbeAddOp1(v, OP_Rewind, pLevel->iTabCur);
  regRecord = sqlite3GetTempReg(pParse);
  sqlite3GenerateIndexKey(pParse, pIdx, pLevel->iTabCur, regRecord, 1);
  sqlite3VdbeAddOp2(v, OP_IdxInsert, pLevel->iIdxCur, regRecord);
  sqlite3VdbeChangeP5(v, OPFLAG_USESEEKRESULT);
  sqlite3VdbeAddOp2(v, OP_Next, pLevel->iTabCur, addrTop+1);
  sqlite3VdbeChangeP5(v, SQLITE_STMTSTATUS_AUTOINDEX);
  sqlite3VdbeJumpHere(v, addrTop);
  sqlite3ReleaseTempReg(pParse, regRecord);
  
................................................................................

#ifndef SQLITE_OMIT_VIRTUALTABLE
/*
** Allocate and populate an sqlite3_index_info structure. It is the 
** responsibility of the caller to eventually release the structure
** by passing the pointer returned by this function to sqlite3_free().
*/
static sqlite3_index_info *allocateIndexInfo(WhereBestIdx *p){
  Parse *pParse = p->pParse; 
  WhereClause *pWC = p->pWC;
  struct SrcList_item *pSrc = p->pSrc;
  ExprList *pOrderBy = p->pOrderBy;

  int i, j;
  int nTerm;
  struct sqlite3_index_constraint *pIdxCons;
  struct sqlite3_index_orderby *pIdxOrderBy;
  struct sqlite3_index_constraint_usage *pUsage;
  WhereTerm *pTerm;
  int nOrderBy;
  sqlite3_index_info *pIdxInfo;

  WHERETRACE(("Recomputing index info for %s...\n", pSrc->pTab->zName));

  /* Count the number of possible WHERE clause constraints referring
  ** to this virtual table */
  for(i=nTerm=0, pTerm=pWC->a; i<pWC->nTerm; i++, pTerm++){
    if( pTerm->leftCursor != pSrc->iCursor ) continue;
    assert( IsPowerOfTwo(pTerm->eOperator & ~WO_EQUIV) );
    testcase( pTerm->eOperator & WO_IN );
    testcase( pTerm->eOperator & WO_ISNULL );
................................................................................
  /* Allocate the sqlite3_index_info structure
  */
  pIdxInfo = sqlite3DbMallocZero(pParse->db, sizeof(*pIdxInfo)
                           + (sizeof(*pIdxCons) + sizeof(*pUsage))*nTerm
                           + sizeof(*pIdxOrderBy)*nOrderBy );
  if( pIdxInfo==0 ){
    sqlite3ErrorMsg(pParse, "out of memory");
    /* (double)0 In case of SQLITE_OMIT_FLOATING_POINT... */
    return 0;
  }

  /* Initialize the structure.  The sqlite3_index_info structure contains
  ** many fields that are declared "const" to prevent xBestIndex from
  ** changing them.  We have to do some funky casting in order to
  ** initialize those fields.
................................................................................

  return pIdxInfo;
}

/*
** The table object reference passed as the second argument to this function
** must represent a virtual table. This function invokes the xBestIndex()
** method of the virtual table with the sqlite3_index_info pointer passed
** as the argument.
**
** If an error occurs, pParse is populated with an error message and a
** non-zero value is returned. Otherwise, 0 is returned and the output
** part of the sqlite3_index_info structure is left populated.
**
** Whether or not an error is returned, it is the responsibility of the
** caller to eventually free p->idxStr if p->needToFreeIdxStr indicates
................................................................................
** that this is required.
*/
static int vtabBestIndex(Parse *pParse, Table *pTab, sqlite3_index_info *p){
  sqlite3_vtab *pVtab = sqlite3GetVTable(pParse->db, pTab)->pVtab;
  int i;
  int rc;

  WHERETRACE(("xBestIndex for %s\n", pTab->zName));
  TRACE_IDX_INPUTS(p);
  rc = pVtab->pModule->xBestIndex(pVtab, p);
  TRACE_IDX_OUTPUTS(p);

  if( rc!=SQLITE_OK ){
    if( rc==SQLITE_NOMEM ){
      pParse->db->mallocFailed = 1;
................................................................................
      sqlite3ErrorMsg(pParse, 
          "table %s: xBestIndex returned an invalid plan", pTab->zName);
    }
  }

  return pParse->nErr;
}



/*
** Compute the best index for a virtual table.
**
** The best index is computed by the xBestIndex method of the virtual
** table module.  This routine is really just a wrapper that sets up
** the sqlite3_index_info structure that is used to communicate with
** xBestIndex.
**
** In a join, this routine might be called multiple times for the
** same virtual table.  The sqlite3_index_info structure is created
** and initialized on the first invocation and reused on all subsequent
** invocations.  The sqlite3_index_info structure is also used when
** code is generated to access the virtual table.  The whereInfoDelete() 
** routine takes care of freeing the sqlite3_index_info structure after
** everybody has finished with it.
*/
static void bestVirtualIndex(WhereBestIdx *p){
  Parse *pParse = p->pParse;      /* The parsing context */
  WhereClause *pWC = p->pWC;      /* The WHERE clause */
  struct SrcList_item *pSrc = p->pSrc; /* The FROM clause term to search */
  Table *pTab = pSrc->pTab;
  sqlite3_index_info *pIdxInfo;
  struct sqlite3_index_constraint *pIdxCons;
  struct sqlite3_index_constraint_usage *pUsage;
  WhereTerm *pTerm;
  int i, j;
  int nOrderBy;
  int bAllowIN;                   /* Allow IN optimizations */
  double rCost;

  /* Make sure wsFlags is initialized to some sane value. Otherwise, if the 
  ** malloc in allocateIndexInfo() fails and this function returns leaving
  ** wsFlags in an uninitialized state, the caller may behave unpredictably.
  */
  memset(&p->cost, 0, sizeof(p->cost));
  p->cost.plan.wsFlags = WHERE_VIRTUALTABLE;

  /* If the sqlite3_index_info structure has not been previously
  ** allocated and initialized, then allocate and initialize it now.
  */
  pIdxInfo = *p->ppIdxInfo;
  if( pIdxInfo==0 ){
    *p->ppIdxInfo = pIdxInfo = allocateIndexInfo(p);
  }
  if( pIdxInfo==0 ){
    return;
  }

  /* At this point, the sqlite3_index_info structure that pIdxInfo points
  ** to will have been initialized, either during the current invocation or
  ** during some prior invocation.  Now we just have to customize the
  ** details of pIdxInfo for the current invocation and pass it to
  ** xBestIndex.
  */

  /* The module name must be defined. Also, by this point there must
  ** be a pointer to an sqlite3_vtab structure. Otherwise
  ** sqlite3ViewGetColumnNames() would have picked up the error. 
  */
  assert( pTab->azModuleArg && pTab->azModuleArg[0] );
  assert( sqlite3GetVTable(pParse->db, pTab) );

  /* Try once or twice.  On the first attempt, allow IN optimizations.
  ** If an IN optimization is accepted by the virtual table xBestIndex
  ** method, but the  pInfo->aConstrainUsage.omit flag is not set, then
  ** the query will not work because it might allow duplicate rows in
  ** output.  In that case, run the xBestIndex method a second time
  ** without the IN constraints.  Usually this loop only runs once.
  ** The loop will exit using a "break" statement.
  */
  for(bAllowIN=1; 1; bAllowIN--){
    assert( bAllowIN==0 || bAllowIN==1 );

    /* Set the aConstraint[].usable fields and initialize all 
    ** output variables to zero.
    **
    ** aConstraint[].usable is true for constraints where the right-hand
    ** side contains only references to tables to the left of the current
    ** table.  In other words, if the constraint is of the form:
    **
    **           column = expr
    **
    ** and we are evaluating a join, then the constraint on column is 
    ** only valid if all tables referenced in expr occur to the left
    ** of the table containing column.
    **
    ** The aConstraints[] array contains entries for all constraints
    ** on the current table.  That way we only have to compute it once
    ** even though we might try to pick the best index multiple times.
    ** For each attempt at picking an index, the order of tables in the
    ** join might be different so we have to recompute the usable flag
    ** each time.
    */
    pIdxCons = *(struct sqlite3_index_constraint**)&pIdxInfo->aConstraint;
    pUsage = pIdxInfo->aConstraintUsage;
    for(i=0; i<pIdxInfo->nConstraint; i++, pIdxCons++){
      j = pIdxCons->iTermOffset;
      pTerm = &pWC->a[j];
      if( (pTerm->prereqRight&p->notReady)==0
       && (bAllowIN || (pTerm->eOperator & WO_IN)==0)
      ){
        pIdxCons->usable = 1;
      }else{
        pIdxCons->usable = 0;
      }
    }
    memset(pUsage, 0, sizeof(pUsage[0])*pIdxInfo->nConstraint);
    if( pIdxInfo->needToFreeIdxStr ){
      sqlite3_free(pIdxInfo->idxStr);
    }
    pIdxInfo->idxStr = 0;
    pIdxInfo->idxNum = 0;
    pIdxInfo->needToFreeIdxStr = 0;
    pIdxInfo->orderByConsumed = 0;
    /* ((double)2) In case of SQLITE_OMIT_FLOATING_POINT... */
    pIdxInfo->estimatedCost = SQLITE_BIG_DBL / ((double)2);
    nOrderBy = pIdxInfo->nOrderBy;
    if( !p->pOrderBy ){
      pIdxInfo->nOrderBy = 0;
    }
  
    if( vtabBestIndex(pParse, pTab, pIdxInfo) ){
      return;
    }
  
    pIdxCons = *(struct sqlite3_index_constraint**)&pIdxInfo->aConstraint;
    for(i=0; i<pIdxInfo->nConstraint; i++, pIdxCons++){
      if( pUsage[i].argvIndex>0 ){
        j = pIdxCons->iTermOffset;
        pTerm = &pWC->a[j];
        p->cost.used |= pTerm->prereqRight;
        if( (pTerm->eOperator & WO_IN)!=0 ){
          if( pUsage[i].omit==0 ){
            /* Do not attempt to use an IN constraint if the virtual table
            ** says that the equivalent EQ constraint cannot be safely omitted.
            ** If we do attempt to use such a constraint, some rows might be
            ** repeated in the output. */
            break;
          }
          /* A virtual table that is constrained by an IN clause may not
          ** consume the ORDER BY clause because (1) the order of IN terms
          ** is not necessarily related to the order of output terms and
          ** (2) Multiple outputs from a single IN value will not merge
          ** together.  */
          pIdxInfo->orderByConsumed = 0;
        }
      }
    }
    if( i>=pIdxInfo->nConstraint ) break;
  }

  /* The orderByConsumed signal is only valid if all outer loops collectively
  ** generate just a single row of output.
  */
  if( pIdxInfo->orderByConsumed ){
    for(i=0; i<p->i; i++){
      if( (p->aLevel[i].plan.wsFlags & WHERE_UNIQUE)==0 ){
        pIdxInfo->orderByConsumed = 0;
      }
    }
  }
  
  /* If there is an ORDER BY clause, and the selected virtual table index
  ** does not satisfy it, increase the cost of the scan accordingly. This
  ** matches the processing for non-virtual tables in bestBtreeIndex().
  */
  rCost = pIdxInfo->estimatedCost;
  if( p->pOrderBy && pIdxInfo->orderByConsumed==0 ){
    rCost += estLog(rCost)*rCost;
  }

  /* The cost is not allowed to be larger than SQLITE_BIG_DBL (the
  ** inital value of lowestCost in this loop. If it is, then the
  ** (cost<lowestCost) test below will never be true.
  ** 
  ** Use "(double)2" instead of "2.0" in case OMIT_FLOATING_POINT 
  ** is defined.
  */
  if( (SQLITE_BIG_DBL/((double)2))<rCost ){
    p->cost.rCost = (SQLITE_BIG_DBL/((double)2));
  }else{
    p->cost.rCost = rCost;
  }
  p->cost.plan.u.pVtabIdx = pIdxInfo;
  if( pIdxInfo->orderByConsumed ){
    p->cost.plan.wsFlags |= WHERE_ORDERED;
    p->cost.plan.nOBSat = nOrderBy;
  }else{
    p->cost.plan.nOBSat = p->i ? p->aLevel[p->i-1].plan.nOBSat : 0;
  }
  p->cost.plan.nEq = 0;
  pIdxInfo->nOrderBy = nOrderBy;

  /* Try to find a more efficient access pattern by using multiple indexes
  ** to optimize an OR expression within the WHERE clause. 
  */
  bestOrClauseIndex(p);
}
#endif /* SQLITE_OMIT_VIRTUALTABLE */

#ifdef SQLITE_ENABLE_STAT3
/*
** Estimate the location of a particular key among all keys in an
** index.  Store the results in aStat as follows:
**
**    aStat[0]      Est. number of rows less than pVal
................................................................................
      const u8 *z;
      if( eType==SQLITE_BLOB ){
        z = (const u8 *)sqlite3_value_blob(pVal);
        pColl = db->pDfltColl;
        assert( pColl->enc==SQLITE_UTF8 );
      }else{
        pColl = sqlite3GetCollSeq(pParse, SQLITE_UTF8, 0, *pIdx->azColl);
        if( pColl==0 ){


          return SQLITE_ERROR;
        }
        z = (const u8 *)sqlite3ValueText(pVal, pColl->enc);
        if( !z ){
          return SQLITE_NOMEM;
        }
        assert( z && pColl && pColl->xCmp );
      }
      n = sqlite3ValueBytes(pVal, pColl->enc);
................................................................................
  sqlite3_value **pp
){
  if( pExpr->op==TK_VARIABLE
   || (pExpr->op==TK_REGISTER && pExpr->op2==TK_VARIABLE)
  ){
    int iVar = pExpr->iColumn;
    sqlite3VdbeSetVarmask(pParse->pVdbe, iVar);
    *pp = sqlite3VdbeGetValue(pParse->pReprepare, iVar, aff);
    return SQLITE_OK;
  }
  return sqlite3ValueFromExpr(pParse->db, pExpr, SQLITE_UTF8, aff, pp);
}
#endif

/*
................................................................................
*/
static int whereRangeScanEst(
  Parse *pParse,       /* Parsing & code generating context */
  Index *p,            /* The index containing the range-compared column; "x" */
  int nEq,             /* index into p->aCol[] of the range-compared column */
  WhereTerm *pLower,   /* Lower bound on the range. ex: "x>123" Might be NULL */
  WhereTerm *pUpper,   /* Upper bound on the range. ex: "x<455" Might be NULL */
  double *pRangeDiv   /* OUT: Reduce search space by this divisor */
){
  int rc = SQLITE_OK;

#ifdef SQLITE_ENABLE_STAT3

  if( nEq==0 && p->nSample ){
    sqlite3_value *pRangeVal;
    tRowcnt iLower = 0;
    tRowcnt iUpper = p->aiRowEst[0];
    tRowcnt a[2];
    u8 aff = p->pTable->aCol[p->aiColumn[0]].affinity;

    if( pLower ){
................................................................................
      ){
        iUpper = a[0];
        if( (pUpper->eOperator & WO_LE)!=0 ) iUpper += a[1];
      }
      sqlite3ValueFree(pRangeVal);
    }
    if( rc==SQLITE_OK ){
      if( iUpper<=iLower ){
        *pRangeDiv = (double)p->aiRowEst[0];
      }else{
        *pRangeDiv = (double)p->aiRowEst[0]/(double)(iUpper - iLower);
      }
      WHERETRACE(("range scan regions: %u..%u  div=%g\n",
                  (u32)iLower, (u32)iUpper, *pRangeDiv));
      return SQLITE_OK;
    }
  }
#else
  UNUSED_PARAMETER(pParse);
  UNUSED_PARAMETER(p);
  UNUSED_PARAMETER(nEq);
#endif
  assert( pLower || pUpper );
  *pRangeDiv = (double)1;


  if( pLower && (pLower->wtFlags & TERM_VNULL)==0 ) *pRangeDiv *= (double)4;


  if( pUpper ) *pRangeDiv *= (double)4;


  return rc;
}

#ifdef SQLITE_ENABLE_STAT3
/*
** Estimate the number of rows that will be returned based on
** an equality constraint x=VALUE and where that VALUE occurs in
................................................................................
** for a UTF conversion required for comparison.  The error is stored
** in the pParse structure.
*/
static int whereEqualScanEst(
  Parse *pParse,       /* Parsing & code generating context */
  Index *p,            /* The index whose left-most column is pTerm */
  Expr *pExpr,         /* Expression for VALUE in the x=VALUE constraint */
  double *pnRow        /* Write the revised row estimate here */
){
  sqlite3_value *pRhs = 0;  /* VALUE on right-hand side of pTerm */
  u8 aff;                   /* Column affinity */
  int rc;                   /* Subfunction return code */
  tRowcnt a[2];             /* Statistics */

  assert( p->aSample!=0 );
................................................................................
    if( rc ) goto whereEqualScanEst_cancel;
  }else{
    pRhs = sqlite3ValueNew(pParse->db);
  }
  if( pRhs==0 ) return SQLITE_NOTFOUND;
  rc = whereKeyStats(pParse, p, pRhs, 0, a);
  if( rc==SQLITE_OK ){
    WHERETRACE(("equality scan regions: %d\n", (int)a[1]));
    *pnRow = a[1];
  }
whereEqualScanEst_cancel:
  sqlite3ValueFree(pRhs);
  return rc;
}
#endif /* defined(SQLITE_ENABLE_STAT3) */
................................................................................
** for a UTF conversion required for comparison.  The error is stored
** in the pParse structure.
*/
static int whereInScanEst(
  Parse *pParse,       /* Parsing & code generating context */
  Index *p,            /* The index whose left-most column is pTerm */
  ExprList *pList,     /* The value list on the RHS of "x IN (v1,v2,v3,...)" */
  double *pnRow        /* Write the revised row estimate here */
){
  int rc = SQLITE_OK;         /* Subfunction return code */
  double nEst;                /* Number of rows for a single term */
  double nRowEst = (double)0; /* New estimate of the number of rows */
  int i;                      /* Loop counter */

  assert( p->aSample!=0 );
  for(i=0; rc==SQLITE_OK && i<pList->nExpr; i++){
    nEst = p->aiRowEst[0];
    rc = whereEqualScanEst(pParse, p, pList->a[i].pExpr, &nEst);
    nRowEst += nEst;
  }
  if( rc==SQLITE_OK ){
    if( nRowEst > p->aiRowEst[0] ) nRowEst = p->aiRowEst[0];
    *pnRow = nRowEst;
    WHERETRACE(("IN row estimate: est=%g\n", nRowEst));
  }
  return rc;
}
#endif /* defined(SQLITE_ENABLE_STAT3) */

/*
** Check to see if column iCol of the table with cursor iTab will appear
** in sorted order according to the current query plan.
**
** Return values:
**
**    0   iCol is not ordered
**    1   iCol has only a single value
**    2   iCol is in ASC order
**    3   iCol is in DESC order
*/
static int isOrderedColumn(
  WhereBestIdx *p,
  int iTab,
  int iCol
){
  int i, j;
  WhereLevel *pLevel = &p->aLevel[p->i-1];
  Index *pIdx;
  u8 sortOrder;
  for(i=p->i-1; i>=0; i--, pLevel--){
    if( pLevel->iTabCur!=iTab ) continue;
    if( (pLevel->plan.wsFlags & WHERE_ALL_UNIQUE)!=0 ){
      return 1;
    }
    assert( (pLevel->plan.wsFlags & WHERE_ORDERED)!=0 );
    if( (pIdx = pLevel->plan.u.pIdx)!=0 ){
      if( iCol<0 ){
        sortOrder = 0;
        testcase( (pLevel->plan.wsFlags & WHERE_REVERSE)!=0 );
      }else{
        int n = pIdx->nColumn;
        for(j=0; j<n; j++){
          if( iCol==pIdx->aiColumn[j] ) break;
        }
        if( j>=n ) return 0;
        sortOrder = pIdx->aSortOrder[j];
        testcase( (pLevel->plan.wsFlags & WHERE_REVERSE)!=0 );
      }
    }else{
      if( iCol!=(-1) ) return 0;
      sortOrder = 0;
      testcase( (pLevel->plan.wsFlags & WHERE_REVERSE)!=0 );
    }
    if( (pLevel->plan.wsFlags & WHERE_REVERSE)!=0 ){
      assert( sortOrder==0 || sortOrder==1 );
      testcase( sortOrder==1 );
      sortOrder = 1 - sortOrder;
    }
    return sortOrder+2;
  }
  return 0;
}

/*
** This routine decides if pIdx can be used to satisfy the ORDER BY
** clause, either in whole or in part.  The return value is the 
** cumulative number of terms in the ORDER BY clause that are satisfied
** by the index pIdx and other indices in outer loops.
**
** The table being queried has a cursor number of "base".  pIdx is the
** index that is postulated for use to access the table.
**
** The *pbRev value is set to 0 order 1 depending on whether or not
** pIdx should be run in the forward order or in reverse order.
*/
static int isSortingIndex(
  WhereBestIdx *p,    /* Best index search context */
  Index *pIdx,        /* The index we are testing */
  int base,           /* Cursor number for the table to be sorted */
  int *pbRev,         /* Set to 1 for reverse-order scan of pIdx */
  int *pbObUnique     /* ORDER BY column values will different in every row */
){
  int i;                        /* Number of pIdx terms used */
  int j;                        /* Number of ORDER BY terms satisfied */
  int sortOrder = 2;            /* 0: forward.  1: backward.  2: unknown */
  int nTerm;                    /* Number of ORDER BY terms */
  struct ExprList_item *pOBItem;/* A term of the ORDER BY clause */
  Table *pTab = pIdx->pTable;   /* Table that owns index pIdx */
  ExprList *pOrderBy;           /* The ORDER BY clause */
  Parse *pParse = p->pParse;    /* Parser context */
  sqlite3 *db = pParse->db;     /* Database connection */
  int nPriorSat;                /* ORDER BY terms satisfied by outer loops */
  int seenRowid = 0;            /* True if an ORDER BY rowid term is seen */
  int uniqueNotNull;            /* pIdx is UNIQUE with all terms are NOT NULL */
  int outerObUnique;            /* Outer loops generate different values in
                                ** every row for the ORDER BY columns */

  if( p->i==0 ){
    nPriorSat = 0;
    outerObUnique = 1;
  }else{
    u32 wsFlags = p->aLevel[p->i-1].plan.wsFlags;
    nPriorSat = p->aLevel[p->i-1].plan.nOBSat;
    if( (wsFlags & WHERE_ORDERED)==0 ){
      /* This loop cannot be ordered unless the next outer loop is
      ** also ordered */
      return nPriorSat;
    }
    if( OptimizationDisabled(db, SQLITE_OrderByIdxJoin) ){
      /* Only look at the outer-most loop if the OrderByIdxJoin
      ** optimization is disabled */
      return nPriorSat;
    }
    testcase( wsFlags & WHERE_OB_UNIQUE );
    testcase( wsFlags & WHERE_ALL_UNIQUE );
    outerObUnique = (wsFlags & (WHERE_OB_UNIQUE|WHERE_ALL_UNIQUE))!=0;
  }
  pOrderBy = p->pOrderBy;
  assert( pOrderBy!=0 );
  if( pIdx->bUnordered ){
    /* Hash indices (indicated by the "unordered" tag on sqlite_stat1) cannot
    ** be used for sorting */
    return nPriorSat;
  }
  nTerm = pOrderBy->nExpr;
  uniqueNotNull = pIdx->onError!=OE_None;
  assert( nTerm>0 );

  /* Argument pIdx must either point to a 'real' named index structure, 
  ** or an index structure allocated on the stack by bestBtreeIndex() to
  ** represent the rowid index that is part of every table.  */
  assert( pIdx->zName || (pIdx->nColumn==1 && pIdx->aiColumn[0]==-1) );

  /* Match terms of the ORDER BY clause against columns of
  ** the index.
  **
  ** Note that indices have pIdx->nColumn regular columns plus
  ** one additional column containing the rowid.  The rowid column
  ** of the index is also allowed to match against the ORDER BY
  ** clause.
  */
  j = nPriorSat;
  for(i=0,pOBItem=&pOrderBy->a[j]; j<nTerm && i<=pIdx->nColumn; i++){
    Expr *pOBExpr;          /* The expression of the ORDER BY pOBItem */
    CollSeq *pColl;         /* The collating sequence of pOBExpr */
    int termSortOrder;      /* Sort order for this term */
    int iColumn;            /* The i-th column of the index.  -1 for rowid */
    int iSortOrder;         /* 1 for DESC, 0 for ASC on the i-th index term */
    int isEq;               /* Subject to an == or IS NULL constraint */
    int isMatch;            /* ORDER BY term matches the index term */
    const char *zColl;      /* Name of collating sequence for i-th index term */
    WhereTerm *pConstraint; /* A constraint in the WHERE clause */

    /* If the next term of the ORDER BY clause refers to anything other than
    ** a column in the "base" table, then this index will not be of any
    ** further use in handling the ORDER BY. */
    pOBExpr = sqlite3ExprSkipCollate(pOBItem->pExpr);
    if( pOBExpr->op!=TK_COLUMN || pOBExpr->iTable!=base ){
      break;
    }

    /* Find column number and collating sequence for the next entry
    ** in the index */
    if( pIdx->zName && i<pIdx->nColumn ){
      iColumn = pIdx->aiColumn[i];
      if( iColumn==pIdx->pTable->iPKey ){
        iColumn = -1;
      }
      iSortOrder = pIdx->aSortOrder[i];
      zColl = pIdx->azColl[i];
      assert( zColl!=0 );
    }else{
      iColumn = -1;
      iSortOrder = 0;
      zColl = 0;
    }

    /* Check to see if the column number and collating sequence of the
    ** index match the column number and collating sequence of the ORDER BY
    ** clause entry.  Set isMatch to 1 if they both match. */
    if( pOBExpr->iColumn==iColumn ){
      if( zColl ){
        pColl = sqlite3ExprCollSeq(pParse, pOBItem->pExpr);
        if( !pColl ) pColl = db->pDfltColl;
        isMatch = sqlite3StrICmp(pColl->zName, zColl)==0;
      }else{
        isMatch = 1;
      }
    }else{
      isMatch = 0;
    }

    /* termSortOrder is 0 or 1 for whether or not the access loop should
    ** run forward or backwards (respectively) in order to satisfy this 
    ** term of the ORDER BY clause. */
    assert( pOBItem->sortOrder==0 || pOBItem->sortOrder==1 );
    assert( iSortOrder==0 || iSortOrder==1 );
    termSortOrder = iSortOrder ^ pOBItem->sortOrder;

    /* If X is the column in the index and ORDER BY clause, check to see
    ** if there are any X= or X IS NULL constraints in the WHERE clause. */
    pConstraint = findTerm(p->pWC, base, iColumn, p->notReady,
                           WO_EQ|WO_ISNULL|WO_IN, pIdx);
    if( pConstraint==0 ){
      isEq = 0;
    }else if( (pConstraint->eOperator & WO_IN)!=0 ){
      isEq = 0;
    }else if( (pConstraint->eOperator & WO_ISNULL)!=0 ){
      uniqueNotNull = 0;
      isEq = 1;  /* "X IS NULL" means X has only a single value */
    }else if( pConstraint->prereqRight==0 ){
      isEq = 1;  /* Constraint "X=constant" means X has only a single value */
    }else{
      Expr *pRight = pConstraint->pExpr->pRight;
      if( pRight->op==TK_COLUMN ){
        WHERETRACE(("       .. isOrderedColumn(tab=%d,col=%d)",
                    pRight->iTable, pRight->iColumn));
        isEq = isOrderedColumn(p, pRight->iTable, pRight->iColumn);
        WHERETRACE((" -> isEq=%d\n", isEq));

        /* If the constraint is of the form X=Y where Y is an ordered value
        ** in an outer loop, then make sure the sort order of Y matches the
        ** sort order required for X. */
        if( isMatch && isEq>=2 && isEq!=pOBItem->sortOrder+2 ){
          testcase( isEq==2 );
          testcase( isEq==3 );
          break;
        }
      }else{
        isEq = 0;  /* "X=expr" places no ordering constraints on X */
      }
    }
    if( !isMatch ){
      if( isEq==0 ){
        break;
      }else{
        continue;
      }
    }else if( isEq!=1 ){
      if( sortOrder==2 ){
        sortOrder = termSortOrder;
      }else if( termSortOrder!=sortOrder ){
        break;
      }
    }
    j++;
    pOBItem++;
    if( iColumn<0 ){
      seenRowid = 1;
      break;
    }else if( pTab->aCol[iColumn].notNull==0 && isEq!=1 ){
      testcase( isEq==0 );
      testcase( isEq==2 );
      testcase( isEq==3 );
      uniqueNotNull = 0;
    }
  }
  if( seenRowid ){
    uniqueNotNull = 1;
  }else if( uniqueNotNull==0 || i<pIdx->nColumn ){
    uniqueNotNull = 0;
  }

  /* If we have not found at least one ORDER BY term that matches the
  ** index, then show no progress. */
  if( pOBItem==&pOrderBy->a[nPriorSat] ) return nPriorSat;

  /* Either the outer queries must generate rows where there are no two
  ** rows with the same values in all ORDER BY columns, or else this
  ** loop must generate just a single row of output.  Example:  Suppose
  ** the outer loops generate A=1 and A=1, and this loop generates B=3
  ** and B=4.  Then without the following test, ORDER BY A,B would 
  ** generate the wrong order output: 1,3 1,4 1,3 1,4
  */
  if( outerObUnique==0 && uniqueNotNull==0 ) return nPriorSat;
  *pbObUnique = uniqueNotNull;

  /* Return the necessary scan order back to the caller */
  *pbRev = sortOrder & 1;

  /* If there was an "ORDER BY rowid" term that matched, or it is only
  ** possible for a single row from this table to match, then skip over
  ** any additional ORDER BY terms dealing with this table.
  */
  if( uniqueNotNull ){
    /* Advance j over additional ORDER BY terms associated with base */
    WhereMaskSet *pMS = p->pWC->pMaskSet;
    Bitmask m = ~getMask(pMS, base);
    while( j<nTerm && (exprTableUsage(pMS, pOrderBy->a[j].pExpr)&m)==0 ){
      j++;
    }
  }
  return j;
}

/*
** Find the best query plan for accessing a particular table.  Write the
** best query plan and its cost into the p->cost.
**
** The lowest cost plan wins.  The cost is an estimate of the amount of
** CPU and disk I/O needed to process the requested result.
** Factors that influence cost include:
**
**    *  The estimated number of rows that will be retrieved.  (The
**       fewer the better.)
**
**    *  Whether or not sorting must occur.
**
**    *  Whether or not there must be separate lookups in the
**       index and in the main table.
**
** If there was an INDEXED BY clause (pSrc->pIndex) attached to the table in
** the SQL statement, then this function only considers plans using the 
** named index. If no such plan is found, then the returned cost is
** SQLITE_BIG_DBL. If a plan is found that uses the named index, 
** then the cost is calculated in the usual way.
**
** If a NOT INDEXED clause was attached to the table 
** in the SELECT statement, then no indexes are considered. However, the 
** selected plan may still take advantage of the built-in rowid primary key
** index.
*/
static void bestBtreeIndex(WhereBestIdx *p){
  Parse *pParse = p->pParse;  /* The parsing context */
  WhereClause *pWC = p->pWC;  /* The WHERE clause */
  struct SrcList_item *pSrc = p->pSrc; /* The FROM clause term to search */
  int iCur = pSrc->iCursor;   /* The cursor of the table to be accessed */
  Index *pProbe;              /* An index we are evaluating */
  Index *pIdx;                /* Copy of pProbe, or zero for IPK index */
  int eqTermMask;             /* Current mask of valid equality operators */
  int idxEqTermMask;          /* Index mask of valid equality operators */
  Index sPk;                  /* A fake index object for the primary key */
  tRowcnt aiRowEstPk[2];      /* The aiRowEst[] value for the sPk index */
  int aiColumnPk = -1;        /* The aColumn[] value for the sPk index */
  int wsFlagMask;             /* Allowed flags in p->cost.plan.wsFlag */
  int nPriorSat;              /* ORDER BY terms satisfied by outer loops */
  int nOrderBy;               /* Number of ORDER BY terms */
  char bSortInit;             /* Initializer for bSort in inner loop */
  char bDistInit;             /* Initializer for bDist in inner loop */


  /* Initialize the cost to a worst-case value */
  memset(&p->cost, 0, sizeof(p->cost));
  p->cost.rCost = SQLITE_BIG_DBL;

  /* If the pSrc table is the right table of a LEFT JOIN then we may not
  ** use an index to satisfy IS NULL constraints on that table.  This is
  ** because columns might end up being NULL if the table does not match -
  ** a circumstance which the index cannot help us discover.  Ticket #2177.
  */
  if( pSrc->jointype & JT_LEFT ){
    idxEqTermMask = WO_EQ|WO_IN;
  }else{
    idxEqTermMask = WO_EQ|WO_IN|WO_ISNULL;
  }

  if( pSrc->pIndex ){
    /* An INDEXED BY clause specifies a particular index to use */
    pIdx = pProbe = pSrc->pIndex;
    wsFlagMask = ~(WHERE_ROWID_EQ|WHERE_ROWID_RANGE);
    eqTermMask = idxEqTermMask;
  }else{
    /* There is no INDEXED BY clause.  Create a fake Index object in local
    ** variable sPk to represent the rowid primary key index.  Make this
    ** fake index the first in a chain of Index objects with all of the real
    ** indices to follow */
    Index *pFirst;                  /* First of real indices on the table */
    memset(&sPk, 0, sizeof(Index));
    sPk.nColumn = 1;
    sPk.aiColumn = &aiColumnPk;
    sPk.aiRowEst = aiRowEstPk;
    sPk.onError = OE_Replace;
    sPk.pTable = pSrc->pTab;
    aiRowEstPk[0] = pSrc->pTab->nRowEst;
    aiRowEstPk[1] = 1;
    pFirst = pSrc->pTab->pIndex;
    if( pSrc->notIndexed==0 ){
      /* The real indices of the table are only considered if the
      ** NOT INDEXED qualifier is omitted from the FROM clause */
      sPk.pNext = pFirst;
    }
    pProbe = &sPk;
    wsFlagMask = ~(
        WHERE_COLUMN_IN|WHERE_COLUMN_EQ|WHERE_COLUMN_NULL|WHERE_COLUMN_RANGE
    );
    eqTermMask = WO_EQ|WO_IN;
    pIdx = 0;
  }

  nOrderBy = p->pOrderBy ? p->pOrderBy->nExpr : 0;
  if( p->i ){
    nPriorSat = p->aLevel[p->i-1].plan.nOBSat;
    bSortInit = nPriorSat<nOrderBy;
    bDistInit = 0;
  }else{
    nPriorSat = 0;
    bSortInit = nOrderBy>0;
    bDistInit = p->pDistinct!=0;
  }

  /* Loop over all indices looking for the best one to use
  */
  for(; pProbe; pIdx=pProbe=pProbe->pNext){
    const tRowcnt * const aiRowEst = pProbe->aiRowEst;
    WhereCost pc;               /* Cost of using pProbe */
    double log10N = (double)1;  /* base-10 logarithm of nRow (inexact) */

    /* The following variables are populated based on the properties of
    ** index being evaluated. They are then used to determine the expected
    ** cost and number of rows returned.
    **
    **  pc.plan.nEq: 
    **    Number of equality terms that can be implemented using the index.
    **    In other words, the number of initial fields in the index that
    **    are used in == or IN or NOT NULL constraints of the WHERE clause.
    **
    **  nInMul:  
    **    The "in-multiplier". This is an estimate of how many seek operations 
    **    SQLite must perform on the index in question. For example, if the 
    **    WHERE clause is:
    **
    **      WHERE a IN (1, 2, 3) AND b IN (4, 5, 6)
    **
    **    SQLite must perform 9 lookups on an index on (a, b), so nInMul is 
    **    set to 9. Given the same schema and either of the following WHERE 
    **    clauses:
    **
    **      WHERE a =  1
    **      WHERE a >= 2
    **
    **    nInMul is set to 1.
    **
    **    If there exists a WHERE term of the form "x IN (SELECT ...)", then 
    **    the sub-select is assumed to return 25 rows for the purposes of 
    **    determining nInMul.
    **
    **  bInEst:  
    **    Set to true if there was at least one "x IN (SELECT ...)" term used 
    **    in determining the value of nInMul.  Note that the RHS of the
    **    IN operator must be a SELECT, not a value list, for this variable
    **    to be true.
    **
    **  rangeDiv:
    **    An estimate of a divisor by which to reduce the search space due
    **    to inequality constraints.  In the absence of sqlite_stat3 ANALYZE
    **    data, a single inequality reduces the search space to 1/4rd its
    **    original size (rangeDiv==4).  Two inequalities reduce the search
    **    space to 1/16th of its original size (rangeDiv==16).
    **
    **  bSort:   
    **    Boolean. True if there is an ORDER BY clause that will require an 
    **    external sort (i.e. scanning the index being evaluated will not 
    **    correctly order records).
    **
    **  bDist:
    **    Boolean. True if there is a DISTINCT clause that will require an 
    **    external btree.
    **
    **  bLookup: 
    **    Boolean. True if a table lookup is required for each index entry
    **    visited.  In other words, true if this is not a covering index.
    **    This is always false for the rowid primary key index of a table.
    **    For other indexes, it is true unless all the columns of the table
    **    used by the SELECT statement are present in the index (such an
    **    index is sometimes described as a covering index).
    **    For example, given the index on (a, b), the second of the following 
    **    two queries requires table b-tree lookups in order to find the value
    **    of column c, but the first does not because columns a and b are
    **    both available in the index.
    **
    **             SELECT a, b    FROM tbl WHERE a = 1;
    **             SELECT a, b, c FROM tbl WHERE a = 1;
    */
    int bInEst = 0;               /* True if "x IN (SELECT...)" seen */
    int nInMul = 1;               /* Number of distinct equalities to lookup */
    double rangeDiv = (double)1;  /* Estimated reduction in search space */
    int nBound = 0;               /* Number of range constraints seen */
    char bSort = bSortInit;       /* True if external sort required */
    char bDist = bDistInit;       /* True if index cannot help with DISTINCT */
    char bLookup = 0;             /* True if not a covering index */
    WhereTerm *pTerm;             /* A single term of the WHERE clause */
#ifdef SQLITE_ENABLE_STAT3
    WhereTerm *pFirstTerm = 0;    /* First term matching the index */
#endif

    WHERETRACE((
      "   %s(%s):\n",
      pSrc->pTab->zName, (pIdx ? pIdx->zName : "ipk")
    ));
    memset(&pc, 0, sizeof(pc));
    pc.plan.nOBSat = nPriorSat;

    /* Determine the values of pc.plan.nEq and nInMul */
    for(pc.plan.nEq=0; pc.plan.nEq<pProbe->nColumn; pc.plan.nEq++){
      int j = pProbe->aiColumn[pc.plan.nEq];
      pTerm = findTerm(pWC, iCur, j, p->notReady, eqTermMask, pIdx);
      if( pTerm==0 ) break;
      pc.plan.wsFlags |= (WHERE_COLUMN_EQ|WHERE_ROWID_EQ);
      testcase( pTerm->pWC!=pWC );
      if( pTerm->eOperator & WO_IN ){
        Expr *pExpr = pTerm->pExpr;
        pc.plan.wsFlags |= WHERE_COLUMN_IN;
        if( ExprHasProperty(pExpr, EP_xIsSelect) ){
          /* "x IN (SELECT ...)":  Assume the SELECT returns 25 rows */
          nInMul *= 25;
          bInEst = 1;
        }else if( ALWAYS(pExpr->x.pList && pExpr->x.pList->nExpr) ){
          /* "x IN (value, value, ...)" */
          nInMul *= pExpr->x.pList->nExpr;
        }
      }else if( pTerm->eOperator & WO_ISNULL ){
        pc.plan.wsFlags |= WHERE_COLUMN_NULL;
      }
#ifdef SQLITE_ENABLE_STAT3
      if( pc.plan.nEq==0 && pProbe->aSample ) pFirstTerm = pTerm;
#endif
      pc.used |= pTerm->prereqRight;
    }
 
    /* If the index being considered is UNIQUE, and there is an equality 
    ** constraint for all columns in the index, then this search will find
    ** at most a single row. In this case set the WHERE_UNIQUE flag to 
    ** indicate this to the caller.
    **
    ** Otherwise, if the search may find more than one row, test to see if
    ** there is a range constraint on indexed column (pc.plan.nEq+1) that
    ** can be optimized using the index. 
    */
    if( pc.plan.nEq==pProbe->nColumn && pProbe->onError!=OE_None ){
      testcase( pc.plan.wsFlags & WHERE_COLUMN_IN );
      testcase( pc.plan.wsFlags & WHERE_COLUMN_NULL );
      if( (pc.plan.wsFlags & (WHERE_COLUMN_IN|WHERE_COLUMN_NULL))==0 ){
        pc.plan.wsFlags |= WHERE_UNIQUE;
        if( p->i==0 || (p->aLevel[p->i-1].plan.wsFlags & WHERE_ALL_UNIQUE)!=0 ){
          pc.plan.wsFlags |= WHERE_ALL_UNIQUE;
        }
      }
    }else if( pProbe->bUnordered==0 ){
      int j;
      j = (pc.plan.nEq==pProbe->nColumn ? -1 : pProbe->aiColumn[pc.plan.nEq]);
      if( findTerm(pWC, iCur, j, p->notReady, WO_LT|WO_LE|WO_GT|WO_GE, pIdx) ){
        WhereTerm *pTop, *pBtm;
        pTop = findTerm(pWC, iCur, j, p->notReady, WO_LT|WO_LE, pIdx);
        pBtm = findTerm(pWC, iCur, j, p->notReady, WO_GT|WO_GE, pIdx);
        whereRangeScanEst(pParse, pProbe, pc.plan.nEq, pBtm, pTop, &rangeDiv);
        if( pTop ){
          nBound = 1;
          pc.plan.wsFlags |= WHERE_TOP_LIMIT;
          pc.used |= pTop->prereqRight;
          testcase( pTop->pWC!=pWC );
        }
        if( pBtm ){
          nBound++;
          pc.plan.wsFlags |= WHERE_BTM_LIMIT;
          pc.used |= pBtm->prereqRight;
          testcase( pBtm->pWC!=pWC );
        }
        pc.plan.wsFlags |= (WHERE_COLUMN_RANGE|WHERE_ROWID_RANGE);
      }
    }

    /* If there is an ORDER BY clause and the index being considered will
    ** naturally scan rows in the required order, set the appropriate flags
    ** in pc.plan.wsFlags. Otherwise, if there is an ORDER BY clause but
    ** the index will scan rows in a different order, set the bSort
    ** variable.  */
    if( bSort && (pSrc->jointype & JT_LEFT)==0 ){
      int bRev = 2;
      int bObUnique = 0;
      WHERETRACE(("      --> before isSortIndex: nPriorSat=%d\n",nPriorSat));
      pc.plan.nOBSat = isSortingIndex(p, pProbe, iCur, &bRev, &bObUnique);
      WHERETRACE(("      --> after  isSortIndex: bRev=%d bObU=%d nOBSat=%d\n",
                  bRev, bObUnique, pc.plan.nOBSat));
      if( nPriorSat<pc.plan.nOBSat || (pc.plan.wsFlags & WHERE_ALL_UNIQUE)!=0 ){
        pc.plan.wsFlags |= WHERE_ORDERED;
        if( bObUnique ) pc.plan.wsFlags |= WHERE_OB_UNIQUE;
      }
      if( nOrderBy==pc.plan.nOBSat ){
        bSort = 0;
        pc.plan.wsFlags |= WHERE_ROWID_RANGE|WHERE_COLUMN_RANGE;
      }
      if( bRev & 1 ) pc.plan.wsFlags |= WHERE_REVERSE;
    }

    /* If there is a DISTINCT qualifier and this index will scan rows in
    ** order of the DISTINCT expressions, clear bDist and set the appropriate
    ** flags in pc.plan.wsFlags. */
    if( bDist
     && isDistinctIndex(pParse, pWC, pProbe, iCur, p->pDistinct, pc.plan.nEq)
     && (pc.plan.wsFlags & WHERE_COLUMN_IN)==0
    ){
      bDist = 0;
      pc.plan.wsFlags |= WHERE_ROWID_RANGE|WHERE_COLUMN_RANGE|WHERE_DISTINCT;
    }

    /* If currently calculating the cost of using an index (not the IPK
    ** index), determine if all required column data may be obtained without 
    ** using the main table (i.e. if the index is a covering
    ** index for this query). If it is, set the WHERE_IDX_ONLY flag in
    ** pc.plan.wsFlags. Otherwise, set the bLookup variable to true.  */
    if( pIdx ){
      Bitmask m = pSrc->colUsed;
      int j;
      for(j=0; j<pIdx->nColumn; j++){
        int x = pIdx->aiColumn[j];
        if( x<BMS-1 ){
          m &= ~(((Bitmask)1)<<x);
        }
      }
      if( m==0 ){
        pc.plan.wsFlags |= WHERE_IDX_ONLY;
      }else{
        bLookup = 1;
      }
    }

    /*
    ** Estimate the number of rows of output.  For an "x IN (SELECT...)"
    ** constraint, do not let the estimate exceed half the rows in the table.
    */
    pc.plan.nRow = (double)(aiRowEst[pc.plan.nEq] * nInMul);
    if( bInEst && pc.plan.nRow*2>aiRowEst[0] ){
      pc.plan.nRow = aiRowEst[0]/2;
      nInMul = (int)(pc.plan.nRow / aiRowEst[pc.plan.nEq]);
    }

#ifdef SQLITE_ENABLE_STAT3
    /* If the constraint is of the form x=VALUE or x IN (E1,E2,...)
    ** and we do not think that values of x are unique and if histogram
    ** data is available for column x, then it might be possible
    ** to get a better estimate on the number of rows based on
    ** VALUE and how common that value is according to the histogram.
    */
    if( pc.plan.nRow>(double)1 && pc.plan.nEq==1
     && pFirstTerm!=0 && aiRowEst[1]>1 ){
      assert( (pFirstTerm->eOperator & (WO_EQ|WO_ISNULL|WO_IN))!=0 );
      if( pFirstTerm->eOperator & (WO_EQ|WO_ISNULL) ){
        testcase( pFirstTerm->eOperator & WO_EQ );
        testcase( pFirstTerm->eOperator & WO_EQUIV );
        testcase( pFirstTerm->eOperator & WO_ISNULL );
        whereEqualScanEst(pParse, pProbe, pFirstTerm->pExpr->pRight,
                          &pc.plan.nRow);
      }else if( bInEst==0 ){
        assert( pFirstTerm->eOperator & WO_IN );
        whereInScanEst(pParse, pProbe, pFirstTerm->pExpr->x.pList,
                       &pc.plan.nRow);
      }
    }
#endif /* SQLITE_ENABLE_STAT3 */

    /* Adjust the number of output rows and downward to reflect rows
    ** that are excluded by range constraints.
    */
    pc.plan.nRow = pc.plan.nRow/rangeDiv;
    if( pc.plan.nRow<1 ) pc.plan.nRow = 1;

    /* Experiments run on real SQLite databases show that the time needed
    ** to do a binary search to locate a row in a table or index is roughly
    ** log10(N) times the time to move from one row to the next row within
    ** a table or index.  The actual times can vary, with the size of
    ** records being an important factor.  Both moves and searches are
    ** slower with larger records, presumably because fewer records fit
    ** on one page and hence more pages have to be fetched.
    **
    ** The ANALYZE command and the sqlite_stat1 and sqlite_stat3 tables do
    ** not give us data on the relative sizes of table and index records.
    ** So this computation assumes table records are about twice as big
    ** as index records
    */
    if( (pc.plan.wsFlags&~(WHERE_REVERSE|WHERE_ORDERED|WHERE_OB_UNIQUE))
                                                              ==WHERE_IDX_ONLY
     && (pWC->wctrlFlags & WHERE_ONEPASS_DESIRED)==0
     && sqlite3GlobalConfig.bUseCis
     && OptimizationEnabled(pParse->db, SQLITE_CoverIdxScan)
    ){
      /* This index is not useful for indexing, but it is a covering index.
      ** A full-scan of the index might be a little faster than a full-scan
      ** of the table, so give this case a cost slightly less than a table
      ** scan. */
      pc.rCost = aiRowEst[0]*3 + pProbe->nColumn;
      pc.plan.wsFlags |= WHERE_COVER_SCAN|WHERE_COLUMN_RANGE;
    }else if( (pc.plan.wsFlags & WHERE_NOT_FULLSCAN)==0 ){
      /* The cost of a full table scan is a number of move operations equal
      ** to the number of rows in the table.
      **
      ** We add an additional 4x penalty to full table scans.  This causes
      ** the cost function to err on the side of choosing an index over
      ** choosing a full scan.  This 4x full-scan penalty is an arguable
      ** decision and one which we expect to revisit in the future.  But
      ** it seems to be working well enough at the moment.
      */
      pc.rCost = aiRowEst[0]*4;
      pc.plan.wsFlags &= ~WHERE_IDX_ONLY;
      if( pIdx ){
        pc.plan.wsFlags &= ~WHERE_ORDERED;
        pc.plan.nOBSat = nPriorSat;
      }
    }else{
      log10N = estLog(aiRowEst[0]);
      pc.rCost = pc.plan.nRow;
      if( pIdx ){
        if( bLookup ){
          /* For an index lookup followed by a table lookup:
          **    nInMul index searches to find the start of each index range
          **  + nRow steps through the index
          **  + nRow table searches to lookup the table entry using the rowid
          */
          pc.rCost += (nInMul + pc.plan.nRow)*log10N;
        }else{
          /* For a covering index:
          **     nInMul index searches to find the initial entry 
          **   + nRow steps through the index
          */
          pc.rCost += nInMul*log10N;
        }
      }else{
        /* For a rowid primary key lookup:
        **    nInMult table searches to find the initial entry for each range
        **  + nRow steps through the table
        */
        pc.rCost += nInMul*log10N;
      }
    }

    /* Add in the estimated cost of sorting the result.  Actual experimental
    ** measurements of sorting performance in SQLite show that sorting time
    ** adds C*N*log10(N) to the cost, where N is the number of rows to be 
    ** sorted and C is a factor between 1.95 and 4.3.  We will split the
    ** difference and select C of 3.0.
    */
    if( bSort ){
      double m = estLog(pc.plan.nRow*(nOrderBy - pc.plan.nOBSat)/nOrderBy);
      m *= (double)(pc.plan.nOBSat ? 2 : 3);
      pc.rCost += pc.plan.nRow*m;
    }
    if( bDist ){
      pc.rCost += pc.plan.nRow*estLog(pc.plan.nRow)*3;
    }

    /**** Cost of using this index has now been computed ****/

    /* If there are additional constraints on this table that cannot
    ** be used with the current index, but which might lower the number
    ** of output rows, adjust the nRow value accordingly.  This only 
    ** matters if the current index is the least costly, so do not bother
    ** with this step if we already know this index will not be chosen.
    ** Also, never reduce the output row count below 2 using this step.
    **
    ** It is critical that the notValid mask be used here instead of
    ** the notReady mask.  When computing an "optimal" index, the notReady
    ** mask will only have one bit set - the bit for the current table.
    ** The notValid mask, on the other hand, always has all bits set for
    ** tables that are not in outer loops.  If notReady is used here instead
    ** of notValid, then a optimal index that depends on inner joins loops
    ** might be selected even when there exists an optimal index that has
    ** no such dependency.
    */
    if( pc.plan.nRow>2 && pc.rCost<=p->cost.rCost ){
      int k;                       /* Loop counter */
      int nSkipEq = pc.plan.nEq;   /* Number of == constraints to skip */
      int nSkipRange = nBound;     /* Number of < constraints to skip */
      Bitmask thisTab;             /* Bitmap for pSrc */

      thisTab = getMask(pWC->pMaskSet, iCur);
      for(pTerm=pWC->a, k=pWC->nTerm; pc.plan.nRow>2 && k; k--, pTerm++){
        if( pTerm->wtFlags & TERM_VIRTUAL ) continue;
        if( (pTerm->prereqAll & p->notValid)!=thisTab ) continue;
        if( pTerm->eOperator & (WO_EQ|WO_IN|WO_ISNULL) ){
          if( nSkipEq ){
            /* Ignore the first pc.plan.nEq equality matches since the index
            ** has already accounted for these */
            nSkipEq--;
          }else{
            /* Assume each additional equality match reduces the result
            ** set size by a factor of 10 */
            pc.plan.nRow /= 10;
          }
        }else if( pTerm->eOperator & (WO_LT|WO_LE|WO_GT|WO_GE) ){
          if( nSkipRange ){
            /* Ignore the first nSkipRange range constraints since the index
            ** has already accounted for these */
            nSkipRange--;
          }else{
            /* Assume each additional range constraint reduces the result
            ** set size by a factor of 3.  Indexed range constraints reduce
            ** the search space by a larger factor: 4.  We make indexed range
            ** more selective intentionally because of the subjective 
            ** observation that indexed range constraints really are more
            ** selective in practice, on average. */
            pc.plan.nRow /= 3;
          }
        }else if( (pTerm->eOperator & WO_NOOP)==0 ){
          /* Any other expression lowers the output row count by half */
          pc.plan.nRow /= 2;
        }
      }
      if( pc.plan.nRow<2 ) pc.plan.nRow = 2;
    }


    WHERETRACE((
      "      nEq=%d nInMul=%d rangeDiv=%d bSort=%d bLookup=%d wsFlags=0x%08x\n"
      "      notReady=0x%llx log10N=%.1f nRow=%.1f cost=%.1f\n"
      "      used=0x%llx nOBSat=%d\n",
      pc.plan.nEq, nInMul, (int)rangeDiv, bSort, bLookup, pc.plan.wsFlags,
      p->notReady, log10N, pc.plan.nRow, pc.rCost, pc.used,
      pc.plan.nOBSat
    ));

    /* If this index is the best we have seen so far, then record this
    ** index and its cost in the p->cost structure.
    */
    if( (!pIdx || pc.plan.wsFlags) && compareCost(&pc, &p->cost) ){
      p->cost = pc;
      p->cost.plan.wsFlags &= wsFlagMask;
      p->cost.plan.u.pIdx = pIdx;
    }

    /* If there was an INDEXED BY clause, then only that one index is
    ** considered. */
    if( pSrc->pIndex ) break;

    /* Reset masks for the next index in the loop */
    wsFlagMask = ~(WHERE_ROWID_EQ|WHERE_ROWID_RANGE);
    eqTermMask = idxEqTermMask;
  }

  /* If there is no ORDER BY clause and the SQLITE_ReverseOrder flag
  ** is set, then reverse the order that the index will be scanned
  ** in. This is used for application testing, to help find cases
  ** where application behavior depends on the (undefined) order that
  ** SQLite outputs rows in in the absence of an ORDER BY clause.  */
  if( !p->pOrderBy && pParse->db->flags & SQLITE_ReverseOrder ){
    p->cost.plan.wsFlags |= WHERE_REVERSE;
  }

  assert( p->pOrderBy || (p->cost.plan.wsFlags&WHERE_ORDERED)==0 );
  assert( p->cost.plan.u.pIdx==0 || (p->cost.plan.wsFlags&WHERE_ROWID_EQ)==0 );
  assert( pSrc->pIndex==0 
       || p->cost.plan.u.pIdx==0 
       || p->cost.plan.u.pIdx==pSrc->pIndex 
  );

  WHERETRACE(("   best index is %s cost=%.1f\n",
         p->cost.plan.u.pIdx ? p->cost.plan.u.pIdx->zName : "ipk",
         p->cost.rCost));
  
  bestOrClauseIndex(p);
  bestAutomaticIndex(p);
  p->cost.plan.wsFlags |= eqTermMask;
}

/*
** Find the query plan for accessing table pSrc->pTab. Write the
** best query plan and its cost into the WhereCost object supplied 
** as the last parameter. This function may calculate the cost of
** both real and virtual table scans.
**
** This function does not take ORDER BY or DISTINCT into account.  Nor
** does it remember the virtual table query plan.  All it does is compute
** the cost while determining if an OR optimization is applicable.  The
** details will be reconsidered later if the optimization is found to be
** applicable.
*/
static void bestIndex(WhereBestIdx *p){
#ifndef SQLITE_OMIT_VIRTUALTABLE
  if( IsVirtual(p->pSrc->pTab) ){
    sqlite3_index_info *pIdxInfo = 0;
    p->ppIdxInfo = &pIdxInfo;
    bestVirtualIndex(p);
    assert( pIdxInfo!=0 || p->pParse->db->mallocFailed );
    if( pIdxInfo && pIdxInfo->needToFreeIdxStr ){
      sqlite3_free(pIdxInfo->idxStr);
    }
    sqlite3DbFree(p->pParse->db, pIdxInfo);
  }else
#endif
  {
    bestBtreeIndex(p);
  }
}

/*
** Disable a term in the WHERE clause.  Except, do not disable the term
** if it controls a LEFT OUTER JOIN and it did not originate in the ON
** or USING clause of that join.
**
** Consider the term t2.z='ok' in the following queries:
................................................................................
**   (2)  SELECT * FROM t1 LEFT JOIN t2 ON t1.a=t2.x AND t2.z='ok'
**   (3)  SELECT * FROM t1, t2 WHERE t1.a=t2.x AND t2.z='ok'
**
** The t2.z='ok' is disabled in the in (2) because it originates
** in the ON clause.  The term is disabled in (3) because it is not part
** of a LEFT OUTER JOIN.  In (1), the term is not disabled.
**
** IMPLEMENTATION-OF: R-24597-58655 No tests are done for terms that are
** completely satisfied by indices.
**
** Disabling a term causes that term to not be tested in the inner loop
** of the join.  Disabling is an optimization.  When terms are satisfied
** by indices, we disable them to prevent redundant tests in the inner
** loop.  We would get the correct results if nothing were ever disabled,
** but joins might run a little slower.  The trick is to disable as much
** as we can without disabling too much.  If we disabled in (1), we'd get
** the wrong answer.  See ticket #813.
................................................................................
** this routine sets up a loop that will iterate over all values of X.
*/
static int codeEqualityTerm(
  Parse *pParse,      /* The parsing context */
  WhereTerm *pTerm,   /* The term of the WHERE clause to be coded */
  WhereLevel *pLevel, /* The level of the FROM clause we are working on */
  int iEq,            /* Index of the equality term within this level */

  int iTarget         /* Attempt to leave results in this register */
){
  Expr *pX = pTerm->pExpr;
  Vdbe *v = pParse->pVdbe;
  int iReg;                  /* Register holding results */

  assert( iTarget>0 );
................................................................................
    iReg = iTarget;
    sqlite3VdbeAddOp2(v, OP_Null, 0, iReg);
#ifndef SQLITE_OMIT_SUBQUERY
  }else{
    int eType;
    int iTab;
    struct InLoop *pIn;
    u8 bRev = (pLevel->plan.wsFlags & WHERE_REVERSE)!=0;

    if( (pLevel->plan.wsFlags & WHERE_INDEXED)!=0 

      && pLevel->plan.u.pIdx->aSortOrder[iEq]
    ){
      testcase( iEq==0 );
      testcase( iEq==pLevel->plan.u.pIdx->nColumn-1 );
      testcase( iEq>0 && iEq+1<pLevel->plan.u.pIdx->nColumn );
      testcase( bRev );
      bRev = !bRev;
    }
    assert( pX->op==TK_IN );
    iReg = iTarget;
    eType = sqlite3FindInIndex(pParse, pX, 0);
    if( eType==IN_INDEX_INDEX_DESC ){
      testcase( bRev );
      bRev = !bRev;
    }
    iTab = pX->iTable;
    sqlite3VdbeAddOp2(v, bRev ? OP_Last : OP_Rewind, iTab, 0);
    assert( pLevel->plan.wsFlags & WHERE_IN_ABLE );

    if( pLevel->u.in.nIn==0 ){
      pLevel->addrNxt = sqlite3VdbeMakeLabel(v);
    }
    pLevel->u.in.nIn++;
    pLevel->u.in.aInLoop =
       sqlite3DbReallocOrFree(pParse->db, pLevel->u.in.aInLoop,
                              sizeof(pLevel->u.in.aInLoop[0])*pLevel->u.in.nIn);
................................................................................
** no conversion should be attempted before using a t2.b value as part of
** a key to search the index. Hence the first byte in the returned affinity
** string in this example would be set to SQLITE_AFF_NONE.
*/
static int codeAllEqualityTerms(
  Parse *pParse,        /* Parsing context */
  WhereLevel *pLevel,   /* Which nested loop of the FROM we are coding */
  WhereClause *pWC,     /* The WHERE clause */
  Bitmask notReady,     /* Which parts of FROM have not yet been coded */
  int nExtraReg,        /* Number of extra registers to allocate */
  char **pzAff          /* OUT: Set to point to affinity string */
){
  int nEq = pLevel->plan.nEq;   /* The number of == or IN constraints to code */
  Vdbe *v = pParse->pVdbe;      /* The vm under construction */
  Index *pIdx;                  /* The index being used for this loop */
  int iCur = pLevel->iTabCur;   /* The cursor of the table */
  WhereTerm *pTerm;             /* A single constraint term */

  int j;                        /* Loop counter */
  int regBase;                  /* Base register */
  int nReg;                     /* Number of registers to allocate */
  char *zAff;                   /* Affinity string to return */

  /* This module is only called on query plans that use an index. */
  assert( pLevel->plan.wsFlags & WHERE_INDEXED );
  pIdx = pLevel->plan.u.pIdx;





  /* Figure out how many memory cells we will need then allocate them.
  */
  regBase = pParse->nMem + 1;
  nReg = pLevel->plan.nEq + nExtraReg;
  pParse->nMem += nReg;

  zAff = sqlite3DbStrDup(pParse->db, sqlite3IndexAffinityStr(v, pIdx));
  if( !zAff ){
    pParse->db->mallocFailed = 1;
  }

  /* Evaluate the equality constraints
  */
  assert( pIdx->nColumn>=nEq );
  for(j=0; j<nEq; j++){
    int r1;
    int k = pIdx->aiColumn[j];
    pTerm = findTerm(pWC, iCur, k, notReady, pLevel->plan.wsFlags, pIdx);
    if( pTerm==0 ) break;
    /* The following true for indices with redundant columns. 
    ** Ex: CREATE INDEX i1 ON t1(a,b,a); SELECT * FROM t1 WHERE a=0 AND b=0; */
    testcase( (pTerm->wtFlags & TERM_CODED)!=0 );
    testcase( pTerm->wtFlags & TERM_VIRTUAL ); /* EV: R-30575-11662 */
    r1 = codeEqualityTerm(pParse, pTerm, pLevel, j, regBase+j);
    if( r1!=regBase+j ){
      if( nReg==1 ){
        sqlite3ReleaseTempReg(pParse, regBase);
        regBase = r1;
      }else{
        sqlite3VdbeAddOp2(v, OP_SCopy, r1, regBase+j);
      }
................................................................................
**
**   "a=? AND b>?"
**
** The returned pointer points to memory obtained from sqlite3DbMalloc().
** It is the responsibility of the caller to free the buffer when it is
** no longer required.
*/
static char *explainIndexRange(sqlite3 *db, WhereLevel *pLevel, Table *pTab){
  WherePlan *pPlan = &pLevel->plan;
  Index *pIndex = pPlan->u.pIdx;
  int nEq = pPlan->nEq;
  int i, j;
  Column *aCol = pTab->aCol;
  int *aiColumn = pIndex->aiColumn;
  StrAccum txt;

  if( nEq==0 && (pPlan->wsFlags & (WHERE_BTM_LIMIT|WHERE_TOP_LIMIT))==0 ){
    return 0;
  }
  sqlite3StrAccumInit(&txt, 0, 0, SQLITE_MAX_LENGTH);
  txt.db = db;
  sqlite3StrAccumAppend(&txt, " (", 2);
  for(i=0; i<nEq; i++){

    explainAppendTerm(&txt, i, aCol[aiColumn[i]].zName, "=");
  }

  j = i;
  if( pPlan->wsFlags&WHERE_BTM_LIMIT ){
    char *z = (j==pIndex->nColumn ) ? "rowid" : aCol[aiColumn[j]].zName;
    explainAppendTerm(&txt, i++, z, ">");
  }
  if( pPlan->wsFlags&WHERE_TOP_LIMIT ){
    char *z = (j==pIndex->nColumn ) ? "rowid" : aCol[aiColumn[j]].zName;
    explainAppendTerm(&txt, i, z, "<");
  }
  sqlite3StrAccumAppend(&txt, ")", 1);
  return sqlite3StrAccumFinish(&txt);
}

................................................................................
  SrcList *pTabList,              /* Table list this loop refers to */
  WhereLevel *pLevel,             /* Scan to write OP_Explain opcode for */
  int iLevel,                     /* Value for "level" column of output */
  int iFrom,                      /* Value for "from" column of output */
  u16 wctrlFlags                  /* Flags passed to sqlite3WhereBegin() */
){
  if( pParse->explain==2 ){
    u32 flags = pLevel->plan.wsFlags;
    struct SrcList_item *pItem = &pTabList->a[pLevel->iFrom];
    Vdbe *v = pParse->pVdbe;      /* VM being constructed */
    sqlite3 *db = pParse->db;     /* Database handle */
    char *zMsg;                   /* Text to add to EQP output */
    sqlite3_int64 nRow;           /* Expected number of rows visited by scan */
    int iId = pParse->iSelectId;  /* Select id (left-most output column) */
    int isSearch;                 /* True for a SEARCH. False for SCAN. */





    if( (flags&WHERE_MULTI_OR) || (wctrlFlags&WHERE_ONETABLE_ONLY) ) return;

    isSearch = (pLevel->plan.nEq>0)
             || (flags&(WHERE_BTM_LIMIT|WHERE_TOP_LIMIT))!=0

             || (wctrlFlags&(WHERE_ORDERBY_MIN|WHERE_ORDERBY_MAX));

    zMsg = sqlite3MPrintf(db, "%s", isSearch?"SEARCH":"SCAN");
    if( pItem->pSelect ){
      zMsg = sqlite3MAppendf(db, zMsg, "%s SUBQUERY %d", zMsg,pItem->iSelectId);
    }else{
      zMsg = sqlite3MAppendf(db, zMsg, "%s TABLE %s", zMsg, pItem->zName);
    }

    if( pItem->zAlias ){
      zMsg = sqlite3MAppendf(db, zMsg, "%s AS %s", zMsg, pItem->zAlias);
    }
    if( (flags & WHERE_INDEXED)!=0 ){
      char *zWhere = explainIndexRange(db, pLevel, pItem->pTab);
      zMsg = sqlite3MAppendf(db, zMsg, "%s USING %s%sINDEX%s%s%s", zMsg, 
          ((flags & WHERE_TEMP_INDEX)?"AUTOMATIC ":""),
          ((flags & WHERE_IDX_ONLY)?"COVERING ":""),
          ((flags & WHERE_TEMP_INDEX)?"":" "),
          ((flags & WHERE_TEMP_INDEX)?"": pLevel->plan.u.pIdx->zName),
          zWhere
      );
      sqlite3DbFree(db, zWhere);
    }else if( flags & (WHERE_ROWID_EQ|WHERE_ROWID_RANGE) ){
      zMsg = sqlite3MAppendf(db, zMsg, "%s USING INTEGER PRIMARY KEY", zMsg);

      if( flags&WHERE_ROWID_EQ ){

        zMsg = sqlite3MAppendf(db, zMsg, "%s (rowid=?)", zMsg);
      }else if( (flags&WHERE_BOTH_LIMIT)==WHERE_BOTH_LIMIT ){
        zMsg = sqlite3MAppendf(db, zMsg, "%s (rowid>? AND rowid<?)", zMsg);
      }else if( flags&WHERE_BTM_LIMIT ){
        zMsg = sqlite3MAppendf(db, zMsg, "%s (rowid>?)", zMsg);
      }else if( flags&WHERE_TOP_LIMIT ){
        zMsg = sqlite3MAppendf(db, zMsg, "%s (rowid<?)", zMsg);
      }
    }
#ifndef SQLITE_OMIT_VIRTUALTABLE
    else if( (flags & WHERE_VIRTUALTABLE)!=0 ){
      sqlite3_index_info *pVtabIdx = pLevel->plan.u.pVtabIdx;
      zMsg = sqlite3MAppendf(db, zMsg, "%s VIRTUAL TABLE INDEX %d:%s", zMsg,
                  pVtabIdx->idxNum, pVtabIdx->idxStr);

    }
#endif
    if( wctrlFlags&(WHERE_ORDERBY_MIN|WHERE_ORDERBY_MAX) ){
      testcase( wctrlFlags & WHERE_ORDERBY_MIN );
      nRow = 1;
    }else{
      nRow = (sqlite3_int64)pLevel->plan.nRow;
    }
    zMsg = sqlite3MAppendf(db, zMsg, "%s (~%lld rows)", zMsg, nRow);
    sqlite3VdbeAddOp4(v, OP_Explain, iId, iLevel, iFrom, zMsg, P4_DYNAMIC);
  }
}
#else
# define explainOneScan(u,v,w,x,y,z)
#endif /* SQLITE_OMIT_EXPLAIN */

................................................................................
/*
** Generate code for the start of the iLevel-th loop in the WHERE clause
** implementation described by pWInfo.
*/
static Bitmask codeOneLoopStart(
  WhereInfo *pWInfo,   /* Complete information about the WHERE clause */
  int iLevel,          /* Which level of pWInfo->a[] should be coded */
  u16 wctrlFlags,      /* One of the WHERE_* flags defined in sqliteInt.h */
  Bitmask notReady     /* Which tables are currently available */
){
  int j, k;            /* Loop counters */
  int iCur;            /* The VDBE cursor for the table */
  int addrNxt;         /* Where to jump to continue with the next IN case */
  int omitTable;       /* True if we use the index only */
  int bRev;            /* True if we need to scan in reverse order */
  WhereLevel *pLevel;  /* The where level to be coded */

  WhereClause *pWC;    /* Decomposition of the entire WHERE clause */
  WhereTerm *pTerm;               /* A WHERE clause term */
  Parse *pParse;                  /* Parsing context */

  Vdbe *v;                        /* The prepared stmt under constructions */
  struct SrcList_item *pTabItem;  /* FROM clause term being coded */
  int addrBrk;                    /* Jump here to break out of the loop */
  int addrCont;                   /* Jump here to continue with next cycle */
  int iRowidReg = 0;        /* Rowid is stored in this register, if not zero */
  int iReleaseReg = 0;      /* Temp register to free before returning */
  Bitmask newNotReady;      /* Return value */

  pParse = pWInfo->pParse;
  v = pParse->pVdbe;
  pWC = pWInfo->pWC;

  pLevel = &pWInfo->a[iLevel];

  pTabItem = &pWInfo->pTabList->a[pLevel->iFrom];
  iCur = pTabItem->iCursor;
  bRev = (pLevel->plan.wsFlags & WHERE_REVERSE)!=0;

  omitTable = (pLevel->plan.wsFlags & WHERE_IDX_ONLY)!=0 
           && (wctrlFlags & WHERE_FORCE_TABLE)==0;
  VdbeNoopComment((v, "Begin Join Loop %d", iLevel));

  /* Create labels for the "break" and "continue" instructions
  ** for the current loop.  Jump to addrBrk to break out of a loop.
  ** Jump to cont to go immediately to the next iteration of the
  ** loop.
  **
................................................................................
    pLevel->p2 =  sqlite3VdbeAddOp1(v, OP_Yield, regYield);
    VdbeComment((v, "next row of co-routine %s", pTabItem->pTab->zName));
    sqlite3VdbeAddOp2(v, OP_If, regYield+1, addrBrk);
    pLevel->op = OP_Goto;
  }else

#ifndef SQLITE_OMIT_VIRTUALTABLE
  if(  (pLevel->plan.wsFlags & WHERE_VIRTUALTABLE)!=0 ){
    /* Case 0:  The table is a virtual-table.  Use the VFilter and VNext
    **          to access the data.
    */
    int iReg;   /* P3 Value for OP_VFilter */
    int addrNotFound;
    sqlite3_index_info *pVtabIdx = pLevel->plan.u.pVtabIdx;
    int nConstraint = pVtabIdx->nConstraint;
    struct sqlite3_index_constraint_usage *aUsage =
                                                pVtabIdx->aConstraintUsage;
    const struct sqlite3_index_constraint *aConstraint =
                                                pVtabIdx->aConstraint;

    sqlite3ExprCachePush(pParse);
    iReg = sqlite3GetTempRange(pParse, nConstraint+2);
    addrNotFound = pLevel->addrBrk;
    for(j=1; j<=nConstraint; j++){
      for(k=0; k<nConstraint; k++){
        if( aUsage[k].argvIndex==j ){
          int iTarget = iReg+j+1;
          pTerm = &pWC->a[aConstraint[k].iTermOffset];


          if( pTerm->eOperator & WO_IN ){
            codeEqualityTerm(pParse, pTerm, pLevel, k, iTarget);
            addrNotFound = pLevel->addrNxt;
          }else{
            sqlite3ExprCode(pParse, pTerm->pExpr->pRight, iTarget);
          }
          break;
        }
      }
      if( k==nConstraint ) break;
    }
    sqlite3VdbeAddOp2(v, OP_Integer, pVtabIdx->idxNum, iReg);
    sqlite3VdbeAddOp2(v, OP_Integer, j-1, iReg+1);
    sqlite3VdbeAddOp4(v, OP_VFilter, iCur, addrNotFound, iReg, pVtabIdx->idxStr,

                      pVtabIdx->needToFreeIdxStr ? P4_MPRINTF : P4_STATIC);
    pVtabIdx->needToFreeIdxStr = 0;

    for(j=0; j<nConstraint; j++){
      if( aUsage[j].omit ){
        int iTerm = aConstraint[j].iTermOffset;

        disableTerm(pLevel, &pWC->a[iTerm]);
      }
    }
    pLevel->op = OP_VNext;
    pLevel->p1 = iCur;
    pLevel->p2 = sqlite3VdbeCurrentAddr(v);
    sqlite3ReleaseTempRange(pParse, iReg, nConstraint+2);
    sqlite3ExprCachePop(pParse, 1);
  }else
#endif /* SQLITE_OMIT_VIRTUALTABLE */

  if( pLevel->plan.wsFlags & WHERE_ROWID_EQ ){


    /* Case 1:  We can directly reference a single row using an
    **          equality comparison against the ROWID field.  Or
    **          we reference multiple rows using a "rowid IN (...)"
    **          construct.
    */

    iReleaseReg = sqlite3GetTempReg(pParse);
    pTerm = findTerm(pWC, iCur, -1, notReady, WO_EQ|WO_IN, 0);

    assert( pTerm!=0 );
    assert( pTerm->pExpr!=0 );
    assert( omitTable==0 );
    testcase( pTerm->wtFlags & TERM_VIRTUAL ); /* EV: R-30575-11662 */
    iRowidReg = codeEqualityTerm(pParse, pTerm, pLevel, 0, iReleaseReg);
    addrNxt = pLevel->addrNxt;
    sqlite3VdbeAddOp2(v, OP_MustBeInt, iRowidReg, addrNxt);
    sqlite3VdbeAddOp3(v, OP_NotExists, iCur, addrNxt, iRowidReg);
    sqlite3ExprCacheAffinityChange(pParse, iRowidReg, 1);
    sqlite3ExprCacheStore(pParse, iCur, -1, iRowidReg);
    VdbeComment((v, "pk"));
    pLevel->op = OP_Noop;
  }else if( pLevel->plan.wsFlags & WHERE_ROWID_RANGE ){


    /* Case 2:  We have an inequality comparison against the ROWID field.
    */
    int testOp = OP_Noop;
    int start;
    int memEndValue = 0;
    WhereTerm *pStart, *pEnd;

    assert( omitTable==0 );
    pStart = findTerm(pWC, iCur, -1, notReady, WO_GT|WO_GE, 0);
    pEnd = findTerm(pWC, iCur, -1, notReady, WO_LT|WO_LE, 0);



    if( bRev ){
      pTerm = pStart;
      pStart = pEnd;
      pEnd = pTerm;
    }
    if( pStart ){
      Expr *pX;             /* The expression that defines the start bound */
................................................................................
           /* TK_LT */  OP_SeekLt,
           /* TK_GE */  OP_SeekGe
      };
      assert( TK_LE==TK_GT+1 );      /* Make sure the ordering.. */
      assert( TK_LT==TK_GT+2 );      /*  ... of the TK_xx values... */
      assert( TK_GE==TK_GT+3 );      /*  ... is correcct. */


      testcase( pStart->wtFlags & TERM_VIRTUAL ); /* EV: R-30575-11662 */
      pX = pStart->pExpr;
      assert( pX!=0 );
      assert( pStart->leftCursor==iCur );
      r1 = sqlite3ExprCodeTemp(pParse, pX->pRight, &rTemp);
      sqlite3VdbeAddOp3(v, aMoveOp[pX->op-TK_GT], iCur, addrBrk, r1);
      VdbeComment((v, "pk"));
      sqlite3ExprCacheAffinityChange(pParse, r1, 1);
      sqlite3ReleaseTempReg(pParse, rTemp);
      disableTerm(pLevel, pStart);
    }else{
      sqlite3VdbeAddOp2(v, bRev ? OP_Last : OP_Rewind, iCur, addrBrk);
    }
    if( pEnd ){
      Expr *pX;
      pX = pEnd->pExpr;
      assert( pX!=0 );

      assert( pEnd->leftCursor==iCur );
      testcase( pEnd->wtFlags & TERM_VIRTUAL ); /* EV: R-30575-11662 */
      memEndValue = ++pParse->nMem;
      sqlite3ExprCode(pParse, pX->pRight, memEndValue);
      if( pX->op==TK_LT || pX->op==TK_GT ){
        testOp = bRev ? OP_Le : OP_Ge;
      }else{
        testOp = bRev ? OP_Lt : OP_Gt;
      }
      disableTerm(pLevel, pEnd);
    }
    start = sqlite3VdbeCurrentAddr(v);
    pLevel->op = bRev ? OP_Prev : OP_Next;
    pLevel->p1 = iCur;
    pLevel->p2 = start;
    if( pStart==0 && pEnd==0 ){
      pLevel->p5 = SQLITE_STMTSTATUS_FULLSCAN_STEP;
    }else{
      assert( pLevel->p5==0 );
    }
    if( testOp!=OP_Noop ){
      iRowidReg = iReleaseReg = sqlite3GetTempReg(pParse);
      sqlite3VdbeAddOp2(v, OP_Rowid, iCur, iRowidReg);
      sqlite3ExprCacheStore(pParse, iCur, -1, iRowidReg);
      sqlite3VdbeAddOp3(v, testOp, memEndValue, addrBrk, iRowidReg);
      sqlite3VdbeChangeP5(v, SQLITE_AFF_NUMERIC | SQLITE_JUMPIFNULL);
    }
  }else if( pLevel->plan.wsFlags & (WHERE_COLUMN_RANGE|WHERE_COLUMN_EQ) ){
    /* Case 3: A scan using an index.
    **
    **         The WHERE clause may contain zero or more equality 
    **         terms ("==" or "IN" operators) that refer to the N
    **         left-most columns of the index. It may also contain
    **         inequality constraints (>, <, >= or <=) on the indexed
    **         column that immediately follows the N equalities. Only 
    **         the right-most column can be an inequality - the rest must
................................................................................
      OP_SeekLe            /* 7: (start_constraints  &&  startEq &&  bRev) */
    };
    static const u8 aEndOp[] = {
      OP_Noop,             /* 0: (!end_constraints) */
      OP_IdxGE,            /* 1: (end_constraints && !bRev) */
      OP_IdxLT             /* 2: (end_constraints && bRev) */
    };
    int nEq = pLevel->plan.nEq;  /* Number of == or IN terms */
    int isMinQuery = 0;          /* If this is an optimized SELECT min(x).. */
    int regBase;                 /* Base register holding constraint values */
    int r1;                      /* Temp register */
    WhereTerm *pRangeStart = 0;  /* Inequality constraint at range start */
    WhereTerm *pRangeEnd = 0;    /* Inequality constraint at range end */
    int startEq;                 /* True if range start uses ==, >= or <= */
    int endEq;                   /* True if range end uses ==, >= or <= */
    int start_constraints;       /* Start of range is constrained */
................................................................................
    Index *pIdx;                 /* The index we will be using */
    int iIdxCur;                 /* The VDBE cursor for the index */
    int nExtraReg = 0;           /* Number of extra registers needed */
    int op;                      /* Instruction opcode */
    char *zStartAff;             /* Affinity for start of range constraint */
    char *zEndAff;               /* Affinity for end of range constraint */

    pIdx = pLevel->plan.u.pIdx;
    iIdxCur = pLevel->iIdxCur;
    k = (nEq==pIdx->nColumn ? -1 : pIdx->aiColumn[nEq]);

    /* If this loop satisfies a sort order (pOrderBy) request that 
    ** was passed to this function to implement a "SELECT min(x) ..." 
    ** query, then the caller will only allow the loop to run for
    ** a single iteration. This means that the first row returned
    ** should not have a NULL value stored in 'x'. If column 'x' is
    ** the first one after the nEq equality constraints in the index,
    ** this requires some special handling.
    */
    if( (wctrlFlags&WHERE_ORDERBY_MIN)!=0
     && (pLevel->plan.wsFlags&WHERE_ORDERED)
     && (pIdx->nColumn>nEq)
    ){
      /* assert( pOrderBy->nExpr==1 ); */
      /* assert( pOrderBy->a[0].pExpr->iColumn==pIdx->aiColumn[nEq] ); */
      isMinQuery = 1;
      nExtraReg = 1;
    }

    /* Find any inequality constraint terms for the start and end 
    ** of the range. 
    */
    if( pLevel->plan.wsFlags & WHERE_TOP_LIMIT ){
      pRangeEnd = findTerm(pWC, iCur, k, notReady, (WO_LT|WO_LE), pIdx);
      nExtraReg = 1;
    }
    if( pLevel->plan.wsFlags & WHERE_BTM_LIMIT ){
      pRangeStart = findTerm(pWC, iCur, k, notReady, (WO_GT|WO_GE), pIdx);

      nExtraReg = 1;
    }

    /* Generate code to evaluate all constraint terms using == or IN
    ** and store the values of those terms in an array of registers
    ** starting at regBase.
    */
    regBase = codeAllEqualityTerms(
        pParse, pLevel, pWC, notReady, nExtraReg, &zStartAff
    );
    zEndAff = sqlite3DbStrDup(pParse->db, zStartAff);
    addrNxt = pLevel->addrNxt;

    /* If we are doing a reverse order scan on an ascending index, or
    ** a forward order scan on a descending index, interchange the 
    ** start and end terms (pRangeStart and pRangeEnd).
    */
    if( (nEq<pIdx->nColumn && bRev==(pIdx->aSortOrder[nEq]==SQLITE_SO_ASC))
     || (bRev && pIdx->nColumn==nEq)
    ){
      SWAP(WhereTerm *, pRangeEnd, pRangeStart);
    }

    testcase( pRangeStart && pRangeStart->eOperator & WO_LE );
    testcase( pRangeStart && pRangeStart->eOperator & WO_GE );
    testcase( pRangeEnd && pRangeEnd->eOperator & WO_LE );
    testcase( pRangeEnd && pRangeEnd->eOperator & WO_GE );
    startEq = !pRangeStart || pRangeStart->eOperator & (WO_LE|WO_GE);
    endEq =   !pRangeEnd || pRangeEnd->eOperator & (WO_LE|WO_GE);
    start_constraints = pRangeStart || nEq>0;

    /* Seek the index cursor to the start of the range. */
    nConstraint = nEq;
    if( pRangeStart ){
................................................................................
          zStartAff[nEq] = SQLITE_AFF_NONE;
        }
        if( sqlite3ExprNeedsNoAffinityChange(pRight, zStartAff[nEq]) ){
          zStartAff[nEq] = SQLITE_AFF_NONE;
        }
      }  
      nConstraint++;
      testcase( pRangeStart->wtFlags & TERM_VIRTUAL ); /* EV: R-30575-11662 */
    }else if( isMinQuery ){
      sqlite3VdbeAddOp2(v, OP_Null, 0, regBase+nEq);
      nConstraint++;
      startEq = 0;
      start_constraints = 1;
    }
    codeApplyAffinity(pParse, regBase, nConstraint, zStartAff);
................................................................................
        }
        if( sqlite3ExprNeedsNoAffinityChange(pRight, zEndAff[nEq]) ){
          zEndAff[nEq] = SQLITE_AFF_NONE;
        }
      }  
      codeApplyAffinity(pParse, regBase, nEq+1, zEndAff);
      nConstraint++;
      testcase( pRangeEnd->wtFlags & TERM_VIRTUAL ); /* EV: R-30575-11662 */
    }
    sqlite3DbFree(pParse->db, zStartAff);
    sqlite3DbFree(pParse->db, zEndAff);

    /* Top of the loop body */
    pLevel->p2 = sqlite3VdbeCurrentAddr(v);

    /* Check if the index cursor is past the end of the range. */
    op = aEndOp[(pRangeEnd || nEq) * (1 + bRev)];
    testcase( op==OP_Noop );
................................................................................
    }

    /* If there are inequality constraints, check that the value
    ** of the table column that the inequality contrains is not NULL.
    ** If it is, jump to the next iteration of the loop.
    */
    r1 = sqlite3GetTempReg(pParse);
    testcase( pLevel->plan.wsFlags & WHERE_BTM_LIMIT );
    testcase( pLevel->plan.wsFlags & WHERE_TOP_LIMIT );
    if( (pLevel->plan.wsFlags & (WHERE_BTM_LIMIT|WHERE_TOP_LIMIT))!=0 ){
      sqlite3VdbeAddOp3(v, OP_Column, iIdxCur, nEq, r1);
      sqlite3VdbeAddOp2(v, OP_IsNull, r1, addrCont);
    }
    sqlite3ReleaseTempReg(pParse, r1);

    /* Seek the table cursor, if required */
    disableTerm(pLevel, pRangeStart);
................................................................................
      sqlite3ExprCacheStore(pParse, iCur, -1, iRowidReg);
      sqlite3VdbeAddOp2(v, OP_Seek, iCur, iRowidReg);  /* Deferred seek */
    }

    /* Record the instruction used to terminate the loop. Disable 
    ** WHERE clause terms made redundant by the index range scan.
    */
    if( pLevel->plan.wsFlags & WHERE_UNIQUE ){
      pLevel->op = OP_Noop;
    }else if( bRev ){
      pLevel->op = OP_Prev;
    }else{
      pLevel->op = OP_Next;
    }
    pLevel->p1 = iIdxCur;
    if( pLevel->plan.wsFlags & WHERE_COVER_SCAN ){
      pLevel->p5 = SQLITE_STMTSTATUS_FULLSCAN_STEP;
    }else{
      assert( pLevel->p5==0 );
    }
  }else

#ifndef SQLITE_OMIT_OR_OPTIMIZATION
  if( pLevel->plan.wsFlags & WHERE_MULTI_OR ){
    /* Case 4:  Two or more separately indexed terms connected by OR
    **
    ** Example:
    **
    **   CREATE TABLE t1(a,b,c,d);
    **   CREATE INDEX i1 ON t1(a);
    **   CREATE INDEX i2 ON t1(b);
    **   CREATE INDEX i3 ON t1(c);
................................................................................
    int regRowid = 0;                         /* Register holding rowid */
    int iLoopBody = sqlite3VdbeMakeLabel(v);  /* Start of loop body */
    int iRetInit;                             /* Address of regReturn init */
    int untestedTerms = 0;             /* Some terms not completely tested */
    int ii;                            /* Loop counter */
    Expr *pAndExpr = 0;                /* An ".. AND (...)" expression */
   
    pTerm = pLevel->plan.u.pTerm;
    assert( pTerm!=0 );
    assert( pTerm->eOperator & WO_OR );
    assert( (pTerm->wtFlags & TERM_ORINFO)!=0 );
    pOrWc = &pTerm->u.pOrInfo->wc;
    pLevel->op = OP_Return;
    pLevel->p1 = regReturn;

................................................................................
    ** by this loop in the a[0] slot and all notReady tables in a[1..] slots.
    ** This becomes the SrcList in the recursive call to sqlite3WhereBegin().
    */
    if( pWInfo->nLevel>1 ){
      int nNotReady;                 /* The number of notReady tables */
      struct SrcList_item *origSrc;     /* Original list of tables */
      nNotReady = pWInfo->nLevel - iLevel - 1;
      pOrTab = sqlite3StackAllocRaw(pParse->db,
                            sizeof(*pOrTab)+ nNotReady*sizeof(pOrTab->a[0]));
      if( pOrTab==0 ) return notReady;
      pOrTab->nAlloc = (i16)(nNotReady + 1);
      pOrTab->nSrc = pOrTab->nAlloc;
      memcpy(pOrTab->a, pTabItem, sizeof(*pTabItem));
      origSrc = pWInfo->pTabList->a;
      for(k=1; k<=nNotReady; k++){
        memcpy(&pOrTab->a[k], &origSrc[pLevel[k].iFrom], sizeof(pOrTab->a[k]));
      }
    }else{
................................................................................
    ** immediately following the OP_Return at the bottom of the loop. This
    ** is required in a few obscure LEFT JOIN cases where control jumps
    ** over the top of the loop into the body of it. In this case the 
    ** correct response for the end-of-loop code (the OP_Return) is to 
    ** fall through to the next instruction, just as an OP_Next does if
    ** called on an uninitialized cursor.
    */
    if( (wctrlFlags & WHERE_DUPLICATES_OK)==0 ){
      regRowset = ++pParse->nMem;
      regRowid = ++pParse->nMem;
      sqlite3VdbeAddOp2(v, OP_Null, 0, regRowset);
    }
    iRetInit = sqlite3VdbeAddOp2(v, OP_Integer, 0, regReturn);

    /* If the original WHERE clause is z of the form:  (x1 OR x2 OR ...) AND y
................................................................................
    ** is not contained in the ON clause of a LEFT JOIN.
    ** See ticket http://www.sqlite.org/src/info/f2369304e4
    */
    if( pWC->nTerm>1 ){
      int iTerm;
      for(iTerm=0; iTerm<pWC->nTerm; iTerm++){
        Expr *pExpr = pWC->a[iTerm].pExpr;

        if( ExprHasProperty(pExpr, EP_FromJoin) ) continue;
        if( pWC->a[iTerm].wtFlags & (TERM_VIRTUAL|TERM_ORINFO) ) continue;
        if( (pWC->a[iTerm].eOperator & WO_ALL)==0 ) continue;
        pExpr = sqlite3ExprDup(pParse->db, pExpr, 0);
        pAndExpr = sqlite3ExprAnd(pParse->db, pAndExpr, pExpr);
      }
      if( pAndExpr ){
        pAndExpr = sqlite3PExpr(pParse, TK_AND, 0, pAndExpr, 0);
      }
    }

    for(ii=0; ii<pOrWc->nTerm; ii++){
................................................................................
          pAndExpr->pLeft = pOrExpr;
          pOrExpr = pAndExpr;
        }
        /* Loop through table entries that match term pOrTerm. */
        pSubWInfo = sqlite3WhereBegin(pParse, pOrTab, pOrExpr, 0, 0,
                        WHERE_OMIT_OPEN_CLOSE | WHERE_AND_ONLY |
                        WHERE_FORCE_TABLE | WHERE_ONETABLE_ONLY, iCovCur);
        assert( pSubWInfo || pParse->nErr || pParse->db->mallocFailed );
        if( pSubWInfo ){
          WhereLevel *pLvl;
          explainOneScan(
              pParse, pOrTab, &pSubWInfo->a[0], iLevel, pLevel->iFrom, 0
          );
          if( (wctrlFlags & WHERE_DUPLICATES_OK)==0 ){
            int iSet = ((ii==pOrWc->nTerm-1)?-1:ii);
            int r;
            r = sqlite3ExprCodeGetColumn(pParse, pTabItem->pTab, -1, iCur, 
                                         regRowid, 0);
            sqlite3VdbeAddOp4Int(v, OP_RowSetTest, regRowset,
                                 sqlite3VdbeCurrentAddr(v)+2, r, iSet);
          }
................................................................................
          ** If the call to sqlite3WhereBegin() above resulted in a scan that
          ** uses an index, and this is either the first OR-connected term
          ** processed or the index is the same as that used by all previous
          ** terms, set pCov to the candidate covering index. Otherwise, set 
          ** pCov to NULL to indicate that no candidate covering index will 
          ** be available.
          */
          pLvl = &pSubWInfo->a[0];
          if( (pLvl->plan.wsFlags & WHERE_INDEXED)!=0
           && (pLvl->plan.wsFlags & WHERE_TEMP_INDEX)==0
           && (ii==0 || pLvl->plan.u.pIdx==pCov)
          ){
            assert( pLvl->iIdxCur==iCovCur );
            pCov = pLvl->plan.u.pIdx;
          }else{
            pCov = 0;
          }

          /* Finish the loop through table entries that match term pOrTerm. */
          sqlite3WhereEnd(pSubWInfo);
        }
      }
    }
    pLevel->u.pCovidx = pCov;
    if( pCov ) pLevel->iIdxCur = iCovCur;
    if( pAndExpr ){
      pAndExpr->pLeft = 0;
      sqlite3ExprDelete(pParse->db, pAndExpr);
    }
    sqlite3VdbeChangeP1(v, iRetInit, sqlite3VdbeCurrentAddr(v));
    sqlite3VdbeAddOp2(v, OP_Goto, 0, pLevel->addrBrk);
    sqlite3VdbeResolveLabel(v, iLoopBody);

    if( pWInfo->nLevel>1 ) sqlite3StackFree(pParse->db, pOrTab);
    if( !untestedTerms ) disableTerm(pLevel, pTerm);
  }else
#endif /* SQLITE_OMIT_OR_OPTIMIZATION */

  {
    /* Case 5:  There is no usable index.  We must do a complete
    **          scan of the entire table.
    */
    static const u8 aStep[] = { OP_Next, OP_Prev };
    static const u8 aStart[] = { OP_Rewind, OP_Last };
    assert( bRev==0 || bRev==1 );
    assert( omitTable==0 );
    pLevel->op = aStep[bRev];
    pLevel->p1 = iCur;
    pLevel->p2 = 1 + sqlite3VdbeAddOp2(v, aStart[bRev], iCur, addrBrk);
    pLevel->p5 = SQLITE_STMTSTATUS_FULLSCAN_STEP;
  }
  newNotReady = notReady & ~getMask(pWC->pMaskSet, iCur);

  /* Insert code to test every subexpression that can be completely
  ** computed using the current set of tables.
  **
  ** IMPLEMENTATION-OF: R-49525-50935 Terms that cannot be satisfied through
  ** the use of indices become tests that are evaluated against each row of
  ** the relevant input tables.
  */
  for(pTerm=pWC->a, j=pWC->nTerm; j>0; j--, pTerm++){
    Expr *pE;
    testcase( pTerm->wtFlags & TERM_VIRTUAL ); /* IMP: R-30575-11662 */
    testcase( pTerm->wtFlags & TERM_CODED );
    if( pTerm->wtFlags & (TERM_VIRTUAL|TERM_CODED) ) continue;
    if( (pTerm->prereqAll & newNotReady)!=0 ){
      testcase( pWInfo->untestedTerms==0
               && (pWInfo->wctrlFlags & WHERE_ONETABLE_ONLY)!=0 );
      pWInfo->untestedTerms = 1;
      continue;
................................................................................
  **
  ** Example: If the WHERE clause contains "t1.a=t2.b" and "t2.b=123"
  ** and we are coding the t1 loop and the t2 loop has not yet coded,
  ** then we cannot use the "t1.a=t2.b" constraint, but we can code
  ** the implied "t1.a=123" constraint.
  */
  for(pTerm=pWC->a, j=pWC->nTerm; j>0; j--, pTerm++){
    Expr *pE;
    WhereTerm *pAlt;
    Expr sEq;
    if( pTerm->wtFlags & (TERM_VIRTUAL|TERM_CODED) ) continue;
    if( pTerm->eOperator!=(WO_EQUIV|WO_EQ) ) continue;
    if( pTerm->leftCursor!=iCur ) continue;

    pE = pTerm->pExpr;
    assert( !ExprHasProperty(pE, EP_FromJoin) );
    assert( (pTerm->prereqRight & newNotReady)!=0 );
    pAlt = findTerm(pWC, iCur, pTerm->u.leftColumn, notReady, WO_EQ|WO_IN, 0);
    if( pAlt==0 ) continue;
    if( pAlt->wtFlags & (TERM_CODED) ) continue;


    VdbeNoopComment((v, "begin transitive constraint"));


    sEq = *pAlt->pExpr;
    sEq.pLeft = pE->pLeft;
    sqlite3ExprIfFalse(pParse, &sEq, addrCont, SQLITE_JUMPIFNULL);


  }

  /* For a LEFT OUTER JOIN, generate code that will record the fact that
  ** at least one row of the right table has matched the left table.  
  */
  if( pLevel->iLeftJoin ){
    pLevel->addrFirst = sqlite3VdbeCurrentAddr(v);
    sqlite3VdbeAddOp2(v, OP_Integer, 1, pLevel->iLeftJoin);
    VdbeComment((v, "record LEFT JOIN hit"));
    sqlite3ExprCacheClear(pParse);
    for(pTerm=pWC->a, j=0; j<pWC->nTerm; j++, pTerm++){
      testcase( pTerm->wtFlags & TERM_VIRTUAL );  /* IMP: R-30575-11662 */
      testcase( pTerm->wtFlags & TERM_CODED );
      if( pTerm->wtFlags & (TERM_VIRTUAL|TERM_CODED) ) continue;
      if( (pTerm->prereqAll & newNotReady)!=0 ){
        assert( pWInfo->untestedTerms );
        continue;
      }
      assert( pTerm->pExpr );
................................................................................
    }
  }
  sqlite3ReleaseTempReg(pParse, iReleaseReg);

  return newNotReady;
}

#if defined(SQLITE_TEST)
/*
** The following variable holds a text description of query plan generated
** by the most recent call to sqlite3WhereBegin().  Each call to WhereBegin
** overwrites the previous.  This information is used for testing and
** analysis only.






































*/
SQLITE_API char sqlite3_query_plan[BMS*2*40];  /* Text of the join */
static int nQPlan = 0;              /* Next free slow in _query_plan[] */














































#endif /* SQLITE_TEST */


/*
























** Free a WhereInfo structure
*/
static void whereInfoFree(sqlite3 *db, WhereInfo *pWInfo){
  if( ALWAYS(pWInfo) ){



























































































































































































































































































































































































    int i;
    for(i=0; i<pWInfo->nLevel; i++){





























































































































































































      sqlite3_index_info *pInfo = pWInfo->a[i].pIdxInfo;
      if( pInfo ){










































































        /* assert( pInfo->needToFreeIdxStr==0 || db->mallocFailed ); */























































        if( pInfo->needToFreeIdxStr ){









          sqlite3_free(pInfo->idxStr);

        }





        sqlite3DbFree(db, pInfo);

      }







































































































































































































































































      if( pWInfo->a[i].plan.wsFlags & WHERE_TEMP_INDEX ){
        Index *pIdx = pWInfo->a[i].plan.u.pIdx;








































        if( pIdx ){
          sqlite3DbFree(db, pIdx->zColAff);



























































































































































































































































































































          sqlite3DbFree(db, pIdx);

        }
      }






    }
    whereClauseClear(pWInfo->pWC);






























    sqlite3DbFree(db, pWInfo);

  }
}

















































































/*
** Generate the beginning of the loop used for WHERE clause processing.
** The return value is a pointer to an opaque structure that contains
** information needed to terminate the loop.  Later, the calling routine
** should invoke sqlite3WhereEnd() with the return value of this function
** in order to complete the WHERE clause processing.
................................................................................
**        move the row2 cursor to a null row
**        goto start
**      fi
**    end
**
** ORDER BY CLAUSE PROCESSING
**
** pOrderBy is a pointer to the ORDER BY clause of a SELECT statement,

** if there is one.  If there is no ORDER BY clause or if this routine
** is called from an UPDATE or DELETE statement, then pOrderBy is NULL.
**
** If an index can be used so that the natural output order of the table
** scan is correct for the ORDER BY clause, then that index is used and
** the returned WhereInfo.nOBSat field is set to pOrderBy->nExpr.  This
** is an optimization that prevents an unnecessary sort of the result set
** if an index appropriate for the ORDER BY clause already exists.
**
** If the where clause loops cannot be arranged to provide the correct
** output order, then WhereInfo.nOBSat is 0.
*/
SQLITE_PRIVATE WhereInfo *sqlite3WhereBegin(
  Parse *pParse,        /* The parser context */
  SrcList *pTabList,    /* A list of all tables to be scanned */
  Expr *pWhere,         /* The WHERE clause */
  ExprList *pOrderBy,   /* An ORDER BY clause, or NULL */
  ExprList *pDistinct,  /* The select-list for DISTINCT queries - or NULL */
  u16 wctrlFlags,       /* One of the WHERE_* flags defined in sqliteInt.h */
  int iIdxCur           /* If WHERE_ONETABLE_ONLY is set, index cursor number */
){
  int nByteWInfo;            /* Num. bytes allocated for WhereInfo struct */
  int nTabList;              /* Number of elements in pTabList */
  WhereInfo *pWInfo;         /* Will become the return value of this function */
  Vdbe *v = pParse->pVdbe;   /* The virtual database engine */
  Bitmask notReady;          /* Cursors that are not yet positioned */
  WhereBestIdx sWBI;         /* Best index search context */
  WhereMaskSet *pMaskSet;    /* The expression mask set */
  WhereLevel *pLevel;        /* A single level in pWInfo->a[] */
  int iFrom;                 /* First unused FROM clause element */
  int andFlags;              /* AND-ed combination of all pWC->a[].wtFlags */
  int ii;                    /* Loop counter */
  sqlite3 *db;               /* Database connection */



  /* Variable initialization */
  memset(&sWBI, 0, sizeof(sWBI));
  sWBI.pParse = pParse;









  /* The number of tables in the FROM clause is limited by the number of
  ** bits in a Bitmask 
  */
  testcase( pTabList->nSrc==BMS );
  if( pTabList->nSrc>BMS ){
    sqlite3ErrorMsg(pParse, "at most %d tables in a join", BMS);
................................................................................
  /* Allocate and initialize the WhereInfo structure that will become the
  ** return value. A single allocation is used to store the WhereInfo
  ** struct, the contents of WhereInfo.a[], the WhereClause structure
  ** and the WhereMaskSet structure. Since WhereClause contains an 8-byte
  ** field (type Bitmask) it must be aligned on an 8-byte boundary on
  ** some architectures. Hence the ROUND8() below.
  */
  db = pParse->db;
  nByteWInfo = ROUND8(sizeof(WhereInfo)+(nTabList-1)*sizeof(WhereLevel));
  pWInfo = sqlite3DbMallocZero(db, 
      nByteWInfo + 
      sizeof(WhereClause) +
      sizeof(WhereMaskSet)
  );
  if( db->mallocFailed ){
    sqlite3DbFree(db, pWInfo);
    pWInfo = 0;
    goto whereBeginError;
  }
  pWInfo->nLevel = nTabList;
  pWInfo->pParse = pParse;
  pWInfo->pTabList = pTabList;


  pWInfo->iBreak = sqlite3VdbeMakeLabel(v);
  pWInfo->pWC = sWBI.pWC = (WhereClause *)&((u8 *)pWInfo)[nByteWInfo];
  pWInfo->wctrlFlags = wctrlFlags;
  pWInfo->savedNQueryLoop = pParse->nQueryLoop;
  pMaskSet = (WhereMaskSet*)&sWBI.pWC[1];

  sWBI.aLevel = pWInfo->a;

  /* Disable the DISTINCT optimization if SQLITE_DistinctOpt is set via
  ** sqlite3_test_ctrl(SQLITE_TESTCTRL_OPTIMIZATIONS,...) */
  if( OptimizationDisabled(db, SQLITE_DistinctOpt) ) pDistinct = 0;





  /* Split the WHERE clause into separate subexpressions where each
  ** subexpression is separated by an AND operator.
  */
  initMaskSet(pMaskSet);
  whereClauseInit(sWBI.pWC, pParse, pMaskSet, wctrlFlags);
  sqlite3ExprCodeConstants(pParse, pWhere);
  whereSplit(sWBI.pWC, pWhere, TK_AND);   /* IMP: R-15842-53296 */

    
  /* Special case: a WHERE clause that is constant.  Evaluate the
  ** expression and either jump over all of the code or fall thru.
  */
  if( pWhere && (nTabList==0 || sqlite3ExprIsConstantNotJoin(pWhere)) ){
    sqlite3ExprIfFalse(pParse, pWhere, pWInfo->iBreak, SQLITE_JUMPIFNULL);
    pWhere = 0;
  }










  /* Assign a bit from the bitmask to every term in the FROM clause.
  **
  ** When assigning bitmask values to FROM clause cursors, it must be
  ** the case that if X is the bitmask for the N-th FROM clause term then
  ** the bitmask for all FROM clause terms to the left of the N-th term
  ** is (X-1).   An expression from the ON clause of a LEFT JOIN can use
................................................................................
#endif

  /* Analyze all of the subexpressions.  Note that exprAnalyze() might
  ** add new virtual terms onto the end of the WHERE clause.  We do not
  ** want to analyze these virtual terms, so start analyzing at the end
  ** and work forward so that the added virtual terms are never processed.
  */
  exprAnalyzeAll(pTabList, sWBI.pWC);
  if( db->mallocFailed ){
    goto whereBeginError;
  }

  /* Check if the DISTINCT qualifier, if there is one, is redundant. 
  ** If it is, then set pDistinct to NULL and WhereInfo.eDistinct to
  ** WHERE_DISTINCT_UNIQUE to tell the caller to ignore the DISTINCT.
  */
  if( pDistinct && isDistinctRedundant(pParse, pTabList, sWBI.pWC, pDistinct) ){
    pDistinct = 0;
    pWInfo->eDistinct = WHERE_DISTINCT_UNIQUE;
  }

  /* Chose the best index to use for each table in the FROM clause.
  **
  ** This loop fills in the following fields:
  **
  **   pWInfo->a[].pIdx      The index to use for this level of the loop.
  **   pWInfo->a[].wsFlags   WHERE_xxx flags associated with pIdx
  **   pWInfo->a[].nEq       The number of == and IN constraints
  **   pWInfo->a[].iFrom     Which term of the FROM clause is being coded
  **   pWInfo->a[].iTabCur   The VDBE cursor for the database table
  **   pWInfo->a[].iIdxCur   The VDBE cursor for the index
  **   pWInfo->a[].pTerm     When wsFlags==WO_OR, the OR-clause term
  **
  ** This loop also figures out the nesting order of tables in the FROM
  ** clause.
  */
  sWBI.notValid = ~(Bitmask)0;

  sWBI.pOrderBy = pOrderBy;
  sWBI.n = nTabList;
  sWBI.pDistinct = pDistinct;
  andFlags = ~0;
  WHERETRACE(("*** Optimizer Start ***\n"));
  for(sWBI.i=iFrom=0, pLevel=pWInfo->a; sWBI.i<nTabList; sWBI.i++, pLevel++){
    WhereCost bestPlan;         /* Most efficient plan seen so far */
    Index *pIdx;                /* Index for FROM table at pTabItem */
    int j;                      /* For looping over FROM tables */
    int bestJ = -1;             /* The value of j */
    Bitmask m;                  /* Bitmask value for j or bestJ */
    int isOptimal;              /* Iterator for optimal/non-optimal search */
    int ckOptimal;              /* Do the optimal scan check */
    int nUnconstrained;         /* Number tables without INDEXED BY */
    Bitmask notIndexed;         /* Mask of tables that cannot use an index */




    memset(&bestPlan, 0, sizeof(bestPlan));
    bestPlan.rCost = SQLITE_BIG_DBL;
    WHERETRACE(("*** Begin search for loop %d ***\n", sWBI.i));

    /* Loop through the remaining entries in the FROM clause to find the
    ** next nested loop. The loop tests all FROM clause entries
    ** either once or twice. 
    **
    ** The first test is always performed if there are two or more entries
    ** remaining and never performed if there is only one FROM clause entry
    ** to choose from.  The first test looks for an "optimal" scan.  In
    ** this context an optimal scan is one that uses the same strategy
    ** for the given FROM clause entry as would be selected if the entry
    ** were used as the innermost nested loop.  In other words, a table
    ** is chosen such that the cost of running that table cannot be reduced
    ** by waiting for other tables to run first.  This "optimal" test works
    ** by first assuming that the FROM clause is on the inner loop and finding
    ** its query plan, then checking to see if that query plan uses any
    ** other FROM clause terms that are sWBI.notValid.  If no notValid terms
    ** are used then the "optimal" query plan works.
    **
    ** Note that the WhereCost.nRow parameter for an optimal scan might
    ** not be as small as it would be if the table really were the innermost
    ** join.  The nRow value can be reduced by WHERE clause constraints
    ** that do not use indices.  But this nRow reduction only happens if the
    ** table really is the innermost join.  
    **
    ** The second loop iteration is only performed if no optimal scan
    ** strategies were found by the first iteration. This second iteration
    ** is used to search for the lowest cost scan overall.
    **
    ** Without the optimal scan step (the first iteration) a suboptimal
    ** plan might be chosen for queries like this:
    **   
    **   CREATE TABLE t1(a, b); 
    **   CREATE TABLE t2(c, d);
    **   SELECT * FROM t2, t1 WHERE t2.rowid = t1.a;
    **
    ** The best strategy is to iterate through table t1 first. However it
    ** is not possible to determine this with a simple greedy algorithm.
    ** Since the cost of a linear scan through table t2 is the same 
    ** as the cost of a linear scan through table t1, a simple greedy 
    ** algorithm may choose to use t2 for the outer loop, which is a much
    ** costlier approach.
    */
    nUnconstrained = 0;
    notIndexed = 0;

    /* The optimal scan check only occurs if there are two or more tables
    ** available to be reordered */
    if( iFrom==nTabList-1 ){
      ckOptimal = 0;  /* Common case of just one table in the FROM clause */
    }else{
      ckOptimal = -1;
      for(j=iFrom, sWBI.pSrc=&pTabList->a[j]; j<nTabList; j++, sWBI.pSrc++){
        m = getMask(pMaskSet, sWBI.pSrc->iCursor);
        if( (m & sWBI.notValid)==0 ){
          if( j==iFrom ) iFrom++;
          continue;
        }
        if( j>iFrom && (sWBI.pSrc->jointype & (JT_LEFT|JT_CROSS))!=0 ) break;
        if( ++ckOptimal ) break;
        if( (sWBI.pSrc->jointype & JT_LEFT)!=0 ) break;








      }
    }
    assert( ckOptimal==0 || ckOptimal==1 );

    for(isOptimal=ckOptimal; isOptimal>=0 && bestJ<0; isOptimal--){
      for(j=iFrom, sWBI.pSrc=&pTabList->a[j]; j<nTabList; j++, sWBI.pSrc++){
        if( j>iFrom && (sWBI.pSrc->jointype & (JT_LEFT|JT_CROSS))!=0 ){
          /* This break and one like it in the ckOptimal computation loop
          ** above prevent table reordering across LEFT and CROSS JOINs.
          ** The LEFT JOIN case is necessary for correctness.  The prohibition
          ** against reordering across a CROSS JOIN is an SQLite feature that
          ** allows the developer to control table reordering */
          break;





        }
        m = getMask(pMaskSet, sWBI.pSrc->iCursor);
        if( (m & sWBI.notValid)==0 ){
          assert( j>iFrom );
          continue;










        }
        sWBI.notReady = (isOptimal ? m : sWBI.notValid);
        if( sWBI.pSrc->pIndex==0 ) nUnconstrained++;
  
        WHERETRACE(("   === trying table %d (%s) with isOptimal=%d ===\n",
                    j, sWBI.pSrc->pTab->zName, isOptimal));
        assert( sWBI.pSrc->pTab );
#ifndef SQLITE_OMIT_VIRTUALTABLE
        if( IsVirtual(sWBI.pSrc->pTab) ){
          sWBI.ppIdxInfo = &pWInfo->a[j].pIdxInfo;
          bestVirtualIndex(&sWBI);
        }else 
#endif
        {
          bestBtreeIndex(&sWBI);





        }
        assert( isOptimal || (sWBI.cost.used&sWBI.notValid)==0 );

        /* If an INDEXED BY clause is present, then the plan must use that
        ** index if it uses any index at all */
        assert( sWBI.pSrc->pIndex==0 
                  || (sWBI.cost.plan.wsFlags & WHERE_NOT_FULLSCAN)==0
                  || sWBI.cost.plan.u.pIdx==sWBI.pSrc->pIndex );



        if( isOptimal && (sWBI.cost.plan.wsFlags & WHERE_NOT_FULLSCAN)==0 ){
          notIndexed |= m;


        }
        if( isOptimal ){
          pWInfo->a[j].rOptCost = sWBI.cost.rCost;
        }else if( ckOptimal ){
          /* If two or more tables have nearly the same outer loop cost, but
          ** very different inner loop (optimal) cost, we want to choose
          ** for the outer loop that table which benefits the least from
          ** being in the inner loop.  The following code scales the 
          ** outer loop cost estimate to accomplish that. */
          WHERETRACE(("   scaling cost from %.1f to %.1f\n",
                      sWBI.cost.rCost,
                      sWBI.cost.rCost/pWInfo->a[j].rOptCost));
          sWBI.cost.rCost /= pWInfo->a[j].rOptCost;






        }





        /* Conditions under which this table becomes the best so far:
        **
        **   (1) The table must not depend on other tables that have not
        **       yet run.  (In other words, it must not depend on tables
        **       in inner loops.)
        **
        **   (2) (This rule was removed on 2012-11-09.  The scaling of the
        **       cost using the optimal scan cost made this rule obsolete.)
        **
        **   (3) All tables have an INDEXED BY clause or this table lacks an
        **       INDEXED BY clause or this table uses the specific
        **       index specified by its INDEXED BY clause.  This rule ensures
        **       that a best-so-far is always selected even if an impossible
        **       combination of INDEXED BY clauses are given.  The error
        **       will be detected and relayed back to the application later.
        **       The NEVER() comes about because rule (2) above prevents
        **       An indexable full-table-scan from reaching rule (3).
        **
        **   (4) The plan cost must be lower than prior plans, where "cost"
        **       is defined by the compareCost() function above. 
        */
        if( (sWBI.cost.used&sWBI.notValid)==0                    /* (1) */
            && (nUnconstrained==0 || sWBI.pSrc->pIndex==0        /* (3) */
                || NEVER((sWBI.cost.plan.wsFlags & WHERE_NOT_FULLSCAN)!=0))
            && (bestJ<0 || compareCost(&sWBI.cost, &bestPlan))   /* (4) */
        ){
          WHERETRACE(("   === table %d (%s) is best so far\n"
                      "       cost=%.1f, nRow=%.1f, nOBSat=%d, wsFlags=%08x\n",
                      j, sWBI.pSrc->pTab->zName,
                      sWBI.cost.rCost, sWBI.cost.plan.nRow,
                      sWBI.cost.plan.nOBSat, sWBI.cost.plan.wsFlags));
          bestPlan = sWBI.cost;
          bestJ = j;



        }




        /* In a join like "w JOIN x LEFT JOIN y JOIN z"  make sure that
        ** table y (and not table z) is always the next inner loop inside
        ** of table x. */
        if( (sWBI.pSrc->jointype & JT_LEFT)!=0 ) break;
      }



    }
    assert( bestJ>=0 );
    assert( sWBI.notValid & getMask(pMaskSet, pTabList->a[bestJ].iCursor) );
    assert( bestJ==iFrom || (pTabList->a[iFrom].jointype & JT_LEFT)==0 );
    testcase( bestJ>iFrom && (pTabList->a[iFrom].jointype & JT_CROSS)!=0 );
    testcase( bestJ>iFrom && bestJ<nTabList-1
                          && (pTabList->a[bestJ+1].jointype & JT_LEFT)!=0 );
    WHERETRACE(("*** Optimizer selects table %d (%s) for loop %d with:\n"
                "    cost=%.1f, nRow=%.1f, nOBSat=%d, wsFlags=0x%08x\n",
                bestJ, pTabList->a[bestJ].pTab->zName,
                pLevel-pWInfo->a, bestPlan.rCost, bestPlan.plan.nRow,
                bestPlan.plan.nOBSat, bestPlan.plan.wsFlags));
    if( (bestPlan.plan.wsFlags & WHERE_DISTINCT)!=0 ){
      assert( pWInfo->eDistinct==0 );
      pWInfo->eDistinct = WHERE_DISTINCT_ORDERED;
    }
    andFlags &= bestPlan.plan.wsFlags;
    pLevel->plan = bestPlan.plan;
    pLevel->iTabCur = pTabList->a[bestJ].iCursor;
    testcase( bestPlan.plan.wsFlags & WHERE_INDEXED );
    testcase( bestPlan.plan.wsFlags & WHERE_TEMP_INDEX );
    if( bestPlan.plan.wsFlags & (WHERE_INDEXED|WHERE_TEMP_INDEX) ){












      if( (wctrlFlags & WHERE_ONETABLE_ONLY) 
       && (bestPlan.plan.wsFlags & WHERE_TEMP_INDEX)==0 
      ){
        pLevel->iIdxCur = iIdxCur;
      }else{
        pLevel->iIdxCur = pParse->nTab++;

      }
    }else{
      pLevel->iIdxCur = -1;







    }
    sWBI.notValid &= ~getMask(pMaskSet, pTabList->a[bestJ].iCursor);
    pLevel->iFrom = (u8)bestJ;
    if( bestPlan.plan.nRow>=(double)1 ){
      pParse->nQueryLoop *= bestPlan.plan.nRow;
    }

    /* Check that if the table scanned by this loop iteration had an
    ** INDEXED BY clause attached to it, that the named index is being
    ** used for the scan. If not, then query compilation has failed.
    ** Return an error.
    */



    pIdx = pTabList->a[bestJ].pIndex;
    if( pIdx ){
      if( (bestPlan.plan.wsFlags & WHERE_INDEXED)==0 ){
        sqlite3ErrorMsg(pParse, "cannot use index: %s", pIdx->zName);
        goto whereBeginError;
      }else{
        /* If an INDEXED BY clause is used, the bestIndex() function is
        ** guaranteed to find the index specified in the INDEXED BY clause
        ** if it find an index at all. */
        assert( bestPlan.plan.u.pIdx==pIdx );
      }
    }
  }
  WHERETRACE(("*** Optimizer Finished ***\n"));
  if( pParse->nErr || db->mallocFailed ){
    goto whereBeginError;

  }
  if( nTabList ){
    pLevel--;
    pWInfo->nOBSat = pLevel->plan.nOBSat;
  }else{
    pWInfo->nOBSat = 0;
  }

  /* If the total query only selects a single row, then the ORDER BY
  ** clause is irrelevant.
  */
  if( (andFlags & WHERE_UNIQUE)!=0 && pOrderBy ){
    assert( nTabList==0 || (pLevel->plan.wsFlags & WHERE_ALL_UNIQUE)!=0 );
    pWInfo->nOBSat = pOrderBy->nExpr;
  }

  /* If the caller is an UPDATE or DELETE statement that is requesting
  ** to use a one-pass algorithm, determine if this is appropriate.
  ** The one-pass algorithm only works if the WHERE clause constraints
  ** the statement to update a single row.
  */
  assert( (wctrlFlags & WHERE_ONEPASS_DESIRED)==0 || pWInfo->nLevel==1 );
  if( (wctrlFlags & WHERE_ONEPASS_DESIRED)!=0 && (andFlags & WHERE_UNIQUE)!=0 ){

    pWInfo->okOnePass = 1;
    pWInfo->a[0].plan.wsFlags &= ~WHERE_IDX_ONLY;
  }

  /* Open all tables in the pTabList and any indices selected for
  ** searching those tables.
  */
  sqlite3CodeVerifySchema(pParse, -1); /* Insert the cookie verifier Goto */
  notReady = ~(Bitmask)0;
  pWInfo->nRowOut = (double)1;
  for(ii=0, pLevel=pWInfo->a; ii<nTabList; ii++, pLevel++){
    Table *pTab;     /* Table to open */
    int iDb;         /* Index of database containing table/index */
    struct SrcList_item *pTabItem;

    pTabItem = &pTabList->a[pLevel->iFrom];
    pTab = pTabItem->pTab;
    pWInfo->nRowOut *= pLevel->plan.nRow;
    iDb = sqlite3SchemaToIndex(db, pTab->pSchema);

    if( (pTab->tabFlags & TF_Ephemeral)!=0 || pTab->pSelect ){
      /* Do nothing */
    }else
#ifndef SQLITE_OMIT_VIRTUALTABLE
    if( (pLevel->plan.wsFlags & WHERE_VIRTUALTABLE)!=0 ){
      const char *pVTab = (const char *)sqlite3GetVTable(db, pTab);
      int iCur = pTabItem->iCursor;
      sqlite3VdbeAddOp4(v, OP_VOpen, iCur, 0, 0, pVTab, P4_VTAB);
    }else if( IsVirtual(pTab) ){
      /* noop */
    }else
#endif
    if( (pLevel->plan.wsFlags & WHERE_IDX_ONLY)==0
         && (wctrlFlags & WHERE_OMIT_OPEN_CLOSE)==0 ){
      int op = pWInfo->okOnePass ? OP_OpenWrite : OP_OpenRead;
      sqlite3OpenTable(pParse, pTabItem->iCursor, iDb, pTab, op);
      testcase( pTab->nCol==BMS-1 );
      testcase( pTab->nCol==BMS );
      if( !pWInfo->okOnePass && pTab->nCol<BMS ){
        Bitmask b = pTabItem->colUsed;
        int n = 0;
        for(; b; b=b>>1, n++){}
        sqlite3VdbeChangeP4(v, sqlite3VdbeCurrentAddr(v)-1, 
                            SQLITE_INT_TO_PTR(n), P4_INT32);
        assert( n<=pTab->nCol );
      }
    }else{
      sqlite3TableLock(pParse, iDb, pTab->tnum, 0, pTab->zName);
    }
#ifndef SQLITE_OMIT_AUTOMATIC_INDEX
    if( (pLevel->plan.wsFlags & WHERE_TEMP_INDEX)!=0 ){
      constructAutomaticIndex(pParse, sWBI.pWC, pTabItem, notReady, pLevel);
    }else
#endif
    if( (pLevel->plan.wsFlags & WHERE_INDEXED)!=0 ){
      Index *pIx = pLevel->plan.u.pIdx;
      KeyInfo *pKey = sqlite3IndexKeyinfo(pParse, pIx);

      int iIndexCur = pLevel->iIdxCur;
      assert( pIx->pSchema==pTab->pSchema );
      assert( iIndexCur>=0 );
      sqlite3VdbeAddOp4(v, OP_OpenRead, iIndexCur, pIx->tnum, iDb,
                        (char*)pKey, P4_KEYINFO_HANDOFF);
      VdbeComment((v, "%s", pIx->zName));
    }
    sqlite3CodeVerifySchema(pParse, iDb);
    notReady &= ~getMask(sWBI.pWC->pMaskSet, pTabItem->iCursor);
  }
  pWInfo->iTop = sqlite3VdbeCurrentAddr(v);
  if( db->mallocFailed ) goto whereBeginError;

  /* Generate the code to do the search.  Each iteration of the for
  ** loop below generates code for a single nested loop of the VM
  ** program.
  */
  notReady = ~(Bitmask)0;
  for(ii=0; ii<nTabList; ii++){
    pLevel = &pWInfo->a[ii];







    explainOneScan(pParse, pTabList, pLevel, ii, pLevel->iFrom, wctrlFlags);

    notReady = codeOneLoopStart(pWInfo, ii, wctrlFlags, notReady);
    pWInfo->iContinue = pLevel->addrCont;
  }

#ifdef SQLITE_TEST  /* For testing and debugging use only */
  /* Record in the query plan information about the current table
  ** and the index used to access it (if any).  If the table itself
  ** is not used, its name is just '{}'.  If no index is used
  ** the index is listed as "{}".  If the primary key is used the
  ** index name is '*'.
  */
  for(ii=0; ii<nTabList; ii++){
    char *z;
    int n;
    int w;
    struct SrcList_item *pTabItem;

    pLevel = &pWInfo->a[ii];
    w = pLevel->plan.wsFlags;
    pTabItem = &pTabList->a[pLevel->iFrom];
    z = pTabItem->zAlias;
    if( z==0 ) z = pTabItem->pTab->zName;
    n = sqlite3Strlen30(z);
    if( n+nQPlan < sizeof(sqlite3_query_plan)-10 ){
      if( (w & WHERE_IDX_ONLY)!=0 && (w & WHERE_COVER_SCAN)==0 ){
        memcpy(&sqlite3_query_plan[nQPlan], "{}", 2);
        nQPlan += 2;
      }else{
        memcpy(&sqlite3_query_plan[nQPlan], z, n);
        nQPlan += n;
      }
      sqlite3_query_plan[nQPlan++] = ' ';
    }
    testcase( w & WHERE_ROWID_EQ );
    testcase( w & WHERE_ROWID_RANGE );
    if( w & (WHERE_ROWID_EQ|WHERE_ROWID_RANGE) ){
      memcpy(&sqlite3_query_plan[nQPlan], "* ", 2);
      nQPlan += 2;
    }else if( (w & WHERE_INDEXED)!=0 && (w & WHERE_COVER_SCAN)==0 ){
      n = sqlite3Strlen30(pLevel->plan.u.pIdx->zName);
      if( n+nQPlan < sizeof(sqlite3_query_plan)-2 ){
        memcpy(&sqlite3_query_plan[nQPlan], pLevel->plan.u.pIdx->zName, n);
        nQPlan += n;
        sqlite3_query_plan[nQPlan++] = ' ';
      }
    }else{
      memcpy(&sqlite3_query_plan[nQPlan], "{} ", 3);
      nQPlan += 3;
    }
  }
  while( nQPlan>0 && sqlite3_query_plan[nQPlan-1]==' ' ){
    sqlite3_query_plan[--nQPlan] = 0;
  }
  sqlite3_query_plan[nQPlan] = 0;
  nQPlan = 0;
#endif /* SQLITE_TEST // Testing and debugging use only */

  /* Record the continuation address in the WhereInfo structure.  Then
  ** clean up and return.
  */
  return pWInfo;

  /* Jump here if malloc fails */
whereBeginError:
  if( pWInfo ){
    pParse->nQueryLoop = pWInfo->savedNQueryLoop;
    whereInfoFree(db, pWInfo);
................................................................................
** sqlite3WhereBegin() for additional information.
*/
SQLITE_PRIVATE void sqlite3WhereEnd(WhereInfo *pWInfo){
  Parse *pParse = pWInfo->pParse;
  Vdbe *v = pParse->pVdbe;
  int i;
  WhereLevel *pLevel;

  SrcList *pTabList = pWInfo->pTabList;
  sqlite3 *db = pParse->db;

  /* Generate loop termination code.
  */
  sqlite3ExprCacheClear(pParse);
  for(i=pWInfo->nLevel-1; i>=0; i--){
    pLevel = &pWInfo->a[i];

    sqlite3VdbeResolveLabel(v, pLevel->addrCont);
    if( pLevel->op!=OP_Noop ){
      sqlite3VdbeAddOp2(v, pLevel->op, pLevel->p1, pLevel->p2);
      sqlite3VdbeChangeP5(v, pLevel->p5);
    }
    if( pLevel->plan.wsFlags & WHERE_IN_ABLE && pLevel->u.in.nIn>0 ){
      struct InLoop *pIn;
      int j;
      sqlite3VdbeResolveLabel(v, pLevel->addrNxt);
      for(j=pLevel->u.in.nIn, pIn=&pLevel->u.in.aInLoop[j-1]; j>0; j--, pIn--){
        sqlite3VdbeJumpHere(v, pIn->addrInTop+1);
        sqlite3VdbeAddOp2(v, pIn->eEndLoopOp, pIn->iCur, pIn->addrInTop);
        sqlite3VdbeJumpHere(v, pIn->addrInTop-1);
................................................................................
      }
      sqlite3DbFree(db, pLevel->u.in.aInLoop);
    }
    sqlite3VdbeResolveLabel(v, pLevel->addrBrk);
    if( pLevel->iLeftJoin ){
      int addr;
      addr = sqlite3VdbeAddOp1(v, OP_IfPos, pLevel->iLeftJoin);
      assert( (pLevel->plan.wsFlags & WHERE_IDX_ONLY)==0
           || (pLevel->plan.wsFlags & WHERE_INDEXED)!=0 );
      if( (pLevel->plan.wsFlags & WHERE_IDX_ONLY)==0 ){
        sqlite3VdbeAddOp1(v, OP_NullRow, pTabList->a[i].iCursor);
      }
      if( pLevel->iIdxCur>=0 ){
        sqlite3VdbeAddOp1(v, OP_NullRow, pLevel->iIdxCur);
      }
      if( pLevel->op==OP_Return ){
        sqlite3VdbeAddOp2(v, OP_Gosub, pLevel->p1, pLevel->addrFirst);
      }else{
        sqlite3VdbeAddOp2(v, OP_Goto, 0, pLevel->addrFirst);
      }
................................................................................
  /* The "break" point is here, just past the end of the outer loop.
  ** Set it.
  */
  sqlite3VdbeResolveLabel(v, pWInfo->iBreak);

  /* Close all of the cursors that were opened by sqlite3WhereBegin.
  */
  assert( pWInfo->nLevel==1 || pWInfo->nLevel==pTabList->nSrc );
  for(i=0, pLevel=pWInfo->a; i<pWInfo->nLevel; i++, pLevel++){
    Index *pIdx = 0;
    struct SrcList_item *pTabItem = &pTabList->a[pLevel->iFrom];
    Table *pTab = pTabItem->pTab;
    assert( pTab!=0 );

    if( (pTab->tabFlags & TF_Ephemeral)==0
     && pTab->pSelect==0
     && (pWInfo->wctrlFlags & WHERE_OMIT_OPEN_CLOSE)==0
    ){
      int ws = pLevel->plan.wsFlags;
      if( !pWInfo->okOnePass && (ws & WHERE_IDX_ONLY)==0 ){
        sqlite3VdbeAddOp1(v, OP_Close, pTabItem->iCursor);
      }
      if( (ws & WHERE_INDEXED)!=0 && (ws & WHERE_TEMP_INDEX)==0 ){
        sqlite3VdbeAddOp1(v, OP_Close, pLevel->iIdxCur);
      }
    }

    /* If this scan uses an index, make code substitutions to read data
    ** from the index in preference to the table. Sometimes, this means
    ** the table need never be read from. This is a performance boost,
    ** as the vdbe level waits until the table is read before actually
    ** seeking the table cursor to the record corresponding to the current
    ** position in the index.
    ** 
    ** Calls to the code generator in between sqlite3WhereBegin and
    ** sqlite3WhereEnd will have created code that references the table
    ** directly.  This loop scans all that code looking for opcodes
    ** that reference the table and converts them into opcodes that
    ** reference the index.
    */
    if( pLevel->plan.wsFlags & WHERE_INDEXED ){
      pIdx = pLevel->plan.u.pIdx;
    }else if( pLevel->plan.wsFlags & WHERE_MULTI_OR ){
      pIdx = pLevel->u.pCovidx;
    }
    if( pIdx && !db->mallocFailed){
      int k, j, last;
      VdbeOp *pOp;

      pOp = sqlite3VdbeGetOp(v, pWInfo->iTop);
      last = sqlite3VdbeCurrentAddr(v);


      for(k=pWInfo->iTop; k<last; k++, pOp++){
        if( pOp->p1!=pLevel->iTabCur ) continue;
        if( pOp->opcode==OP_Column ){
          for(j=0; j<pIdx->nColumn; j++){
            if( pOp->p2==pIdx->aiColumn[j] ){
              pOp->p2 = j;
              pOp->p1 = pLevel->iIdxCur;
              break;
            }
          }
          assert( (pLevel->plan.wsFlags & WHERE_IDX_ONLY)==0
               || j<pIdx->nColumn );
        }else if( pOp->opcode==OP_Rowid ){
          pOp->p1 = pLevel->iIdxCur;
          pOp->opcode = OP_IdxRowid;
        }
      }
    }
  }
................................................................................
#ifndef YYSTACKDEPTH
#define YYSTACKDEPTH 100
#endif
#define sqlite3ParserARG_SDECL Parse *pParse;
#define sqlite3ParserARG_PDECL ,Parse *pParse
#define sqlite3ParserARG_FETCH Parse *pParse = yypParser->pParse
#define sqlite3ParserARG_STORE yypParser->pParse = pParse
#define YYNSTATE 627
#define YYNRULE 327
#define YYFALLBACK 1
#define YY_NO_ACTION      (YYNSTATE+YYNRULE+2)
#define YY_ACCEPT_ACTION  (YYNSTATE+YYNRULE+1)
#define YY_ERROR_ACTION   (YYNSTATE+YYNRULE)

/* The yyzerominor constant is used to initialize instances of
................................................................................
**                     shifting terminals.
**  yy_reduce_ofst[]   For each state, the offset into yy_action for
**                     shifting non-terminals after a reduce.
**  yy_default[]       Default action for each state.
*/
#define YY_ACTTAB_COUNT (1564)
static const YYACTIONTYPE yy_action[] = {
 /*     0 */   309,  955,  184,  417,    2,  171,  624,  594,   56,   56,
 /*    10 */    56,   56,   49,   54,   54,   54,   54,   53,   53,   52,
 /*    20 */    52,   52,   51,  233,  620,  619,  298,  620,  619,  234,
 /*    30 */   587,  581,   56,   56,   56,   56,   19,   54,   54,   54,
 /*    40 */    54,   53,   53,   52,   52,   52,   51,  233,  605,   57,
 /*    50 */    58,   48,  579,  578,  580,  580,   55,   55,   56,   56,
 /*    60 */    56,   56,  541,   54,   54,   54,   54,   53,   53,   52,
 /*    70 */    52,   52,   51,  233,  309,  594,  325,  196,  195,  194,
 /*    80 */    33,   54,   54,   54,   54,   53,   53,   52,   52,   52,
 /*    90 */    51,  233,  617,  616,  165,  617,  616,  380,  377,  376,
 /*   100 */   407,  532,  576,  576,  587,  581,  303,  422,  375,   59,
 /*   110 */    53,   53,   52,   52,   52,   51,  233,   50,   47,  146,
 /*   120 */   574,  545,   65,   57,   58,   48,  579,  578,  580,  580,
 /*   130 */    55,   55,   56,   56,   56,   56,  213,   54,   54,   54,
 /*   140 */    54,   53,   53,   52,   52,   52,   51,  233,  309,  223,
 /*   150 */   539,  420,  170,  176,  138,  280,  383,  275,  382,  168,
 /*   160 */   489,  551,  409,  668,  620,  619,  271,  438,  409,  438,
 /*   170 */   550,  604,   67,  482,  507,  618,  599,  412,  587,  581,
 /*   180 */   600,  483,  618,  412,  618,  598,   91,  439,  440,  439,
 /*   190 */   335,  598,   73,  669,  222,  266,  480,   57,   58,   48,
 /*   200 */   579,  578,  580,  580,   55,   55,   56,   56,   56,   56,
 /*   210 */   670,   54,   54,   54,   54,   53,   53,   52,   52,   52,
 /*   220 */    51,  233,  309,  279,  232,  231,    1,  132,  200,  385,
 /*   230 */   620,  619,  617,  616,  278,  435,  289,  563,  175,  262,
 /*   240 */   409,  264,  437,  497,  436,  166,  441,  568,  336,  568,
 /*   250 */   201,  537,  587,  581,  599,  412,  165,  594,  600,  380,
 /*   260 */   377,  376,  597,  598,   92,  523,  618,  569,  569,  592,
 /*   270 */   375,   57,   58,   48,  579,  578,  580,  580,   55,   55,
 /*   280 */    56,   56,   56,   56,  597,   54,   54,   54,   54,   53,
 /*   290 */    53,   52,   52,   52,   51,  233,  309,  463,  617,  616,
 /*   300 */   590,  590,  590,  174,  272,  396,  409,  272,  409,  548,
 /*   310 */   397,  620,  619,   68,  326,  620,  619,  620,  619,  618,
 /*   320 */   546,  412,  618,  412,  471,  594,  587,  581,  472,  598,
 /*   330 */    92,  598,   92,   52,   52,   52,   51,  233,  513,  512,
 /*   340 */   206,  322,  363,  464,  221,   57,   58,   48,  579,  578,
 /*   350 */   580,  580,   55,   55,   56,   56,   56,   56,  529,   54,
 /*   360 */    54,   54,   54,   53,   53,   52,   52,   52,   51,  233,
 /*   370 */   309,  396,  409,  396,  597,  372,  386,  530,  347,  617,
 /*   380 */   616,  575,  202,  617,  616,  617,  616,  412,  620,  619,
 /*   390 */   145,  255,  346,  254,  577,  598,   74,  351,   45,  489,
 /*   400 */   587,  581,  235,  189,  464,  544,  167,  296,  187,  469,
 /*   410 */   479,   67,   62,   39,  618,  546,  597,  345,  573,   57,
 /*   420 */    58,   48,  579,  578,  580,  580,   55,   55,   56,   56,
 /*   430 */    56,   56,    6,   54,   54,   54,   54,   53,   53,   52,
 /*   440 */    52,   52,   51,  233,  309,  562,  558,  407,  528,  576,
 /*   450 */   576,  344,  255,  346,  254,  182,  617,  616,  503,  504,
 /*   460 */   314,  409,  557,  235,  166,  271,  409,  352,  564,  181,
 /*   470 */   407,  546,  576,  576,  587,  581,  412,  537,  556,  561,
 /*   480 */   517,  412,  618,  249,  598,   16,    7,   36,  467,  598,
 /*   490 */    92,  516,  618,   57,   58,   48,  579,  578,  580,  580,
 /*   500 */    55,   55,   56,   56,   56,   56,  541,   54,   54,   54,
 /*   510 */    54,   53,   53,   52,   52,   52,   51,  233,  309,  327,
 /*   520 */   572,  571,  525,  558,  560,  394,  871,  246,  409,  248,
 /*   530 */   171,  392,  594,  219,  407,  409,  576,  576,  502,  557,
 /*   540 */   364,  145,  510,  412,  407,  229,  576,  576,  587,  581,
 /*   550 */   412,  598,   92,  381,  269,  556,  166,  400,  598,   69,
 /*   560 */   501,  419,  945,  199,  945,  198,  546,   57,   58,   48,
 /*   570 */   579,  578,  580,  580,   55,   55,   56,   56,   56,   56,
 /*   580 */   568,   54,   54,   54,   54,   53,   53,   52,   52,   52,
 /*   590 */    51,  233,  309,  317,  419,  944,  508,  944,  308,  597,
 /*   600 */   594,  565,  490,  212,  173,  247,  423,  615,  614,  613,
 /*   610 */   323,  197,  143,  405,  572,  571,  489,   66,   50,   47,
 /*   620 */   146,  594,  587,  581,  232,  231,  559,  427,   67,  555,
 /*   630 */    15,  618,  186,  543,  303,  421,   35,  206,  432,  423,
 /*   640 */   552,   57,   58,   48,  579,  578,  580,  580,   55,   55,
 /*   650 */    56,   56,   56,   56,  205,   54,   54,   54,   54,   53,
 /*   660 */    53,   52,   52,   52,   51,  233,  309,  569,  569,  260,
 /*   670 */   268,  597,   12,  373,  568,  166,  409,  313,  409,  420,
 /*   680 */   409,  473,  473,  365,  618,   50,   47,  146,  597,  594,
 /*   690 */   468,  412,  166,  412,  351,  412,  587,  581,   32,  598,
 /*   700 */    94,  598,   97,  598,   95,  627,  625,  329,  142,   50,
 /*   710 */    47,  146,  333,  349,  358,   57,   58,   48,  579,  578,
 /*   720 */   580,  580,   55,   55,   56,   56,   56,   56,  409,   54,
 /*   730 */    54,   54,   54,   53,   53,   52,   52,   52,   51,  233,
 /*   740 */   309,  409,  388,  412,  409,   22,  565,  404,  212,  362,
 /*   750 */   389,  598,  104,  359,  409,  156,  412,  409,  603,  412,
 /*   760 */   537,  331,  569,  569,  598,  103,  493,  598,  105,  412,
 /*   770 */   587,  581,  412,  260,  549,  618,   11,  598,  106,  521,
 /*   780 */   598,  133,  169,  457,  456,  170,   35,  601,  618,   57,
 /*   790 */    58,   48,  579,  578,  580,  580,   55,   55,   56,   56,
 /*   800 */    56,   56,  409,   54,   54,   54,   54,   53,   53,   52,
 /*   810 */    52,   52,   51,  233,  309,  409,  259,  412,  409,   50,
 /*   820 */    47,  146,  357,  318,  355,  598,  134,  527,  352,  337,
 /*   830 */   412,  409,  356,  412,  357,  409,  357,  618,  598,   98,
 /*   840 */   129,  598,  102,  618,  587,  581,  412,   21,  235,  618,
 /*   850 */   412,  618,  211,  143,  598,  101,   30,  167,  598,   93,
 /*   860 */   350,  535,  203,   57,   58,   48,  579,  578,  580,  580,
 /*   870 */    55,   55,   56,   56,   56,   56,  409,   54,   54,   54,
 /*   880 */    54,   53,   53,   52,   52,   52,   51,  233,  309,  409,
 /*   890 */   526,  412,  409,  425,  215,  305,  597,  551,  141,  598,
 /*   900 */   100,   40,  409,   38,  412,  409,  550,  412,  409,  228,
 /*   910 */   220,  314,  598,   77,  500,  598,   96,  412,  587,  581,
 /*   920 */   412,  338,  253,  412,  218,  598,  137,  379,  598,  136,
 /*   930 */    28,  598,  135,  270,  715,  210,  481,   57,   58,   48,
 /*   940 */   579,  578,  580,  580,   55,   55,   56,   56,   56,   56,
 /*   950 */   409,   54,   54,   54,   54,   53,   53,   52,   52,   52,
 /*   960 */    51,  233,  309,  409,  272,  412,  409,  315,  147,  597,
 /*   970 */   272,  626,    2,  598,   76,  209,  409,  127,  412,  618,
 /*   980 */   126,  412,  409,  621,  235,  618,  598,   90,  374,  598,
 /*   990 */    89,  412,  587,  581,   27,  260,  350,  412,  618,  598,
 /*  1000 */    75,  321,  541,  541,  125,  598,   88,  320,  278,  597,
 /*  1010 */   618,   57,   46,   48,  579,  578,  580,  580,   55,   55,
 /*  1020 */    56,   56,   56,   56,  409,   54,   54,   54,   54,   53,
 /*  1030 */    53,   52,   52,   52,   51,  233,  309,  409,  450,  412,
 /*  1040 */   164,  284,  282,  272,  609,  424,  304,  598,   87,  370,
 /*  1050 */   409,  477,  412,  409,  608,  409,  607,  602,  618,  618,
 /*  1060 */   598,   99,  586,  585,  122,  412,  587,  581,  412,  618,
 /*  1070 */   412,  618,  618,  598,   86,  366,  598,   17,  598,   85,
 /*  1080 */   319,  185,  519,  518,  583,  582,   58,   48,  579,  578,
 /*  1090 */   580,  580,   55,   55,   56,   56,   56,   56,  409,   54,
 /*  1100 */    54,   54,   54,   53,   53,   52,   52,   52,   51,  233,
 /*  1110 */   309,  584,  409,  412,  409,  260,  260,  260,  408,  591,
 /*  1120 */   474,  598,   84,  170,  409,  466,  518,  412,  121,  412,
 /*  1130 */   618,  618,  618,  618,  618,  598,   83,  598,   72,  412,
 /*  1140 */   587,  581,   51,  233,  625,  329,  470,  598,   71,  257,
 /*  1150 */   159,  120,   14,  462,  157,  158,  117,  260,  448,  447,
 /*  1160 */   446,   48,  579,  578,  580,  580,   55,   55,   56,   56,
 /*  1170 */    56,   56,  618,   54,   54,   54,   54,   53,   53,   52,
 /*  1180 */    52,   52,   51,  233,   44,  403,  260,    3,  409,  459,
 /*  1190 */   260,  413,  619,  118,  398,   10,   25,   24,  554,  348,
 /*  1200 */   217,  618,  406,  412,  409,  618,    4,   44,  403,  618,
 /*  1210 */     3,  598,   82,  618,  413,  619,  455,  542,  115,  412,
 /*  1220 */   538,  401,  536,  274,  506,  406,  251,  598,   81,  216,
 /*  1230 */   273,  563,  618,  243,  453,  618,  154,  618,  618,  618,
 /*  1240 */   449,  416,  623,  110,  401,  618,  409,  236,   64,  123,
 /*  1250 */   487,   41,   42,  531,  563,  204,  409,  267,   43,  411,
 /*  1260 */   410,  412,  265,  592,  108,  618,  107,  434,  332,  598,
 /*  1270 */    80,  412,  618,  263,   41,   42,  443,  618,  409,  598,
 /*  1280 */    70,   43,  411,  410,  433,  261,  592,  149,  618,  597,
 /*  1290 */   256,  237,  188,  412,  590,  590,  590,  589,  588,   13,
 /*  1300 */   618,  598,   18,  328,  235,  618,   44,  403,  360,    3,
 /*  1310 */   418,  461,  339,  413,  619,  227,  124,  590,  590,  590,
 /*  1320 */   589,  588,   13,  618,  406,  409,  618,  409,  139,   34,
 /*  1330 */   403,  387,    3,  148,  622,  312,  413,  619,  311,  330,
 /*  1340 */   412,  460,  412,  401,  180,  353,  412,  406,  598,   79,
 /*  1350 */   598,   78,  250,  563,  598,    9,  618,  612,  611,  610,
 /*  1360 */   618,    8,  452,  442,  242,  415,  401,  618,  239,  235,
 /*  1370 */   179,  238,  428,   41,   42,  288,  563,  618,  618,  618,
 /*  1380 */    43,  411,  410,  618,  144,  592,  618,  618,  177,   61,
 /*  1390 */   618,  596,  391,  620,  619,  287,   41,   42,  414,  618,
 /*  1400 */   293,   30,  393,   43,  411,  410,  292,  618,  592,   31,
 /*  1410 */   618,  395,  291,   60,  230,   37,  590,  590,  590,  589,
 /*  1420 */   588,   13,  214,  553,  183,  290,  172,  301,  300,  299,
 /*  1430 */   178,  297,  595,  563,  451,   29,  285,  390,  540,  590,
 /*  1440 */   590,  590,  589,  588,   13,  283,  520,  534,  150,  533,
 /*  1450 */   241,  281,  384,  192,  191,  324,  515,  514,  276,  240,
 /*  1460 */   510,  523,  307,  511,  128,  592,  509,  225,  226,  486,
 /*  1470 */   485,  224,  152,  491,  464,  306,  484,  163,  153,  371,
 /*  1480 */   478,  151,  162,  258,  369,  161,  367,  208,  475,  476,
 /*  1490 */    26,  160,  465,  140,  361,  131,  590,  590,  590,  116,
 /*  1500 */   119,  454,  343,  155,  114,  342,  113,  112,  445,  111,
 /*  1510 */   130,  109,  431,  316,  426,  430,   23,  429,   20,  606,
 /*  1520 */   190,  507,  255,  341,  244,   63,  294,  593,  310,  570,
 /*  1530 */   277,  402,  354,  235,  567,  496,  495,  492,  494,  302,
 /*  1540 */   458,  378,  286,  245,  566,    5,  252,  547,  193,  444,
 /*  1550 */   233,  340,  207,  524,  368,  505,  334,  522,  499,  399,
 /*  1560 */   295,  498,  956,  488,
};
static const YYCODETYPE yy_lookahead[] = {
 /*     0 */    19,  142,  143,  144,  145,   24,    1,   26,   77,   78,
 /*    10 */    79,   80,   81,   82,   83,   84,   85,   86,   87,   88,
 /*    20 */    89,   90,   91,   92,   26,   27,   15,   26,   27,  197,
 /*    30 */    49,   50,   77,   78,   79,   80,  204,   82,   83,   84,
 /*    40 */    85,   86,   87,   88,   89,   90,   91,   92,   23,   68,
................................................................................
 /*  1420 */   133,  134,    5,  157,  157,  202,  118,   10,   11,   12,
 /*  1430 */    13,   14,  203,   66,   17,  104,  210,  121,  211,  129,
 /*  1440 */   130,  131,  132,  133,  134,  210,  175,  211,   31,  211,
 /*  1450 */    33,  210,  104,   86,   87,   47,  175,  183,  175,   42,
 /*  1460 */   103,   94,  178,  177,   22,   98,  175,   92,  228,  175,
 /*  1470 */   175,  228,   55,  183,   57,  178,  175,  156,   61,   18,
 /*  1480 */   157,   64,  156,  235,  157,  156,   45,  157,  236,  157,
 /*  1490 */   135,  156,  189,   68,  157,  218,  129,  130,  131,   22,
 /*  1500 */   189,  199,  157,  156,  192,   18,  192,  192,  199,  192,
 /*  1510 */   218,  189,   40,  157,   38,  157,  240,  157,  240,  153,
 /*  1520 */   196,  181,  105,  106,  107,  243,  198,  166,  111,  230,
 /*  1530 */   176,  226,  239,  116,  230,  176,  166,  166,  176,  148,
 /*  1540 */   199,  177,  209,  209,  166,  196,  239,  208,  185,  199,
 /*  1550 */    92,  209,  233,  173,  234,  182,  139,  173,  182,  191,
 /*  1560 */   195,  182,  250,  186,
};
#define YY_SHIFT_USE_DFLT (-70)
#define YY_SHIFT_COUNT (416)
#define YY_SHIFT_MIN   (-69)
#define YY_SHIFT_MAX   (1487)
static const short yy_shift_ofst[] = {
 /*     0 */  1143, 1188, 1417, 1188, 1287, 1287,  138,  138,   -2,  -19,
 /*    10 */  1287, 1287, 1287, 1287,  347,  362,  129,  129,  795, 1165,
 /*    20 */  1287, 1287, 1287, 1287, 1287, 1287, 1287, 1287, 1287, 1287,
 /*    30 */  1287, 1287, 1287, 1287, 1287, 1287, 1287, 1287, 1287, 1287,
................................................................................
 /*    60 */  1287, 1287,  286,  362,  362,  538,  538,  231, 1253,   55,
 /*    70 */   721,  647,  573,  499,  425,  351,  277,  203,  869,  869,
 /*    80 */   869,  869,  869,  869,  869,  869,  869,  869,  869,  869,
 /*    90 */   869,  869,  869,  943,  869, 1017, 1091, 1091,  -69,  -45,
 /*   100 */   -45,  -45,  -45,  -45,   -1,   24,  245,  362,  362,  362,
 /*   110 */   362,  362,  362,  362,  362,  362,  362,  362,  362,  362,
 /*   120 */   362,  362,  362,  388,  356,  362,  362,  362,  362,  362,
 /*   130 */   732,  868,  231, 1051, 1458,  -70,  -70,  -70, 1367,   57,
 /*   140 */   434,  434,  289,  291,  285,    1,  204,  572,  539,  362,
 /*   150 */   362,  362,  362,  362,  362,  362,  362,  362,  362,  362,
 /*   160 */   362,  362,  362,  362,  362,  362,  362,  362,  362,  362,
 /*   170 */   362,  362,  362,  362,  362,  362,  362,  362,  362,  362,
 /*   180 */   362,  506,  506,  506,  705, 1253, 1253, 1253,  -70,  -70,
 /*   190 */   -70,  171,  171,  160,  502,  502,  502,  446,  432,  511,
 /*   200 */   422,  358,  335,  -12,  -12,  -12,  -12,  576,  294,  -12,
 /*   210 */   -12,  295,  595,  141,  600,  730,  723,  723,  805,  730,
 /*   220 */   805,  439,  911,  231,  865,  231,  865,  807,  865,  723,
 /*   230 */   766,  633,  633,  231,  284,   63,  608, 1476, 1308, 1308,
 /*   240 */  1472, 1472, 1308, 1477, 1425, 1275, 1487, 1487, 1487, 1487,
 /*   250 */  1308, 1461, 1275, 1477, 1425, 1425, 1308, 1461, 1355, 1441,
 /*   260 */  1308, 1308, 1461, 1308, 1461, 1308, 1461, 1442, 1348, 1348,
 /*   270 */  1348, 1408, 1375, 1375, 1442, 1348, 1357, 1348, 1408, 1348,
 /*   280 */  1348, 1316, 1331, 1316, 1331, 1316, 1331, 1308, 1308, 1280,
 /*   290 */  1288, 1289, 1285, 1279, 1275, 1253, 1336, 1346, 1346, 1338,
 /*   300 */  1338, 1338, 1338,  -70,  -70,  -70,  -70,  -70,  -70, 1013,
 /*   310 */   467,  612,   84,  179,  -28,  870,  410,  761,  760,  667,
 /*   320 */   650,  531,  220,  361,  331,  125,  127,   97, 1306, 1300,
 /*   330 */  1270, 1151, 1272, 1203, 1232, 1261, 1244, 1148, 1174, 1139,
 /*   340 */  1156, 1124, 1220, 1115, 1210, 1233, 1099, 1193, 1184, 1174,
 /*   350 */  1173, 1029, 1121, 1120, 1085, 1162, 1119, 1037, 1152, 1147,
 /*   360 */  1129, 1046, 1011, 1093, 1098, 1075, 1061, 1032,  960, 1057,
 /*   370 */  1031, 1030,  899,  938,  982,  936,  972,  958,  910,  955,
 /*   380 */   875,  885,  908,  857,  859,  867,  804,  590,  834,  747,
 /*   390 */   818,  513,  611,  741,  673,  637,  611,  606,  603,  579,
 /*   400 */   501,  541,  468,  386,  445,  395,  376,  281,  185,  120,
 /*   410 */    92,   75,   45,  114,   25,   11,    5,
};
#define YY_REDUCE_USE_DFLT (-169)
#define YY_REDUCE_COUNT (308)
#define YY_REDUCE_MIN   (-168)
#define YY_REDUCE_MAX   (1391)
static const short yy_reduce_ofst[] = {
 /*     0 */  -141,   90, 1095,  222,  158,  156,   19,   17,   10, -104,
 /*    10 */   378,  316,  311,   12,  180,  249,  598,  464,  397, 1181,
 /*    20 */  1177, 1175, 1128, 1106, 1096, 1054, 1038,  974,  964,  962,
 /*    30 */   948,  905,  903,  900,  887,  874,  832,  826,  816,  813,
 /*    40 */   800,  758,  755,  752,  742,  739,  726,  685,  681,  668,
 /*    50 */   665,  652,  607,  604,  594,  591,  578,  530,  528,  526,
................................................................................
 /*   120 */   893,  327,  623,  522,   -7,  820,  814,  157,  154,  101,
 /*   130 */   702,  494,  580,  488,  488,  488,  488,  488,  614,  586,
 /*   140 */   935,  892,  968, 1245, 1242, 1234, 1225,  798,  798, 1222,
 /*   150 */  1221, 1218, 1214, 1213, 1212, 1202, 1195, 1191, 1161, 1158,
 /*   160 */  1140, 1135, 1123, 1112, 1107, 1100, 1080, 1074, 1073, 1072,
 /*   170 */  1070, 1067, 1048, 1044,  969,  968,  907,  906,  904,  894,
 /*   180 */   833,  837,  836,  340,  827,  815,  775,   68,  722,  646,
 /*   190 */  -168, 1384, 1380, 1377, 1379, 1376, 1373, 1339, 1365, 1368,
 /*   200 */  1365, 1365, 1365, 1365, 1365, 1365, 1365, 1320, 1319, 1365,
 /*   210 */  1365, 1339, 1378, 1349, 1391, 1350, 1342, 1334, 1307, 1341,
 /*   220 */  1293, 1364, 1363, 1371, 1362, 1370, 1359, 1340, 1354, 1333,
 /*   230 */  1305, 1304, 1299, 1361, 1328, 1324, 1366, 1282, 1360, 1358,
 /*   240 */  1278, 1276, 1356, 1292, 1322, 1309, 1317, 1315, 1314, 1312,
 /*   250 */  1345, 1347, 1302, 1277, 1311, 1303, 1337, 1335, 1252, 1248,
 /*   260 */  1332, 1330, 1329, 1327, 1326, 1323, 1321, 1297, 1301, 1295,
 /*   270 */  1294, 1290, 1243, 1240, 1284, 1291, 1286, 1283, 1274, 1281,
 /*   280 */  1271, 1238, 1241, 1236, 1235, 1227, 1226, 1267, 1266, 1189,
 /*   290 */  1229, 1223, 1211, 1206, 1201, 1197, 1239, 1237, 1219, 1216,
 /*   300 */  1209, 1208, 1185, 1089, 1086, 1087, 1137, 1136, 1164,
};
static const YYACTIONTYPE yy_default[] = {
 /*     0 */   632,  866,  954,  954,  866,  866,  954,  954,  954,  756,
 /*    10 */   954,  954,  954,  864,  954,  954,  784,  784,  928,  954,
 /*    20 */   954,  954,  954,  954,  954,  954,  954,  954,  954,  954,
 /*    30 */   954,  954,  954,  954,  954,  954,  954,  954,  954,  954,
 /*    40 */   954,  954,  954,  954,  954,  954,  954,  954,  954,  954,
 /*    50 */   954,  954,  954,  954,  954,  954,  954,  954,  954,  954,
 /*    60 */   954,  954,  954,  954,  954,  954,  954,  671,  760,  790,
 /*    70 */   954,  954,  954,  954,  954,  954,  954,  954,  927,  929,
 /*    80 */   798,  797,  907,  771,  795,  788,  792,  867,  860,  861,
 /*    90 */   859,  863,  868,  954,  791,  827,  844,  826,  838,  843,
 /*   100 */   850,  842,  839,  829,  828,  830,  831,  954,  954,  954,
 /*   110 */   954,  954,  954,  954,  954,  954,  954,  954,  954,  954,
 /*   120 */   954,  954,  954,  658,  725,  954,  954,  954,  954,  954,
 /*   130 */   954,  954,  954,  832,  833,  847,  846,  845,  954,  663,
 /*   140 */   954,  954,  954,  954,  954,  954,  954,  954,  954,  954,
 /*   150 */   934,  932,  954,  879,  954,  954,  954,  954,  954,  954,
 /*   160 */   954,  954,  954,  954,  954,  954,  954,  954,  954,  954,
 /*   170 */   954,  954,  954,  954,  954,  954,  954,  954,  954,  954,
 /*   180 */   638,  756,  756,  756,  632,  954,  954,  954,  946,  760,
 /*   190 */   750,  954,  954,  954,  954,  954,  954,  954,  954,  954,
 /*   200 */   954,  954,  954,  800,  739,  917,  919,  954,  900,  737,
 /*   210 */   660,  758,  673,  748,  640,  794,  773,  773,  912,  794,
 /*   220 */   912,  696,  719,  954,  784,  954,  784,  693,  784,  773,
 /*   230 */   862,  954,  954,  954,  757,  748,  954,  939,  764,  764,
 /*   240 */   931,  931,  764,  806,  729,  794,  736,  736,  736,  736,
 /*   250 */   764,  655,  794,  806,  729,  729,  764,  655,  906,  904,
 /*   260 */   764,  764,  655,  764,  655,  764,  655,  872,  727,  727,
 /*   270 */   727,  711,  876,  876,  872,  727,  696,  727,  711,  727,
 /*   280 */   727,  777,  772,  777,  772,  777,  772,  764,  764,  954,
 /*   290 */   789,  778,  787,  785,  794,  954,  714,  648,  648,  637,
 /*   300 */   637,  637,  637,  951,  951,  946,  698,  698,  681,  954,
 /*   310 */   954,  954,  954,  954,  954,  954,  881,  954,  954,  954,
 /*   320 */   954,  954,  954,  954,  954,  954,  954,  954,  954,  633,
 /*   330 */   941,  954,  954,  938,  954,  954,  954,  954,  799,  954,
 /*   340 */   954,  954,  954,  954,  954,  954,  954,  954,  954,  916,
 /*   350 */   954,  954,  954,  954,  954,  954,  954,  910,  954,  954,
 /*   360 */   954,  954,  954,  954,  903,  902,  954,  954,  954,  954,
 /*   370 */   954,  954,  954,  954,  954,  954,  954,  954,  954,  954,
 /*   380 */   954,  954,  954,  954,  954,  954,  954,  954,  954,  954,
 /*   390 */   954,  954,  786,  954,  779,  954,  865,  954,  954,  954,
 /*   400 */   954,  954,  954,  954,  954,  954,  954,  742,  815,  954,
 /*   410 */   814,  818,  813,  665,  954,  646,  954,  629,  634,  950,
 /*   420 */   953,  952,  949,  948,  947,  942,  940,  937,  936,  935,
 /*   430 */   933,  930,  926,  885,  883,  890,  889,  888,  887,  886,
 /*   440 */   884,  882,  880,  801,  796,  793,  925,  878,  738,  735,
 /*   450 */   734,  654,  943,  909,  918,  805,  804,  807,  915,  914,
 /*   460 */   913,  911,  908,  895,  803,  802,  730,  870,  869,  657,
 /*   470 */   899,  898,  897,  901,  905,  896,  766,  656,  653,  662,
 /*   480 */   717,  718,  726,  724,  723,  722,  721,  720,  716,  664,
 /*   490 */   672,  710,  695,  694,  875,  877,  874,  873,  703,  702,
 /*   500 */   708,  707,  706,  705,  704,  701,  700,  699,  692,  691,
 /*   510 */   697,  690,  713,  712,  709,  689,  733,  732,  731,  728,
 /*   520 */   688,  687,  686,  818,  685,  684,  824,  823,  811,  854,
 /*   530 */   753,  752,  751,  763,  762,  775,  774,  809,  808,  776,
 /*   540 */   761,  755,  754,  770,  769,  768,  767,  759,  749,  781,
 /*   550 */   783,  782,  780,  856,  765,  853,  924,  923,  922,  921,
 /*   560 */   920,  858,  857,  825,  822,  676,  677,  893,  892,  894,
 /*   570 */   891,  679,  678,  675,  674,  855,  744,  743,  851,  848,
 /*   580 */   840,  836,  852,  849,  841,  837,  835,  834,  820,  819,
 /*   590 */   817,  816,  812,  821,  667,  745,  741,  740,  810,  747,
 /*   600 */   746,  683,  682,  680,  661,  659,  652,  650,  649,  651,
 /*   610 */   647,  645,  644,  643,  642,  641,  670,  669,  668,  666,
 /*   620 */   665,  639,  636,  635,  631,  630,  628,
};

/* The next table maps tokens into fallback tokens.  If a construct
** like the following:
** 
**      %fallback ID X Y Z.
**
................................................................................
 /* 235 */ "case_else ::=",
 /* 236 */ "case_operand ::= expr",
 /* 237 */ "case_operand ::=",
 /* 238 */ "exprlist ::= nexprlist",
 /* 239 */ "exprlist ::=",
 /* 240 */ "nexprlist ::= nexprlist COMMA expr",
 /* 241 */ "nexprlist ::= expr",
 /* 242 */ "cmd ::= createkw uniqueflag INDEX ifnotexists nm dbnm ON nm LP idxlist RP",
 /* 243 */ "uniqueflag ::= UNIQUE",
 /* 244 */ "uniqueflag ::=",
 /* 245 */ "idxlist_opt ::=",
 /* 246 */ "idxlist_opt ::= LP idxlist RP",
 /* 247 */ "idxlist ::= idxlist COMMA nm collate sortorder",
 /* 248 */ "idxlist ::= nm collate sortorder",
 /* 249 */ "collate ::=",
................................................................................
  { 226, 0 },
  { 224, 1 },
  { 224, 0 },
  { 220, 1 },
  { 220, 0 },
  { 215, 3 },
  { 215, 1 },
  { 147, 11 },
  { 227, 1 },
  { 227, 0 },
  { 178, 0 },
  { 178, 3 },
  { 187, 5 },
  { 187, 3 },
  { 228, 0 },
................................................................................
{yygotominor.yy159 = yymsp[0].minor.yy159;}
        break;
      case 114: /* select ::= select multiselect_op oneselect */
{
  if( yymsp[0].minor.yy159 ){
    yymsp[0].minor.yy159->op = (u8)yymsp[-1].minor.yy392;
    yymsp[0].minor.yy159->pPrior = yymsp[-2].minor.yy159;

  }else{
    sqlite3SelectDelete(pParse->db, yymsp[-2].minor.yy159);
  }
  yygotominor.yy159 = yymsp[0].minor.yy159;
}
        break;
      case 116: /* multiselect_op ::= UNION ALL */
................................................................................
        break;
      case 240: /* nexprlist ::= nexprlist COMMA expr */
{yygotominor.yy442 = sqlite3ExprListAppend(pParse,yymsp[-2].minor.yy442,yymsp[0].minor.yy342.pExpr);}
        break;
      case 241: /* nexprlist ::= expr */
{yygotominor.yy442 = sqlite3ExprListAppend(pParse,0,yymsp[0].minor.yy342.pExpr);}
        break;
      case 242: /* cmd ::= createkw uniqueflag INDEX ifnotexists nm dbnm ON nm LP idxlist RP */
{
  sqlite3CreateIndex(pParse, &yymsp[-6].minor.yy0, &yymsp[-5].minor.yy0, 
                     sqlite3SrcListAppend(pParse->db,0,&yymsp[-3].minor.yy0,0), yymsp[-1].minor.yy442, yymsp[-9].minor.yy392,
                      &yymsp[-10].minor.yy0, &yymsp[0].minor.yy0, SQLITE_SO_ASC, yymsp[-7].minor.yy392);
}
        break;
      case 243: /* uniqueflag ::= UNIQUE */
      case 296: /* raisetype ::= ABORT */ yytestcase(yyruleno==296);
{yygotominor.yy392 = OE_Abort;}
        break;
      case 244: /* uniqueflag ::= */
................................................................................
      testcase( z[0]=='\r' );
      for(i=1; sqlite3Isspace(z[i]); i++){}
      *tokenType = TK_SPACE;
      return i;
    }
    case '-': {
      if( z[1]=='-' ){
        /* IMP: R-50417-27976 -- syntax diagram for comments */
        for(i=2; (c=z[i])!=0 && c!='\n'; i++){}
        *tokenType = TK_SPACE;   /* IMP: R-22934-25134 */
        return i;
      }
      *tokenType = TK_MINUS;
      return 1;
    }
................................................................................
      return 1;
    }
    case '/': {
      if( z[1]!='*' || z[2]==0 ){
        *tokenType = TK_SLASH;
        return 1;
      }
      /* IMP: R-50417-27976 -- syntax diagram for comments */
      for(i=3, c=z[2]; (c!='*' || z[i]!='/') && (c=z[i])!=0; i++){}
      if( c ) i++;
      *tokenType = TK_SPACE;   /* IMP: R-22934-25134 */
      return i;
    }
    case '%': {
      *tokenType = TK_REM;
................................................................................
  int lastTokenParsed = -1;       /* type of the previous token */
  u8 enableLookaside;             /* Saved value of db->lookaside.bEnabled */
  sqlite3 *db = pParse->db;       /* The database connection */
  int mxSqlLen;                   /* Max length of an SQL string */


  mxSqlLen = db->aLimit[SQLITE_LIMIT_SQL_LENGTH];
  if( db->activeVdbeCnt==0 ){
    db->u1.isInterrupted = 0;
  }
  pParse->rc = SQLITE_OK;
  pParse->zTail = zSql;
  i = 0;
  assert( pzErrMsg!=0 );
  pEngine = sqlite3ParserAlloc((void*(*)(size_t))sqlite3Malloc);
................................................................................
**
**    *  Recursive calls to this routine from thread X return immediately
**       without blocking.
*/
SQLITE_API int sqlite3_initialize(void){
  MUTEX_LOGIC( sqlite3_mutex *pMaster; )       /* The main static mutex */
  int rc;                                      /* Result code */




#ifdef SQLITE_OMIT_WSD
  rc = sqlite3_wsd_init(4096, 24);
  if( rc!=SQLITE_OK ){
    return rc;
  }
#endif
................................................................................
      sqlite3GlobalConfig.isPCacheInit = 1;
      rc = sqlite3OsInit();
    }
    if( rc==SQLITE_OK ){
      sqlite3PCacheBufferSetup( sqlite3GlobalConfig.pPage, 
          sqlite3GlobalConfig.szPage, sqlite3GlobalConfig.nPage);
      sqlite3GlobalConfig.isInit = 1;



    }
    sqlite3GlobalConfig.inProgress = 0;
  }
  sqlite3_mutex_leave(sqlite3GlobalConfig.pInitMutex);

  /* Go back under the static mutex and clean up the recursive
  ** mutex to prevent a resource leak.
................................................................................
#endif
#endif

  /* Do extra initialization steps requested by the SQLITE_EXTRA_INIT
  ** compile-time option.
  */
#ifdef SQLITE_EXTRA_INIT
  if( rc==SQLITE_OK && sqlite3GlobalConfig.isInit ){
    int SQLITE_EXTRA_INIT(const char*);
    rc = SQLITE_EXTRA_INIT(0);
  }
#endif

  return rc;
}
................................................................................
        ** back to NULL pointers too.  This will cause the malloc to go
        ** back to its default implementation when sqlite3_initialize() is
        ** run.
        */
        memset(&sqlite3GlobalConfig.m, 0, sizeof(sqlite3GlobalConfig.m));
      }else{
        /* The heap pointer is not NULL, then install one of the
        ** mem5.c/mem3.c methods. If neither ENABLE_MEMSYS3 nor
        ** ENABLE_MEMSYS5 is defined, return an error.
        */
#ifdef SQLITE_ENABLE_MEMSYS3
        sqlite3GlobalConfig.m = *sqlite3MemGetMemsys3();
#endif
#ifdef SQLITE_ENABLE_MEMSYS5
        sqlite3GlobalConfig.m = *sqlite3MemGetMemsys5();
#endif
................................................................................

    case SQLITE_CONFIG_LOOKASIDE: {
      sqlite3GlobalConfig.szLookaside = va_arg(ap, int);
      sqlite3GlobalConfig.nLookaside = va_arg(ap, int);
      break;
    }
    
    /* Record a pointer to the logger funcction and its first argument.
    ** The default is NULL.  Logging is disabled if the function pointer is
    ** NULL.
    */
    case SQLITE_CONFIG_LOG: {
      /* MSVC is picky about pulling func ptrs from va lists.
      ** http://support.microsoft.com/kb/47961
      ** sqlite3GlobalConfig.xLog = va_arg(ap, void(*)(void*,int,const char*));
................................................................................
  }
  return rc;
}

/*
** Another built-in collating sequence: NOCASE. 
**
** This collating sequence is intended to be used for "case independant
** comparison". SQLite's knowledge of upper and lower case equivalents
** extends only to the 26 characters used in the English language.
**
** At the moment there is only a UTF-8 implementation.
*/
static int nocaseCollatingFunc(
  void *NotUsed,
................................................................................
  for(i=0; i<db->nDb; i++){
    Btree *p = db->aDb[i].pBt;
    if( p ){
      if( sqlite3BtreeIsInTrans(p) ){
        inTrans = 1;
      }
      sqlite3BtreeRollback(p, tripCode);
      db->aDb[i].inTrans = 0;
    }
  }
  sqlite3VtabRollback(db);
  sqlite3EndBenignMalloc();

  if( (db->flags&SQLITE_InternChanges)!=0 && db->init.busy==0 ){
    sqlite3ExpirePreparedStatements(db);
    sqlite3ResetAllSchemasOfConnection(db);
  }
  sqlite3BtreeLeaveAll(db);

  /* Any deferred constraint violations have now been resolved. */
  db->nDeferredCons = 0;



  /* If one has been configured, invoke the rollback-hook callback */
  if( db->xRollbackCallback && (inTrans || !db->autoCommit) ){
    db->xRollbackCallback(db->pRollbackArg);
  }
}

................................................................................
      case SQLITE_ERROR:              zName = "SQLITE_ERROR";             break;
      case SQLITE_INTERNAL:           zName = "SQLITE_INTERNAL";          break;
      case SQLITE_PERM:               zName = "SQLITE_PERM";              break;
      case SQLITE_ABORT:              zName = "SQLITE_ABORT";             break;
      case SQLITE_ABORT_ROLLBACK:     zName = "SQLITE_ABORT_ROLLBACK";    break;
      case SQLITE_BUSY:               zName = "SQLITE_BUSY";              break;
      case SQLITE_BUSY_RECOVERY:      zName = "SQLITE_BUSY_RECOVERY";     break;

      case SQLITE_LOCKED:             zName = "SQLITE_LOCKED";            break;
      case SQLITE_LOCKED_SHAREDCACHE: zName = "SQLITE_LOCKED_SHAREDCACHE";break;
      case SQLITE_NOMEM:              zName = "SQLITE_NOMEM";             break;
      case SQLITE_READONLY:           zName = "SQLITE_READONLY";          break;
      case SQLITE_READONLY_RECOVERY:  zName = "SQLITE_READONLY_RECOVERY"; break;
      case SQLITE_READONLY_CANTLOCK:  zName = "SQLITE_READONLY_CANTLOCK"; break;
      case SQLITE_READONLY_ROLLBACK:  zName = "SQLITE_READONLY_ROLLBACK"; break;
................................................................................
      case SQLITE_IOERR_SHMOPEN:      zName = "SQLITE_IOERR_SHMOPEN";     break;
      case SQLITE_IOERR_SHMSIZE:      zName = "SQLITE_IOERR_SHMSIZE";     break;
      case SQLITE_IOERR_SHMLOCK:      zName = "SQLITE_IOERR_SHMLOCK";     break;
      case SQLITE_IOERR_SHMMAP:       zName = "SQLITE_IOERR_SHMMAP";      break;
      case SQLITE_IOERR_SEEK:         zName = "SQLITE_IOERR_SEEK";        break;
      case SQLITE_IOERR_DELETE_NOENT: zName = "SQLITE_IOERR_DELETE_NOENT";break;
      case SQLITE_IOERR_MMAP:         zName = "SQLITE_IOERR_MMAP";        break;

      case SQLITE_CORRUPT:            zName = "SQLITE_CORRUPT";           break;
      case SQLITE_CORRUPT_VTAB:       zName = "SQLITE_CORRUPT_VTAB";      break;
      case SQLITE_NOTFOUND:           zName = "SQLITE_NOTFOUND";          break;
      case SQLITE_FULL:               zName = "SQLITE_FULL";              break;
      case SQLITE_CANTOPEN:           zName = "SQLITE_CANTOPEN";          break;
      case SQLITE_CANTOPEN_NOTEMPDIR: zName = "SQLITE_CANTOPEN_NOTEMPDIR";break;
      case SQLITE_CANTOPEN_ISDIR:     zName = "SQLITE_CANTOPEN_ISDIR";    break;
................................................................................
      case SQLITE_NOTADB:             zName = "SQLITE_NOTADB";            break;
      case SQLITE_ROW:                zName = "SQLITE_ROW";               break;
      case SQLITE_NOTICE:             zName = "SQLITE_NOTICE";            break;
      case SQLITE_NOTICE_RECOVER_WAL: zName = "SQLITE_NOTICE_RECOVER_WAL";break;
      case SQLITE_NOTICE_RECOVER_ROLLBACK:
                                zName = "SQLITE_NOTICE_RECOVER_ROLLBACK"; break;
      case SQLITE_WARNING:            zName = "SQLITE_WARNING";           break;

      case SQLITE_DONE:               zName = "SQLITE_DONE";              break;
    }
  }
  if( zName==0 ){
    static char zBuf[50];
    sqlite3_snprintf(sizeof(zBuf), zBuf, "SQLITE_UNKNOWN(%d)", origRc);
    zName = zBuf;
................................................................................
  int nOps,
  int (*xProgress)(void*), 
  void *pArg
){
  sqlite3_mutex_enter(db->mutex);
  if( nOps>0 ){
    db->xProgress = xProgress;
    db->nProgressOps = nOps;
    db->pProgressArg = pArg;
  }else{
    db->xProgress = 0;
    db->nProgressOps = 0;
    db->pProgressArg = 0;
  }
  sqlite3_mutex_leave(db->mutex);
................................................................................
  /* Check if an existing function is being overridden or deleted. If so,
  ** and there are active VMs, then return SQLITE_BUSY. If a function
  ** is being overridden/deleted but there are no active VMs, allow the
  ** operation to continue but invalidate all precompiled statements.
  */
  p = sqlite3FindFunction(db, zFunctionName, nName, nArg, (u8)enc, 0);
  if( p && p->iPrefEnc==enc && p->nArg==nArg ){
    if( db->activeVdbeCnt ){
      sqlite3Error(db, SQLITE_BUSY, 
        "unable to delete/modify user-function due to active statements");
      assert( !db->mallocFailed );
      return SQLITE_BUSY;
    }else{
      sqlite3ExpirePreparedStatements(db);
    }
................................................................................

  /* Check if this call is removing or replacing an existing collation 
  ** sequence. If so, and there are active VMs, return busy. If there
  ** are no active VMs, invalidate any pre-compiled statements.
  */
  pColl = sqlite3FindCollSeq(db, (u8)enc2, zName, 0);
  if( pColl && pColl->xCmp ){
    if( db->activeVdbeCnt ){
      sqlite3Error(db, SQLITE_BUSY, 
        "unable to delete/modify collation sequence due to active statements");
      return SQLITE_BUSY;
    }
    sqlite3ExpirePreparedStatements(db);

    /* If collation sequence pColl was created directly by a call to
................................................................................
    ** method that there may be extra parameters following the file-name.  */
    flags |= SQLITE_OPEN_URI;

    for(iIn=0; iIn<nUri; iIn++) nByte += (zUri[iIn]=='&');
    zFile = sqlite3_malloc(nByte);
    if( !zFile ) return SQLITE_NOMEM;



    /* Discard the scheme and authority segments of the URI. */
    if( zUri[5]=='/' && zUri[6]=='/' ){
      iIn = 7;
      while( zUri[iIn] && zUri[iIn]!='/' ) iIn++;

      if( iIn!=7 && (iIn!=16 || memcmp("localhost", &zUri[7], 9)) ){
        *pzErrMsg = sqlite3_mprintf("invalid uri authority: %.*s", 
            iIn-7, &zUri[7]);
        rc = SQLITE_ERROR;
        goto parse_uri_out;
      }
    }else{
      iIn = 5;
    }


    /* Copy the filename and any query parameters into the zFile buffer. 
    ** Decode %HH escape codes along the way. 
    **
    ** Within this loop, variable eState may be set to 0, 1 or 2, depending
    ** on the parsing context. As follows:
    **
................................................................................

  assert( sizeof(db->aLimit)==sizeof(aHardLimit) );
  memcpy(db->aLimit, aHardLimit, sizeof(db->aLimit));
  db->autoCommit = 1;
  db->nextAutovac = -1;
  db->szMmap = sqlite3GlobalConfig.szMmap;
  db->nextPagesize = 0;
  db->flags |= SQLITE_ShortColNames | SQLITE_AutoIndex | SQLITE_EnableTrigger



#if SQLITE_DEFAULT_FILE_FORMAT<4
                 | SQLITE_LegacyFileFmt
#endif
#ifdef SQLITE_ENABLE_LOAD_EXTENSION
                 | SQLITE_LoadExtension
#endif
#if SQLITE_DEFAULT_RECURSIVE_TRIGGERS
................................................................................
#endif

/*
** Test to see whether or not the database connection is in autocommit
** mode.  Return TRUE if it is and FALSE if not.  Autocommit mode is on
** by default.  Autocommit is disabled by a BEGIN statement and reenabled
** by the next COMMIT or ROLLBACK.
**
******* THIS IS AN EXPERIMENTAL API AND IS SUBJECT TO CHANGE ******
*/
SQLITE_API int sqlite3_get_autocommit(sqlite3 *db){
  return db->autoCommit;
}

/*
** The following routines are subtitutes for constants SQLITE_CORRUPT,
................................................................................
# define SQLITE_ENABLE_FTS3
#endif

#if !defined(SQLITE_CORE) || defined(SQLITE_ENABLE_FTS3)

/* If not building as part of the core, include sqlite3ext.h. */
#ifndef SQLITE_CORE
SQLITE_API extern const sqlite3_api_routines *sqlite3_api;
#endif

/************** Include fts3_tokenizer.h in the middle of fts3Int.h **********/
/************** Begin file fts3_tokenizer.h **********************************/
/*
** 2006 July 10
**
................................................................................
*/
#define fts3HashCount(H)  ((H)->count)

#endif /* _FTS3_HASH_H_ */

/************** End of fts3_hash.h *******************************************/
/************** Continuing where we left off in fts3Int.h ********************/













/*
** This constant controls how often segments are merged. Once there are
** FTS3_MERGE_COUNT segments of level N, they are merged into a single
** segment of level N+1.
*/
#define FTS3_MERGE_COUNT 16
................................................................................
struct Fts3Table {
  sqlite3_vtab base;              /* Base class used by SQLite core */
  sqlite3 *db;                    /* The database connection */
  const char *zDb;                /* logical database name */
  const char *zName;              /* virtual table name */
  int nColumn;                    /* number of named columns in virtual table */
  char **azColumn;                /* column names.  malloced */

  sqlite3_tokenizer *pTokenizer;  /* tokenizer for inserts and queries */
  char *zContentTbl;              /* content=xxx option, or NULL */
  char *zLanguageid;              /* languageid=xxx option, or NULL */
  u8 bAutoincrmerge;              /* True if automerge=1 */
  u32 nLeafAdd;                   /* Number of leaf blocks added this trans */

  /* Precompiled statements used by the implementation. Each of these 
................................................................................
SQLITE_PRIVATE int sqlite3Fts3Optimize(Fts3Table *);
SQLITE_PRIVATE int sqlite3Fts3SegReaderNew(int, int, sqlite3_int64,
  sqlite3_int64, sqlite3_int64, const char *, int, Fts3SegReader**);
SQLITE_PRIVATE int sqlite3Fts3SegReaderPending(
  Fts3Table*,int,const char*,int,int,Fts3SegReader**);
SQLITE_PRIVATE void sqlite3Fts3SegReaderFree(Fts3SegReader *);
SQLITE_PRIVATE int sqlite3Fts3AllSegdirs(Fts3Table*, int, int, int, sqlite3_stmt **);
SQLITE_PRIVATE int sqlite3Fts3ReadLock(Fts3Table *);
SQLITE_PRIVATE int sqlite3Fts3ReadBlock(Fts3Table*, sqlite3_int64, char **, int*, int*);

SQLITE_PRIVATE int sqlite3Fts3SelectDoctotal(Fts3Table *, sqlite3_stmt **);
SQLITE_PRIVATE int sqlite3Fts3SelectDocsize(Fts3Table *, sqlite3_int64, sqlite3_stmt **);

#ifndef SQLITE_DISABLE_FTS4_DEFERRED
SQLITE_PRIVATE void sqlite3Fts3FreeDeferredTokens(Fts3Cursor *);
................................................................................
  int bNoDocsize = 0;             /* True to omit %_docsize table */
  int bDescIdx = 0;               /* True to store descending indexes */
  char *zPrefix = 0;              /* Prefix parameter value (or NULL) */
  char *zCompress = 0;            /* compress=? parameter (or NULL) */
  char *zUncompress = 0;          /* uncompress=? parameter (or NULL) */
  char *zContent = 0;             /* content=? parameter (or NULL) */
  char *zLanguageid = 0;          /* languageid=? parameter (or NULL) */



  assert( strlen(argv[0])==4 );
  assert( (sqlite3_strnicmp(argv[0], "fts4", 4)==0 && isFts4)
       || (sqlite3_strnicmp(argv[0], "fts3", 4)==0 && !isFts4)
  );

  nDb = (int)strlen(argv[1]) + 1;
  nName = (int)strlen(argv[2]) + 1;


  aCol = (const char **)sqlite3_malloc(sizeof(const char *) * (argc-2) );








  if( !aCol ) return SQLITE_NOMEM;
  memset((void *)aCol, 0, sizeof(const char *) * (argc-2));



  /* Loop through all of the arguments passed by the user to the FTS3/4
  ** module (i.e. all the column names and special arguments). This loop
  ** does the following:
  **
  **   + Figures out the number of columns the FTSX table will have, and
  **     the number of bytes of space that must be allocated to store copies
................................................................................
      } aFts4Opt[] = {
        { "matchinfo",   9 },     /* 0 -> MATCHINFO */
        { "prefix",      6 },     /* 1 -> PREFIX */
        { "compress",    8 },     /* 2 -> COMPRESS */
        { "uncompress", 10 },     /* 3 -> UNCOMPRESS */
        { "order",       5 },     /* 4 -> ORDER */
        { "content",     7 },     /* 5 -> CONTENT */
        { "languageid", 10 }      /* 6 -> LANGUAGEID */

      };

      int iOpt;
      if( !zVal ){
        rc = SQLITE_NOMEM;
      }else{
        for(iOpt=0; iOpt<SizeofArray(aFts4Opt); iOpt++){
................................................................................

            case 6:              /* LANGUAGEID */
              assert( iOpt==6 );
              sqlite3_free(zLanguageid);
              zLanguageid = zVal;
              zVal = 0;
              break;





          }
        }
        sqlite3_free(zVal);
      }
    }

    /* Otherwise, the argument is a column name. */
................................................................................
  }
  if( rc!=SQLITE_OK ) goto fts3_init_out;

  /* Allocate and populate the Fts3Table structure. */
  nByte = sizeof(Fts3Table) +                  /* Fts3Table */
          nCol * sizeof(char *) +              /* azColumn */
          nIndex * sizeof(struct Fts3Index) +  /* aIndex */

          nName +                              /* zName */
          nDb +                                /* zDb */
          nString;                             /* Space for azColumn strings */
  p = (Fts3Table*)sqlite3_malloc(nByte);
  if( p==0 ){
    rc = SQLITE_NOMEM;
    goto fts3_init_out;
................................................................................

  p->aIndex = (struct Fts3Index *)&p->azColumn[nCol];
  memcpy(p->aIndex, aIndex, sizeof(struct Fts3Index) * nIndex);
  p->nIndex = nIndex;
  for(i=0; i<nIndex; i++){
    fts3HashInit(&p->aIndex[i].hPending, FTS3_HASH_STRING, 1);
  }


  /* Fill in the zName and zDb fields of the vtab structure. */
  zCsr = (char *)&p->aIndex[nIndex];
  p->zName = zCsr;
  memcpy(zCsr, argv[2], nName);
  zCsr += nName;
  p->zDb = zCsr;
  memcpy(zCsr, argv[1], nDb);
  zCsr += nDb;

................................................................................
    zCsr[n] = '\0';
    sqlite3Fts3Dequote(zCsr);
    p->azColumn[iCol] = zCsr;
    zCsr += n+1;
    assert( zCsr <= &((char *)p)[nByte] );
  }




















  if( (zCompress==0)!=(zUncompress==0) ){
    char const *zMiss = (zCompress==0 ? "compress" : "uncompress");
    rc = SQLITE_ERROR;
    *pzErr = sqlite3_mprintf("missing %s parameter in fts4 constructor", zMiss);
  }
  p->zReadExprlist = fts3ReadExprList(p, zUncompress, &rc);
  p->zWriteExprlist = fts3WriteExprList(p, zCompress, &rc);
  if( rc!=SQLITE_OK ) goto fts3_init_out;
................................................................................
fts3_init_out:
  sqlite3_free(zPrefix);
  sqlite3_free(aIndex);
  sqlite3_free(zCompress);
  sqlite3_free(zUncompress);
  sqlite3_free(zContent);
  sqlite3_free(zLanguageid);

  sqlite3_free((void *)aCol);

  if( rc!=SQLITE_OK ){
    if( p ){
      fts3DisconnectMethod((sqlite3_vtab *)p);
    }else if( pTokenizer ){
      pTokenizer->pModule->xDestroy(pTokenizer);
    }
  }else{
................................................................................
  int iLangidCons = -1;           /* Index of langid=x constraint, if present */

  /* By default use a full table scan. This is an expensive option,
  ** so search through the constraints to see if a more efficient 
  ** strategy is possible.
  */
  pInfo->idxNum = FTS3_FULLSCAN_SEARCH;
  pInfo->estimatedCost = 500000;
  for(i=0; i<pInfo->nConstraint; i++){
    struct sqlite3_index_constraint *pCons = &pInfo->aConstraint[i];
    if( pCons->usable==0 ) continue;

    /* A direct lookup on the rowid or docid column. Assign a cost of 1.0. */
    if( iCons<0 
     && pCons->op==SQLITE_INDEX_CONSTRAINT_EQ 
................................................................................
        p->azColumn, p->bFts4, p->nColumn, iCol, zQuery, -1, &pCsr->pExpr, 
        &p->base.zErrMsg
    );
    if( rc!=SQLITE_OK ){
      return rc;
    }

    rc = sqlite3Fts3ReadLock(p);
    if( rc!=SQLITE_OK ) return rc;

    rc = fts3EvalStart(pCsr);

    sqlite3Fts3SegmentsClose(p);
    if( rc!=SQLITE_OK ) return rc;
    pCsr->pNextId = pCsr->aDoclist;
    pCsr->iPrevId = 0;
  }

  /* Compile a SELECT statement for this cursor. For a full-table-scan, the
................................................................................
}
#endif

#if !SQLITE_CORE
/*
** Initialize API pointer table, if required.
*/



SQLITE_API int sqlite3_extension_init(
  sqlite3 *db, 
  char **pzErrMsg,
  const sqlite3_api_routines *pApi
){
  SQLITE_EXTENSION_INIT2(pApi)
  return sqlite3Fts3Init(db);
}
................................................................................
  int bFts4,                          /* True to allow FTS4-only syntax */
  int nCol,                           /* Number of entries in azCol[] */
  int iDefaultCol,                    /* Default column to query */
  const char *z, int n,               /* Text of MATCH query */
  Fts3Expr **ppExpr,                  /* OUT: Parsed query structure */
  char **pzErr                        /* OUT: Error message (sqlite3_malloc) */
){
  static const int MAX_EXPR_DEPTH = 12;
  int rc = fts3ExprParseUnbalanced(
      pTokenizer, iLangid, azCol, bFts4, nCol, iDefaultCol, z, n, ppExpr
  );
  
  /* Rebalance the expression. And check that its depth does not exceed
  ** MAX_EXPR_DEPTH.  */
  if( rc==SQLITE_OK && *ppExpr ){
    rc = fts3ExprBalance(ppExpr, MAX_EXPR_DEPTH);
    if( rc==SQLITE_OK ){
      rc = fts3ExprCheckDepth(*ppExpr, MAX_EXPR_DEPTH);
    }
  }

  if( rc!=SQLITE_OK ){
    sqlite3Fts3ExprFree(*ppExpr);
    *ppExpr = 0;
    if( rc==SQLITE_TOOBIG ){
      *pzErr = sqlite3_mprintf(
          "FTS expression tree is too large (maximum depth %d)", MAX_EXPR_DEPTH

      );
      rc = SQLITE_ERROR;
    }else if( rc==SQLITE_ERROR ){
      *pzErr = sqlite3_mprintf("malformed MATCH expression: [%s]", z);
    }
  }

................................................................................
  sqlite3_free(zCopy);
  return rc;
}


#ifdef SQLITE_TEST

/* #include <tcl.h> */
/* #include <string.h> */

/*
** Implementation of a special SQL scalar function for testing tokenizers 
** designed to be used in concert with the Tcl testing framework. This
** function must be called with two or more arguments:
**
................................................................................
    rc = sqlite3_reset(pStmt);
  }
  *pRC = rc;
}


/*
** This function ensures that the caller has obtained a shared-cache
** table-lock on the %_content table. This is required before reading
** data from the fts3 table. If this lock is not acquired first, then
** the caller may end up holding read-locks on the %_segments and %_segdir
** tables, but no read-lock on the %_content table. If this happens 
** a second connection will be able to write to the fts3 table, but
** attempting to commit those writes might return SQLITE_LOCKED or
** SQLITE_LOCKED_SHAREDCACHE (because the commit attempts to obtain 
** write-locks on the %_segments and %_segdir ** tables). 
**
** We try to avoid this because if FTS3 returns any error when committing
** a transaction, the whole transaction will be rolled back. And this is
** not what users expect when they get SQLITE_LOCKED_SHAREDCACHE. It can
** still happen if the user reads data directly from the %_segments or
** %_segdir tables instead of going through FTS3 though.
**
** This reasoning does not apply to a content=xxx table.


*/
SQLITE_PRIVATE int sqlite3Fts3ReadLock(Fts3Table *p){
  int rc;                         /* Return code */
  sqlite3_stmt *pStmt;            /* Statement used to obtain lock */


  if( p->zContentTbl==0 ){


    rc = fts3SqlStmt(p, SQL_SELECT_CONTENT_BY_ROWID, &pStmt, 0);
    if( rc==SQLITE_OK ){
      sqlite3_bind_null(pStmt, 1);
      sqlite3_step(pStmt);
      rc = sqlite3_reset(pStmt);
    }
  }else{
    rc = SQLITE_OK;
  }

  return rc;
}

/*
** FTS maintains a separate indexes for each language-id (a 32-bit integer).
................................................................................
  Fts3Table *p, 
  int iLangid, 
  sqlite3_value **apVal, 
  u32 *aSz
){
  int i;                          /* Iterator variable */
  for(i=2; i<p->nColumn+2; i++){


    const char *zText = (const char *)sqlite3_value_text(apVal[i]);
    int rc = fts3PendingTermsAdd(p, iLangid, zText, i-2, &aSz[i-2]);
    if( rc!=SQLITE_OK ){
      return rc;
    }
    aSz[p->nColumn] += sqlite3_value_bytes(apVal[i]);

  }
  return SQLITE_OK;
}

/*
** This function is called by the xUpdate() method for an INSERT operation.
** The apVal parameter is passed a copy of the apVal argument passed by
................................................................................
  rc = fts3SqlStmt(p, SQL_SELECT_CONTENT_BY_ROWID, &pSelect, &pRowid);
  if( rc==SQLITE_OK ){
    if( SQLITE_ROW==sqlite3_step(pSelect) ){
      int i;
      int iLangid = langidFromSelect(p, pSelect);
      rc = fts3PendingTermsDocid(p, iLangid, sqlite3_column_int64(pSelect, 0));
      for(i=1; rc==SQLITE_OK && i<=p->nColumn; i++){


        const char *zText = (const char *)sqlite3_column_text(pSelect, i);
        rc = fts3PendingTermsAdd(p, iLangid, zText, -1, &aSz[i-1]);
        aSz[p->nColumn] += sqlite3_column_bytes(pSelect, i);

      }
      if( rc!=SQLITE_OK ){
        sqlite3_reset(pSelect);
        *pRC = rc;
        return;
      }
      *pbFound = 1;
................................................................................
    ** following block advances it to point one byte past the end of
    ** the same offset list. */
    while( 1 ){
  
      /* The following line of code (and the "p++" below the while() loop) is
      ** normally all that is required to move pointer p to the desired 
      ** position. The exception is if this node is being loaded from disk
      ** incrementally and pointer "p" now points to the first byte passed
      ** the populated part of pReader->aNode[].
      */
      while( *p | c ) c = *p++ & 0x80;
      assert( *p==0 );
  
      if( pReader->pBlob==0 || p<&pReader->aNode[pReader->nPopulate] ) break;
      rc = fts3SegReaderIncrRead(pReader);
................................................................................
      */
      for(i=0; i<nMerge; i++){
        fts3SegReaderFirstDocid(p, apSegment[i]);
      }
      fts3SegReaderSort(apSegment, nMerge, nMerge, xCmp);
      while( apSegment[0]->pOffsetList ){
        int j;                    /* Number of segments that share a docid */
        char *pList;
        int nList;
        int nByte;
        sqlite3_int64 iDocid = apSegment[0]->iDocid;
        fts3SegReaderNextDocid(p, apSegment[0], &pList, &nList);
        j = 1;
        while( j<nMerge
            && apSegment[j]->pOffsetList
            && apSegment[j]->iDocid==iDocid
................................................................................

    while( rc==SQLITE_OK && SQLITE_ROW==sqlite3_step(pStmt) ){
      int iCol;
      int iLangid = langidFromSelect(p, pStmt);
      rc = fts3PendingTermsDocid(p, iLangid, sqlite3_column_int64(pStmt, 0));
      memset(aSz, 0, sizeof(aSz[0]) * (p->nColumn+1));
      for(iCol=0; rc==SQLITE_OK && iCol<p->nColumn; iCol++){

        const char *z = (const char *) sqlite3_column_text(pStmt, iCol+1);
        rc = fts3PendingTermsAdd(p, iLangid, z, iCol, &aSz[iCol]);
        aSz[p->nColumn] += sqlite3_column_bytes(pStmt, iCol+1);

      }
      if( p->bHasDocsize ){
        fts3InsertDocsize(&rc, p, aSz);
      }
      if( rc!=SQLITE_OK ){
        sqlite3_finalize(pStmt);
        pStmt = 0;
................................................................................
    sqlite3_tokenizer *pT = p->pTokenizer;
    sqlite3_tokenizer_module const *pModule = pT->pModule;
   
    assert( pCsr->isRequireSeek==0 );
    iDocid = sqlite3_column_int64(pCsr->pStmt, 0);
  
    for(i=0; i<p->nColumn && rc==SQLITE_OK; i++){

      const char *zText = (const char *)sqlite3_column_text(pCsr->pStmt, i+1);
      sqlite3_tokenizer_cursor *pTC = 0;
  
      rc = sqlite3Fts3OpenTokenizer(pT, pCsr->iLangid, zText, -1, &pTC);
      while( rc==SQLITE_OK ){
        char const *zToken;       /* Buffer containing token */
        int nToken = 0;           /* Number of bytes in token */
        int iDum1 = 0, iDum2 = 0; /* Dummy variables */
        int iPos = 0;             /* Position of token in zText */
  
        rc = pModule->xNext(pTC, &zToken, &nToken, &iDum1, &iDum2, &iPos);
        for(pDef=pCsr->pDeferred; pDef && rc==SQLITE_OK; pDef=pDef->pNext){
          Fts3PhraseToken *pPT = pDef->pToken;
          if( (pDef->iCol>=p->nColumn || pDef->iCol==i)
           && (pPT->bFirst==0 || iPos==0)
           && (pPT->n==nToken || (pPT->isPrefix && pPT->n<nToken))
           && (0==memcmp(zToken, pPT->z, pPT->n))
          ){
            fts3PendingListAppend(&pDef->pList, iDocid, i, iPos, &rc);
          }
        }
      }
      if( pTC ) pModule->xClose(pTC);
      if( rc==SQLITE_DONE ) rc = SQLITE_OK;
    }
  

    for(pDef=pCsr->pDeferred; pDef && rc==SQLITE_OK; pDef=pDef->pNext){
      if( pDef->pList ){
        rc = fts3PendingListAppendVarint(&pDef->pList, 0);
      }
    }
  }

................................................................................
  if( aSzDel==0 ){
    rc = SQLITE_NOMEM;
    goto update_out;
  }
  aSzIns = &aSzDel[p->nColumn+1];
  memset(aSzDel, 0, sizeof(aSzDel[0])*(p->nColumn+1)*2);




  /* If this is an INSERT operation, or an UPDATE that modifies the rowid
  ** value, then this operation requires constraint handling.
  **
  ** If the on-conflict mode is REPLACE, this means that the existing row
  ** should be deleted from the database before inserting the new row. Or,
  ** if the on-conflict mode is other than REPLACE, then this method must
  ** detect the conflict and return SQLITE_CONSTRAINT before beginning to
................................................................................
    char *zNew = sqlite3_realloc(pStr->z, nAlloc);
    if( !zNew ){
      return SQLITE_NOMEM;
    }
    pStr->z = zNew;
    pStr->nAlloc = nAlloc;
  }


  /* Append the data to the string buffer. */
  memcpy(&pStr->z[pStr->n], zAppend, nAppend);
  pStr->n += nAppend;
  pStr->z[pStr->n] = '\0';

  return SQLITE_OK;
................................................................................
    0x02A00801, 0x02A01801, 0x02A02C01, 0x02A08C09, 0x02A0D804,
    0x02A1D004, 0x02A20002, 0x02A2D011, 0x02A33802, 0x02A38012,
    0x02A3E003, 0x02A4980A, 0x02A51C0D, 0x02A57C01, 0x02A60004,
    0x02A6CC1B, 0x02A77802, 0x02A8A40E, 0x02A90C01, 0x02A93002,
    0x02A97004, 0x02A9DC03, 0x02A9EC01, 0x02AAC001, 0x02AAC803,
    0x02AADC02, 0x02AAF802, 0x02AB0401, 0x02AB7802, 0x02ABAC07,
    0x02ABD402, 0x02AF8C0B, 0x03600001, 0x036DFC02, 0x036FFC02,
    0x037FFC02, 0x03E3FC01, 0x03EC7801, 0x03ECA401, 0x03EEC810,
    0x03F4F802, 0x03F7F002, 0x03F8001A, 0x03F88007, 0x03F8C023,
    0x03F95013, 0x03F9A004, 0x03FBFC01, 0x03FC040F, 0x03FC6807,
    0x03FCEC06, 0x03FD6C0B, 0x03FF8007, 0x03FFA007, 0x03FFE405,
    0x04040003, 0x0404DC09, 0x0405E411, 0x0406400C, 0x0407402E,
    0x040E7C01, 0x040F4001, 0x04215C01, 0x04247C01, 0x0424FC01,
    0x04280403, 0x04281402, 0x04283004, 0x0428E003, 0x0428FC01,
    0x04294009, 0x0429FC01, 0x042CE407, 0x04400003, 0x0440E016,
    0x04420003, 0x0442C012, 0x04440003, 0x04449C0E, 0x04450004,
    0x04460003, 0x0446CC0E, 0x04471404, 0x045AAC0D, 0x0491C004,
    0x05BD442E, 0x05BE3C04, 0x074000F6, 0x07440027, 0x0744A4B5,
    0x07480046, 0x074C0057, 0x075B0401, 0x075B6C01, 0x075BEC01,
    0x075C5401, 0x075CD401, 0x075D3C01, 0x075DBC01, 0x075E2401,
    0x075EA401, 0x075F0C01, 0x07BBC002, 0x07C0002C, 0x07C0C064,
    0x07C2800F, 0x07C2C40E, 0x07C3040F, 0x07C3440F, 0x07C4401F,
    0x07C4C03C, 0x07C5C02B, 0x07C7981D, 0x07C8402B, 0x07C90009,
    0x07C94002, 0x07CC0021, 0x07CCC006, 0x07CCDC46, 0x07CE0014,
    0x07CE8025, 0x07CF1805, 0x07CF8011, 0x07D0003F, 0x07D10001,
    0x07D108B6, 0x07D3E404, 0x07D4003E, 0x07D50004, 0x07D54018,
    0x07D7EC46, 0x07D9140B, 0x07DA0046, 0x07DC0074, 0x38000401,
    0x38008060, 0x380400F0, 0x3C000001, 0x3FFFF401, 0x40000001,
    0x43FFF401,
  };
  static const unsigned int aAscii[4] = {
    0xFFFFFFFF, 0xFC00FFFF, 0xF8000001, 0xF8000001,
  };

  if( c<128 ){
    return ( (aAscii[c >> 5] & (1 << (c & 0x001F)))==0 );
................................................................................
  ** the context object when it is no longer required.  */
  return sqlite3_create_function_v2(db, zGeom, -1, SQLITE_ANY, 
      (void *)pGeomCtx, geomCallback, 0, 0, doSqlite3Free
  );
}

#if !SQLITE_CORE



SQLITE_API int sqlite3_extension_init(
  sqlite3 *db,
  char **pzErrMsg,
  const sqlite3_api_routines *pApi
){
  SQLITE_EXTENSION_INIT2(pApi)
  return sqlite3RtreeInit(db);
}
................................................................................
**
**   * An implementation of the SQL regexp() function (and hence REGEXP
**     operator) using the ICU uregex_XX() APIs.
**
**   * Implementations of the SQL scalar upper() and lower() functions
**     for case mapping.
**
**   * Integration of ICU and SQLite collation seqences.
**
**   * An implementation of the LIKE operator that uses ICU to 
**     provide case-independent matching.
*/

#if !defined(SQLITE_CORE) || defined(SQLITE_ENABLE_ICU)

................................................................................
    );
  }

  return rc;
}

#if !SQLITE_CORE



SQLITE_API int sqlite3_extension_init(
  sqlite3 *db, 
  char **pzErrMsg,
  const sqlite3_api_routines *pApi
){
  SQLITE_EXTENSION_INIT2(pApi)
  return sqlite3IcuInit(db);
}


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1
2
3
4
5
6
7
8
9
10
...
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
...
397
398
399
400
401
402
403



404
405
406
407
408
409
410
...
426
427
428
429
430
431
432
433
434

435






436
437

438







439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
...
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
...
534
535
536
537
538
539
540
541
542
543
544




545
546

547
548
549
550
551
552
553
...
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
....
1023
1024
1025
1026
1027
1028
1029
1030
1031
1032
1033
1034
1035
1036
1037
1038
1039
1040
....
1046
1047
1048
1049
1050
1051
1052
1053
1054
1055
1056
1057
1058
1059
1060
....
3105
3106
3107
3108
3109
3110
3111
3112
3113
3114
3115
3116
3117
3118
3119
3120
3121
3122
....
4728
4729
4730
4731
4732
4733
4734
4735
4736
4737
4738
4739
4740
4741
4742
4743
4744

4745
4746
4747
4748
4749

4750
4751
4752

4753
4754
4755
4756
4757
4758
4759
4760
4761

4762
4763
4764
4765
4766
4767



4768
4769
4770
4771
4772
4773
4774
4775

4776
4777
4778
4779
4780
4781
4782
4783
4784
....
5075
5076
5077
5078
5079
5080
5081
5082
5083
5084
5085
5086
5087
5088
5089
5090
5091
5092
5093
5094
5095
5096
5097
5098
5099
5100
5101
5102
5103
5104
5105
5106
5107
5108
5109
5110
5111
....
5683
5684
5685
5686
5687
5688
5689
5690
5691
5692
5693
5694
5695
5696
5697
5698
5699
5700
5701
5702
5703
5704
5705
5706
5707
5708
5709
5710
5711
5712
5713
....
6812
6813
6814
6815
6816
6817
6818
6819
6820
6821
6822
6823
6824
6825
6826
6827
6828
6829
6830
6831
6832
6833
6834
6835
6836
6837
6838
6839
6840
6841
6842
6843
6844
6845
....
6885
6886
6887
6888
6889
6890
6891
6892
6893
6894
6895
6896
6897
6898
6899
6900
6901
6902
6903
6904
6905
6906
6907
6908
6909
6910
6911
6912
6913
....
7778
7779
7780
7781
7782
7783
7784
7785
7786
7787
7788
7789
7790
7791
7792
....
8179
8180
8181
8182
8183
8184
8185
8186
8187
8188
8189
8190
8191
8192
8193
8194
8195
8196
8197
8198
....
8510
8511
8512
8513
8514
8515
8516

8517

8518
8519
8520
8521
8522
8523
8524
....
8585
8586
8587
8588
8589
8590
8591
8592
8593
8594
8595
8596
8597
8598
8599
....
8809
8810
8811
8812
8813
8814
8815

8816
8817
8818
8819
8820
8821
8822
....
8832
8833
8834
8835
8836
8837
8838

8839
8840
8841
8842
8843
8844
8845
....
8885
8886
8887
8888
8889
8890
8891

8892
8893
8894
8895
8896
8897
8898
....
8941
8942
8943
8944
8945
8946
8947
8948
8949
8950
8951
8952
8953
8954
8955
8956
8957
8958
8959
8960
8961
8962
8963
8964
8965
8966
8967
8968
8969


8970
8971
8972
8973
8974
8975
8976
8977






8978





8979
8980
8981











8982
8983
8984




8985
8986
8987


8988
8989
8990
8991



8992
8993
8994
8995
8996
8997
8998
8999
9000
9001
9002
9003
9004
9005
9006
9007
9008
9009
9010
9011
9012
9013
9014
9015
9016
9017
9018
9019
9020
9021
9022
9023
9024
9025
9026
9027
9028
9029
9030
9031
9032
9033
9034
9035
9036
9037
9038
9039
9040
9041
9042
9043
9044
9045
9046
9047
9048



9049
9050
9051
9052
9053
9054
9055
9056
9057
9058
9059
9060
9061
9062
9063
9064
9065
9066
9067
9068
9069
9070
9071
9072
9073
9074
9075

9076



9077
9078
9079
9080
9081
9082
9083
9084

9085
9086
9087
9088
9089
9090
9091
9092
9093
9094
9095
9096
9097
9098
9099
....
9105
9106
9107
9108
9109
9110
9111
9112
9113
9114
9115
9116

9117
9118
9119

9120
9121
9122
9123
9124
9125
9126
9127

9128
9129
9130
9131
9132
9133
9134
9135
9136
....
9172
9173
9174
9175
9176
9177
9178
9179
9180
9181
9182
9183
9184
9185
9186
....
9286
9287
9288
9289
9290
9291
9292
9293
9294
9295
9296
9297
9298
9299
9300
9301
9302
9303
9304
9305
9306
9307
9308
9309
9310
9311
9312
9313
....
9327
9328
9329
9330
9331
9332
9333
9334
9335
9336
9337
9338
9339
9340
9341
....
9956
9957
9958
9959
9960
9961
9962

9963
9964
9965
9966
9967
9968
9969
.....
10101
10102
10103
10104
10105
10106
10107
10108
10109
10110
10111
10112
10113
10114
10115
10116
10117
10118
.....
10140
10141
10142
10143
10144
10145
10146
10147
10148
10149
10150
10151
10152
10153
10154
.....
10158
10159
10160
10161
10162
10163
10164
10165
10166
10167
10168
10169
10170
10171
10172
.....
10190
10191
10192
10193
10194
10195
10196
10197
10198
10199
10200
10201
10202
10203
10204
10205
10206
10207
10208
10209
10210
10211
10212
10213


10214
10215
10216
10217
10218
10219
10220
10221
10222
10223
10224
10225
10226
10227
10228
10229
10230
10231
.....
10234
10235
10236
10237
10238
10239
10240
10241
10242
10243
10244
10245
10246
10247
10248
10249
.....
10364
10365
10366
10367
10368
10369
10370
10371
10372
10373
10374
10375
10376
10377
10378
.....
10683
10684
10685
10686
10687
10688
10689
10690
10691
10692
10693
10694
10695
10696
10697
10698
10699
10700
10701
10702
10703
10704
10705
10706
.....
10761
10762
10763
10764
10765
10766
10767
10768
10769
10770
10771
10772
10773
10774
10775
10776
10777
10778
10779
10780
10781
.....
11113
11114
11115
11116
11117
11118
11119
11120
11121
11122
11123
11124
11125
11126
11127
11128
11129
11130
11131
.....
11138
11139
11140
11141
11142
11143
11144
11145
11146
11147
11148
11149
11150
11151
11152
11153
.....
11177
11178
11179
11180
11181
11182
11183









































































11184
11185
11186
11187
11188
11189
11190
11191
11192
11193
11194
11195
11196
11197
11198
11199
11200



11201


11202



















11203
11204
11205
11206
11207
11208
11209
.....
11225
11226
11227
11228
11229
11230
11231
11232
11233
11234
11235
11236
11237
11238
11239
.....
11240
11241
11242
11243
11244
11245
11246
11247

11248
11249
11250
11251
11252
11253
11254
.....
11268
11269
11270
11271
11272
11273
11274
11275
11276
11277
11278
11279
11280
11281
11282
.....
11295
11296
11297
11298
11299
11300
11301
11302
11303
11304
11305
11306
11307
11308
11309
.....
11417
11418
11419
11420
11421
11422
11423
11424
11425
11426
11427
11428
11429
11430
11431
11432
11433
11434
11435
11436
11437
11438
11439
11440
11441
.....
11455
11456
11457
11458
11459
11460
11461
11462
11463
11464
11465
11466
11467
11468
11469
.....
11643
11644
11645
11646
11647
11648
11649

11650

11651
11652
11653
11654
11655
11656
11657
11658
11659
11660
11661
.....
12010
12011
12012
12013
12014
12015
12016
12017
12018
12019
12020
12021
12022
12023
12024
.....
12026
12027
12028
12029
12030
12031
12032
12033
12034
12035
12036
12037
12038
12039
12040
12041
12042
12043
12044
12045
.....
12058
12059
12060
12061
12062
12063
12064
12065
12066
12067
12068
12069
12070
12071
12072
12073
12074
.....
12087
12088
12089
12090
12091
12092
12093
12094
12095
12096
12097
12098
12099
12100
12101
.....
12290
12291
12292
12293
12294
12295
12296
12297
12298
12299
12300
12301
12302
12303
12304
.....
12310
12311
12312
12313
12314
12315
12316
12317
12318
12319
12320
12321
12322
12323
12324
.....
12372
12373
12374
12375
12376
12377
12378
12379
12380
12381
12382
12383
12384
12385
12386
12387
12388
12389
12390
12391
12392
12393
.....
13264
13265
13266
13267
13268
13269
13270
13271
13272
13273
13274
13275
13276
13277
13278
13279
13280
.....
13453
13454
13455
13456
13457
13458
13459

13460
13461
13462
13463
13464
13465



13466



13467
13468
13469
13470
13471

13472
13473
13474
13475
13476
13477
13478
13479
.....
13483
13484
13485
13486
13487
13488
13489

13490
13491
13492
13493
13494
13495
13496
13497
13498
13499
13500
13501
13502
13503
13504
.....
13558
13559
13560
13561
13562
13563
13564
13565
13566
13567
13568
13569
13570
13571
13572
13573
13574
13575
13576
13577
13578
13579
13580
13581
13582
13583
13584
13585
13586
.....
13589
13590
13591
13592
13593
13594
13595
13596
13597
13598
13599
13600
13601
13602
13603
.....
13613
13614
13615
13616
13617
13618
13619
13620
13621
13622
13623
13624
13625
13626
13627
.....
13933
13934
13935
13936
13937
13938
13939
13940
13941
13942
13943
13944
13945
13946
13947
13948
13949
13950
13951
13952
13953
13954
13955
13956
.....
17243
17244
17245
17246
17247
17248
17249
17250
17251
17252
17253
17254
17255
17256
17257
17258
17259
17260
17261
17262
17263
.....
17345
17346
17347
17348
17349
17350
17351
17352
17353
17354
17355
17356
17357
17358
17359
.....
17467
17468
17469
17470
17471
17472
17473
17474
17475
17476
17477
17478
17479
17480
17481
.....
19899
19900
19901
19902
19903
19904
19905
19906
19907
19908
19909
19910
19911
19912
19913
.....
19953
19954
19955
19956
19957
19958
19959





19960

19961
19962
19963
19964
19965
19966
19967
.....
20008
20009
20010
20011
20012
20013
20014
20015
20016
20017
20018
20019
20020
20021
20022
20023
20024
20025
.....
20146
20147
20148
20149
20150
20151
20152
20153
20154
20155
20156
20157
20158
20159
20160
.....
20224
20225
20226
20227
20228
20229
20230
20231
20232
20233
20234
20235
20236
20237
20238
20239
20240



20241
20242
20243
20244
20245
20246
20247
20248
20249
20250
20251
20252
20253
20254
20255
20256
20257
20258
20259
20260
20261
20262
20263
20264
20265
20266
20267
20268
20269
20270
20271
20272
20273
20274
20275
20276
.....
20290
20291
20292
20293
20294
20295
20296
20297
20298
20299
20300
20301
20302
20303
20304
.....
20321
20322
20323
20324
20325
20326
20327
20328

20329
20330
20331
20332
20333
20334
20335
.....
20338
20339
20340
20341
20342
20343
20344
20345
20346
20347
20348
20349
20350
20351
20352
.....
20535
20536
20537
20538
20539
20540
20541
20542













20543

20544
20545

20546
20547
20548
20549
20550
20551
20552
20553
.....
20554
20555
20556
20557
20558
20559
20560
20561
20562
20563
20564
20565
20566
20567
20568
20569
20570
20571
.....
20586
20587
20588
20589
20590
20591
20592
20593

20594
20595
20596
20597
20598
20599
20600













20601
20602
20603
20604
20605
20606
20607
.....
22686
22687
22688
22689
22690
22691
22692
22693
22694
22695
22696
22697
22698
22699
22700
22701
22702
22703
22704
22705
22706
22707
22708
22709
22710
22711
22712
22713
22714
22715
22716
22717
22718
22719
22720
22721
22722
22723
22724
22725
22726
22727
22728
22729
22730
22731
22732
22733
22734
22735
22736
22737
22738
22739
22740
22741
22742
22743
22744
22745
22746
22747
22748
22749
22750
22751
22752
22753
22754
22755
22756
22757
22758
22759
22760
22761
22762
22763
22764
22765
22766
22767
22768
22769
22770
22771
22772
22773
22774
22775
22776
22777
22778
22779
22780
22781
22782
22783
22784
22785
22786
22787
22788
22789
22790
22791
22792
22793
22794
22795
22796
22797
22798
22799
22800
22801
22802
22803
22804
22805
22806
22807
22808
22809
22810
22811
22812
22813
22814
22815
22816
22817
22818
22819
22820
22821
22822
22823
22824
22825
22826
22827
22828
22829
22830
22831
22832
22833
22834
22835
22836
22837
22838
22839
.....
22890
22891
22892
22893
22894
22895
22896







22897
22898
22899
22900
22901
22902
22903
.....
26820
26821
26822
26823
26824
26825
26826
26827
26828
26829
26830
26831
26832
26833
26834
26835
26836
26837
26838
26839
26840
26841
26842
26843
26844
26845
26846
.....
30482
30483
30484
30485
30486
30487
30488
30489
30490
30491
30492
30493
30494
30495
30496
.....
30758
30759
30760
30761
30762
30763
30764







30765
30766
30767
30768
30769
30770
30771
.....
30903
30904
30905
30906
30907
30908
30909
30910
30911
30912
30913
30914
30915
30916
30917
.....
33484
33485
33486
33487
33488
33489
33490
33491
33492
33493
33494
33495
33496
33497
33498
33499
33500
.....
33570
33571
33572
33573
33574
33575
33576
33577
33578
33579
33580
33581
33582
33583
33584
33585
33586
33587
33588
33589
33590
33591
33592
33593
33594
33595
33596
33597
.....
34369
34370
34371
34372
34373
34374
34375
34376
34377
34378
34379

34380
34381
34382
34383
34384
34385
34386
.....
34541
34542
34543
34544
34545
34546
34547
34548
34549
34550
34551
34552
34553
34554
34555
34556
34557
34558
34559
34560
34561
34562
34563
34564
34565
34566
34567
34568
34569
34570
34571
34572
34573
34574
34575


34576
34577
34578
34579
34580
34581
34582
34583
34584
34585
34586
34587
34588
34589
34590
34591
34592
34593
34594
34595
34596
34597
34598
34599
34600
34601
34602
34603
34604
34605
34606
34607
34608
34609
34610
34611
34612
34613
34614
34615
34616
34617
34618
34619
34620
34621
34622
34623
34624
34625
34626
34627
34628
34629
34630
34631
34632
34633
34634
34635
34636
34637
34638
.....
34710
34711
34712
34713
34714
34715
34716
34717
34718
34719
34720
34721
34722
34723
34724
.....
34776
34777
34778
34779
34780
34781
34782

34783
34784
34785
34786
34787
34788
34789
34790
.....
35207
35208
35209
35210
35211
35212
35213
35214
35215
35216
35217
35218
35219
35220
35221
35222
35223

35224
35225
35226
35227
35228
35229
35230
35231
35232
35233
35234
35235
35236
35237
35238
35239
35240
35241
35242
35243
35244
.....
35572
35573
35574
35575
35576
35577
35578
35579
35580
35581
35582
35583
35584
35585
35586
.....
37219
37220
37221
37222
37223
37224
37225
37226
37227
37228
37229
37230
37231
37232
37233
.....
37422
37423
37424
37425
37426
37427
37428
37429
37430
37431
37432
37433
37434
37435
37436
.....
38783
38784
38785
38786
38787
38788
38789
38790
38791
38792
38793
38794
38795
38796
38797
38798
38799
38800
38801
38802
38803
.....
38856
38857
38858
38859
38860
38861
38862
38863
38864
38865
38866
38867
38868
38869
38870
38871
38872
38873
38874
38875
38876
38877
38878
38879
38880
38881
38882
38883
38884
.....
38974
38975
38976
38977
38978
38979
38980

38981
38982
38983
38984
38985
38986
38987
.....
39352
39353
39354
39355
39356
39357
39358

39359
39360
39361
39362
39363
39364
39365
39366
39367
39368
39369
39370
39371
39372
39373
39374
39375
39376
.....
40154
40155
40156
40157
40158
40159
40160
40161
40162
40163
40164
40165
40166
40167
40168
.....
40637
40638
40639
40640
40641
40642
40643
40644
40645
40646
40647
40648
40649
40650
40651
40652
40653
40654
40655
.....
41208
41209
41210
41211
41212
41213
41214






41215
41216
41217
41218
41219
41220
41221
.....
41715
41716
41717
41718
41719
41720
41721
41722
41723

41724
41725
41726
41727
41728
41729
41730
41731
41732
.....
41740
41741
41742
41743
41744
41745
41746
41747
41748
41749
41750
41751
41752
41753
41754
41755
41756
41757
41758
41759
.....
41786
41787
41788
41789
41790
41791
41792
41793
41794
41795


41796
41797
41798
41799
41800
41801
41802
41803
41804
41805
41806
41807
41808
41809
41810
41811
41812
41813
41814
41815
41816
41817
41818
41819
41820
41821
41822
41823
41824
41825
41826
41827
41828
41829
.....
42558
42559
42560
42561
42562
42563
42564
42565
42566
42567
42568
42569
42570
42571
42572
42573
.....
42716
42717
42718
42719
42720
42721
42722
42723
42724
42725
42726
42727
42728
42729
42730
42731
42732
42733
42734
42735
42736
42737
42738
42739
42740
42741
42742
42743
42744
42745
42746
42747
42748
42749
42750
42751
42752
42753
.....
43530
43531
43532
43533
43534
43535
43536
43537
43538
43539
43540
43541
43542
43543
43544
.....
43561
43562
43563
43564
43565
43566
43567
43568
43569
43570
43571
43572
43573
43574
43575
43576
43577
43578
43579
43580
43581
43582
43583
43584
43585
43586
43587
.....
44093
44094
44095
44096
44097
44098
44099
44100
44101
44102
44103
44104
44105
44106
44107
44108
44109
44110
44111
44112
44113
.....
44158
44159
44160
44161
44162
44163
44164
44165
44166
44167
44168
44169
44170
44171
44172
44173
.....
44940
44941
44942
44943
44944
44945
44946

44947
44948
44949
44950
44951
44952
44953
44954
44955
44956
44957
44958
44959
44960
44961
44962
44963
44964
44965
44966
44967
44968
44969
44970
44971
44972
44973
44974
.....
45515
45516
45517
45518
45519
45520
45521















45522
45523
45524
45525
45526
45527
45528
.....
47983
47984
47985
47986
47987
47988
47989
47990
47991
47992
47993
47994
47995
47996
47997
.....
49155
49156
49157
49158
49159
49160
49161



49162
49163
49164
49165
49166
49167
49168
49169
49170
49171
49172
49173
49174
49175
49176
49177
49178
49179
49180
49181
.....
49184
49185
49186
49187
49188
49189
49190
49191
49192
49193
49194
49195
49196
49197
49198
49199
49200
.....
50300
50301
50302
50303
50304
50305
50306
50307
50308
50309
50310
50311
50312
50313
50314
50315
50316
.....
50328
50329
50330
50331
50332
50333
50334
50335
50336
50337
50338
50339
50340
50341
50342
.....
50516
50517
50518
50519
50520
50521
50522
50523
50524
50525
50526
50527
50528
50529
50530
50531
.....
50795
50796
50797
50798
50799
50800
50801
50802
50803
50804
50805
50806
50807
50808
50809
.....
51161
51162
51163
51164
51165
51166
51167
51168

51169
51170
51171


51172

51173
51174
51175
51176
51177
51178
51179
51180
.....
51214
51215
51216
51217
51218
51219
51220
51221
51222
51223
51224
51225
51226
51227
51228
51229
51230
51231
51232
51233
51234
51235
51236
51237
.....
51743
51744
51745
51746
51747
51748
51749
51750
51751
51752


51753
51754
51755

51756

51757
51758
51759
51760
51761
51762
51763
51764
.....
51956
51957
51958
51959
51960
51961
51962
51963
51964
51965
51966
51967
51968
51969
51970
.....
52538
52539
52540
52541
52542
52543
52544
52545
52546
52547
52548
52549
52550
52551
52552
.....
52622
52623
52624
52625
52626
52627
52628
52629
52630
52631
52632
52633
52634
52635
52636
.....
52733
52734
52735
52736
52737
52738
52739
52740
52741
52742
52743
52744
52745
52746
52747
.....
52848
52849
52850
52851
52852
52853
52854
52855
52856
52857
52858
52859
52860
52861
52862
52863
52864
52865
52866
52867
52868
.....
53021
53022
53023
53024
53025
53026
53027
53028
53029
53030
53031
53032
53033
53034
53035
.....
53456
53457
53458
53459
53460
53461
53462
53463
53464
53465
53466
53467
53468
53469
53470
.....
53678
53679
53680
53681
53682
53683
53684
53685
53686
53687
53688
53689
53690
53691
53692
.....
53862
53863
53864
53865
53866
53867
53868
53869
53870
53871
53872
53873
53874
53875
53876
53877
.....
53980
53981
53982
53983
53984
53985
53986
53987
53988
53989
53990
53991
53992
53993
53994
53995
.....
54376
54377
54378
54379
54380
54381
54382
54383
54384
54385
54386
54387
54388
54389
54390

54391
54392
54393
54394
54395
54396
54397
54398
54399
54400
54401
54402
54403
54404
54405
54406
54407
54408
54409
54410
54411
54412
.....
54416
54417
54418
54419
54420
54421
54422
54423
54424
54425
54426
54427
54428
54429
54430
54431
54432
54433
.....
54461
54462
54463
54464
54465
54466
54467
54468
54469
54470
54471
54472
54473
54474
54475
54476
54477

54478
54479
54480
54481
54482
54483
54484
54485
54486
54487
54488
54489
54490
54491
54492
54493
54494
54495
54496
54497
54498
54499
54500
54501
54502
54503
54504
54505
54506
54507
54508
.....
54618
54619
54620
54621
54622
54623
54624
54625
54626
54627
54628
54629
54630
54631
54632
.....
54682
54683
54684
54685
54686
54687
54688
54689
54690
54691
54692
54693
54694
54695
54696
.....
54761
54762
54763
54764
54765
54766
54767
54768
54769
54770
54771
54772
54773
54774
54775
54776
.....
54794
54795
54796
54797
54798
54799
54800
54801
54802
54803
54804
54805
54806
54807
54808
.....
54810
54811
54812
54813
54814
54815
54816
54817
54818
54819
54820
54821
54822
54823
54824
54825
54826
54827
54828
54829
54830
54831
54832
54833
54834
54835
54836
54837
54838
.....
54892
54893
54894
54895
54896
54897
54898
54899
54900
54901
54902
54903
54904
54905
54906
.....
54919
54920
54921
54922
54923
54924
54925
54926
54927
54928
54929
54930
54931
54932
54933
.....
54965
54966
54967
54968
54969
54970
54971
54972
54973
54974
54975
54976
54977
54978
54979
.....
56864
56865
56866
56867
56868
56869
56870
56871
56872
56873
56874
56875
56876
56877
56878
.....
56885
56886
56887
56888
56889
56890
56891
56892
56893
56894
56895
56896
56897
56898
56899
.....
57063
57064
57065
57066
57067
57068
57069
57070
57071
57072
57073
57074
57075
57076
57077
.....
57098
57099
57100
57101
57102
57103
57104
57105
57106
57107
57108
57109
57110
57111
57112
57113
57114
57115
57116
57117
57118
57119
57120
57121
57122
.....
57323
57324
57325
57326
57327
57328
57329
57330
57331
57332
57333
57334
57335
57336
57337
.....
57520
57521
57522
57523
57524
57525
57526
57527
57528
57529
57530
57531
57532
57533
57534
.....
58102
58103
58104
58105
58106
58107
58108






58109
58110
58111
58112
58113
58114
58115
.....
58479
58480
58481
58482
58483
58484
58485
58486
58487
58488
58489
58490
58491
58492
58493
.....
59634
59635
59636
59637
59638
59639
59640
59641
59642
59643
59644


59645
59646
59647
59648
59649
59650
59651
59652
59653
59654
59655
59656
59657
59658

59659
59660
59661
59662
59663







59664
59665
59666
59667
59668
59669
59670
.....
60242
60243
60244
60245
60246
60247
60248
60249
60250
60251
60252
60253
60254
60255
60256
60257
.....
60395
60396
60397
60398
60399
60400
60401
60402
60403
60404
60405

60406
60407
60408
60409
60410
60411

60412
60413
60414
60415
60416
60417
60418
60419
60420
60421
60422
60423
60424
60425
60426
60427
60428
60429
60430
60431
60432
60433
60434
60435
60436
60437
60438
60439
60440
60441
60442
60443
60444
60445

60446
60447
60448
60449

60450
60451
60452
60453
60454
60455
60456
60457
60458
60459
60460
60461
60462
60463
60464
60465
60466

60467
60468
60469
60470
60471
60472
60473
60474
60475
.....
60587
60588
60589
60590
60591
60592
60593

60594
60595
60596
60597
60598
60599
60600
60601
.....
60623
60624
60625
60626
60627
60628
60629







60630
60631
60632
60633
60634
60635
60636
.....
60741
60742
60743
60744
60745
60746
60747
60748

60749
60750


60751
60752






60753
60754
60755
60756
60757
60758
60759
60760
60761
.....
61645
61646
61647
61648
61649
61650
61651
61652
61653
61654
61655
61656
61657
61658
61659
61660
61661
61662
.....
61757
61758
61759
61760
61761
61762
61763
61764
61765
61766
61767
61768
61769
61770
61771
.....
61976
61977
61978
61979
61980
61981
61982
61983
61984
61985
61986
61987
61988
61989
61990
61991
61992
61993
61994
61995
61996
61997
61998
61999
62000
62001
62002
62003
62004
62005
62006
62007
62008
62009
62010
62011
62012
62013
62014
62015
62016
62017
62018
62019
62020
62021
62022
62023
62024
62025
62026
.....
62066
62067
62068
62069
62070
62071
62072
62073
62074
62075
62076
62077
62078
62079
62080
.....
62085
62086
62087
62088
62089
62090
62091
62092
62093
62094
62095
62096
62097
62098
62099
62100
62101
.....
62140
62141
62142
62143
62144
62145
62146
62147
62148
62149
62150
62151
62152
62153
62154
62155
62156
.....
62195
62196
62197
62198
62199
62200
62201
62202
62203
62204
62205
62206
62207
62208
62209
.....
62220
62221
62222
62223
62224
62225
62226
62227
62228
62229
62230
62231
62232
62233
62234
62235
.....
62278
62279
62280
62281
62282
62283
62284
62285
62286
62287

62288
62289
62290
62291
62292
62293
62294
62295
62296
62297
.....
62299
62300
62301
62302
62303
62304
62305
62306
62307
62308
62309
62310
62311
62312
62313
.....
62447
62448
62449
62450
62451
62452
62453
62454
62455
62456
62457
62458
62459
62460
62461
62462
62463
62464
62465
62466
62467
62468
62469


62470
62471
62472

62473
62474
62475
62476
62477
62478
62479
62480
62481
62482
62483
62484
62485
62486
62487
62488
62489
.....
62994
62995
62996
62997
62998
62999
63000
63001
63002
63003
63004

63005
63006
63007
63008
63009
63010
63011
.....
63020
63021
63022
63023
63024
63025
63026
63027
63028
63029
63030
63031
63032
63033
63034
63035
63036
63037
63038
63039
63040
63041
63042
63043
63044
63045
63046
63047
63048
63049
63050
63051
63052
63053

63054
63055
63056
63057
63058
63059
63060
63061
63062
63063
63064
63065
.....
63266
63267
63268
63269
63270
63271
63272
63273
63274
63275
63276
63277
63278
63279
63280
.....
63297
63298
63299
63300
63301
63302
63303
63304
63305
63306
63307
63308
63309
63310
63311
63312
63313
63314
63315
63316
63317
63318
63319
63320
63321
63322
63323
63324
63325
.....
63525
63526
63527
63528
63529
63530
63531
63532
63533
63534
63535
63536
63537
63538
63539
63540
63541
63542
63543
63544
63545
63546
.....
63596
63597
63598
63599
63600
63601
63602
63603
63604
63605
63606
63607
63608
63609
63610
63611
63612
63613
63614
63615
63616
63617
63618
63619
63620
63621
63622
63623
63624
63625
63626
63627
63628
63629
63630
63631
.....
63701
63702
63703
63704
63705
63706
63707
63708
63709
63710
63711
63712
63713
63714
63715
63716
63717
63718
63719
63720
63721
63722
63723
63724
63725
63726
63727
63728
63729
63730
63731
63732
63733
63734
63735
63736
63737
63738
63739
63740
63741
63742
.....
63903
63904
63905
63906
63907
63908
63909
63910
63911
63912
63913
63914

63915
63916
63917
63918
63919
63920
63921
63922
63923
63924
63925
63926
63927
63928
63929
63930
63931
63932

63933
63934






63935
63936




63937
63938
63939
63940
63941
63942
63943
63944
63945
63946
63947
63948
63949
63950

63951
63952
63953
63954
63955
63956
63957
63958
63959
63960
63961
.....
64136
64137
64138
64139
64140
64141
64142







64143
64144
64145
64146
64147
64148
64149
.....
64612
64613
64614
64615
64616
64617
64618
64619
64620
64621
64622
64623
64624
64625
64626
64627
64628
.....
64666
64667
64668
64669
64670
64671
64672
64673
64674
64675
64676
64677
64678
64679
64680
64681
64682
.....
64706
64707
64708
64709
64710
64711
64712
64713
64714
64715
64716
64717
64718
64719
64720
.....
65501
65502
65503
65504
65505
65506
65507













65508
65509
65510
65511
65512
65513
65514
.....
65543
65544
65545
65546
65547
65548
65549
65550
65551
65552


65553
65554
65555
65556
65557
65558
65559

65560
65561
65562
65563
65564
65565
65566
.....
65998
65999
66000
66001
66002
66003
66004
66005
66006
66007
66008
66009
66010
66011
66012
66013
66014
66015
66016
66017
66018
66019
66020
66021
66022
66023
66024
66025
66026
66027
66028
.....
66035
66036
66037
66038
66039
66040
66041
66042
66043
66044
66045
66046
66047
66048
66049
.....
66061
66062
66063
66064
66065
66066
66067





















66068
66069
66070
66071
66072
66073
66074
.....
66155
66156
66157
66158
66159
66160
66161

66162
66163
66164
66165
66166
66167
66168
66169
66170
66171
66172
66173
66174
66175
66176
66177
66178
66179
66180
66181
66182
66183
66184
66185
66186
66187
66188
66189
66190
66191
66192
66193
66194
66195
66196
66197
66198
66199
66200
66201
66202
.....
66309
66310
66311
66312
66313
66314
66315
66316
66317
66318
66319
66320
66321
66322
66323
.....
66871
66872
66873
66874
66875
66876
66877

66878
66879






66880
66881
66882
66883
66884
66885
66886
66887
66888
66889
66890
66891
66892
66893
66894
66895
66896
66897
66898
66899
66900
66901
66902
66903
66904









66905
66906
66907
66908
66909
66910
66911
66912
66913
66914
66915
66916
66917
66918
66919
66920
66921
66922
66923
66924
66925
66926
66927
66928
.....
67290
67291
67292
67293
67294
67295
67296
67297
67298
67299
67300
67301
67302


67303
67304
67305
67306
67307
67308
67309
.....
68151
68152
68153
68154
68155
68156
68157
68158
68159
68160

68161
68162
68163
68164
68165
68166
68167
68168
.....
68194
68195
68196
68197
68198
68199
68200
68201
68202
68203
68204
68205
68206
68207
68208
.....
68212
68213
68214
68215
68216
68217
68218
68219
68220
68221
68222
68223
68224
68225
68226
.....
68282
68283
68284
68285
68286
68287
68288
68289
68290
68291
68292
68293
68294
68295
68296
.....
68316
68317
68318
68319
68320
68321
68322
68323
68324
68325
68326
68327
68328
68329
68330
68331
68332
68333
68334
68335
68336
68337
68338
68339
68340
68341
68342
68343
68344
.....
68388
68389
68390
68391
68392
68393
68394
68395
68396
68397
68398
68399
68400
68401
68402
68403
.....
68408
68409
68410
68411
68412
68413
68414
68415
68416
68417
68418
68419
68420
68421
68422
68423
68424
68425
68426
68427
68428
68429
.....
68430
68431
68432
68433
68434
68435
68436
68437
68438
68439
68440
68441
68442
68443
68444
.....
68448
68449
68450
68451
68452
68453
68454
68455
68456
68457
68458
68459
68460
68461
68462
.....
68473
68474
68475
68476
68477
68478
68479
68480
68481
68482
68483
68484
68485
68486
68487
.....
68503
68504
68505
68506
68507
68508
68509
68510
68511
68512
68513
68514
68515
68516
68517
.....
68556
68557
68558
68559
68560
68561
68562
68563
68564
68565
68566
68567
68568
68569
68570
.....
68654
68655
68656
68657
68658
68659
68660
68661
68662
68663
68664
68665
68666
68667
68668
68669
.....
69850
69851
69852
69853
69854
69855
69856
69857
69858
69859
69860
69861
69862
69863
69864
.....
69942
69943
69944
69945
69946
69947
69948
69949
69950
69951
69952
69953
69954
69955
69956
.....
70024
70025
70026
70027
70028
70029
70030

70031
70032
70033
70034
70035
70036
70037
70038
70039
70040
70041
70042
70043
70044
70045
70046
70047
70048
70049
70050
70051
70052
70053
70054
70055
70056
70057
70058
70059
70060
70061
70062
70063
70064
70065
70066
.....
70273
70274
70275
70276
70277
70278
70279
70280
70281
70282
70283
70284
70285
70286
70287
70288
70289
70290
70291
70292
70293
70294
70295
70296
70297
70298
.....
70333
70334
70335
70336
70337
70338
70339
70340
70341
70342
70343
70344
70345
70346
70347
.....
70382
70383
70384
70385
70386
70387
70388
70389
70390
70391
70392
70393
70394
70395
70396
.....
70535
70536
70537
70538
70539
70540
70541
70542
70543
70544
70545
70546
70547
70548
70549
.....
70598
70599
70600
70601
70602
70603
70604
70605
70606
70607
70608
70609
70610
70611
70612
70613
70614
70615
70616
70617
70618
70619
70620
70621
70622
70623
70624
.....
70830
70831
70832
70833
70834
70835
70836
70837
70838
70839
70840
70841
70842
70843
70844
70845
70846
.....
70853
70854
70855
70856
70857
70858
70859
70860
70861
70862
70863
70864
70865
70866
70867
70868
70869
.....
71059
71060
71061
71062
71063
71064
71065
71066
71067
71068
71069
71070
71071
71072
71073
.....
71111
71112
71113
71114
71115
71116
71117
71118
71119
71120
71121
71122
71123
71124
71125
.....
71135
71136
71137
71138
71139
71140
71141
71142
71143
71144
71145
71146
71147
71148
71149
.....
71194
71195
71196
71197
71198
71199
71200
71201
71202
71203
71204
71205
71206
71207
71208
.....
71214
71215
71216
71217
71218
71219
71220
71221
71222
71223
71224
71225
71226
71227
71228
.....
71291
71292
71293
71294
71295
71296
71297
71298
71299
71300
71301
71302
71303
71304
71305
.....
71337
71338
71339
71340
71341
71342
71343
71344
71345
71346
71347
71348
71349
71350
71351
71352
71353
71354
71355
71356
71357
71358
.....
71424
71425
71426
71427
71428
71429
71430
71431
71432
71433
71434
71435
71436
71437
71438
.....
71477
71478
71479
71480
71481
71482
71483
71484
71485
71486
71487
71488
71489
71490
71491
.....
71532
71533
71534
71535
71536
71537
71538
71539
71540
71541
71542
71543
71544
71545
71546
71547
71548
71549
71550
71551
71552
71553
71554
71555
.....
71562
71563
71564
71565
71566
71567
71568
71569
71570
71571
71572
71573
71574
71575
71576
71577
71578
71579
71580
71581
71582
71583
71584
71585
.....
71616
71617
71618
71619
71620
71621
71622
71623
71624
71625
71626
71627
71628
71629
71630
.....
71635
71636
71637
71638
71639
71640
71641
71642
71643
71644
71645
71646
71647
71648
71649
.....
71802
71803
71804
71805
71806
71807
71808
71809
71810
71811
71812
71813
71814
71815
71816
71817
.....
72371
72372
72373
72374
72375
72376
72377
72378
72379
72380
72381
72382
72383
72384
72385
.....
73646
73647
73648
73649
73650
73651
73652






73653
73654
73655
73656
73657
73658
73659
.....
74082
74083
74084
74085
74086
74087
74088
74089
74090
74091
74092
74093
74094
74095
74096
74097
74098
74099
74100
74101
74102
74103
74104
74105
74106
74107
74108
.....
74268
74269
74270
74271
74272
74273
74274
74275
74276
74277
74278
74279
74280
74281
74282
74283
74284
74285
74286
74287
74288
74289
74290
74291
74292
74293
74294
74295
.....
74424
74425
74426
74427
74428
74429
74430
74431
74432
74433
74434
74435
74436
74437
74438
74439
74440
74441
74442
74443
74444
74445
74446
74447
.....
74564
74565
74566
74567
74568
74569
74570
74571
74572
74573
74574
74575
74576
74577
74578
74579
74580
74581
74582
74583
74584
74585
74586
74587
74588
74589
74590
74591
74592
74593
74594
74595
74596
74597
74598
74599
74600
74601
74602
74603
74604
74605
74606
74607
74608
74609
74610
.....
74697
74698
74699
74700
74701
74702
74703
74704
74705
74706
74707
74708
74709
74710
74711
.....
74763
74764
74765
74766
74767
74768
74769
74770
74771



74772
74773
74774
74775
74776
74777
74778
74779

74780
74781
74782


74783
74784

74785
74786
74787
74788
74789
74790
74791
.....
74868
74869
74870
74871
74872
74873
74874
74875
74876
74877
74878
74879
74880
74881
74882
.....
74995
74996
74997
74998
74999
75000
75001
75002
75003
75004
75005
75006
75007
75008
75009
.....
75043
75044
75045
75046
75047
75048
75049
75050
75051
75052
75053
75054
75055
75056
75057
.....
75069
75070
75071
75072
75073
75074
75075
75076
75077
75078
75079
75080
75081
75082
75083
75084
75085
75086
75087
75088
75089
75090
75091
75092
75093
75094
75095
.....
75099
75100
75101
75102
75103
75104
75105
75106
75107
75108
75109
75110
75111
75112
75113
.....
75224
75225
75226
75227
75228
75229
75230
75231
75232
75233
75234
75235
75236
75237
75238
75239

75240
75241

75242
75243
75244
75245
75246
75247
75248
.....
75403
75404
75405
75406
75407
75408
75409
75410
75411
75412
75413
75414
75415
75416
75417
75418
75419
75420
75421
75422
75423
75424
75425
75426
75427
75428
75429
75430
75431
75432
75433
75434
75435
75436
75437
75438
75439
75440
75441
75442
75443
75444
75445
75446
75447
75448
75449
75450
75451
75452
75453
75454
75455
75456
75457
75458
.....
75563
75564
75565
75566
75567
75568
75569

75570
75571
75572
75573
75574
75575
75576
75577
.....
76368
76369
76370
76371
76372
76373
76374
76375
76376
76377
76378
76379
76380
76381
76382
.....
76727
76728
76729
76730
76731
76732
76733
76734
76735
76736
76737
76738
76739
76740
76741
.....
77046
77047
77048
77049
77050
77051
77052
77053
77054
77055
77056
77057
77058
77059
77060
77061
77062
77063
77064
77065
77066
77067
77068
.....
77096
77097
77098
77099
77100
77101
77102
77103
77104
77105
77106
77107
77108
77109
77110
.....
77141
77142
77143
77144
77145
77146
77147


77148
77149
77150
77151
77152
77153
77154
77155
77156
77157
.....
77167
77168
77169
77170
77171
77172
77173
77174


77175
77176
77177
77178
77179
77180
77181
.....
77183
77184
77185
77186
77187
77188
77189
77190
77191
77192
77193
77194
77195
77196
77197
77198
77199
77200

77201
77202
77203
77204
77205
77206
77207
.....
77210
77211
77212
77213
77214
77215
77216
77217
77218

77219
77220
77221
77222
77223
77224
77225
77226
.....
77251
77252
77253
77254
77255
77256
77257
77258
77259
77260
77261
77262
77263
77264
77265
77266
.....
77812
77813
77814
77815
77816
77817
77818
77819
77820
77821
77822
77823
77824
77825
77826
77827
77828
77829
77830
77831
77832

77833
77834
77835
77836
77837
77838
77839
.....
78953
78954
78955
78956
78957
78958
78959
78960
78961
78962
78963
78964
78965
78966
78967
.....
79249
79250
79251
79252
79253
79254
79255
79256
79257
79258
79259
79260
79261
79262
79263
79264
79265
79266
79267
79268
79269
79270
79271
79272
79273
79274
79275
79276
79277
79278
79279
79280
79281
79282
79283
79284
79285
79286
79287
79288
79289
79290
79291
79292
79293
79294
79295
79296
79297
79298
79299
79300
79301
79302
79303
79304
.....
79308
79309
79310
79311
79312
79313
79314
79315
79316
79317
79318
79319
79320
79321
79322
79323
79324
79325
79326
79327
79328
79329
79330
79331
79332
79333
79334
79335
79336
79337
79338
79339
79340
79341
79342
79343
79344
79345
79346
79347
79348
79349
79350
79351
79352
79353
79354
79355
79356
79357
79358
79359
79360
79361
79362
79363
79364
79365
79366
79367
79368
79369
79370
79371
79372
79373
79374
79375
79376
79377
79378
79379
79380
79381
.....
79552
79553
79554
79555
79556
79557
79558
79559
79560
79561
79562
79563
79564
79565
79566
.....
80554
80555
80556
80557
80558
80559
80560
80561
80562
80563
80564
80565
80566
80567
80568
.....
80969
80970
80971
80972
80973
80974
80975
80976
80977
80978
80979
80980
80981
80982
80983
.....
81029
81030
81031
81032
81033
81034
81035
81036
81037
81038
81039
81040
81041
81042
81043
.....
81189
81190
81191
81192
81193
81194
81195

81196

81197
81198
81199
81200
81201
81202
81203
81204
81205
81206
81207
81208
81209
81210
81211
81212
81213
81214
81215
81216

81217
81218
81219
81220
81221
81222




81223
81224
81225
81226
81227

81228
81229
81230
81231
81232
81233
81234
81235
81236
81237
.....
81406
81407
81408
81409
81410
81411
81412
81413
81414
81415
81416
81417
81418
81419
81420
81421
81422
81423
.....
81813
81814
81815
81816
81817
81818
81819
81820
81821
81822
81823
81824
81825
81826
81827
.....
82850
82851
82852
82853
82854
82855
82856
82857
82858
82859
82860
82861
82862
82863
82864
.....
83694
83695
83696
83697
83698
83699
83700
83701
83702
83703
83704
83705
83706
83707
83708
83709
.....
83746
83747
83748
83749
83750
83751
83752
83753
83754
83755
83756
83757
83758
83759
83760
.....
83990
83991
83992
83993
83994
83995
83996
83997



















83998
83999
84000
84001
84002
84003
84004
.....
84842
84843
84844
84845
84846
84847
84848
84849
84850
84851
84852
84853
84854
84855
84856
.....
84882
84883
84884
84885
84886
84887
84888
84889
84890
84891
84892
84893
84894
84895
84896
84897
84898
.....
84935
84936
84937
84938
84939
84940
84941
84942
84943
84944
84945
84946
84947
84948
84949
.....
84957
84958
84959
84960
84961
84962
84963

84964
84965
84966
84967
84968
84969
84970
.....
85002
85003
85004
85005
85006
85007
85008
85009
85010
85011
85012
85013
85014
85015
85016
85017
85018
85019
85020
85021
.....
85153
85154
85155
85156
85157
85158
85159
85160
85161
85162
85163
85164
85165
85166
85167
85168
85169
85170
85171
85172
85173
85174
.....
85217
85218
85219
85220
85221
85222
85223
85224
85225
85226
85227
85228
85229
85230
85231
.....
85316
85317
85318
85319
85320
85321
85322
85323
85324
85325
85326
85327
85328
85329
85330
.....
85334
85335
85336
85337
85338
85339
85340
85341
85342
85343
85344
85345


85346
85347
85348
85349
85350
85351
85352
.....
85394
85395
85396
85397
85398
85399
85400
85401
85402


85403
85404
85405
85406
85407
85408
85409
.....
85646
85647
85648
85649
85650
85651
85652
85653
85654
85655
85656
85657
85658
85659
85660
85661
85662
85663
85664
85665
85666
85667
85668
.....
86273
86274
86275
86276
86277
86278
86279


86280
86281
86282
86283



86284
86285
86286
86287
86288
86289

86290
86291
86292
86293
86294
86295
86296
86297
86298
86299
86300
.....
87366
87367
87368
87369
87370
87371
87372
87373
87374
87375
87376
87377
87378
87379
87380
87381
87382
87383
87384
87385
87386
87387
87388
87389
87390
87391
87392
87393
87394
87395
87396
87397
87398
87399
87400
87401
87402
87403
87404
87405
87406
87407
87408
87409
87410
87411
87412
87413
87414
87415
87416
87417
87418
87419
87420
87421
87422
87423
87424
87425
87426
87427
87428
87429
87430
87431
87432
.....
87677
87678
87679
87680
87681
87682
87683
87684
87685
87686
87687
87688
87689
87690
87691
.....
88336
88337
88338
88339
88340
88341
88342




88343
88344
88345
88346
88347
88348
88349
.....
88524
88525
88526
88527
88528
88529
88530
88531
88532
88533
88534
88535
88536
88537
88538
.....
88971
88972
88973
88974
88975
88976
88977
88978
88979
88980
88981
88982
88983
88984
88985
88986
88987
.....
89591
89592
89593
89594
89595
89596
89597
89598
89599
89600
89601
89602
89603
89604
89605
89606
89607
89608
.....
89985
89986
89987
89988
89989
89990
89991
89992
89993
89994
89995
89996
89997
89998
89999
90000
90001
.....
91782
91783
91784
91785
91786
91787
91788
91789
91790
91791
91792
91793
91794
91795
91796
91797
91798
91799
91800
91801
91802
91803
91804
91805
91806
91807
.....
91814
91815
91816
91817
91818
91819
91820
91821
91822
91823
91824
91825
91826
91827
91828
.....
91884
91885
91886
91887
91888
91889
91890
91891
91892
91893
91894
91895
91896
91897
91898
.....
91914
91915
91916
91917
91918
91919
91920

91921
91922
91923
91924
91925
91926
91927
91928
91929

91930
91931
91932
91933
91934
91935
91936
91937
91938
91939
91940
.....
92028
92029
92030
92031
92032
92033
92034
92035
92036
92037
92038
92039
92040
92041
92042
.....
92050
92051
92052
92053
92054
92055
92056
92057
92058
92059
92060
92061
92062
92063
92064
92065
92066
.....
92209
92210
92211
92212
92213
92214
92215
92216
92217
92218
92219
92220
92221
92222
92223
.....
92966
92967
92968
92969
92970
92971
92972
92973
92974
92975
92976
92977
92978
92979
92980
92981
92982
92983
92984
92985
92986
92987
.....
93629
93630
93631
93632
93633
93634
93635
93636
93637
93638
93639
93640
93641
93642
93643
93644
93645
93646
93647
93648
93649
93650
93651
93652
93653
93654
93655
93656
93657
93658
93659
93660
93661
93662
93663
93664
93665
93666
93667
93668
93669
93670
93671
.....
93879
93880
93881
93882
93883
93884
93885
93886
93887
93888
93889
93890
93891
93892
93893
93894
93895
93896
93897
93898
93899
93900
93901
93902
93903
93904
93905
93906
93907
93908
93909
93910
93911
93912
93913
93914
93915
93916
93917
93918
93919
93920
.....
93926
93927
93928
93929
93930
93931
93932
93933
93934
93935
93936
93937
93938
93939
93940
93941
93942
.....
93949
93950
93951
93952
93953
93954
93955
93956
93957
93958
93959
93960
93961
93962
93963
93964
93965
93966
93967
93968
93969
.....
93981
93982
93983
93984
93985
93986
93987
93988
93989
93990
93991
93992
93993
93994
93995
.....
94528
94529
94530
94531
94532
94533
94534
94535
94536
94537
94538
94539
94540
94541
94542
94543
94544
94545
94546
94547
94548
94549
94550
.....
94717
94718
94719
94720
94721
94722
94723
94724
94725
94726
94727
94728
94729
94730
94731
94732

94733
94734
94735
94736
94737
94738
94739
.....
95067
95068
95069
95070
95071
95072
95073
95074
95075
95076
95077
95078
95079
95080
95081
.....
95151
95152
95153
95154
95155
95156
95157

95158

95159
95160
95161
95162
95163
95164
95165
.....
95176
95177
95178
95179
95180
95181
95182
95183
95184
95185
95186
95187
95188
95189

95190
95191
95192
95193
95194
95195
95196
95197
95198
.....
95199
95200
95201
95202
95203
95204
95205
95206
95207
95208
95209
95210
95211
95212
95213
95214
95215
95216
95217
95218
95219
95220
95221
95222












95223
95224
95225









95226
95227
95228
95229
95230
95231
95232
95233
95234
95235
95236
95237
95238
95239
95240
.....
95517
95518
95519
95520
95521
95522
95523
95524
95525
95526
95527
95528
95529
95530
95531
95532
95533
95534
95535
95536
95537
95538
95539
95540
95541
95542
95543
95544
95545
95546
95547
95548
.....
95556
95557
95558
95559
95560
95561
95562











95563
95564
95565
95566
95567
95568
95569
.....
96158
96159
96160
96161
96162
96163
96164
96165
96166
96167
96168
96169
96170
96171
96172
.....
96180
96181
96182
96183
96184
96185
96186
96187
96188
96189
96190
96191
96192
96193
96194
.....
96375
96376
96377
96378
96379
96380
96381
96382
96383
96384
96385
96386
96387
96388
96389
96390
96391
96392
96393
96394
.....
96550
96551
96552
96553
96554
96555
96556
96557
96558
96559
96560
96561
96562
96563
96564
.....
97242
97243
97244
97245
97246
97247
97248
97249
97250
97251
97252
97253
97254
97255
97256
97257
97258
97259
97260
97261
97262
97263
97264
97265
97266
97267
97268
97269
97270
97271
97272
97273
97274
.....
97278
97279
97280
97281
97282
97283
97284

97285
97286
97287
97288
97289
97290
97291
97292
97293




97294
97295
97296

97297

97298
97299
97300
97301
97302
97303
97304
.....
97977
97978
97979
97980
97981
97982
97983
97984
97985
97986
97987
97988
97989
97990
97991
.....
97992
97993
97994
97995
97996
97997
97998
97999
98000
98001
98002
98003
98004
98005
98006
98007
.....
98187
98188
98189
98190
98191
98192
98193
98194
98195
98196
98197
98198
98199
98200
98201
98202
98203
.....
98396
98397
98398
98399
98400
98401
98402
98403

98404
98405
98406
98407




98408
98409
98410
98411
98412
98413

98414
98415
98416
98417
98418
98419
98420
.....
98775
98776
98777
98778
98779
98780
98781
98782

98783



98784
98785
98786
98787
98788
98789
98790
.....
98813
98814
98815
98816
98817
98818
98819
98820

98821



98822
98823
98824
98825
98826
98827
98828
......
100080
100081
100082
100083
100084
100085
100086

100087
100088
100089
100090
100091
100092
100093
100094
100095
100096
100097
100098
100099
......
100326
100327
100328
100329
100330
100331
100332
100333
100334
100335
100336

100337
100338
100339
100340
100341
100342
100343
......
100487
100488
100489
100490
100491
100492
100493
100494
100495
100496
100497
100498
100499
100500
100501
......
100619
100620
100621
100622
100623
100624
100625
100626
100627
100628
100629
100630
100631
100632
100633
......
100640
100641
100642
100643
100644
100645
100646
100647
100648
100649
100650
100651
100652
100653
100654
......
100680
100681
100682
100683
100684
100685
100686
100687
100688
100689
100690
100691
100692
100693
100694
......
100703
100704
100705
100706
100707
100708
100709
100710
100711
100712
100713
100714
100715

100716
100717
100718
100719
100720

100721
100722
100723
100724
100725
100726
100727
100728
100729
100730
100731
100732
100733
100734
100735
100736
100737
100738
100739
100740
100741
100742
100743
......
100762
100763
100764
100765
100766
100767
100768
100769
100770
100771
100772
100773
100774
100775
100776
100777
100778
......
100844
100845
100846
100847
100848
100849
100850
100851
100852
100853

100854
100855
100856
100857
100858
100859
100860
100861
......
101128
101129
101130
101131
101132
101133
101134
101135
101136
101137
101138
101139
101140
101141
101142
101143
......
102488
102489
102490
102491
102492
102493
102494
102495
102496
102497
102498
102499
102500
102501
102502
......
102867
102868
102869
102870
102871
102872
102873
102874
102875
102876
102877
102878
102879
102880
102881
......
102939
102940
102941
102942
102943
102944
102945
102946
102947
102948
102949
102950
102951
102952
102953
......
103408
103409
103410
103411
103412
103413
103414
103415
103416
103417
103418
103419
103420
103421
103422
......
104458
104459
104460
104461
104462
104463
104464
104465

104466
104467
104468
104469
104470
104471
104472
104473
104474
104475
104476
104477
104478


104479
104480
104481
104482
104483
104484
104485
......
104773
104774
104775
104776
104777
104778
104779
104780
104781
104782
104783
104784
104785
104786
104787
104788
104789
104790
104791
104792
104793
104794
104795
104796
104797
104798
104799
104800
104801
104802
104803
104804
104805
104806
104807
104808
104809
104810
104811
104812
104813
104814
104815
104816
104817
104818
104819
104820
104821
104822
104823
104824
104825
104826
104827
104828
104829
104830
104831
104832
104833
104834
104835
104836
104837
104838
104839
104840
104841
104842
104843
104844
104845
104846
104847
104848
104849
104850
104851
104852
104853
104854
104855
104856
104857
104858
104859
104860
104861
104862
104863
104864
104865
104866
104867
104868
104869
104870
104871
104872
104873
104874
104875
104876
104877
104878
104879
104880
104881
104882
104883
104884
104885
104886
104887
104888
104889
104890
104891
104892
104893
104894
104895
104896
104897
104898
104899
104900
104901
104902
104903
104904
104905
104906
104907
104908
104909
104910
104911
104912
104913
104914
104915
104916
104917
104918
104919
104920
104921
104922
104923
104924
104925
104926
104927
104928
104929
104930
104931
104932
104933
104934
104935
104936
104937
104938
104939
104940
104941
104942
104943
104944
104945
104946
104947
104948
104949
104950
104951
104952
104953
104954
104955
104956
104957
104958
104959
104960
104961
104962
104963
104964
104965
104966
......
104980
104981
104982
104983
104984
104985
104986
104987
104988
104989
104990
104991
104992
104993
104994
104995
104996
......
105005
105006
105007
105008
105009
105010
105011

105012
105013
105014
105015
105016
105017
105018
......
105038
105039
105040
105041
105042
105043
105044
105045
105046
105047
105048
105049
105050
105051
105052
105053
105054
105055
105056
105057
105058
105059
105060
105061
105062
105063
105064
105065
105066
105067
105068
105069
105070
105071
105072
105073
105074

105075
105076

105077
105078
105079
105080
105081
105082
105083
......
105129
105130
105131
105132
105133
105134
105135
105136
105137
105138
105139
105140
105141
105142
105143
105144
105145
105146
105147
105148
105149
105150
105151
105152
105153
105154
105155
105156
105157
105158
105159
105160
105161
105162
105163
105164
105165
105166
105167
105168
105169
105170
105171
105172
105173
105174
105175
105176
105177
105178
105179
105180
105181
105182
105183

105184
105185
105186
105187
105188
105189
105190
105191
......
105196
105197
105198
105199
105200
105201
105202
105203
105204
105205
105206
105207
105208
105209
105210
105211
105212
105213
105214
105215
105216
105217
105218
105219
105220
105221
105222
105223
105224
105225
105226
105227
105228
105229
105230
105231
105232
105233
105234
105235
105236
105237
105238
105239
105240
105241
105242
105243
105244
105245
105246
105247
105248
105249
105250
105251
105252
105253
105254
105255
105256
105257
105258
105259
105260
105261
105262
105263
105264
105265
105266
105267
105268
105269
105270
105271
105272
105273
105274
105275
105276
105277
105278
105279
105280
105281
105282
105283
105284
105285
105286
105287
105288
105289
105290
105291
105292
105293
105294
105295
105296
105297
105298
105299
105300
105301
105302
105303
105304
105305
105306
105307
105308
105309
105310
105311
105312
105313
105314
105315
105316
105317
105318
105319
105320
105321
105322
105323
105324
105325
105326
105327
105328
105329
105330
105331
105332
105333
105334
105335
105336
105337
105338
105339
105340
105341
105342
105343
105344
105345
105346

105347
105348
105349
105350
105351
105352
105353
......
105368
105369
105370
105371
105372
105373
105374
105375
105376
105377
105378
105379
105380
105381
105382
......
105406
105407
105408
105409
105410
105411
105412
105413
105414
105415
105416
105417
105418
105419
105420
105421
105422
105423
......
105449
105450
105451
105452
105453
105454
105455
105456
105457
105458
105459
105460
105461
105462
105463
105464
105465
105466
105467
105468
105469
105470
105471
105472
105473
105474
105475
105476
105477
105478
105479
105480
105481
105482
105483
105484
105485
105486
105487
105488
......
105494
105495
105496
105497
105498
105499
105500
105501
105502
105503









105504
105505
105506
105507
105508
105509
105510
......
105550
105551
105552
105553
105554
105555
105556
105557







105558
105559
105560
105561
105562
105563
105564
......
105570
105571
105572
105573
105574
105575
105576
105577
105578
105579

105580
105581
105582
105583
105584
105585
105586
......
105628
105629
105630
105631
105632
105633
105634
105635
105636
105637
105638
105639
105640
105641
105642
105643
105644
105645
105646
105647
105648
105649
105650
105651
105652
105653
105654
105655
105656
105657
105658
105659
105660
105661
105662
105663
105664
105665
105666
105667
105668
105669
105670
105671
105672
105673
105674
105675
105676
105677
105678
105679
105680
105681
105682
105683
105684
105685
105686
105687
105688
105689
105690
105691
105692
105693
105694
105695
105696
105697
105698
105699
105700
105701
105702
105703
105704
105705
105706
105707
105708
105709
105710
105711
105712
105713
105714
105715
105716
105717
105718
105719
105720
105721
105722
105723
105724
105725
105726
105727
105728
105729
105730
105731
105732
105733
105734
105735
105736
105737
105738
105739
105740
105741
105742
105743
105744
105745
105746
105747
105748
105749
105750
105751
105752
105753
105754
105755
105756
105757
105758
105759
105760
105761
105762
105763
105764
105765
......
105784
105785
105786
105787
105788
105789
105790
105791
105792
105793







105794









105795
105796
105797





105798
105799
105800

























105801

105802
105803
105804






















105805
105806
105807
105808
105809
105810
105811
105812


105813
105814
105815
105816
105817
105818
105819
......
105869
105870
105871
105872
105873
105874
105875
105876
105877
105878
105879
105880
105881
105882
105883
......
106011
106012
106013
106014
106015
106016
106017
106018
106019
106020
106021
106022
106023
106024
106025
106026
106027
106028
......
106037
106038
106039
106040
106041
106042
106043
106044
106045
106046
106047
106048

106049
106050
106051
106052
106053
106054
106055
......
106060
106061
106062
106063
106064
106065
106066
106067
106068
106069
106070
106071
106072
106073
106074
......
106086
106087
106088
106089
106090
106091
106092
106093
106094
106095
106096
106097
106098
106099
106100
106101
106102
106103
106104
106105
106106
106107
106108
106109
106110
106111
106112
106113
106114
106115
106116
106117
106118
106119
106120
106121
106122
106123
......
106171
106172
106173
106174
106175
106176
106177
106178
106179
106180
106181
106182
106183
106184
106185
......
106190
106191
106192
106193
106194
106195
106196
106197
106198
106199
106200
106201
106202
106203
106204
......
106224
106225
106226
106227
106228
106229
106230


106231
106232
106233
106234
106235
106236
106237
106238
106239
106240
106241
106242
106243
106244
106245
106246
106247
106248
106249
106250
106251
......
106286
106287
106288
106289
106290
106291
106292
106293
106294
106295
106296
106297
106298
106299
106300
106301
106302
106303
106304
106305
106306
106307
106308
106309
106310
106311
106312
106313
106314
106315
106316
106317
106318
......
106465
106466
106467
106468
106469
106470
106471
106472


106473
106474
106475
106476
106477
106478
106479
......
106546
106547
106548
106549
106550
106551
106552
106553
106554
106555
106556
106557
106558
106559
106560
......
106581
106582
106583
106584
106585
106586
106587
106588
106589



106590
106591
106592
106593
106594
106595
106596
......
106612
106613
106614
106615
106616
106617
106618
106619
106620
106621
106622


106623
























































106624


106625
106626
106627
106628
106629
106630
106631
106632
106633
106634
106635
106636
106637
106638
......
106680
106681
106682
106683
106684
106685
106686
106687
106688
106689
106690
106691

106692
106693
106694
106695
106696
106697
106698
106699
106700
106701
106702
106703
106704
106705
106706
106707
106708
106709
106710
106711
106712
106713
106714
106715
106716
106717
106718
106719
106720
106721
106722
106723
106724
106725
106726
106727
106728
106729
106730
106731
106732
106733
106734
106735
106736
106737
106738
106739
106740
106741
106742
106743
106744
106745
106746
106747
106748
106749
106750
106751
106752
106753
106754
106755
106756
106757
106758
106759
106760
106761
106762
106763
106764
106765
106766
106767
106768
106769
106770
106771
106772
......
106796
106797
106798
106799
106800
106801
106802





































































































106803
106804
106805
106806
106807
106808
106809
......
106811
106812
106813
106814
106815
106816
106817
106818
106819
106820
106821
106822
106823
106824












































































106825
106826
106827
106828
106829
106830
106831
......
106847
106848
106849
106850
106851
106852
106853
106854
106855
106856
106857
106858
106859
106860
106861
106862
106863
106864
106865
106866
106867
106868
106869
106870
106871
106872
106873
106874
106875
106876
106877
106878
106879
106880
106881
106882
106883
106884
106885
106886
106887
106888
106889
106890
106891
106892
106893
106894
106895
106896
106897
106898
106899
106900
106901
106902
106903
106904
106905
106906
106907
106908
106909
106910
106911
106912
106913
106914
106915
106916
106917
106918
106919
106920
106921
106922
106923
106924
106925
106926
106927
106928
106929
106930
106931
106932
106933
106934
106935
106936
106937
106938
106939
106940
106941
106942
106943
106944
106945
106946
106947
106948
106949
106950
106951
106952
106953
106954
106955
106956
106957
106958
106959
106960
106961
106962
106963
106964
106965
106966
106967
106968
106969
106970
106971
106972
106973
106974
106975
106976
106977
106978
106979
106980
106981
106982
106983
106984
106985
106986
......
106991
106992
106993
106994
106995
106996
106997
106998
106999
107000
107001
107002
107003
107004
107005
107006
107007
107008
107009
107010
107011
107012


107013
107014
107015
107016
107017
107018
107019
......
107041
107042
107043
107044
107045
107046
107047

107048
107049
107050
107051
107052
107053
107054
......
107096
107097
107098
107099
107100
107101
107102
107103
107104
107105
107106
107107
107108
107109
107110
107111
......
107112
107113
107114
107115
107116
107117
107118

107119
107120
107121
107122
107123
107124
107125
......
107137
107138
107139
107140
107141
107142
107143
107144
107145








































































































































































































107146
107147
107148
107149
107150
107151
107152
......
107225
107226
107227
107228
107229
107230
107231
107232
107233
107234
107235

107236
107237
107238
107239
107240
107241
107242
......
107329
107330
107331
107332
107333
107334
107335
107336
107337
107338
107339
107340
107341
107342
107343
......
107381
107382
107383
107384
107385
107386
107387
107388
107389
107390
107391
107392
107393
107394
107395
107396
107397
107398
107399
107400
107401
......
107419
107420
107421
107422
107423
107424
107425
107426
107427
107428
107429
107430
107431
107432
107433
107434
107435
107436
107437
107438
107439
107440
107441
107442
107443
107444
107445
107446
107447
107448
107449
107450
107451
107452
107453
107454
107455
107456
107457
......
107469
107470
107471
107472
107473
107474
107475
107476
107477
107478
107479
107480
107481
107482
107483
......
107488
107489
107490
107491
107492
107493
107494
107495
107496
107497
107498
107499
107500
107501
107502
......
107518
107519
107520
107521
107522
107523
107524
107525
107526
107527
107528
107529
107530
107531
107532
107533
107534
107535
107536
107537
107538
107539
107540
107541
107542
107543
107544
107545









































































































































































































































































































































































































































































































































































































































































































































































































































































































107546
107547
107548
107549
107550
107551
107552
......
107555
107556
107557
107558
107559
107560
107561



107562
107563
107564
107565
107566
107567
107568
......
107634
107635
107636
107637
107638
107639
107640
107641
107642
107643
107644
107645
107646
107647
107648
......
107652
107653
107654
107655
107656
107657
107658
107659
107660
107661
107662
107663
107664
107665


107666
107667
107668
107669
107670
107671
107672
107673
107674
107675
107676
107677
107678
107679
107680
107681
107682
107683
107684
107685
107686
......
107742
107743
107744
107745
107746
107747
107748
107749

107750
107751
107752
107753
107754
107755

107756
107757
107758
107759
107760
107761
107762
107763

107764
107765
107766
107767
107768
107769
107770
107771
107772
107773
107774
107775
107776
107777
107778
107779
107780
107781
107782
107783
107784
107785
107786
107787

107788
107789
107790
107791
107792
107793
107794
107795
107796
107797
107798
107799
......
107853
107854
107855
107856
107857
107858
107859
107860

107861
107862
107863
107864
107865
107866
107867
107868
107869
107870
107871
107872
107873
107874
107875
107876
107877
107878
107879
107880
107881
107882
107883
107884
107885
107886
107887
107888
107889
107890
107891
......
107900
107901
107902
107903
107904
107905
107906

107907
107908
107909
107910

107911
107912
107913
107914
107915
107916
107917
107918
107919

107920
107921
107922
107923
107924
107925
107926
107927
107928
107929
107930
107931
107932
107933
107934
107935
107936
107937
107938
107939
107940
107941
107942
107943
107944
107945
107946
107947
107948
107949
107950
107951
107952
107953
107954
107955
107956
107957
107958
107959

107960

107961
107962
107963






107964
107965
107966
107967
107968
107969
107970
107971
......
107973
107974
107975
107976
107977
107978
107979

107980
107981
107982
107983
107984
107985
107986
107987
107988
107989
107990
107991
107992
107993
107994
107995
107996
107997
107998
107999
108000
108001
108002
108003
108004
108005
108006
108007
108008

108009
108010
108011
108012
108013
108014
108015
108016
108017
108018
......
108041
108042
108043
108044
108045
108046
108047
108048
108049
108050
108051
108052
108053

108054




108055
108056
108057
108058
108059


108060

108061
108062
108063
108064
108065
108066
108067
108068

108069



108070
108071
108072
108073
108074

108075
108076


108077
108078
108079
108080
108081
108082
108083
108084
108085
108086
108087
108088
108089
108090
108091
108092
108093
108094
108095
108096
108097
108098

108099
108100
108101
108102
108103
108104
108105
108106
108107
108108
108109
108110
108111
108112
108113
108114
108115
108116
108117
108118
108119
108120
108121
108122
108123
108124
108125
108126
108127
108128
108129
108130
108131
108132
108133
108134
......
108143
108144
108145
108146
108147
108148
108149
108150
108151
108152
108153
108154
108155
108156
108157
108158
108159
108160
108161
108162
108163
108164
108165
108166
108167
108168
108169
108170
108171
108172
108173
108174
108175
108176
108177
108178
108179
108180
108181
108182
108183



108184

108185
108186
108187
108188
108189
108190
108191
108192
108193
108194
108195
108196
108197
108198
108199
108200
......
108232
108233
108234
108235
108236
108237
108238
108239
108240
108241
108242
108243
108244
108245
108246
108247
......
108249
108250
108251
108252
108253
108254
108255
108256
108257

108258
108259
108260
108261
108262
108263
108264
108265
108266
108267
108268
108269
108270
108271
108272
108273
108274
108275
108276
108277
108278
108279
108280
108281
108282
108283
108284
108285
108286
108287
108288
108289
108290
108291
108292
108293
108294


108295
108296
108297
108298
108299
108300
108301
108302
108303
108304
108305
108306
108307
108308
108309
108310
108311
108312
108313
108314
108315
108316
108317
108318
......
108329
108330
108331
108332
108333
108334
108335
108336
108337
108338
108339
108340
108341
108342
108343
......
108371
108372
108373
108374
108375
108376
108377
108378
108379
108380
108381
108382
108383
108384
108385
108386
108387
108388
......
108394
108395
108396
108397
108398
108399
108400
108401
108402
108403
108404
108405
108406
108407
108408
108409
108410
......
108415
108416
108417
108418
108419
108420
108421
108422
108423
108424
108425
108426
108427
108428
108429
108430
108431
108432
108433
108434
108435
108436
108437
108438
108439
108440
108441
108442
108443
108444
108445
108446
......
108485
108486
108487
108488
108489
108490
108491
108492
108493
108494
108495
108496
108497
108498
108499
......
108501
108502
108503
108504
108505
108506
108507
108508
108509
108510
108511
108512
108513
108514
108515
108516
108517
108518
......
108526
108527
108528
108529
108530
108531
108532
108533
108534
108535
108536
108537
108538
108539
108540
......
108551
108552
108553
108554
108555
108556
108557
108558
108559
108560
108561
108562
108563
108564
108565
108566
108567
108568
108569
108570
......
108576
108577
108578
108579
108580
108581
108582
108583
108584
108585
108586
108587
108588
108589
108590
108591
108592
108593
108594
108595
108596
......
108611
108612
108613
108614
108615
108616
108617
108618
108619
108620
108621
108622
108623
108624
108625
108626
108627
108628
108629
108630
108631
108632
108633
108634
108635
108636
108637
108638
108639
108640
108641
108642
108643
108644
108645
108646
108647
108648
108649
108650
108651
108652
108653
108654
108655

108656
108657
108658
108659
108660
108661
108662
108663
108664




108665
108666
108667
108668
108669
108670
108671
108672
108673
108674
108675
......
108688
108689
108690
108691
108692
108693
108694
108695
108696

108697
108698
108699
108700
108701
108702
108703
108704
108705
108706
108707
108708
108709
108710
108711
108712
108713
108714
108715
108716
108717
108718
108719
108720
108721
108722
108723
108724
108725
108726
108727
108728
108729
108730
108731
108732
108733
108734
108735
......
108738
108739
108740
108741
108742
108743
108744
108745
108746
108747
108748
108749
108750
108751
108752
108753
108754
108755
108756
108757
108758
108759
108760
108761
108762
108763
108764
108765
108766
108767
108768
108769
108770
108771
108772
108773
108774
108775
108776
108777
108778
108779
108780
108781
108782
108783
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109248
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109260
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109299
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109310
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109380
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109399
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109410
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109438
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109853
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109894
109895
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110021
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110035
110036
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110040
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110045
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110050
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110217
110218
110219

110220
110221
110222
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110332
110333
110334
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110337
110338
110339
110340
......
110403
110404
110405
110406
110407
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110409
110410
110411
110412
110413









110414
110415
110416
110417
110418
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110426
110427
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110429
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110433
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110438

110439
110440
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110454
......
110465
110466
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110471

110472
110473




110474
110475
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110485
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110487
110488

110489
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......
110551
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110569


















110570
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110572
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110577











110578



110579
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110589









110590
110591
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110595




110596
110597
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110607








110608
110609

110610
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110616





110617
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110619


110620
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110622












110623
110624
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110635
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110642




110643
110644
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110648






110649
110650
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110664
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110666
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110674






110675
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110679
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110681


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110684
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110699

110700
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110707
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110731
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110776
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......
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......
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......
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110874
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110904
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......
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......
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......
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......
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......
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......
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......
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......
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......
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......
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......
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......
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......
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......
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......
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......
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......
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......
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......
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......
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......
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......
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......
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......
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......
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......
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117776


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......
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......
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......
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......
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......
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......
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......
121193
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121222
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......
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......
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......
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......
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......
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......
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......
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121585
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121588
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......
123137
123138
123139
123140
123141
123142
123143



123144

123145
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123151
......
125488
125489
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125495
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125499
125500
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125505
......
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127000
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127002
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127020
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......
128509
128510
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......
129976
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129985
129986
129987
129988



129989
129990
129991
129992




129993
129994
129995
129996


129997
129998

129999
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130001
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130005
130006


130007
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130013
......
130387
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130399
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130409
......
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......
130948
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130960
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......
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......
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......
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......
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......
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......
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......
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......
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......
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/******************************************************************************
** This file is an amalgamation of many separate C source files from SQLite
** version 3.8.0.  By combining all the individual C code files into this 
** single large file, the entire code can be compiled as a single translation
** unit.  This allows many compilers to do optimizations that would not be
** possible if the files were compiled separately.  Performance improvements
** of 5% or more are commonly seen when SQLite is compiled as a single
** translation unit.
**
** This file is all you need to compile SQLite.  To use SQLite in other
................................................................................
# define SQLITE_PTR_TO_INT(X)  ((int)(X))
#endif

/*
** The SQLITE_THREADSAFE macro must be defined as 0, 1, or 2.
** 0 means mutexes are permanently disable and the library is never
** threadsafe.  1 means the library is serialized which is the highest
** level of threadsafety.  2 means the library is multithreaded - multiple
** threads can use SQLite as long as no two threads try to use the same
** database connection at the same time.
**
** Older versions of SQLite used an optional THREADSAFE macro.
** We support that for legacy.
*/
#if !defined(SQLITE_THREADSAFE)
................................................................................
**     SQLITE_MEMDEBUG               // Debugging version of system malloc()
**
** On Windows, if the SQLITE_WIN32_MALLOC_VALIDATE macro is defined and the
** assert() macro is enabled, each call into the Win32 native heap subsystem
** will cause HeapValidate to be called.  If heap validation should fail, an
** assertion will be triggered.
**



** If none of the above are defined, then set SQLITE_SYSTEM_MALLOC as
** the default.
*/
#if defined(SQLITE_SYSTEM_MALLOC) \
  + defined(SQLITE_WIN32_MALLOC) \
  + defined(SQLITE_ZERO_MALLOC) \
  + defined(SQLITE_MEMDEBUG)>1
................................................................................
*/
#if !defined(SQLITE_MALLOC_SOFT_LIMIT)
# define SQLITE_MALLOC_SOFT_LIMIT 1024
#endif

/*
** We need to define _XOPEN_SOURCE as follows in order to enable
** recursive mutexes on most Unix systems and fchmod() on OpenBSD.
** But _XOPEN_SOURCE define causes problems for Mac OS X, so omit

** it.






*/
#if !defined(_XOPEN_SOURCE) && !defined(__DARWIN__) && !defined(__APPLE__)

#  define _XOPEN_SOURCE 600







#endif

/*
** NDEBUG and SQLITE_DEBUG are opposites.  It should always be true that
** defined(NDEBUG)==!defined(SQLITE_DEBUG).  If this is not currently true,
** make it true by defining or undefining NDEBUG.
**
** Setting NDEBUG makes the code smaller and faster by disabling the
** assert() statements in the code.  So we want the default action
** to be for NDEBUG to be set and NDEBUG to be undefined only if SQLITE_DEBUG
** is set.  Thus NDEBUG becomes an opt-in rather than an opt-out
** feature.
*/
#if !defined(NDEBUG) && !defined(SQLITE_DEBUG) 
# define NDEBUG 1
#endif
................................................................................
** of SQLite to unexpected behavior - to make the code "self-healing"
** or "ductile" rather than being "brittle" and crashing at the first
** hint of unplanned behavior.
**
** In other words, ALWAYS and NEVER are added for defensive code.
**
** When doing coverage testing ALWAYS and NEVER are hard-coded to
** be true and false so that the unreachable code they specify will
** not be counted as untested code.
*/
#if defined(SQLITE_COVERAGE_TEST)
# define ALWAYS(X)      (1)
# define NEVER(X)       (0)
#elif !defined(NDEBUG)
# define ALWAYS(X)      ((X)?1:(assert(0),0))
................................................................................
** macros to verify that we have tested SQLite for large-file support.
*/
#define IS_BIG_INT(X)  (((X)&~(i64)0xffffffff)!=0)

/*
** The macro unlikely() is a hint that surrounds a boolean
** expression that is usually false.  Macro likely() surrounds
** a boolean expression that is usually true.  These hints could,
** in theory, be used by the compiler to generate better code, but
** currently they are just comments for human readers.
*/




#define likely(X)    (X)
#define unlikely(X)  (X)


/************** Include sqlite3.h in the middle of sqliteInt.h ***************/
/************** Begin file sqlite3.h *****************************************/
/*
** 2001 September 15
**
** The author disclaims copyright to this source code.  In place of
................................................................................
** string contains the date and time of the check-in (UTC) and an SHA1
** hash of the entire source tree.
**
** See also: [sqlite3_libversion()],
** [sqlite3_libversion_number()], [sqlite3_sourceid()],
** [sqlite_version()] and [sqlite_source_id()].
*/
#define SQLITE_VERSION        "3.8.0"
#define SQLITE_VERSION_NUMBER 3008000
#define SQLITE_SOURCE_ID      "2013-08-22 02:56:28 0775501acf152dcbf4dd039f4511f3d8c4330d85"

/*
** CAPI3REF: Run-Time Library Version Numbers
** KEYWORDS: sqlite3_version, sqlite3_sourceid
**
** These interfaces provide the same information as the [SQLITE_VERSION],
** [SQLITE_VERSION_NUMBER], and [SQLITE_SOURCE_ID] C preprocessor macros
................................................................................
#define SQLITE_IOERR_SHMOPEN           (SQLITE_IOERR | (18<<8))
#define SQLITE_IOERR_SHMSIZE           (SQLITE_IOERR | (19<<8))
#define SQLITE_IOERR_SHMLOCK           (SQLITE_IOERR | (20<<8))
#define SQLITE_IOERR_SHMMAP            (SQLITE_IOERR | (21<<8))
#define SQLITE_IOERR_SEEK              (SQLITE_IOERR | (22<<8))
#define SQLITE_IOERR_DELETE_NOENT      (SQLITE_IOERR | (23<<8))
#define SQLITE_IOERR_MMAP              (SQLITE_IOERR | (24<<8))
#define SQLITE_IOERR_GETTEMPPATH       (SQLITE_IOERR | (25<<8))
#define SQLITE_LOCKED_SHAREDCACHE      (SQLITE_LOCKED |  (1<<8))
#define SQLITE_BUSY_RECOVERY           (SQLITE_BUSY   |  (1<<8))
#define SQLITE_BUSY_SNAPSHOT           (SQLITE_BUSY   |  (2<<8))
#define SQLITE_CANTOPEN_NOTEMPDIR      (SQLITE_CANTOPEN | (1<<8))
#define SQLITE_CANTOPEN_ISDIR          (SQLITE_CANTOPEN | (2<<8))
#define SQLITE_CANTOPEN_FULLPATH       (SQLITE_CANTOPEN | (3<<8))
#define SQLITE_CORRUPT_VTAB            (SQLITE_CORRUPT | (1<<8))
#define SQLITE_READONLY_RECOVERY       (SQLITE_READONLY | (1<<8))
#define SQLITE_READONLY_CANTLOCK       (SQLITE_READONLY | (2<<8))
#define SQLITE_READONLY_ROLLBACK       (SQLITE_READONLY | (3<<8))
................................................................................
#define SQLITE_CONSTRAINT_NOTNULL      (SQLITE_CONSTRAINT | (5<<8))
#define SQLITE_CONSTRAINT_PRIMARYKEY   (SQLITE_CONSTRAINT | (6<<8))
#define SQLITE_CONSTRAINT_TRIGGER      (SQLITE_CONSTRAINT | (7<<8))
#define SQLITE_CONSTRAINT_UNIQUE       (SQLITE_CONSTRAINT | (8<<8))
#define SQLITE_CONSTRAINT_VTAB         (SQLITE_CONSTRAINT | (9<<8))
#define SQLITE_NOTICE_RECOVER_WAL      (SQLITE_NOTICE | (1<<8))
#define SQLITE_NOTICE_RECOVER_ROLLBACK (SQLITE_NOTICE | (2<<8))
#define SQLITE_WARNING_AUTOINDEX       (SQLITE_WARNING | (1<<8))

/*
** CAPI3REF: Flags For File Open Operations
**
** These bit values are intended for use in the
** 3rd parameter to the [sqlite3_open_v2()] interface and
** in the 4th parameter to the [sqlite3_vfs.xOpen] method.
................................................................................
** ^The sqlite3_progress_handler(D,N,X,P) interface causes the callback
** function X to be invoked periodically during long running calls to
** [sqlite3_exec()], [sqlite3_step()] and [sqlite3_get_table()] for
** database connection D.  An example use for this
** interface is to keep a GUI updated during a large query.
**
** ^The parameter P is passed through as the only parameter to the 
** callback function X.  ^The parameter N is the approximate number of 
** [virtual machine instructions] that are evaluated between successive
** invocations of the callback X.  ^If N is less than one then the progress
** handler is disabled.
**
** ^Only a single progress handler may be defined at one time per
** [database connection]; setting a new progress handler cancels the
** old one.  ^Setting parameter X to NULL disables the progress handler.
** ^The progress handler is also disabled by setting N to a value less
** than 1.
**
................................................................................
** registered the application defined function.
*/
SQLITE_API sqlite3 *sqlite3_context_db_handle(sqlite3_context*);

/*
** CAPI3REF: Function Auxiliary Data
**
** These functions may be used by (non-aggregate) SQL functions to
** associate metadata with argument values. If the same value is passed to
** multiple invocations of the same SQL function during query execution, under
** some circumstances the associated metadata may be preserved.  An example
** of where this might be useful is in a regular-expression matching
** function. The compiled version of the regular expression can be stored as
** metadata associated with the pattern string.  
** Then as long as the pattern string remains the same,
** the compiled regular expression can be reused on multiple
** invocations of the same function.

**
** ^The sqlite3_get_auxdata() interface returns a pointer to the metadata
** associated by the sqlite3_set_auxdata() function with the Nth argument
** value to the application-defined function. ^If there is no metadata
** associated with the function argument, this sqlite3_get_auxdata() interface

** returns a NULL pointer.
**
** ^The sqlite3_set_auxdata(C,N,P,X) interface saves P as metadata for the N-th

** argument of the application-defined function.  ^Subsequent
** calls to sqlite3_get_auxdata(C,N) return P from the most recent
** sqlite3_set_auxdata(C,N,P,X) call if the metadata is still valid or
** NULL if the metadata has been discarded.
** ^After each call to sqlite3_set_auxdata(C,N,P,X) where X is not NULL,
** SQLite will invoke the destructor function X with parameter P exactly
** once, when the metadata is discarded.
** SQLite is free to discard the metadata at any time, including: <ul>
** <li> when the corresponding function parameter changes, or

** <li> when [sqlite3_reset()] or [sqlite3_finalize()] is called for the
**      SQL statement, or
** <li> when sqlite3_set_auxdata() is invoked again on the same parameter, or
** <li> during the original sqlite3_set_auxdata() call when a memory 
**      allocation error occurs. </ul>)^
**



** Note the last bullet in particular.  The destructor X in 
** sqlite3_set_auxdata(C,N,P,X) might be called immediately, before the
** sqlite3_set_auxdata() interface even returns.  Hence sqlite3_set_auxdata()
** should be called near the end of the function implementation and the
** function implementation should not make any use of P after
** sqlite3_set_auxdata() has been called.
**
** ^(In practice, metadata is preserved between function calls for

** function parameters that are compile-time constants, including literal
** values and [parameters] and expressions composed from the same.)^
**
** These routines must be called from the same thread in which
** the SQL function is running.
*/
SQLITE_API void *sqlite3_get_auxdata(sqlite3_context*, int N);
SQLITE_API void sqlite3_set_auxdata(sqlite3_context*, int N, void*, void (*)(void*));

................................................................................
** The code to implement this API is not available in the public release
** of SQLite.
*/
SQLITE_API int sqlite3_key(
  sqlite3 *db,                   /* Database to be rekeyed */
  const void *pKey, int nKey     /* The key */
);
SQLITE_API int sqlite3_key_v2(
  sqlite3 *db,                   /* Database to be rekeyed */
  const char *zDbName,           /* Name of the database */
  const void *pKey, int nKey     /* The key */
);

/*
** Change the key on an open database.  If the current database is not
** encrypted, this routine will encrypt it.  If pNew==0 or nNew==0, the
** database is decrypted.
**
** The code to implement this API is not available in the public release
** of SQLite.
*/
SQLITE_API int sqlite3_rekey(
  sqlite3 *db,                   /* Database to be rekeyed */
  const void *pKey, int nKey     /* The new key */
);
SQLITE_API int sqlite3_rekey_v2(
  sqlite3 *db,                   /* Database to be rekeyed */
  const char *zDbName,           /* Name of the database */
  const void *pKey, int nKey     /* The new key */
);

/*
** Specify the activation key for a SEE database.  Unless 
** activated, none of the SEE routines will work.
*/
SQLITE_API void sqlite3_activate_see(
  const char *zPassPhrase        /* Activation phrase */
................................................................................
** xEntryPoint() returns an error, the [sqlite3_open()], [sqlite3_open16()],
** or [sqlite3_open_v2()] call that provoked the xEntryPoint() will fail.
**
** ^Calling sqlite3_auto_extension(X) with an entry point X that is already
** on the list of automatic extensions is a harmless no-op. ^No entry point
** will be called more than once for each database connection that is opened.
**
** See also: [sqlite3_reset_auto_extension()]
** and [sqlite3_cancel_auto_extension()]
*/
SQLITE_API int sqlite3_auto_extension(void (*xEntryPoint)(void));

/*
** CAPI3REF: Cancel Automatic Extension Loading
**
** ^The [sqlite3_cancel_auto_extension(X)] interface unregisters the
** initialization routine X that was registered using a prior call to
** [sqlite3_auto_extension(X)].  ^The [sqlite3_cancel_auto_extension(X)]
** routine returns 1 if initialization routine X was successfully 
** unregistered and it returns 0 if X was not on the list of initialization
** routines.
*/
SQLITE_API int sqlite3_cancel_auto_extension(void (*xEntryPoint)(void));

/*
** CAPI3REF: Reset Automatic Extension Loading
**
** ^This interface disables all automatic extensions previously
** registered using [sqlite3_auto_extension()].
*/
SQLITE_API void sqlite3_reset_auto_extension(void);
................................................................................
** wal file in wal mode databases, or the number of pages written to the
** database file in rollback mode databases. Any pages written as part of
** transaction rollback or database recovery operations are not included.
** If an IO or other error occurs while writing a page to disk, the effect
** on subsequent SQLITE_DBSTATUS_CACHE_WRITE requests is undefined.)^ ^The
** highwater mark associated with SQLITE_DBSTATUS_CACHE_WRITE is always 0.
** </dd>
**
** [[SQLITE_DBSTATUS_DEFERRED_FKS]] ^(<dt>SQLITE_DBSTATUS_DEFERRED_FKS</dt>
** <dd>This parameter returns zero for the current value if and only if
** all foreign key constraints (deferred or immediate) have been
** resolved.)^  ^The highwater mark is always 0.
** </dd>
** </dl>
*/
#define SQLITE_DBSTATUS_LOOKASIDE_USED       0
#define SQLITE_DBSTATUS_CACHE_USED           1
#define SQLITE_DBSTATUS_SCHEMA_USED          2
#define SQLITE_DBSTATUS_STMT_USED            3
#define SQLITE_DBSTATUS_LOOKASIDE_HIT        4
#define SQLITE_DBSTATUS_LOOKASIDE_MISS_SIZE  5
#define SQLITE_DBSTATUS_LOOKASIDE_MISS_FULL  6
#define SQLITE_DBSTATUS_CACHE_HIT            7
#define SQLITE_DBSTATUS_CACHE_MISS           8
#define SQLITE_DBSTATUS_CACHE_WRITE          9
#define SQLITE_DBSTATUS_DEFERRED_FKS        10
#define SQLITE_DBSTATUS_MAX                 10   /* Largest defined DBSTATUS */


/*
** CAPI3REF: Prepared Statement Status
**
** ^(Each prepared statement maintains various
** [SQLITE_STMTSTATUS counters] that measure the number
................................................................................
**
** [[SQLITE_STMTSTATUS_AUTOINDEX]] <dt>SQLITE_STMTSTATUS_AUTOINDEX</dt>
** <dd>^This is the number of rows inserted into transient indices that
** were created automatically in order to help joins run faster.
** A non-zero value in this counter may indicate an opportunity to
** improvement performance by adding permanent indices that do not
** need to be reinitialized each time the statement is run.</dd>
**
** [[SQLITE_STMTSTATUS_VM_STEP]] <dt>SQLITE_STMTSTATUS_VM_STEP</dt>
** <dd>^This is the number of virtual machine operations executed
** by the prepared statement if that number is less than or equal
** to 2147483647.  The number of virtual machine operations can be 
** used as a proxy for the total work done by the prepared statement.
** If the number of virtual machine operations exceeds 2147483647
** then the value returned by this statement status code is undefined.
** </dd>
** </dl>
*/
#define SQLITE_STMTSTATUS_FULLSCAN_STEP     1
#define SQLITE_STMTSTATUS_SORT              2
#define SQLITE_STMTSTATUS_AUTOINDEX         3
#define SQLITE_STMTSTATUS_VM_STEP           4

/*
** CAPI3REF: Custom Page Cache Object
**
** The sqlite3_pcache type is opaque.  It is implemented by
** the pluggable module.  The SQLite core has no knowledge of
** its size or internal structure and never deals with the
................................................................................
#ifdef SQLITE_OMIT_FLOATING_POINT
# undef double
#endif

#if 0
}  /* End of the 'extern "C"' block */
#endif
#endif /* _SQLITE3_H_ */

/*
** 2010 August 30
**
** The author disclaims copyright to this source code.  In place of
** a legal notice, here is a blessing:
**
................................................................................
** GCC does not define the offsetof() macro so we'll have to do it
** ourselves.
*/
#ifndef offsetof
#define offsetof(STRUCTURE,FIELD) ((int)((char*)&((STRUCTURE*)0)->FIELD))
#endif

/*
** Macros to compute minimum and maximum of two numbers.
*/
#define MIN(A,B) ((A)<(B)?(A):(B))
#define MAX(A,B) ((A)>(B)?(A):(B))

/*
** Check to see if this machine uses EBCDIC.  (Yes, believe it or
** not, there are still machines out there that use EBCDIC.)
*/
#if 'A' == '\301'
# define SQLITE_EBCDIC 1
#else
................................................................................
typedef struct Trigger Trigger;
typedef struct TriggerPrg TriggerPrg;
typedef struct TriggerStep TriggerStep;
typedef struct UnpackedRecord UnpackedRecord;
typedef struct VTable VTable;
typedef struct VtabCtx VtabCtx;
typedef struct Walker Walker;

typedef struct WhereInfo WhereInfo;


/*
** Defer sourcing vdbe.h and btree.h until after the "u8" and 
** "BusyHandler" typedefs. vdbe.h also requires a few of the opaque
** pointer types (i.e. FuncDef) defined above.
*/
/************** Include btree.h in the middle of sqliteInt.h *****************/
................................................................................
#define BTREE_MEMORY        2  /* This is an in-memory DB */
#define BTREE_SINGLE        4  /* The file contains at most 1 b-tree */
#define BTREE_UNORDERED     8  /* Use of a hash implementation is OK */

SQLITE_PRIVATE int sqlite3BtreeClose(Btree*);
SQLITE_PRIVATE int sqlite3BtreeSetCacheSize(Btree*,int);
SQLITE_PRIVATE int sqlite3BtreeSetMmapLimit(Btree*,sqlite3_int64);
SQLITE_PRIVATE int sqlite3BtreeSetPagerFlags(Btree*,unsigned);
SQLITE_PRIVATE int sqlite3BtreeSyncDisabled(Btree*);
SQLITE_PRIVATE int sqlite3BtreeSetPageSize(Btree *p, int nPagesize, int nReserve, int eFix);
SQLITE_PRIVATE int sqlite3BtreeGetPageSize(Btree*);
SQLITE_PRIVATE int sqlite3BtreeMaxPageCount(Btree*,int);
SQLITE_PRIVATE u32 sqlite3BtreeLastPage(Btree*);
SQLITE_PRIVATE int sqlite3BtreeSecureDelete(Btree*,int);
SQLITE_PRIVATE int sqlite3BtreeGetReserve(Btree*);
................................................................................
*/
typedef struct Vdbe Vdbe;

/*
** The names of the following types declared in vdbeInt.h are required
** for the VdbeOp definition.
*/

typedef struct Mem Mem;
typedef struct SubProgram SubProgram;

/*
** A single instruction of the virtual machine has an opcode
** and as many as three operands.  The instruction is recorded
** as an instance of the following structure:
................................................................................
  union {             /* fourth parameter */
    int i;                 /* Integer value if p4type==P4_INT32 */
    void *p;               /* Generic pointer */
    char *z;               /* Pointer to data for string (char array) types */
    i64 *pI64;             /* Used when p4type is P4_INT64 */
    double *pReal;         /* Used when p4type is P4_REAL */
    FuncDef *pFunc;        /* Used when p4type is P4_FUNCDEF */

    CollSeq *pColl;        /* Used when p4type is P4_COLLSEQ */
    Mem *pMem;             /* Used when p4type is P4_MEM */
    VTable *pVtab;         /* Used when p4type is P4_VTAB */
    KeyInfo *pKeyInfo;     /* Used when p4type is P4_KEYINFO */
    int *ai;               /* Used when p4type is P4_INTARRAY */
    SubProgram *pProgram;  /* Used when p4type is P4_SUBPROGRAM */
    int (*xAdvance)(BtCursor *, int *);
................................................................................
*/
#define P4_NOTUSED    0   /* The P4 parameter is not used */
#define P4_DYNAMIC  (-1)  /* Pointer to a string obtained from sqliteMalloc() */
#define P4_STATIC   (-2)  /* Pointer to a static string */
#define P4_COLLSEQ  (-4)  /* P4 is a pointer to a CollSeq structure */
#define P4_FUNCDEF  (-5)  /* P4 is a pointer to a FuncDef structure */
#define P4_KEYINFO  (-6)  /* P4 is a pointer to a KeyInfo structure */

#define P4_MEM      (-8)  /* P4 is a pointer to a Mem*    structure */
#define P4_TRANSIENT  0   /* P4 is a pointer to a transient string */
#define P4_VTAB     (-10) /* P4 is a pointer to an sqlite3_vtab structure */
#define P4_MPRINTF  (-11) /* P4 is a string obtained from sqlite3_mprintf() */
#define P4_REAL     (-12) /* P4 is a 64-bit floating point value */
#define P4_INT64    (-13) /* P4 is a 64-bit signed integer */
#define P4_INT32    (-14) /* P4 is a 32-bit signed integer */
................................................................................
** The makefile scans the vdbe.c source file and creates the "opcodes.h"
** header file that defines a number for each opcode used by the VDBE.
*/
/************** Include opcodes.h in the middle of vdbe.h ********************/
/************** Begin file opcodes.h *****************************************/
/* Automatically generated.  Do not edit */
/* See the mkopcodeh.awk script for details */
#define OP_Function                             1
#define OP_Savepoint                            2
#define OP_AutoCommit                           3
#define OP_Transaction                          4
#define OP_SorterNext                           5
#define OP_Prev                                 6
#define OP_Next                                 7
#define OP_AggStep                              8
#define OP_Checkpoint                           9
#define OP_JournalMode                         10
#define OP_Vacuum                              11
#define OP_VFilter                             12
#define OP_VUpdate                             13
#define OP_Goto                                14
#define OP_Gosub                               15
#define OP_Return                              16
#define OP_Yield                               17
#define OP_HaltIfNull                          18
#define OP_Not                                 19   /* same as TK_NOT      */
#define OP_Halt                                20
#define OP_Integer                             21
#define OP_Int64                               22


#define OP_String                              23
#define OP_Null                                24
#define OP_Blob                                25
#define OP_Variable                            26
#define OP_Move                                27
#define OP_Copy                                28
#define OP_SCopy                               29
#define OP_ResultRow                           30






#define OP_CollSeq                             31





#define OP_AddImm                              32
#define OP_MustBeInt                           33
#define OP_RealAffinity                        34











#define OP_Permutation                         35
#define OP_Compare                             36
#define OP_Jump                                37




#define OP_Once                                38
#define OP_If                                  39
#define OP_IfNot                               40


#define OP_Column                              41
#define OP_Affinity                            42
#define OP_MakeRecord                          43
#define OP_Count                               44



#define OP_ReadCookie                          45
#define OP_SetCookie                           46
#define OP_VerifyCookie                        47
#define OP_OpenRead                            48
#define OP_OpenWrite                           49
#define OP_OpenAutoindex                       50
#define OP_OpenEphemeral                       51
#define OP_SorterOpen                          52
#define OP_OpenPseudo                          53
#define OP_Close                               54
#define OP_SeekLt                              55
#define OP_SeekLe                              56
#define OP_SeekGe                              57
#define OP_SeekGt                              58
#define OP_Seek                                59
#define OP_NotFound                            60
#define OP_Found                               61
#define OP_IsUnique                            62
#define OP_NotExists                           63
#define OP_Sequence                            64
#define OP_NewRowid                            65
#define OP_Insert                              66
#define OP_InsertInt                           67
#define OP_Or                                  68   /* same as TK_OR       */
#define OP_And                                 69   /* same as TK_AND      */
#define OP_Delete                              70
#define OP_ResetCount                          71
#define OP_SorterCompare                       72
#define OP_IsNull                              73   /* same as TK_ISNULL   */
#define OP_NotNull                             74   /* same as TK_NOTNULL  */
#define OP_Ne                                  75   /* same as TK_NE       */
#define OP_Eq                                  76   /* same as TK_EQ       */
#define OP_Gt                                  77   /* same as TK_GT       */
#define OP_Le                                  78   /* same as TK_LE       */
#define OP_Lt                                  79   /* same as TK_LT       */
#define OP_Ge                                  80   /* same as TK_GE       */
#define OP_SorterData                          81
#define OP_BitAnd                              82   /* same as TK_BITAND   */
#define OP_BitOr                               83   /* same as TK_BITOR    */
#define OP_ShiftLeft                           84   /* same as TK_LSHIFT   */
#define OP_ShiftRight                          85   /* same as TK_RSHIFT   */
#define OP_Add                                 86   /* same as TK_PLUS     */
#define OP_Subtract                            87   /* same as TK_MINUS    */
#define OP_Multiply                            88   /* same as TK_STAR     */
#define OP_Divide                              89   /* same as TK_SLASH    */
#define OP_Remainder                           90   /* same as TK_REM      */
#define OP_Concat                              91   /* same as TK_CONCAT   */
#define OP_RowKey                              92
#define OP_BitNot                              93   /* same as TK_BITNOT   */
#define OP_String8                             94   /* same as TK_STRING   */
#define OP_RowData                             95
#define OP_Rowid                               96
#define OP_NullRow                             97
#define OP_Last                                98
#define OP_SorterSort                          99
#define OP_Sort                               100
#define OP_Rewind                             101



#define OP_SorterInsert                       102
#define OP_IdxInsert                          103
#define OP_IdxDelete                          104
#define OP_IdxRowid                           105
#define OP_IdxLT                              106
#define OP_IdxGE                              107
#define OP_Destroy                            108
#define OP_Clear                              109
#define OP_CreateIndex                        110
#define OP_CreateTable                        111
#define OP_ParseSchema                        112
#define OP_LoadAnalysis                       113
#define OP_DropTable                          114
#define OP_DropIndex                          115
#define OP_DropTrigger                        116
#define OP_IntegrityCk                        117
#define OP_RowSetAdd                          118
#define OP_RowSetRead                         119
#define OP_RowSetTest                         120
#define OP_Program                            121
#define OP_Param                              122
#define OP_FkCounter                          123
#define OP_FkIfZero                           124
#define OP_MemMax                             125
#define OP_IfPos                              126
#define OP_IfNeg                              127
#define OP_IfZero                             128

#define OP_AggFinal                           129



#define OP_Real                               130   /* same as TK_FLOAT    */
#define OP_IncrVacuum                         131
#define OP_Expire                             132
#define OP_TableLock                          133
#define OP_VBegin                             134
#define OP_VCreate                            135
#define OP_VDestroy                           136
#define OP_VOpen                              137

#define OP_VColumn                            138
#define OP_VNext                              139
#define OP_VRename                            140
#define OP_ToText                             141   /* same as TK_TO_TEXT  */
#define OP_ToBlob                             142   /* same as TK_TO_BLOB  */
#define OP_ToNumeric                          143   /* same as TK_TO_NUMERIC*/
#define OP_ToInt                              144   /* same as TK_TO_INT   */
#define OP_ToReal                             145   /* same as TK_TO_REAL  */
#define OP_Pagecount                          146
#define OP_MaxPgcnt                           147
#define OP_Trace                              148
#define OP_Noop                               149
#define OP_Explain                            150


................................................................................
#define OPFLG_OUT2_PRERELEASE 0x0002  /* out2-prerelease: */
#define OPFLG_IN1             0x0004  /* in1:   P1 is an input */
#define OPFLG_IN2             0x0008  /* in2:   P2 is an input */
#define OPFLG_IN3             0x0010  /* in3:   P3 is an input */
#define OPFLG_OUT2            0x0020  /* out2:  P2 is an output */
#define OPFLG_OUT3            0x0040  /* out3:  P3 is an output */
#define OPFLG_INITIALIZER {\
/*   0 */ 0x00, 0x00, 0x00, 0x00, 0x00, 0x01, 0x01, 0x01,\
/*   8 */ 0x00, 0x00, 0x02, 0x00, 0x01, 0x00, 0x01, 0x01,\
/*  16 */ 0x04, 0x04, 0x10, 0x24, 0x00, 0x02, 0x02, 0x02,\
/*  24 */ 0x02, 0x02, 0x02, 0x00, 0x00, 0x24, 0x00, 0x00,\
/*  32 */ 0x04, 0x05, 0x04, 0x00, 0x00, 0x01, 0x01, 0x05,\

/*  40 */ 0x05, 0x00, 0x00, 0x00, 0x02, 0x02, 0x10, 0x00,\
/*  48 */ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x11,\
/*  56 */ 0x11, 0x11, 0x11, 0x08, 0x11, 0x11, 0x11, 0x11,\

/*  64 */ 0x02, 0x02, 0x00, 0x00, 0x4c, 0x4c, 0x00, 0x00,\
/*  72 */ 0x00, 0x05, 0x05, 0x15, 0x15, 0x15, 0x15, 0x15,\
/*  80 */ 0x15, 0x00, 0x4c, 0x4c, 0x4c, 0x4c, 0x4c, 0x4c,\
/*  88 */ 0x4c, 0x4c, 0x4c, 0x4c, 0x00, 0x24, 0x02, 0x00,\
/*  96 */ 0x02, 0x00, 0x01, 0x01, 0x01, 0x01, 0x08, 0x08,\
/* 104 */ 0x00, 0x02, 0x01, 0x01, 0x02, 0x00, 0x02, 0x02,\
/* 112 */ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x0c, 0x45,\
/* 120 */ 0x15, 0x01, 0x02, 0x00, 0x01, 0x08, 0x05, 0x05,\

/* 128 */ 0x05, 0x00, 0x02, 0x01, 0x00, 0x00, 0x00, 0x00,\
/* 136 */ 0x00, 0x00, 0x00, 0x01, 0x00, 0x04, 0x04, 0x04,\
/* 144 */ 0x04, 0x04, 0x02, 0x02, 0x00, 0x00, 0x00,}

/************** End of opcodes.h *********************************************/
/************** Continuing where we left off in vdbe.h ***********************/

/*
** Prototypes for the VDBE interface.  See comments on the implementation
................................................................................
SQLITE_PRIVATE void sqlite3VdbeSetNumCols(Vdbe*,int);
SQLITE_PRIVATE int sqlite3VdbeSetColName(Vdbe*, int, int, const char *, void(*)(void*));
SQLITE_PRIVATE void sqlite3VdbeCountChanges(Vdbe*);
SQLITE_PRIVATE sqlite3 *sqlite3VdbeDb(Vdbe*);
SQLITE_PRIVATE void sqlite3VdbeSetSql(Vdbe*, const char *z, int n, int);
SQLITE_PRIVATE void sqlite3VdbeSwap(Vdbe*,Vdbe*);
SQLITE_PRIVATE VdbeOp *sqlite3VdbeTakeOpArray(Vdbe*, int*, int*);
SQLITE_PRIVATE sqlite3_value *sqlite3VdbeGetBoundValue(Vdbe*, int, u8);
SQLITE_PRIVATE void sqlite3VdbeSetVarmask(Vdbe*, int);
#ifndef SQLITE_OMIT_TRACE
SQLITE_PRIVATE   char *sqlite3VdbeExpandSql(Vdbe*, const char*);
#endif

SQLITE_PRIVATE void sqlite3VdbeRecordUnpack(KeyInfo*,int,const void*,UnpackedRecord*);
SQLITE_PRIVATE int sqlite3VdbeRecordCompare(int,const void*,UnpackedRecord*);
................................................................................
#define PAGER_JOURNALMODE_TRUNCATE    3   /* Commit by truncating journal */
#define PAGER_JOURNALMODE_MEMORY      4   /* In-memory journal file */
#define PAGER_JOURNALMODE_WAL         5   /* Use write-ahead logging */

/*
** Flags that make up the mask passed to sqlite3PagerAcquire().
*/
#define PAGER_GET_NOCONTENT     0x01  /* Do not load data from disk */
#define PAGER_GET_READONLY      0x02  /* Read-only page is acceptable */

/*
** Flags for sqlite3PagerSetFlags()
*/
#define PAGER_SYNCHRONOUS_OFF       0x01  /* PRAGMA synchronous=OFF */
#define PAGER_SYNCHRONOUS_NORMAL    0x02  /* PRAGMA synchronous=NORMAL */
#define PAGER_SYNCHRONOUS_FULL      0x03  /* PRAGMA synchronous=FULL */
#define PAGER_SYNCHRONOUS_MASK      0x03  /* Mask for three values above */
#define PAGER_FULLFSYNC             0x04  /* PRAGMA fullfsync=ON */
#define PAGER_CKPT_FULLFSYNC        0x08  /* PRAGMA checkpoint_fullfsync=ON */
#define PAGER_CACHESPILL            0x10  /* PRAGMA cache_spill=ON */
#define PAGER_FLAGS_MASK            0x1c  /* All above except SYNCHRONOUS */

/*
** The remainder of this file contains the declarations of the functions
** that make up the Pager sub-system API. See source code comments for 
** a detailed description of each routine.
*/

................................................................................
/* Functions used to configure a Pager object. */
SQLITE_PRIVATE void sqlite3PagerSetBusyhandler(Pager*, int(*)(void *), void *);
SQLITE_PRIVATE int sqlite3PagerSetPagesize(Pager*, u32*, int);
SQLITE_PRIVATE int sqlite3PagerMaxPageCount(Pager*, int);
SQLITE_PRIVATE void sqlite3PagerSetCachesize(Pager*, int);
SQLITE_PRIVATE void sqlite3PagerSetMmapLimit(Pager *, sqlite3_int64);
SQLITE_PRIVATE void sqlite3PagerShrink(Pager*);
SQLITE_PRIVATE void sqlite3PagerSetFlags(Pager*,unsigned);
SQLITE_PRIVATE int sqlite3PagerLockingMode(Pager *, int);
SQLITE_PRIVATE int sqlite3PagerSetJournalMode(Pager *, int);
SQLITE_PRIVATE int sqlite3PagerGetJournalMode(Pager*);
SQLITE_PRIVATE int sqlite3PagerOkToChangeJournalMode(Pager*);
SQLITE_PRIVATE i64 sqlite3PagerJournalSizeLimit(Pager *, i64);
SQLITE_PRIVATE sqlite3_backup **sqlite3PagerBackupPtr(Pager*);

................................................................................
** in the sqlite.aDb[] array.  aDb[0] is the main database file and
** aDb[1] is the database file used to hold temporary tables.  Additional
** databases may be attached.
*/
struct Db {
  char *zName;         /* Name of this database */
  Btree *pBt;          /* The B*Tree structure for this database file */

  u8 safety_level;     /* How aggressive at syncing data to disk */
  Schema *pSchema;     /* Pointer to database schema (possibly shared) */
};

/*
** An instance of the following structure stores a database schema.
**
................................................................................
  int aLimit[SQLITE_N_LIMIT];   /* Limits */
  struct sqlite3InitInfo {      /* Information used during initialization */
    int newTnum;                /* Rootpage of table being initialized */
    u8 iDb;                     /* Which db file is being initialized */
    u8 busy;                    /* TRUE if currently initializing */
    u8 orphanTrigger;           /* Last statement is orphaned TEMP trigger */
  } init;
  int nVdbeActive;              /* Number of VDBEs currently running */
  int nVdbeRead;                /* Number of active VDBEs that read or write */
  int nVdbeWrite;               /* Number of active VDBEs that read and write */
  int nVdbeExec;                /* Number of nested calls to VdbeExec() */
  int nExtension;               /* Number of loaded extensions */
  void **aExtension;            /* Array of shared library handles */
  void (*xTrace)(void*,const char*);        /* Trace function */
  void *pTraceArg;                          /* Argument to the trace function */
  void (*xProfile)(void*,const char*,u64);  /* Profiling function */
  void *pProfileArg;                        /* Argument to profile function */
  void *pCommitArg;                 /* Argument to xCommitCallback() */   
................................................................................
  int (*xAuth)(void*,int,const char*,const char*,const char*,const char*);
                                /* Access authorization function */
  void *pAuthArg;               /* 1st argument to the access auth function */
#endif
#ifndef SQLITE_OMIT_PROGRESS_CALLBACK
  int (*xProgress)(void *);     /* The progress callback */
  void *pProgressArg;           /* Argument to the progress callback */
  unsigned nProgressOps;        /* Number of opcodes for progress callback */
#endif
#ifndef SQLITE_OMIT_VIRTUALTABLE
  int nVTrans;                  /* Allocated size of aVTrans */
  Hash aModule;                 /* populated by sqlite3_create_module() */
  VtabCtx *pVtabCtx;            /* Context for active vtab connect/create */
  VTable **aVTrans;             /* Virtual tables with open transactions */
  VTable *pDisconnect;    /* Disconnect these in next sqlite3_prepare() */
................................................................................
  BusyHandler busyHandler;      /* Busy callback */
  Db aDbStatic[2];              /* Static space for the 2 default backends */
  Savepoint *pSavepoint;        /* List of active savepoints */
  int busyTimeout;              /* Busy handler timeout, in msec */
  int nSavepoint;               /* Number of non-transaction savepoints */
  int nStatement;               /* Number of nested statement-transactions  */
  i64 nDeferredCons;            /* Net deferred constraints this transaction. */
  i64 nDeferredImmCons;         /* Net deferred immediate constraints */
  int *pnBytesFreed;            /* If not NULL, increment this in DbFree() */

#ifdef SQLITE_ENABLE_UNLOCK_NOTIFY
  /* The following variables are all protected by the STATIC_MASTER 
  ** mutex, not by sqlite3.mutex. They are used by code in notify.c. 
  **
  ** When X.pUnlockConnection==Y, that means that X is waiting for Y to
................................................................................
#define ENC(db) ((db)->aDb[0].pSchema->enc)

/*
** Possible values for the sqlite3.flags.
*/
#define SQLITE_VdbeTrace      0x00000001  /* True to trace VDBE execution */
#define SQLITE_InternChanges  0x00000002  /* Uncommitted Hash table changes */
#define SQLITE_FullFSync      0x00000004  /* Use full fsync on the backend */
#define SQLITE_CkptFullFSync  0x00000008  /* Use full fsync for checkpoint */
#define SQLITE_CacheSpill     0x00000010  /* OK to spill pager cache */
#define SQLITE_FullColNames   0x00000020  /* Show full column names on SELECT */
#define SQLITE_ShortColNames  0x00000040  /* Show short columns names */
#define SQLITE_CountRows      0x00000080  /* Count rows changed by INSERT, */
                                          /*   DELETE, or UPDATE and return */
                                          /*   the count using a callback. */
#define SQLITE_NullCallback   0x00000100  /* Invoke the callback once if the */
                                          /*   result set is empty */
#define SQLITE_SqlTrace       0x00000200  /* Debug print SQL as it executes */
#define SQLITE_VdbeListing    0x00000400  /* Debug listings of VDBE programs */
#define SQLITE_WriteSchema    0x00000800  /* OK to update SQLITE_MASTER */
#define SQLITE_VdbeAddopTrace 0x00001000  /* Trace sqlite3VdbeAddOp() calls */
#define SQLITE_IgnoreChecks   0x00002000  /* Do not enforce check constraints */
#define SQLITE_ReadUncommitted 0x0004000  /* For shared-cache mode */
#define SQLITE_LegacyFileFmt  0x00008000  /* Create new databases in format 1 */


#define SQLITE_RecoveryMode   0x00010000  /* Ignore schema errors */
#define SQLITE_ReverseOrder   0x00020000  /* Reverse unordered SELECTs */
#define SQLITE_RecTriggers    0x00040000  /* Enable recursive triggers */
#define SQLITE_ForeignKeys    0x00080000  /* Enforce foreign key constraints  */
#define SQLITE_AutoIndex      0x00100000  /* Enable automatic indexes */
#define SQLITE_PreferBuiltin  0x00200000  /* Preference to built-in funcs */
#define SQLITE_LoadExtension  0x00400000  /* Enable load_extension */
#define SQLITE_EnableTrigger  0x00800000  /* True to enable triggers */
#define SQLITE_DeferFKs       0x01000000  /* Defer all FK constraints */
#define SQLITE_QueryOnly      0x02000000  /* Disable database changes */


/*
** Bits of the sqlite3.dbOptFlags field that are used by the
** sqlite3_test_control(SQLITE_TESTCTRL_OPTIMIZATIONS,...) interface to
** selectively disable various optimizations.
*/
#define SQLITE_QueryFlattener 0x0001   /* Query flattening */
................................................................................
#define SQLITE_FactorOutConst 0x0008   /* Constant factoring */
#define SQLITE_IdxRealAsInt   0x0010   /* Store REAL as INT in indices */
#define SQLITE_DistinctOpt    0x0020   /* DISTINCT using indexes */
#define SQLITE_CoverIdxScan   0x0040   /* Covering index scans */
#define SQLITE_OrderByIdxJoin 0x0080   /* ORDER BY of joins via index */
#define SQLITE_SubqCoroutine  0x0100   /* Evaluate subqueries as coroutines */
#define SQLITE_Transitive     0x0200   /* Transitive constraints */
#define SQLITE_OmitNoopJoin   0x0400   /* Omit unused tables in joins */
#define SQLITE_Stat3          0x0800   /* Use the SQLITE_STAT3 table */
#define SQLITE_AllOpts        0xffff   /* All optimizations */

/*
** Macros for testing whether or not optimizations are enabled or disabled.
*/
#ifndef SQLITE_OMIT_BUILTIN_TEST
#define OptimizationDisabled(db, mask)  (((db)->dbOptFlags&(mask))!=0)
................................................................................
** sqlite3.pSavepoint. The first element in the list is the most recently
** opened savepoint. Savepoints are added to the list by the vdbe
** OP_Savepoint instruction.
*/
struct Savepoint {
  char *zName;                        /* Savepoint name (nul-terminated) */
  i64 nDeferredCons;                  /* Number of deferred fk violations */
  i64 nDeferredImmCons;               /* Number of deferred imm fk. */
  Savepoint *pNext;                   /* Parent savepoint (if any) */
};

/*
** The following are used as the second parameter to sqlite3Savepoint(),
** and as the P1 argument to the OP_Savepoint instruction.
*/
................................................................................
#define OE_Default  99  /* Do whatever the default action is */


/*
** An instance of the following structure is passed as the first
** argument to sqlite3VdbeKeyCompare and is used to control the 
** comparison of the two index keys.
**
** Note that aSortOrder[] and aColl[] have nField+1 slots.  There
** are nField slots for the columns of an index then one extra slot
** for the rowid at the end.
*/
struct KeyInfo {
  sqlite3 *db;        /* The database connection */
  u8 enc;             /* Text encoding - one of the SQLITE_UTF* values */
  u16 nField;         /* Maximum index for aColl[] and aSortOrder[] */
  u8 *aSortOrder;     /* Sort order for each column. */
  CollSeq *aColl[1];  /* Collating sequence for each term of the key */
};

/*
** An instance of the following structure holds information about a
** single index record that has already been parsed out into individual
** values.
................................................................................
  tRowcnt *aiRowEst;       /* From ANALYZE: Est. rows selected by each column */
  Table *pTable;           /* The SQL table being indexed */
  char *zColAff;           /* String defining the affinity of each column */
  Index *pNext;            /* The next index associated with the same table */
  Schema *pSchema;         /* Schema containing this index */
  u8 *aSortOrder;          /* for each column: True==DESC, False==ASC */
  char **azColl;           /* Array of collation sequence names for index */
  Expr *pPartIdxWhere;     /* WHERE clause for partial indices */
  int tnum;                /* DB Page containing root of this index */
  u16 nColumn;             /* Number of columns in table used by this index */
  u8 onError;              /* OE_Abort, OE_Ignore, OE_Replace, or OE_None */
  unsigned autoIndex:2;    /* 1==UNIQUE, 2==PRIMARY KEY, 0==CREATE INDEX */
  unsigned bUnordered:1;   /* Use this index for == or IN queries only */
  unsigned uniqNotNull:1;  /* True if UNIQUE and NOT NULL for all columns */
#ifdef SQLITE_ENABLE_STAT3
  int nSample;             /* Number of elements in aSample[] */
  tRowcnt avgEq;           /* Average nEq value for key values not in aSample */
  IndexSample *aSample;    /* Samples of the left-most key */
#endif
};

................................................................................
typedef u64 Bitmask;

/*
** The number of bits in a Bitmask.  "BMS" means "BitMask Size".
*/
#define BMS  ((int)(sizeof(Bitmask)*8))

/*
** A bit in a Bitmask
*/
#define MASKBIT(n)   (((Bitmask)1)<<(n))

/*
** The following structure describes the FROM clause of a SELECT statement.
** Each table or subquery in the FROM clause is a separate element of
** the SrcList.a[] array.
**
** With the addition of multiple database support, the following structure
** can also be used to describe a particular table such as the table that
................................................................................
** But sqlite3SrcListShiftJoinType() later shifts the jointypes so that each
** jointype expresses the join between the table and the previous table.
**
** In the colUsed field, the high-order bit (bit 63) is set if the table
** contains more than 63 columns and the 64-th or later column is used.
*/
struct SrcList {
  u8 nSrc;        /* Number of tables or subqueries in the FROM clause */
  u8 nAlloc;      /* Number of entries allocated in a[] below */
  struct SrcList_item {
    Schema *pSchema;  /* Schema to which this item is fixed */
    char *zDatabase;  /* Name of database holding this table */
    char *zName;      /* Name of the table */
    char *zAlias;     /* The "B" part of a "A AS B" phrase.  zName is the "A" */
    Table *pTab;      /* An SQL table corresponding to zName */
    Select *pSelect;  /* A SELECT statement used in place of a table name */
................................................................................
#define JT_NATURAL   0x0004    /* True for a "natural" join */
#define JT_LEFT      0x0008    /* Left outer join */
#define JT_RIGHT     0x0010    /* Right outer join */
#define JT_OUTER     0x0020    /* The "OUTER" keyword is present */
#define JT_ERROR     0x0040    /* unknown or unsupported join type */











































































/*
** Flags appropriate for the wctrlFlags parameter of sqlite3WhereBegin()
** and the WhereInfo.wctrlFlags member.
*/
#define WHERE_ORDERBY_NORMAL   0x0000 /* No-op */
#define WHERE_ORDERBY_MIN      0x0001 /* ORDER BY processing for min() func */
#define WHERE_ORDERBY_MAX      0x0002 /* ORDER BY processing for max() func */
#define WHERE_ONEPASS_DESIRED  0x0004 /* Want to do one-pass UPDATE/DELETE */
#define WHERE_DUPLICATES_OK    0x0008 /* Ok to return a row more than once */
#define WHERE_OMIT_OPEN_CLOSE  0x0010 /* Table cursors are already open */
#define WHERE_FORCE_TABLE      0x0020 /* Do not use an index-only search */
#define WHERE_ONETABLE_ONLY    0x0040 /* Only code the 1st table in pTabList */
#define WHERE_AND_ONLY         0x0080 /* Don't use indices for OR terms */
#define WHERE_GROUPBY          0x0100 /* pOrderBy is really a GROUP BY */
#define WHERE_DISTINCTBY       0x0200 /* pOrderby is really a DISTINCT clause */
#define WHERE_WANT_DISTINCT    0x0400 /* All output needs to be distinct */




/* Allowed return values from sqlite3WhereIsDistinct()


*/



















#define WHERE_DISTINCT_NOOP      0  /* DISTINCT keyword not used */
#define WHERE_DISTINCT_UNIQUE    1  /* No duplicates */
#define WHERE_DISTINCT_ORDERED   2  /* All duplicates are adjacent */
#define WHERE_DISTINCT_UNORDERED 3  /* Duplicates are scattered */

/*
** A NameContext defines a context in which to resolve table and column
................................................................................
** NameContext in the parent query.  Thus the process of scanning the
** NameContext list corresponds to searching through successively outer
** subqueries looking for a match.
*/
struct NameContext {
  Parse *pParse;       /* The parser */
  SrcList *pSrcList;   /* One or more tables used to resolve names */
  ExprList *pEList;    /* Optional list of result-set columns */
  AggInfo *pAggInfo;   /* Information about aggregates at this level */
  NameContext *pNext;  /* Next outer name context.  NULL for outermost */
  int nRef;            /* Number of names resolved by this context */
  int nErr;            /* Number of errors encountered while resolving names */
  u8 ncFlags;          /* Zero or more NC_* flags defined below */
};

................................................................................
/*
** Allowed values for the NameContext, ncFlags field.
*/
#define NC_AllowAgg  0x01    /* Aggregate functions are allowed here */
#define NC_HasAgg    0x02    /* One or more aggregate functions seen */
#define NC_IsCheck   0x04    /* True if resolving names in a CHECK constraint */
#define NC_InAggFunc 0x08    /* True if analyzing arguments to an agg func */
#define NC_PartIdx   0x10    /* True if resolving a partial index WHERE */


/*
** An instance of the following structure contains all information
** needed to generate code for a single SELECT statement.
**
** nLimit is set to -1 if there is no LIMIT clause.  nOffset is set to 0.
** If there is a LIMIT clause, the parser sets nLimit to the value of the
................................................................................
*/
struct Select {
  ExprList *pEList;      /* The fields of the result */
  u8 op;                 /* One of: TK_UNION TK_ALL TK_INTERSECT TK_EXCEPT */
  u16 selFlags;          /* Various SF_* values */
  int iLimit, iOffset;   /* Memory registers holding LIMIT & OFFSET counters */
  int addrOpenEphm[3];   /* OP_OpenEphem opcodes related to this select */
  u64 nSelectRow;        /* Estimated number of result rows */
  SrcList *pSrc;         /* The FROM clause */
  Expr *pWhere;          /* The WHERE clause */
  ExprList *pGroupBy;    /* The GROUP BY clause */
  Expr *pHaving;         /* The HAVING clause */
  ExprList *pOrderBy;    /* The ORDER BY clause */
  Select *pPrior;        /* Prior select in a compound select statement */
  Select *pNext;         /* Next select to the left in a compound */
................................................................................
#define SF_UsesEphemeral   0x0008  /* Uses the OpenEphemeral opcode */
#define SF_Expanded        0x0010  /* sqlite3SelectExpand() called on this */
#define SF_HasTypeInfo     0x0020  /* FROM subqueries have Table metadata */
#define SF_UseSorter       0x0040  /* Sort using a sorter */
#define SF_Values          0x0080  /* Synthesized from VALUES clause */
#define SF_Materialize     0x0100  /* Force materialization of views */
#define SF_NestedFrom      0x0200  /* Part of a parenthesized FROM clause */
#define SF_MaybeConvert    0x0400  /* Need convertCompoundSelectToSubquery() */


/*
** The results of a select can be distributed in several ways.  The
** "SRT" prefix means "SELECT Result Type".
*/
#define SRT_Union        1  /* Store result as keys in an index */
................................................................................
  u8 nested;           /* Number of nested calls to the parser/code generator */
  u8 nTempReg;         /* Number of temporary registers in aTempReg[] */
  u8 nTempInUse;       /* Number of aTempReg[] currently checked out */
  u8 nColCache;        /* Number of entries in aColCache[] */
  u8 iColCache;        /* Next entry in aColCache[] to replace */
  u8 isMultiWrite;     /* True if statement may modify/insert multiple rows */
  u8 mayAbort;         /* True if statement may throw an ABORT exception */
  u8 hasCompound;      /* Need to invoke convertCompoundSelectToSubquery() */
  int aTempReg[8];     /* Holding area for temporary registers */
  int nRangeReg;       /* Size of the temporary register block */
  int iRangeReg;       /* First register in temporary register block */
  int nErr;            /* Number of errors seen */
  int nTab;            /* Number of previously allocated VDBE cursors */
  int nMem;            /* Number of memory cells used so far */
  int nSet;            /* Number of sets used so far */
  int nOnce;           /* Number of OP_Once instructions so far */
  int ckBase;          /* Base register of data during check constraints */
  int iPartIdxTab;     /* Table corresponding to a partial index */
  int iCacheLevel;     /* ColCache valid when aColCache[].iLevel<=iCacheLevel */
  int iCacheCnt;       /* Counter used to generate aColCache[].lru values */
  struct yColCache {
    int iTable;           /* Table cursor number */
    int iColumn;          /* Table column number */
    u8 tempReg;           /* iReg is a temp register that needs to be freed */
    int iLevel;           /* Nesting level */
................................................................................
  TableLock *aTableLock; /* Required table locks for shared-cache mode */
#endif
  AutoincInfo *pAinc;  /* Information about AUTOINCREMENT counters */

  /* Information used while coding trigger programs. */
  Parse *pToplevel;    /* Parse structure for main program (or NULL) */
  Table *pTriggerTab;  /* Table triggers are being coded for */
  u32 nQueryLoop;      /* Est number of iterations of a query (10*log2(N)) */
  u32 oldmask;         /* Mask of old.* columns referenced */
  u32 newmask;         /* Mask of new.* columns referenced */
  u8 eTriggerOp;       /* TK_UPDATE, TK_INSERT or TK_DELETE */
  u8 eOrconf;          /* Default ON CONFLICT policy for trigger steps */
  u8 disableTriggers;  /* True to disable triggers */

  /* Above is constant between recursions.  Below is reset before and after
................................................................................
struct StrAccum {
  sqlite3 *db;         /* Optional database for lookaside.  Can be NULL */
  char *zBase;         /* A base allocation.  Not from malloc. */
  char *zText;         /* The string collected so far */
  int  nChar;          /* Length of the string so far */
  int  nAlloc;         /* Amount of space allocated in zText */
  int  mxAlloc;        /* Maximum allowed string length */

  u8   useMalloc;      /* 0: none,  1: sqlite3DbMalloc,  2: sqlite3_malloc */

  u8   accError;       /* STRACCUM_NOMEM or STRACCUM_TOOBIG */
};
#define STRACCUM_NOMEM   1
#define STRACCUM_TOOBIG  2

/*
** A pointer to this structure is used to communicate information
** from sqlite3Init and OP_ParseSchema into the sqlite3InitCallback.
*/
typedef struct {
  sqlite3 *db;        /* The database being initialized */
................................................................................
SQLITE_PRIVATE void sqlite3SrcListIndexedBy(Parse *, SrcList *, Token *);
SQLITE_PRIVATE int sqlite3IndexedByLookup(Parse *, struct SrcList_item *);
SQLITE_PRIVATE void sqlite3SrcListShiftJoinType(SrcList*);
SQLITE_PRIVATE void sqlite3SrcListAssignCursors(Parse*, SrcList*);
SQLITE_PRIVATE void sqlite3IdListDelete(sqlite3*, IdList*);
SQLITE_PRIVATE void sqlite3SrcListDelete(sqlite3*, SrcList*);
SQLITE_PRIVATE Index *sqlite3CreateIndex(Parse*,Token*,Token*,SrcList*,ExprList*,int,Token*,
                          Expr*, int, int);
SQLITE_PRIVATE void sqlite3DropIndex(Parse*, SrcList*, int);
SQLITE_PRIVATE int sqlite3Select(Parse*, Select*, SelectDest*);
SQLITE_PRIVATE Select *sqlite3SelectNew(Parse*,ExprList*,SrcList*,Expr*,ExprList*,
                         Expr*,ExprList*,u16,Expr*,Expr*);
SQLITE_PRIVATE void sqlite3SelectDelete(sqlite3*, Select*);
SQLITE_PRIVATE Table *sqlite3SrcListLookup(Parse*, SrcList*);
SQLITE_PRIVATE int sqlite3IsReadOnly(Parse*, Table*, int);
................................................................................
#if defined(SQLITE_ENABLE_UPDATE_DELETE_LIMIT) && !defined(SQLITE_OMIT_SUBQUERY)
SQLITE_PRIVATE Expr *sqlite3LimitWhere(Parse*,SrcList*,Expr*,ExprList*,Expr*,Expr*,char*);
#endif
SQLITE_PRIVATE void sqlite3DeleteFrom(Parse*, SrcList*, Expr*);
SQLITE_PRIVATE void sqlite3Update(Parse*, SrcList*, ExprList*, Expr*, int);
SQLITE_PRIVATE WhereInfo *sqlite3WhereBegin(Parse*,SrcList*,Expr*,ExprList*,ExprList*,u16,int);
SQLITE_PRIVATE void sqlite3WhereEnd(WhereInfo*);
SQLITE_PRIVATE u64 sqlite3WhereOutputRowCount(WhereInfo*);
SQLITE_PRIVATE int sqlite3WhereIsDistinct(WhereInfo*);
SQLITE_PRIVATE int sqlite3WhereIsOrdered(WhereInfo*);
SQLITE_PRIVATE int sqlite3WhereContinueLabel(WhereInfo*);
SQLITE_PRIVATE int sqlite3WhereBreakLabel(WhereInfo*);
SQLITE_PRIVATE int sqlite3WhereOkOnePass(WhereInfo*);
SQLITE_PRIVATE int sqlite3ExprCodeGetColumn(Parse*, Table*, int, int, int, u8);
SQLITE_PRIVATE void sqlite3ExprCodeGetColumnOfTable(Vdbe*, Table*, int, int, int);
SQLITE_PRIVATE void sqlite3ExprCodeMove(Parse*, int, int, int);
SQLITE_PRIVATE void sqlite3ExprCacheStore(Parse*, int, int, int);
SQLITE_PRIVATE void sqlite3ExprCachePush(Parse*);
SQLITE_PRIVATE void sqlite3ExprCachePop(Parse*, int);
SQLITE_PRIVATE void sqlite3ExprCacheRemove(Parse*, int, int);
................................................................................
SQLITE_PRIVATE Table *sqlite3LocateTableItem(Parse*,int isView,struct SrcList_item *);
SQLITE_PRIVATE Index *sqlite3FindIndex(sqlite3*,const char*, const char*);
SQLITE_PRIVATE void sqlite3UnlinkAndDeleteTable(sqlite3*,int,const char*);
SQLITE_PRIVATE void sqlite3UnlinkAndDeleteIndex(sqlite3*,int,const char*);
SQLITE_PRIVATE void sqlite3Vacuum(Parse*);
SQLITE_PRIVATE int sqlite3RunVacuum(char**, sqlite3*);
SQLITE_PRIVATE char *sqlite3NameFromToken(sqlite3*, Token*);
SQLITE_PRIVATE int sqlite3ExprCompare(Expr*, Expr*, int);
SQLITE_PRIVATE int sqlite3ExprListCompare(ExprList*, ExprList*, int);
SQLITE_PRIVATE int sqlite3ExprImpliesExpr(Expr*, Expr*, int);
SQLITE_PRIVATE void sqlite3ExprAnalyzeAggregates(NameContext*, Expr*);
SQLITE_PRIVATE void sqlite3ExprAnalyzeAggList(NameContext*,ExprList*);
SQLITE_PRIVATE int sqlite3FunctionUsesThisSrc(Expr*, SrcList*);
SQLITE_PRIVATE Vdbe *sqlite3GetVdbe(Parse*);
SQLITE_PRIVATE void sqlite3PrngSaveState(void);
SQLITE_PRIVATE void sqlite3PrngRestoreState(void);
SQLITE_PRIVATE void sqlite3PrngResetState(void);
................................................................................
SQLITE_PRIVATE int sqlite3ExprIsInteger(Expr*, int*);
SQLITE_PRIVATE int sqlite3ExprCanBeNull(const Expr*);
SQLITE_PRIVATE void sqlite3ExprCodeIsNullJump(Vdbe*, const Expr*, int, int);
SQLITE_PRIVATE int sqlite3ExprNeedsNoAffinityChange(const Expr*, char);
SQLITE_PRIVATE int sqlite3IsRowid(const char*);
SQLITE_PRIVATE void sqlite3GenerateRowDelete(Parse*, Table*, int, int, int, Trigger *, int);
SQLITE_PRIVATE void sqlite3GenerateRowIndexDelete(Parse*, Table*, int, int*);
SQLITE_PRIVATE int sqlite3GenerateIndexKey(Parse*, Index*, int, int, int, int*);
SQLITE_PRIVATE void sqlite3GenerateConstraintChecks(Parse*,Table*,int,int,
                                     int*,int,int,int,int,int*);
SQLITE_PRIVATE void sqlite3CompleteInsertion(Parse*, Table*, int, int, int*, int, int, int);
SQLITE_PRIVATE int sqlite3OpenTableAndIndices(Parse*, Table*, int, int);
SQLITE_PRIVATE void sqlite3BeginWriteOperation(Parse*, int, int);
SQLITE_PRIVATE void sqlite3MultiWrite(Parse*);
SQLITE_PRIVATE void sqlite3MayAbort(Parse*);
................................................................................
SQLITE_PRIVATE void sqlite3NestedParse(Parse*, const char*, ...);
SQLITE_PRIVATE void sqlite3ExpirePreparedStatements(sqlite3*);
SQLITE_PRIVATE int sqlite3CodeSubselect(Parse *, Expr *, int, int);
SQLITE_PRIVATE void sqlite3SelectPrep(Parse*, Select*, NameContext*);
SQLITE_PRIVATE int sqlite3MatchSpanName(const char*, const char*, const char*, const char*);
SQLITE_PRIVATE int sqlite3ResolveExprNames(NameContext*, Expr*);
SQLITE_PRIVATE void sqlite3ResolveSelectNames(Parse*, Select*, NameContext*);
SQLITE_PRIVATE void sqlite3ResolveSelfReference(Parse*,Table*,int,Expr*,ExprList*);
SQLITE_PRIVATE int sqlite3ResolveOrderGroupBy(Parse*, Select*, ExprList*, const char*);
SQLITE_PRIVATE void sqlite3ColumnDefault(Vdbe *, Table *, int, int);
SQLITE_PRIVATE void sqlite3AlterFinishAddColumn(Parse *, Token *);
SQLITE_PRIVATE void sqlite3AlterBeginAddColumn(Parse *, SrcList *);
SQLITE_PRIVATE CollSeq *sqlite3GetCollSeq(Parse*, u8, CollSeq *, const char*);
SQLITE_PRIVATE char sqlite3AffinityType(const char*);
SQLITE_PRIVATE void sqlite3Analyze(Parse*, Token*, Token*);
................................................................................
SQLITE_PRIVATE void sqlite3DefaultRowEst(Index*);
SQLITE_PRIVATE void sqlite3RegisterLikeFunctions(sqlite3*, int);
SQLITE_PRIVATE int sqlite3IsLikeFunction(sqlite3*,Expr*,int*,char*);
SQLITE_PRIVATE void sqlite3MinimumFileFormat(Parse*, int, int);
SQLITE_PRIVATE void sqlite3SchemaClear(void *);
SQLITE_PRIVATE Schema *sqlite3SchemaGet(sqlite3 *, Btree *);
SQLITE_PRIVATE int sqlite3SchemaToIndex(sqlite3 *db, Schema *);
SQLITE_PRIVATE KeyInfo *sqlite3KeyInfoAlloc(sqlite3*,int);
SQLITE_PRIVATE KeyInfo *sqlite3IndexKeyinfo(Parse *, Index *);
SQLITE_PRIVATE int sqlite3CreateFunc(sqlite3 *, const char *, int, int, void *, 
  void (*)(sqlite3_context*,int,sqlite3_value **),
  void (*)(sqlite3_context*,int,sqlite3_value **), void (*)(sqlite3_context*),
  FuncDestructor *pDestructor
);
SQLITE_PRIVATE int sqlite3ApiExit(sqlite3 *db, int);
................................................................................
#  define sqlite3VtabUnlock(X)
#  define sqlite3VtabUnlockList(X)
#  define sqlite3VtabSavepoint(X, Y, Z) SQLITE_OK
#  define sqlite3GetVTable(X,Y)  ((VTable*)0)
#else
SQLITE_PRIVATE    void sqlite3VtabClear(sqlite3 *db, Table*);
SQLITE_PRIVATE    void sqlite3VtabDisconnect(sqlite3 *db, Table *p);
SQLITE_PRIVATE    int sqlite3VtabSync(sqlite3 *db, Vdbe*);
SQLITE_PRIVATE    int sqlite3VtabRollback(sqlite3 *db);
SQLITE_PRIVATE    int sqlite3VtabCommit(sqlite3 *db);
SQLITE_PRIVATE    void sqlite3VtabLock(VTable *);
SQLITE_PRIVATE    void sqlite3VtabUnlock(VTable *);
SQLITE_PRIVATE    void sqlite3VtabUnlockList(sqlite3*);
SQLITE_PRIVATE    int sqlite3VtabSavepoint(sqlite3 *, int, int);
SQLITE_PRIVATE    void sqlite3VtabImportErrmsg(Vdbe*, sqlite3_vtab*);
SQLITE_PRIVATE    VTable *sqlite3GetVTable(sqlite3*, Table*);
#  define sqlite3VtabInSync(db) ((db)->nVTrans>0 && (db)->aVTrans==0)
#endif
SQLITE_PRIVATE void sqlite3VtabMakeWritable(Parse*,Table*);
SQLITE_PRIVATE void sqlite3VtabBeginParse(Parse*, Token*, Token*, Token*, int);
SQLITE_PRIVATE void sqlite3VtabFinishParse(Parse*, Token*);
SQLITE_PRIVATE void sqlite3VtabArgInit(Parse*);
................................................................................

/* Opaque type used by code in vdbesort.c */
typedef struct VdbeSorter VdbeSorter;

/* Opaque type used by the explainer */
typedef struct Explain Explain;

/* Elements of the linked list at Vdbe.pAuxData */
typedef struct AuxData AuxData;

/*
** A cursor is a pointer into a single BTree within a database file.
** The cursor can seek to a BTree entry with a particular key, or
** loop over all entries of the Btree.  You can also insert new BTree
** entries or retrieve the key or data from the entry that the cursor
** is currently pointing to.
** 
................................................................................
** Return true if a memory cell is not marked as invalid.  This macro
** is for use inside assert() statements only.
*/
#ifdef SQLITE_DEBUG
#define memIsValid(M)  ((M)->flags & MEM_Invalid)==0
#endif


/*
** Each auxilliary data pointer stored by a user defined function 
** implementation calling sqlite3_set_auxdata() is stored in an instance
** of this structure. All such structures associated with a single VM
** are stored in a linked list headed at Vdbe.pAuxData. All are destroyed
** when the VM is halted (if not before).



*/



struct AuxData {
  int iOp;                        /* Instruction number of OP_Function opcode */
  int iArg;                       /* Index of function argument. */
  void *pAux;                     /* Aux data pointer */
  void (*xDelete)(void *);        /* Destructor for the aux data */

  AuxData *pNext;                 /* Next element in list */
};

/*
** The "context" argument for a installable function.  A pointer to an
** instance of this structure is the first argument to the routines used
** implement the SQL functions.
**
................................................................................
** structure are known.
**
** This structure is defined inside of vdbeInt.h because it uses substructures
** (Mem) which are only defined there.
*/
struct sqlite3_context {
  FuncDef *pFunc;       /* Pointer to function information.  MUST BE FIRST */

  Mem s;                /* The return value is stored here */
  Mem *pMem;            /* Memory cell used to store aggregate context */
  CollSeq *pColl;       /* Collating sequence */
  Vdbe *pVdbe;          /* The VM that owns this context */
  int iOp;              /* Instruction number of OP_Function */
  int isError;          /* Error code returned by the function. */
  u8 skipFlag;          /* Skip skip accumulator loading if true */
  u8 fErrorOrAux;       /* isError!=0 or pVdbe->pAuxData modified */
};

/*
** An Explain object accumulates indented output which is helpful
** in describing recursive data structures.
*/
struct Explain {
................................................................................
  u8 minWriteFileFormat;  /* Minimum file format for writable database files */
  bft explain:2;          /* True if EXPLAIN present on SQL command */
  bft inVtabMethod:2;     /* See comments above */
  bft changeCntOn:1;      /* True to update the change-counter */
  bft expired:1;          /* True if the VM needs to be recompiled */
  bft runOnlyOnce:1;      /* Automatically expire on reset */
  bft usesStmtJournal:1;  /* True if uses a statement journal */
  bft readOnly:1;         /* True for statements that do not write */
  bft bIsReader:1;        /* True for statements that read */
  bft isPrepareV2:1;      /* True if prepared with prepare_v2() */
  bft doingRerun:1;       /* True if rerunning after an auto-reprepare */
  int nChange;            /* Number of db changes made since last reset */
  yDbMask btreeMask;      /* Bitmask of db->aDb[] entries referenced */
  yDbMask lockMask;       /* Subset of btreeMask that requires a lock */
  int iStatement;         /* Statement number (or 0 if has not opened stmt) */
  u32 aCounter[5];        /* Counters used by sqlite3_stmt_status() */
#ifndef SQLITE_OMIT_TRACE
  i64 startTime;          /* Time when query started - used for profiling */
#endif
  i64 nFkConstraint;      /* Number of imm. FK constraints this VM */
  i64 nStmtDefCons;       /* Number of def. constraints when stmt started */
  i64 nStmtDefImmCons;    /* Number of def. imm constraints when stmt started */
  char *zSql;             /* Text of the SQL statement that generated this */
  void *pFree;            /* Free this when deleting the vdbe */
#ifdef SQLITE_DEBUG
  FILE *trace;            /* Write an execution trace here, if not NULL */
#endif
#ifdef SQLITE_ENABLE_TREE_EXPLAIN
  Explain *pExplain;      /* The explainer */
................................................................................
  VdbeFrame *pFrame;      /* Parent frame */
  VdbeFrame *pDelFrame;   /* List of frame objects to free on VM reset */
  int nFrame;             /* Number of frames in pFrame list */
  u32 expmask;            /* Binding to these vars invalidates VM */
  SubProgram *pProgram;   /* Linked list of all sub-programs used by VM */
  int nOnceFlag;          /* Size of array aOnceFlag[] */
  u8 *aOnceFlag;          /* Flags for OP_Once */
  AuxData *pAuxData;      /* Linked list of auxdata allocations */
};

/*
** The following are allowed values for Vdbe.magic
*/
#define VDBE_MAGIC_INIT     0x26bceaa5    /* Building a VDBE program */
#define VDBE_MAGIC_RUN      0xbdf20da3    /* VDBE is ready to execute */
................................................................................
#if defined(SQLITE_DEBUG) || defined(VDBE_PROFILE)
SQLITE_PRIVATE void sqlite3VdbePrintOp(FILE*, int, Op*);
#endif
SQLITE_PRIVATE u32 sqlite3VdbeSerialTypeLen(u32);
SQLITE_PRIVATE u32 sqlite3VdbeSerialType(Mem*, int);
SQLITE_PRIVATE u32 sqlite3VdbeSerialPut(unsigned char*, int, Mem*, int);
SQLITE_PRIVATE u32 sqlite3VdbeSerialGet(const unsigned char*, u32, Mem*);
SQLITE_PRIVATE void sqlite3VdbeDeleteAuxData(Vdbe*, int, int);

int sqlite2BtreeKeyCompare(BtCursor *, const void *, int, int, int *);
SQLITE_PRIVATE int sqlite3VdbeIdxKeyCompare(VdbeCursor*,UnpackedRecord*,int*);
SQLITE_PRIVATE int sqlite3VdbeIdxRowid(sqlite3*, BtCursor *, i64 *);
SQLITE_PRIVATE int sqlite3MemCompare(const Mem*, const Mem*, const CollSeq*);
SQLITE_PRIVATE int sqlite3VdbeExec(Vdbe*);
SQLITE_PRIVATE int sqlite3VdbeList(Vdbe*);
................................................................................
          sqlite3PagerCacheStat(pPager, op, resetFlag, &nRet);
        }
      }
      *pHighwater = 0;
      *pCurrent = nRet;
      break;
    }

    /* Set *pCurrent to non-zero if there are unresolved deferred foreign
    ** key constraints.  Set *pCurrent to zero if all foreign key constraints
    ** have been satisfied.  The *pHighwater is always set to zero.
    */
    case SQLITE_DBSTATUS_DEFERRED_FKS: {
      *pHighwater = 0;
      *pCurrent = db->nDeferredImmCons>0 || db->nDeferredCons>0;
      break;
    }

    default: {
      rc = SQLITE_ERROR;
    }
  }
  sqlite3_mutex_leave(db->mutex);
  return rc;
................................................................................
  ** of each block.  One byte per block.
  */
  u8 *aCtrl;

} mem5;

/*
** Access the static variable through a macro for SQLITE_OMIT_WSD.
*/
#define mem5 GLOBAL(struct Mem5Global, mem5)

/*
** Assuming mem5.zPool is divided up into an array of Mem5Link
** structures, return a pointer to the idx-th such link.
*/
#define MEM5LINK(idx) ((Mem5Link *)(&mem5.zPool[(idx)*mem5.szAtom]))

/*
** Unlink the chunk at mem5.aPool[i] from list it is currently
** on.  It should be found on mem5.aiFreelist[iLogsize].
*/
................................................................................
  return iFirst;
}

/*
** Return a block of memory of at least nBytes in size.
** Return NULL if unable.  Return NULL if nBytes==0.
**
** The caller guarantees that nByte is positive.
**
** The caller has obtained a mutex prior to invoking this
** routine so there is never any chance that two or more
** threads can be in this routine at the same time.
*/
static void *memsys5MallocUnsafe(int nByte){
  int i;           /* Index of a mem5.aPool[] slot */
................................................................................
    }
    size *= 2;
  }
  memsys5Link(iBlock, iLogsize);
}

/*
** Allocate nBytes of memory.
*/
static void *memsys5Malloc(int nBytes){
  sqlite3_int64 *p = 0;
  if( nBytes>0 ){
    memsys5Enter();
    p = memsys5MallocUnsafe(nBytes);
    memsys5Leave();
................................................................................
        if( precision<etBUFSIZE-10 ){
          nOut = etBUFSIZE;
          zOut = buf;
        }else{
          nOut = precision + 10;
          zOut = zExtra = sqlite3Malloc( nOut );
          if( zOut==0 ){
            pAccum->accError = STRACCUM_NOMEM;
            return;
          }
        }
        bufpt = &zOut[nOut-1];
        if( xtype==etORDINAL ){
          static const char zOrd[] = "thstndrd";
          int x = (int)(longvalue % 10);
................................................................................
          prefix = '-';
        }else{
          if( flag_plussign )          prefix = '+';
          else if( flag_blanksign )    prefix = ' ';
          else                         prefix = 0;
        }
        if( xtype==etGENERIC && precision>0 ) precision--;





        for(idx=precision, rounder=0.5; idx>0; idx--, rounder*=0.1){}

        if( xtype==etFLOAT ) realvalue += rounder;
        /* Normalize realvalue to within 10.0 > realvalue >= 1.0 */
        exp = 0;
        if( sqlite3IsNaN((double)realvalue) ){
          bufpt = "NaN";
          length = 3;
          break;
................................................................................
          flag_rtz = flag_altform2;
        }
        if( xtype==etEXP ){
          e2 = 0;
        }else{
          e2 = exp;
        }
        if( MAX(e2,0)+precision+width > etBUFSIZE - 15 ){
          bufpt = zExtra = sqlite3Malloc( MAX(e2,0)+precision+width+15 );
          if( bufpt==0 ){
            pAccum->accError = STRACCUM_NOMEM;
            return;
          }
        }
        zOut = bufpt;
        nsd = 16 + flag_altform2*10;
        flag_dp = (precision>0 ?1:0) | flag_alternateform | flag_altform2;
        /* The sign in front of the number */
................................................................................
          if( ch==q )  n++;
        }
        needQuote = !isnull && xtype==etSQLESCAPE2;
        n += i + 1 + needQuote*2;
        if( n>etBUFSIZE ){
          bufpt = zExtra = sqlite3Malloc( n );
          if( bufpt==0 ){
            pAccum->accError = STRACCUM_NOMEM;
            return;
          }
        }else{
          bufpt = buf;
        }
        j = 0;
        if( needQuote ) bufpt[j++] = q;
................................................................................
} /* End of function */

/*
** Append N bytes of text from z to the StrAccum object.
*/
SQLITE_PRIVATE void sqlite3StrAccumAppend(StrAccum *p, const char *z, int N){
  assert( z!=0 || N==0 );
  if( p->accError ){
    testcase(p->accError==STRACCUM_TOOBIG);
    testcase(p->accError==STRACCUM_NOMEM);
    return;
  }
  assert( p->zText!=0 || p->nChar==0 );
  if( N<=0 ){
    if( N==0 || z[0]==0 ) return;
    N = sqlite3Strlen30(z);
  }



  if( p->nChar+N >= p->nAlloc ){
    char *zNew;
    if( !p->useMalloc ){
      p->accError = STRACCUM_TOOBIG;
      N = p->nAlloc - p->nChar - 1;
      if( N<=0 ){
        return;
      }
    }else{
      char *zOld = (p->zText==p->zBase ? 0 : p->zText);
      i64 szNew = p->nChar;
      szNew += N + 1;
      if( szNew > p->mxAlloc ){
        sqlite3StrAccumReset(p);
        p->accError = STRACCUM_TOOBIG;
        return;
      }else{
        p->nAlloc = (int)szNew;
      }
      if( p->useMalloc==1 ){
        zNew = sqlite3DbRealloc(p->db, zOld, p->nAlloc);
      }else{
        zNew = sqlite3_realloc(zOld, p->nAlloc);
      }
      if( zNew ){
        if( zOld==0 && p->nChar>0 ) memcpy(zNew, p->zText, p->nChar);
        p->zText = zNew;
      }else{
        p->accError = STRACCUM_NOMEM;
        sqlite3StrAccumReset(p);
        return;
      }
    }
  }
  assert( p->zText );
  memcpy(&p->zText[p->nChar], z, N);
................................................................................
        p->zText = sqlite3DbMallocRaw(p->db, p->nChar+1 );
      }else{
        p->zText = sqlite3_malloc(p->nChar+1);
      }
      if( p->zText ){
        memcpy(p->zText, p->zBase, p->nChar+1);
      }else{
        p->accError = STRACCUM_NOMEM;
      }
    }
  }
  return p->zText;
}

/*
................................................................................
SQLITE_PRIVATE void sqlite3StrAccumInit(StrAccum *p, char *zBase, int n, int mx){
  p->zText = p->zBase = zBase;
  p->db = 0;
  p->nChar = 0;
  p->nAlloc = n;
  p->mxAlloc = mx;
  p->useMalloc = 1;
  p->accError = 0;

}

/*
** Print into memory obtained from sqliteMalloc().  Use the internal
** %-conversion extensions.
*/
SQLITE_PRIVATE char *sqlite3VMPrintf(sqlite3 *db, const char *zFormat, va_list ap){
................................................................................
  StrAccum acc;
  assert( db!=0 );
  sqlite3StrAccumInit(&acc, zBase, sizeof(zBase),
                      db->aLimit[SQLITE_LIMIT_LENGTH]);
  acc.db = db;
  sqlite3VXPrintf(&acc, 1, zFormat, ap);
  z = sqlite3StrAccumFinish(&acc);
  if( acc.accError==STRACCUM_NOMEM ){
    db->mallocFailed = 1;
  }
  return z;
}

/*
** Print into memory obtained from sqliteMalloc().  Use the internal
................................................................................
static SQLITE_WSD struct sqlite3PrngType {
  unsigned char isInit;          /* True if initialized */
  unsigned char i, j;            /* State variables */
  unsigned char s[256];          /* State variables */
} sqlite3Prng;

/*
** Return N random bytes.













*/

SQLITE_API void sqlite3_randomness(int N, void *pBuf){
  unsigned char t;

  unsigned char *zBuf = pBuf;

  /* The "wsdPrng" macro will resolve to the pseudo-random number generator
  ** state vector.  If writable static data is unsupported on the target,
  ** we have to locate the state vector at run-time.  In the more common
  ** case where writable static data is supported, wsdPrng can refer directly
  ** to the "sqlite3Prng" state vector declared above.
  */
................................................................................
#ifdef SQLITE_OMIT_WSD
  struct sqlite3PrngType *p = &GLOBAL(struct sqlite3PrngType, sqlite3Prng);
# define wsdPrng p[0]
#else
# define wsdPrng sqlite3Prng
#endif

#if SQLITE_THREADSAFE
  sqlite3_mutex *mutex = sqlite3MutexAlloc(SQLITE_MUTEX_STATIC_PRNG);
  sqlite3_mutex_enter(mutex);
#endif

  /* Initialize the state of the random number generator once,
  ** the first time this routine is called.  The seed value does
  ** not need to contain a lot of randomness since we are not
  ** trying to do secure encryption or anything like that...
  **
  ** Nothing in this file or anywhere else in SQLite does any kind of
................................................................................
      t = wsdPrng.s[wsdPrng.j];
      wsdPrng.s[wsdPrng.j] = wsdPrng.s[i];
      wsdPrng.s[i] = t;
    }
    wsdPrng.isInit = 1;
  }

  while( N-- ){

    wsdPrng.i++;
    t = wsdPrng.s[wsdPrng.i];
    wsdPrng.j += t;
    wsdPrng.s[wsdPrng.i] = wsdPrng.s[wsdPrng.j];
    wsdPrng.s[wsdPrng.j] = t;
    t += wsdPrng.s[wsdPrng.i];
    *(zBuf++) = wsdPrng.s[t];













  }
  sqlite3_mutex_leave(mutex);
}

#ifndef SQLITE_OMIT_BUILTIN_TEST
/*
** For testing purposes, we sometimes want to preserve the state of
................................................................................
/************** End of hash.c ************************************************/
/************** Begin file opcodes.c *****************************************/
/* Automatically generated.  Do not edit */
/* See the mkopcodec.awk script for details. */
#if !defined(SQLITE_OMIT_EXPLAIN) || !defined(NDEBUG) || defined(VDBE_PROFILE) || defined(SQLITE_DEBUG)
SQLITE_PRIVATE const char *sqlite3OpcodeName(int i){
 static const char *const azName[] = { "?",
     /*   1 */ "Function",
     /*   2 */ "Savepoint",
     /*   3 */ "AutoCommit",
     /*   4 */ "Transaction",
     /*   5 */ "SorterNext",
     /*   6 */ "Prev",
     /*   7 */ "Next",
     /*   8 */ "AggStep",
     /*   9 */ "Checkpoint",
     /*  10 */ "JournalMode",
     /*  11 */ "Vacuum",
     /*  12 */ "VFilter",
     /*  13 */ "VUpdate",
     /*  14 */ "Goto",
     /*  15 */ "Gosub",
     /*  16 */ "Return",
     /*  17 */ "Yield",
     /*  18 */ "HaltIfNull",
     /*  19 */ "Not",
     /*  20 */ "Halt",
     /*  21 */ "Integer",
     /*  22 */ "Int64",
     /*  23 */ "String",
     /*  24 */ "Null",
     /*  25 */ "Blob",
     /*  26 */ "Variable",
     /*  27 */ "Move",
     /*  28 */ "Copy",
     /*  29 */ "SCopy",
     /*  30 */ "ResultRow",
     /*  31 */ "CollSeq",
     /*  32 */ "AddImm",
     /*  33 */ "MustBeInt",
     /*  34 */ "RealAffinity",
     /*  35 */ "Permutation",
     /*  36 */ "Compare",
     /*  37 */ "Jump",
     /*  38 */ "Once",
     /*  39 */ "If",
     /*  40 */ "IfNot",
     /*  41 */ "Column",
     /*  42 */ "Affinity",
     /*  43 */ "MakeRecord",
     /*  44 */ "Count",
     /*  45 */ "ReadCookie",
     /*  46 */ "SetCookie",
     /*  47 */ "VerifyCookie",
     /*  48 */ "OpenRead",
     /*  49 */ "OpenWrite",
     /*  50 */ "OpenAutoindex",
     /*  51 */ "OpenEphemeral",
     /*  52 */ "SorterOpen",
     /*  53 */ "OpenPseudo",
     /*  54 */ "Close",
     /*  55 */ "SeekLt",
     /*  56 */ "SeekLe",
     /*  57 */ "SeekGe",
     /*  58 */ "SeekGt",
     /*  59