</table>
    </div>
    <div id="mainSection">
    <div id="mainBody">
    <h1 class="heading">Version History</h1>
    <p><b>1.0.91.0 - February XX, 2014 <font color="red">(release scheduled)</font></b></p>
    <ul>

      <li>Add support for <a href="http://entityframework.codeplex.com/">Entity Framework 6</a>.</li>
      <li>Modify the namespace used for all internal classes in the System.Data.SQLite.Linq assembly.&nbsp;<b>** Potentially Incompatible Change **</b></li>
      <li>Add SQLiteCompileOptions and InteropCompileOptions properties to the SQLiteConnection class to return the compile-time options for the SQLite core library and interop assembly, respectively.</li>
      <li>Add BindInvariantText and ConvertInvariantText connection flags to force the invariant culture to be used when converting parameter values to/from strings.</li>
      <li>Add NoConnectionPool and UseConnectionPool connection flags to disable or enable connection pooling by default.</li>
      <li>Modify handling of the design-time components installer to run Visual Studio <b>devenv.exe /setup</b> after installing the package. This appears to be necessary in some circumstances for Visual Studio 2013. Pursuant to <a href="http://system.data.sqlite.org/index.html/info/a47eff2c71">[a47eff2c71]</a>.</li>
      <li>Modify the native library pre-loader to support reading settings from an XML configuration file and to be capable of checking more than one directory. Persuant to <a href="http://system.data.sqlite.org/index.html/info/f0246d1817">[f0246d1817]</a>.</li>

      </table>
    </div>
    <div id="mainSection">
    <div id="mainBody">
    <h1 class="heading">Version History</h1>
    <p><b>1.0.91.0 - February XX, 2014 <font color="red">(release scheduled)</font></b></p>
    <ul>
      <li>Updated to <a href="http://www.sqlite.org/src/info/trunk">SQLite 3.8.3</a>.</li>
      <li>Add support for <a href="http://entityframework.codeplex.com/">Entity Framework 6</a>.</li>
      <li>Modify the namespace used for all internal classes in the System.Data.SQLite.Linq assembly.&nbsp;<b>** Potentially Incompatible Change **</b></li>
      <li>Add SQLiteCompileOptions and InteropCompileOptions properties to the SQLiteConnection class to return the compile-time options for the SQLite core library and interop assembly, respectively.</li>
      <li>Add BindInvariantText and ConvertInvariantText connection flags to force the invariant culture to be used when converting parameter values to/from strings.</li>
      <li>Add NoConnectionPool and UseConnectionPool connection flags to disable or enable connection pooling by default.</li>
      <li>Modify handling of the design-time components installer to run Visual Studio <b>devenv.exe /setup</b> after installing the package. This appears to be necessary in some circumstances for Visual Studio 2013. Pursuant to <a href="http://system.data.sqlite.org/index.html/info/a47eff2c71">[a47eff2c71]</a>.</li>
      <li>Modify the native library pre-loader to support reading settings from an XML configuration file and to be capable of checking more than one directory. Persuant to <a href="http://system.data.sqlite.org/index.html/info/f0246d1817">[f0246d1817]</a>.</li>

 *
 * 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>3.8.2</SQLITE_MANIFEST_VERSION>
    <SQLITE_RC_VERSION>3,8,2</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_STAT4=1;SQLITE_ENABLE_FTS3=1;SQLITE_ENABLE_LOAD_EXTENSION=1;SQLITE_ENABLE_RTREE=1;SQLITE_SOUNDEX=1;SQLITE_ENABLE_MEMORY_MANAGEMENT=1</SQLITE_COMMON_DEFINES>
    <SQLITE_EXTRA_DEFINES>SQLITE_HAS_CODEC=1</SQLITE_EXTRA_DEFINES>
    <SQLITE_WINCE_200X_DEFINES>SQLITE_OMIT_WAL=1</SQLITE_WINCE_200X_DEFINES>
    <SQLITE_WINCE_2013_DEFINES>HAVE_ERRNO_H=1;SQLITE_MSVC_LOCALTIME_API=1</SQLITE_WINCE_2013_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>

 *
 * 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>3.8.3</SQLITE_MANIFEST_VERSION>
    <SQLITE_RC_VERSION>3,8,3</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_STAT4=1;SQLITE_ENABLE_FTS3=1;SQLITE_ENABLE_LOAD_EXTENSION=1;SQLITE_ENABLE_RTREE=1;SQLITE_SOUNDEX=1;SQLITE_ENABLE_MEMORY_MANAGEMENT=1</SQLITE_COMMON_DEFINES>
    <SQLITE_EXTRA_DEFINES>SQLITE_HAS_CODEC=1</SQLITE_EXTRA_DEFINES>
    <SQLITE_WINCE_200X_DEFINES>SQLITE_OMIT_WAL=1</SQLITE_WINCE_200X_DEFINES>
    <SQLITE_WINCE_2013_DEFINES>HAVE_ERRNO_H=1;SQLITE_MSVC_LOCALTIME_API=1</SQLITE_WINCE_2013_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>

<VisualStudioPropertySheet
	ProjectType="Visual C++"
	Version="8.00"
	Name="sqlite3"
	>
	<UserMacro
		Name="SQLITE_MANIFEST_VERSION"
		Value="3.8.2"
		PerformEnvironmentSet="true"
	/>
	<UserMacro
		Name="SQLITE_RC_VERSION"
		Value="3,8,2"
		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_STAT4=1;SQLITE_ENABLE_FTS3=1;SQLITE_ENABLE_LOAD_EXTENSION=1;SQLITE_ENABLE_RTREE=1;SQLITE_SOUNDEX=1;SQLITE_ENABLE_MEMORY_MANAGEMENT=1"
		PerformEnvironmentSet="true"
	/>

<VisualStudioPropertySheet
	ProjectType="Visual C++"
	Version="8.00"
	Name="sqlite3"
	>
	<UserMacro
		Name="SQLITE_MANIFEST_VERSION"
		Value="3.8.3"
		PerformEnvironmentSet="true"
	/>
	<UserMacro
		Name="SQLITE_RC_VERSION"
		Value="3,8,3"
		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_STAT4=1;SQLITE_ENABLE_FTS3=1;SQLITE_ENABLE_LOAD_EXTENSION=1;SQLITE_ENABLE_RTREE=1;SQLITE_SOUNDEX=1;SQLITE_ENABLE_MEMORY_MANAGEMENT=1"
		PerformEnvironmentSet="true"
	/>

/******************************************************************************
** This file is an amalgamation of many separate C source files from SQLite
** version 3.8.2.  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
................................................................................
** 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        "3.8.2"
#define SQLITE_VERSION_NUMBER 3008002
#define SQLITE_SOURCE_ID      "2014-01-15 00:24:22 c697d2f83c2d8ea0a100b84b0debb6a322c3a876"

/*
** 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_CANTOPEN_ISDIR          (SQLITE_CANTOPEN | (2<<8))
#define SQLITE_CANTOPEN_FULLPATH       (SQLITE_CANTOPEN | (3<<8))
#define SQLITE_CANTOPEN_CONVPATH       (SQLITE_CANTOPEN | (4<<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_ABORT_ROLLBACK          (SQLITE_ABORT | (2<<8))
#define SQLITE_CONSTRAINT_CHECK        (SQLITE_CONSTRAINT | (1<<8))
#define SQLITE_CONSTRAINT_COMMITHOOK   (SQLITE_CONSTRAINT | (2<<8))
#define SQLITE_CONSTRAINT_FOREIGNKEY   (SQLITE_CONSTRAINT | (3<<8))
#define SQLITE_CONSTRAINT_FUNCTION     (SQLITE_CONSTRAINT | (4<<8))
#define SQLITE_CONSTRAINT_NOTNULL      (SQLITE_CONSTRAINT | (5<<8))
#define SQLITE_CONSTRAINT_PRIMARYKEY   (SQLITE_CONSTRAINT | (6<<8))
................................................................................
** first then the size of the file is extended, never the other
** way around.  The SQLITE_IOCAP_SEQUENTIAL property means that
** information is written to disk in the same order as calls
** to xWrite().  The SQLITE_IOCAP_POWERSAFE_OVERWRITE property means that
** after reboot following a crash or power loss, the only bytes in a
** file that were written at the application level might have changed
** and that adjacent bytes, even bytes within the same sector are
** guaranteed to be unchanged.

*/
#define SQLITE_IOCAP_ATOMIC                 0x00000001
#define SQLITE_IOCAP_ATOMIC512              0x00000002
#define SQLITE_IOCAP_ATOMIC1K               0x00000004
#define SQLITE_IOCAP_ATOMIC2K               0x00000008
#define SQLITE_IOCAP_ATOMIC4K               0x00000010
#define SQLITE_IOCAP_ATOMIC8K               0x00000020
................................................................................
** <li>[[SQLITE_FCNTL_FILE_POINTER]]
** The [SQLITE_FCNTL_FILE_POINTER] opcode is used to obtain a pointer
** to the [sqlite3_file] object associated with a particular database
** connection.  See the [sqlite3_file_control()] documentation for
** additional information.
**
** <li>[[SQLITE_FCNTL_SYNC_OMITTED]]



** ^(The [SQLITE_FCNTL_SYNC_OMITTED] opcode is generated internally by
** SQLite and sent to all VFSes in place of a call to the xSync method
** when the database connection has [PRAGMA synchronous] set to OFF.)^
** Some specialized VFSes need this signal in order to operate correctly



** when [PRAGMA synchronous | PRAGMA synchronous=OFF] is set, but most 




** VFSes do not need this signal and should silently ignore this opcode.
** Applications should not call [sqlite3_file_control()] with this
** opcode as doing so may disrupt the operation of the specialized VFSes
** that do require it.  








**
** <li>[[SQLITE_FCNTL_WIN32_AV_RETRY]]
** ^The [SQLITE_FCNTL_WIN32_AV_RETRY] opcode is used to configure automatic
** retry counts and intervals for certain disk I/O operations for the
** windows [VFS] in order to provide robustness in the presence of
** anti-virus programs.  By default, the windows VFS will retry file read,
** file write, and file delete operations up to 10 times, with a delay
................................................................................
** The [SQLITE_FCNTL_TRACE] file control provides advisory information
** to the VFS about what the higher layers of the SQLite stack are doing.
** This file control is used by some VFS activity tracing [shims].
** The argument is a zero-terminated string.  Higher layers in the
** SQLite stack may generate instances of this file control if
** the [SQLITE_USE_FCNTL_TRACE] compile-time option is enabled.
**






** </ul>
*/
#define SQLITE_FCNTL_LOCKSTATE               1
#define SQLITE_GET_LOCKPROXYFILE             2
#define SQLITE_SET_LOCKPROXYFILE             3
#define SQLITE_LAST_ERRNO                    4
#define SQLITE_FCNTL_SIZE_HINT               5
................................................................................
#define SQLITE_FCNTL_VFSNAME                12
#define SQLITE_FCNTL_POWERSAFE_OVERWRITE    13
#define SQLITE_FCNTL_PRAGMA                 14
#define SQLITE_FCNTL_BUSYHANDLER            15
#define SQLITE_FCNTL_TEMPFILENAME           16
#define SQLITE_FCNTL_MMAP_SIZE              18
#define SQLITE_FCNTL_TRACE                  19




/*
** CAPI3REF: Mutex Handle
**
** The mutex module within SQLite defines [sqlite3_mutex] to be an
** abstract type for a mutex object.  The SQLite core never looks
** at the internal representation of an [sqlite3_mutex].  It only
................................................................................
#define SQLITE_REINDEX              27   /* Index Name      NULL            */
#define SQLITE_ANALYZE              28   /* Table Name      NULL            */
#define SQLITE_CREATE_VTABLE        29   /* Table Name      Module Name     */
#define SQLITE_DROP_VTABLE          30   /* Table Name      Module Name     */
#define SQLITE_FUNCTION             31   /* NULL            Function Name   */
#define SQLITE_SAVEPOINT            32   /* Operation       Savepoint Name  */
#define SQLITE_COPY                  0   /* No longer used */


/*
** CAPI3REF: Tracing And Profiling Functions
**
** These routines register callback functions that can be used for
** tracing and profiling the execution of SQL statements.
**
................................................................................
** aggregate may take any number of arguments between 0 and the limit
** set by [sqlite3_limit]([SQLITE_LIMIT_FUNCTION_ARG]).  If the third
** parameter is less than -1 or greater than 127 then the behavior is
** undefined.
**
** ^The fourth parameter, eTextRep, specifies what
** [SQLITE_UTF8 | text encoding] this SQL function prefers for
** its parameters.  Every SQL function implementation must be able to work
** with UTF-8, UTF-16le, or UTF-16be.  But some implementations may be
** more efficient with one encoding than another.  ^An application may
** invoke sqlite3_create_function() or sqlite3_create_function16() multiple
** times with the same function but with different values of eTextRep.



** ^When multiple implementations of the same function are available, SQLite
** will pick the one that involves the least amount of data conversion.
** If there is only a single implementation which does not care what text
** encoding is used, then the fourth argument should be [SQLITE_ANY].








**
** ^(The fifth parameter is an arbitrary pointer.  The implementation of the
** function can gain access to this pointer using [sqlite3_user_data()].)^
**
** ^The sixth, seventh and eighth parameters, xFunc, xStep and xFinal, are
** pointers to C-language functions that implement the SQL function or
** aggregate. ^A scalar SQL function requires an implementation of the xFunc
................................................................................
** These constant define integer codes that represent the various
** text encodings supported by SQLite.
*/
#define SQLITE_UTF8           1
#define SQLITE_UTF16LE        2
#define SQLITE_UTF16BE        3
#define SQLITE_UTF16          4    /* Use native byte order */
#define SQLITE_ANY            5    /* sqlite3_create_function only */
#define SQLITE_UTF16_ALIGNED  8    /* sqlite3_create_collation only */











/*
** CAPI3REF: Deprecated Functions
** DEPRECATED
**
** These functions are [deprecated].  In order to maintain
** backwards compatibility with older code, these functions continue 
** to be supported.  However, new applications should avoid
................................................................................

#endif /* _SQLITE_HASH_H_ */

/************** End of hash.h ************************************************/
/************** Continuing where we left off in sqliteInt.h ******************/
/************** Include parse.h in the middle of sqliteInt.h *****************/
/************** Begin file parse.h *******************************************/
#define TK_SEMI                            1
#define TK_EXPLAIN                         2
#define TK_QUERY                           3
#define TK_PLAN                            4
#define TK_BEGIN                           5
#define TK_TRANSACTION                     6
#define TK_DEFERRED                        7
#define TK_IMMEDIATE                       8
#define TK_EXCLUSIVE                       9
#define TK_COMMIT                         10
#define TK_END                            11
#define TK_ROLLBACK                       12
#define TK_SAVEPOINT                      13
#define TK_RELEASE                        14
#define TK_TO                             15
#define TK_TABLE                          16
#define TK_CREATE                         17
#define TK_IF                             18
#define TK_NOT                            19
#define TK_EXISTS                         20
#define TK_TEMP                           21
#define TK_LP                             22
#define TK_RP                             23
#define TK_AS                             24
#define TK_WITHOUT                        25
#define TK_COMMA                          26
#define TK_ID                             27
#define TK_INDEXED                        28
#define TK_ABORT                          29
#define TK_ACTION                         30
#define TK_AFTER                          31
#define TK_ANALYZE                        32
#define TK_ASC                            33
#define TK_ATTACH                         34
#define TK_BEFORE                         35
#define TK_BY                             36
#define TK_CASCADE                        37
#define TK_CAST                           38
#define TK_COLUMNKW                       39
#define TK_CONFLICT                       40
#define TK_DATABASE                       41
#define TK_DESC                           42
#define TK_DETACH                         43
#define TK_EACH                           44
#define TK_FAIL                           45
#define TK_FOR                            46
#define TK_IGNORE                         47
#define TK_INITIALLY                      48
#define TK_INSTEAD                        49
#define TK_LIKE_KW                        50
#define TK_MATCH                          51
#define TK_NO                             52
#define TK_KEY                            53
#define TK_OF                             54
#define TK_OFFSET                         55
#define TK_PRAGMA                         56
#define TK_RAISE                          57

#define TK_REPLACE                        58
#define TK_RESTRICT                       59
#define TK_ROW                            60
#define TK_TRIGGER                        61
#define TK_VACUUM                         62
#define TK_VIEW                           63
#define TK_VIRTUAL                        64

#define TK_REINDEX                        65
#define TK_RENAME                         66
#define TK_CTIME_KW                       67
#define TK_ANY                            68
#define TK_OR                             69
#define TK_AND                            70
#define TK_IS                             71
#define TK_BETWEEN                        72
#define TK_IN                             73
#define TK_ISNULL                         74
#define TK_NOTNULL                        75
#define TK_NE                             76
#define TK_EQ                             77
#define TK_GT                             78
#define TK_LE                             79
#define TK_LT                             80
#define TK_GE                             81
#define TK_ESCAPE                         82
#define TK_BITAND                         83
#define TK_BITOR                          84
#define TK_LSHIFT                         85
#define TK_RSHIFT                         86
#define TK_PLUS                           87
#define TK_MINUS                          88
#define TK_STAR                           89
#define TK_SLASH                          90
#define TK_REM                            91
#define TK_CONCAT                         92
#define TK_COLLATE                        93
#define TK_BITNOT                         94
#define TK_STRING                         95
#define TK_JOIN_KW                        96
#define TK_CONSTRAINT                     97
#define TK_DEFAULT                        98
#define TK_NULL                           99
#define TK_PRIMARY                        100
#define TK_UNIQUE                         101
#define TK_CHECK                          102
#define TK_REFERENCES                     103
#define TK_AUTOINCR                       104
#define TK_ON                             105
#define TK_INSERT                         106
#define TK_DELETE                         107
#define TK_UPDATE                         108
#define TK_SET                            109
#define TK_DEFERRABLE                     110
#define TK_FOREIGN                        111
#define TK_DROP                           112
#define TK_UNION                          113
#define TK_ALL                            114
#define TK_EXCEPT                         115
#define TK_INTERSECT                      116
#define TK_SELECT                         117

#define TK_DISTINCT                       118
#define TK_DOT                            119
#define TK_FROM                           120
#define TK_JOIN                           121
#define TK_USING                          122
#define TK_ORDER                          123
#define TK_GROUP                          124
#define TK_HAVING                         125
#define TK_LIMIT                          126
#define TK_WHERE                          127
#define TK_INTO                           128
#define TK_VALUES                         129
#define TK_INTEGER                        130
#define TK_FLOAT                          131
#define TK_BLOB                           132
#define TK_REGISTER                       133
#define TK_VARIABLE                       134
#define TK_CASE                           135
#define TK_WHEN                           136
#define TK_THEN                           137
#define TK_ELSE                           138
#define TK_INDEX                          139
#define TK_ALTER                          140
#define TK_ADD                            141
#define TK_TO_TEXT                        142
#define TK_TO_BLOB                        143
#define TK_TO_NUMERIC                     144
#define TK_TO_INT                         145
#define TK_TO_REAL                        146
#define TK_ISNOT                          147
#define TK_END_OF_FILE                    148
#define TK_ILLEGAL                        149
#define TK_SPACE                          150
#define TK_UNCLOSED_STRING                151
#define TK_FUNCTION                       152
#define TK_COLUMN                         153
#define TK_AGG_FUNCTION                   154
#define TK_AGG_COLUMN                     155
#define TK_UMINUS                         156
#define TK_UPLUS                          157


/************** End of parse.h ***********************************************/
/************** Continuing where we left off in sqliteInt.h ******************/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <assert.h>
................................................................................
typedef struct KeyClass KeyClass;
typedef struct KeyInfo KeyInfo;
typedef struct Lookaside Lookaside;
typedef struct LookasideSlot LookasideSlot;
typedef struct Module Module;
typedef struct NameContext NameContext;
typedef struct Parse Parse;

typedef struct RowSet RowSet;
typedef struct Savepoint Savepoint;
typedef struct Select Select;
typedef struct SelectDest SelectDest;
typedef struct SrcList SrcList;
typedef struct StrAccum StrAccum;
typedef struct Table Table;
................................................................................
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 OP_Integer        23 /* synopsis: r[P2]=P1                         */
#define OP_Int64          24 /* synopsis: r[P2]=P4                         */
#define OP_String         25 /* synopsis: r[P2]='P4' (len=P1)              */
#define OP_Null           26 /* synopsis: r[P2..P3]=NULL                   */
#define OP_Blob           27 /* synopsis: r[P2]=P4 (len=P1)                */
#define OP_Variable       28 /* synopsis: r[P2]=parameter(P1,P4)           */
#define OP_Move           29 /* synopsis: r[P2@P3]=r[P1@P3]                */
#define OP_Copy           30 /* synopsis: r[P2@P3]=r[P1@P3]                */
#define OP_SCopy          31 /* synopsis: r[P2]=r[P1]                      */
#define OP_ResultRow      32 /* synopsis: output=r[P1@P2]                  */
#define OP_CollSeq        33
#define OP_AddImm         34 /* synopsis: r[P1]=r[P1]+P2                   */
#define OP_MustBeInt      35
#define OP_RealAffinity   36
#define OP_Permutation    37
................................................................................
#define OP_ReadCookie     47
#define OP_SetCookie      48
#define OP_VerifyCookie   49
#define OP_OpenRead       50 /* synopsis: root=P2 iDb=P3                   */
#define OP_OpenWrite      51 /* synopsis: root=P2 iDb=P3                   */
#define OP_OpenAutoindex  52 /* synopsis: nColumn=P2                       */
#define OP_OpenEphemeral  53 /* synopsis: nColumn=P2                       */

#define OP_SorterOpen     54
#define OP_OpenPseudo     55 /* synopsis: content in r[P2@P3]              */
#define OP_Close          56
#define OP_SeekLt         57 /* synopsis: key=r[P3@P4]                     */
#define OP_SeekLe         58 /* synopsis: key=r[P3@P4]                     */
#define OP_SeekGe         59 /* synopsis: key=r[P3@P4]                     */
#define OP_SeekGt         60 /* synopsis: key=r[P3@P4]                     */
#define OP_Seek           61 /* synopsis: intkey=r[P2]                     */
#define OP_NoConflict     62 /* synopsis: key=r[P3@P4]                     */
#define OP_NotFound       63 /* synopsis: key=r[P3@P4]                     */
#define OP_Found          64 /* synopsis: key=r[P3@P4]                     */
#define OP_NotExists      65 /* synopsis: intkey=r[P3]                     */
#define OP_Sequence       66 /* synopsis: r[P2]=rowid                      */
#define OP_NewRowid       67 /* synopsis: r[P2]=rowid                      */
#define OP_Insert         68 /* synopsis: intkey=r[P3] data=r[P2]          */

#define OP_Or             69 /* same as TK_OR, synopsis: r[P3]=(r[P1] || r[P2]) */
#define OP_And            70 /* same as TK_AND, synopsis: r[P3]=(r[P1] && r[P2]) */
#define OP_InsertInt      71 /* synopsis: intkey=P3 data=r[P2]             */
#define OP_Delete         72
#define OP_ResetCount     73

#define OP_IsNull         74 /* same as TK_ISNULL, synopsis: if r[P1]==NULL goto P2 */
#define OP_NotNull        75 /* same as TK_NOTNULL, synopsis: if r[P1]!=NULL goto P2 */
#define OP_Ne             76 /* same as TK_NE, synopsis: if r[P1]!=r[P3] goto P2 */
#define OP_Eq             77 /* same as TK_EQ, synopsis: if r[P1]==r[P3] goto P2 */
#define OP_Gt             78 /* same as TK_GT, synopsis: if r[P1]>r[P3] goto P2 */
#define OP_Le             79 /* same as TK_LE, synopsis: if r[P1]<=r[P3] goto P2 */
#define OP_Lt             80 /* same as TK_LT, synopsis: if r[P1]<r[P3] goto P2 */
#define OP_Ge             81 /* same as TK_GE, synopsis: if r[P1]>=r[P3] goto P2 */
#define OP_SorterCompare  82 /* synopsis: if key(P1)!=rtrim(r[P3],P4) goto P2 */

#define OP_BitAnd         83 /* same as TK_BITAND, synopsis: r[P3]=r[P1]&r[P2] */
#define OP_BitOr          84 /* same as TK_BITOR, synopsis: r[P3]=r[P1]|r[P2] */
#define OP_ShiftLeft      85 /* same as TK_LSHIFT, synopsis: r[P3]=r[P2]<<r[P1] */
#define OP_ShiftRight     86 /* same as TK_RSHIFT, synopsis: r[P3]=r[P2]>>r[P1] */
#define OP_Add            87 /* same as TK_PLUS, synopsis: r[P3]=r[P1]+r[P2] */
#define OP_Subtract       88 /* same as TK_MINUS, synopsis: r[P3]=r[P2]-r[P1] */
#define OP_Multiply       89 /* same as TK_STAR, synopsis: r[P3]=r[P1]*r[P2] */
#define OP_Divide         90 /* same as TK_SLASH, synopsis: r[P3]=r[P2]/r[P1] */
#define OP_Remainder      91 /* same as TK_REM, synopsis: r[P3]=r[P2]%r[P1] */
#define OP_Concat         92 /* same as TK_CONCAT, synopsis: r[P3]=r[P2]+r[P1] */
#define OP_SorterData     93 /* synopsis: r[P2]=data                       */

#define OP_BitNot         94 /* same as TK_BITNOT, synopsis: r[P1]= ~r[P1] */
#define OP_String8        95 /* same as TK_STRING, synopsis: r[P2]='P4'    */
#define OP_RowKey         96 /* synopsis: r[P2]=key                        */
#define OP_RowData        97 /* synopsis: r[P2]=data                       */
#define OP_Rowid          98 /* synopsis: r[P2]=rowid                      */
#define OP_NullRow        99
#define OP_Last          100
#define OP_SorterSort    101
#define OP_Sort          102
#define OP_Rewind        103
#define OP_SorterInsert  104
#define OP_IdxInsert     105 /* synopsis: key=r[P2]                        */
#define OP_IdxDelete     106 /* synopsis: key=r[P2@P3]                     */
#define OP_IdxRowid      107 /* synopsis: r[P2]=rowid                      */
#define OP_IdxLT         108 /* synopsis: key=r[P3@P4]                     */
#define OP_IdxGE         109 /* synopsis: key=r[P3@P4]                     */
#define OP_Destroy       110
#define OP_Clear         111
#define OP_CreateIndex   112 /* synopsis: r[P2]=root iDb=P1                */
#define OP_CreateTable   113 /* synopsis: r[P2]=root iDb=P1                */
#define OP_ParseSchema   114
#define OP_LoadAnalysis  115
#define OP_DropTable     116
#define OP_DropIndex     117
#define OP_DropTrigger   118
#define OP_IntegrityCk   119
#define OP_RowSetAdd     120 /* synopsis: rowset(P1)=r[P2]                 */
#define OP_RowSetRead    121 /* synopsis: r[P3]=rowset(P1)                 */
#define OP_RowSetTest    122 /* synopsis: if r[P3] in rowset(P1) goto P2   */
#define OP_Program       123
#define OP_Param         124
#define OP_FkCounter     125 /* synopsis: fkctr[P1]+=P2                    */
#define OP_FkIfZero      126 /* synopsis: if fkctr[P1]==0 goto P2          */
#define OP_MemMax        127 /* synopsis: r[P1]=max(r[P1],r[P2])           */
#define OP_IfPos         128 /* synopsis: if r[P1]>0 goto P2               */
#define OP_IfNeg         129 /* synopsis: if r[P1]<0 goto P2               */
#define OP_IfZero        130 /* synopsis: r[P1]+=P3, if r[P1]==0 goto P2   */
#define OP_Real          131 /* same as TK_FLOAT, synopsis: r[P2]=P4       */
#define OP_AggFinal      132 /* synopsis: accum=r[P1] N=P2                 */

#define OP_IncrVacuum    133
#define OP_Expire        134
#define OP_TableLock     135 /* synopsis: iDb=P1 root=P2 write=P3          */
#define OP_VBegin        136
#define OP_VCreate       137
#define OP_VDestroy      138
#define OP_VOpen         139
#define OP_VColumn       140 /* synopsis: r[P3]=vcolumn(P2)                */
#define OP_VNext         141
#define OP_ToText        142 /* same as TK_TO_TEXT                         */
#define OP_ToBlob        143 /* same as TK_TO_BLOB                         */
#define OP_ToNumeric     144 /* same as TK_TO_NUMERIC                      */
#define OP_ToInt         145 /* same as TK_TO_INT                          */
#define OP_ToReal        146 /* same as TK_TO_REAL                         */
#define OP_VRename       147
#define OP_Pagecount     148
#define OP_MaxPgcnt      149
#define OP_Trace         150
#define OP_Noop          151
#define OP_Explain       152


/* Properties such as "out2" or "jump" that are specified in
** comments following the "case" for each opcode in the vdbe.c
** are encoded into bitvectors as follows:
*/
#define OPFLG_JUMP            0x0001  /* jump:  P2 holds jmp target */
................................................................................
/*   0 */ 0x00, 0x00, 0x00, 0x00, 0x00, 0x01, 0x01, 0x01,\
/*   8 */ 0x01, 0x01, 0x00, 0x00, 0x02, 0x00, 0x01, 0x00,\
/*  16 */ 0x01, 0x01, 0x04, 0x24, 0x04, 0x10, 0x00, 0x02,\
/*  24 */ 0x02, 0x02, 0x02, 0x02, 0x02, 0x00, 0x00, 0x20,\
/*  32 */ 0x00, 0x00, 0x04, 0x05, 0x04, 0x00, 0x00, 0x01,\
/*  40 */ 0x01, 0x05, 0x05, 0x00, 0x00, 0x00, 0x02, 0x02,\
/*  48 */ 0x10, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,\
/*  56 */ 0x00, 0x11, 0x11, 0x11, 0x11, 0x08, 0x11, 0x11,\
/*  64 */ 0x11, 0x11, 0x02, 0x02, 0x00, 0x4c, 0x4c, 0x00,\
/*  72 */ 0x00, 0x00, 0x05, 0x05, 0x15, 0x15, 0x15, 0x15,\
/*  80 */ 0x15, 0x15, 0x00, 0x4c, 0x4c, 0x4c, 0x4c, 0x4c,\
/*  88 */ 0x4c, 0x4c, 0x4c, 0x4c, 0x4c, 0x00, 0x24, 0x02,\
/*  96 */ 0x00, 0x00, 0x02, 0x00, 0x01, 0x01, 0x01, 0x01,\
/* 104 */ 0x08, 0x08, 0x00, 0x02, 0x01, 0x01, 0x02, 0x00,\
/* 112 */ 0x02, 0x02, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,\
/* 120 */ 0x0c, 0x45, 0x15, 0x01, 0x02, 0x00, 0x01, 0x08,\
/* 128 */ 0x05, 0x05, 0x05, 0x02, 0x00, 0x01, 0x00, 0x00,\
/* 136 */ 0x00, 0x00, 0x00, 0x00, 0x00, 0x01, 0x04, 0x04,\
/* 144 */ 0x04, 0x04, 0x04, 0x00, 0x02, 0x02, 0x00, 0x00,\
/* 152 */ 0x00,}

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

/*
** Prototypes for the VDBE interface.  See comments on the implementation
** for a description of what each of these routines does.
*/
SQLITE_PRIVATE Vdbe *sqlite3VdbeCreate(sqlite3*);
SQLITE_PRIVATE int sqlite3VdbeAddOp0(Vdbe*,int);
SQLITE_PRIVATE int sqlite3VdbeAddOp1(Vdbe*,int,int);
SQLITE_PRIVATE int sqlite3VdbeAddOp2(Vdbe*,int,int,int);
SQLITE_PRIVATE int sqlite3VdbeAddOp3(Vdbe*,int,int,int,int);
SQLITE_PRIVATE int sqlite3VdbeAddOp4(Vdbe*,int,int,int,int,const char *zP4,int);
SQLITE_PRIVATE int sqlite3VdbeAddOp4Int(Vdbe*,int,int,int,int,int);
SQLITE_PRIVATE int sqlite3VdbeAddOpList(Vdbe*, int nOp, VdbeOpList const *aOp);
................................................................................
SQLITE_PRIVATE void sqlite3VdbeAddParseSchemaOp(Vdbe*,int,char*);
SQLITE_PRIVATE void sqlite3VdbeChangeP1(Vdbe*, u32 addr, int P1);
SQLITE_PRIVATE void sqlite3VdbeChangeP2(Vdbe*, u32 addr, int P2);
SQLITE_PRIVATE void sqlite3VdbeChangeP3(Vdbe*, u32 addr, int P3);
SQLITE_PRIVATE void sqlite3VdbeChangeP5(Vdbe*, u8 P5);
SQLITE_PRIVATE void sqlite3VdbeJumpHere(Vdbe*, int addr);
SQLITE_PRIVATE void sqlite3VdbeChangeToNoop(Vdbe*, int addr);

SQLITE_PRIVATE void sqlite3VdbeChangeP4(Vdbe*, int addr, const char *zP4, int N);
SQLITE_PRIVATE void sqlite3VdbeSetP4KeyInfo(Parse*, Index*);
SQLITE_PRIVATE void sqlite3VdbeUsesBtree(Vdbe*, int);
SQLITE_PRIVATE VdbeOp *sqlite3VdbeGetOp(Vdbe*, int);
SQLITE_PRIVATE int sqlite3VdbeMakeLabel(Vdbe*);
SQLITE_PRIVATE void sqlite3VdbeRunOnlyOnce(Vdbe*);
SQLITE_PRIVATE void sqlite3VdbeDelete(Vdbe*);
................................................................................

/* Functions used to obtain and release page references. */ 
SQLITE_PRIVATE int sqlite3PagerAcquire(Pager *pPager, Pgno pgno, DbPage **ppPage, int clrFlag);
#define sqlite3PagerGet(A,B,C) sqlite3PagerAcquire(A,B,C,0)
SQLITE_PRIVATE DbPage *sqlite3PagerLookup(Pager *pPager, Pgno pgno);
SQLITE_PRIVATE void sqlite3PagerRef(DbPage*);
SQLITE_PRIVATE void sqlite3PagerUnref(DbPage*);


/* Operations on page references. */
SQLITE_PRIVATE int sqlite3PagerWrite(DbPage*);
SQLITE_PRIVATE void sqlite3PagerDontWrite(DbPage*);
SQLITE_PRIVATE int sqlite3PagerMovepage(Pager*,DbPage*,Pgno,int);
SQLITE_PRIVATE int sqlite3PagerPageRefcount(DbPage*);
SQLITE_PRIVATE void *sqlite3PagerGetData(DbPage *); 
................................................................................
SQLITE_PRIVATE void *sqlite3PagerGetExtra(DbPage *); 

/* Functions used to manage pager transactions and savepoints. */
SQLITE_PRIVATE void sqlite3PagerPagecount(Pager*, int*);
SQLITE_PRIVATE int sqlite3PagerBegin(Pager*, int exFlag, int);
SQLITE_PRIVATE int sqlite3PagerCommitPhaseOne(Pager*,const char *zMaster, int);
SQLITE_PRIVATE int sqlite3PagerExclusiveLock(Pager*);
SQLITE_PRIVATE int sqlite3PagerSync(Pager *pPager);
SQLITE_PRIVATE int sqlite3PagerCommitPhaseTwo(Pager*);
SQLITE_PRIVATE int sqlite3PagerRollback(Pager*);
SQLITE_PRIVATE int sqlite3PagerOpenSavepoint(Pager *pPager, int n);
SQLITE_PRIVATE int sqlite3PagerSavepoint(Pager *pPager, int op, int iSavepoint);
SQLITE_PRIVATE int sqlite3PagerSharedLock(Pager *pPager);

#ifndef SQLITE_OMIT_WAL
................................................................................
** sqlite3_test_control(SQLITE_TESTCTRL_OPTIMIZATIONS,...) interface to
** selectively disable various optimizations.
*/
#define SQLITE_QueryFlattener 0x0001   /* Query flattening */
#define SQLITE_ColumnCache    0x0002   /* Column cache */
#define SQLITE_GroupByOrder   0x0004   /* GROUPBY cover of ORDERBY */
#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 */
................................................................................
#endif
  Trigger *pTrigger;   /* List of triggers stored in pSchema */
  Schema *pSchema;     /* Schema that contains this table */
  Table *pNextZombie;  /* Next on the Parse.pZombieTab list */
};

/*
** Allowed values for Tabe.tabFlags.
*/
#define TF_Readonly        0x01    /* Read-only system table */
#define TF_Ephemeral       0x02    /* An ephemeral table */
#define TF_HasPrimaryKey   0x04    /* Table has a primary key */
#define TF_Autoincrement   0x08    /* Integer primary key is autoincrement */
#define TF_Virtual         0x10    /* Is a virtual table */
#define TF_WithoutRowid    0x20    /* No rowid used. PRIMARY KEY is the key */



/*
** Test to see whether or not a table is a virtual table.  This is
** done as a macro so that it will be optimized out when virtual
** table support is omitted from the build.
*/
................................................................................
  u8 directMode;          /* Direct rendering mode means take data directly
                          ** from source tables rather than from accumulators */
  u8 useSortingIdx;       /* In direct mode, reference the sorting index rather
                          ** than the source table */
  int sortingIdx;         /* Cursor number of the sorting index */
  int sortingIdxPTab;     /* Cursor number of pseudo-table */
  int nSortingColumn;     /* Number of columns in the sorting index */

  ExprList *pGroupBy;     /* The group by clause */
  struct AggInfo_col {    /* For each column used in source tables */
    Table *pTab;             /* Source table */
    int iTable;              /* Cursor number of the source table */
    int iColumn;             /* Column number within the source table */
    int iSorterColumn;       /* Column number in the sorting index */
    int iMem;                /* Memory location that acts as accumulator */
................................................................................
    Select *pSelect;  /* A SELECT statement used in place of a table name */
    int addrFillSub;  /* Address of subroutine to manifest a subquery */
    int regReturn;    /* Register holding return address of addrFillSub */
    u8 jointype;      /* Type of join between this able and the previous */
    unsigned notIndexed :1;    /* True if there is a NOT INDEXED clause */
    unsigned isCorrelated :1;  /* True if sub-query is correlated */
    unsigned viaCoroutine :1;  /* Implemented as a co-routine */

#ifndef SQLITE_OMIT_EXPLAIN
    u8 iSelectId;     /* If pSelect!=0, the id of the sub-select in EQP */
#endif
    int iCursor;      /* The VDBE cursor number used to access this table */
    Expr *pOn;        /* The ON clause of a join */
    IdList *pUsing;   /* The USING clause of a join */
    Bitmask colUsed;  /* Bit N (1<<N) set if column N of pTab is used */
................................................................................
  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 */
  Select *pRightmost;    /* Right-most select in a compound select statement */
  Expr *pLimit;          /* LIMIT expression. NULL means not used. */
  Expr *pOffset;         /* OFFSET expression. NULL means not used. */

};

/*
** Allowed values for Select.selFlags.  The "SF" prefix stands for
** "Select Flag".
*/
#define SF_Distinct        0x0001  /* Output should be DISTINCT */
................................................................................
#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 */
................................................................................

#define SRT_Output       5  /* Output each row of result */
#define SRT_Mem          6  /* Store result in a memory cell */
#define SRT_Set          7  /* Store results as keys in an index */
#define SRT_Table        8  /* Store result as data with an automatic rowid */
#define SRT_EphemTab     9  /* Create transient tab and store like SRT_Table */
#define SRT_Coroutine   10  /* Generate a single row of result */


/*
** An instance of this object describes where to put of the results of
** a SELECT statement.
*/
struct SelectDest {
  u8 eDest;         /* How to dispose of the results.  On of SRT_* above. */
................................................................................
  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 */
................................................................................
  Token sLastToken;         /* The last token parsed */
#ifndef SQLITE_OMIT_VIRTUALTABLE
  Token sArg;               /* Complete text of a module argument */
  Table **apVtabLock;       /* Pointer to virtual tables needing locking */
#endif
  Table *pZombieTab;        /* List of Table objects to delete after code gen */
  TriggerPrg *pTriggerPrg;  /* Linked list of coded triggers */


};

/*
** Return true if currently inside an sqlite3_declare_vtab() call.
*/
#ifdef SQLITE_OMIT_VIRTUALTABLE
  #define IN_DECLARE_VTAB 0
................................................................................
struct TriggerStep {
  u8 op;               /* One of TK_DELETE, TK_UPDATE, TK_INSERT, TK_SELECT */
  u8 orconf;           /* OE_Rollback etc. */
  Trigger *pTrig;      /* The trigger that this step is a part of */
  Select *pSelect;     /* SELECT statment or RHS of INSERT INTO .. SELECT ... */
  Token target;        /* Target table for DELETE, UPDATE, INSERT */
  Expr *pWhere;        /* The WHERE clause for DELETE or UPDATE steps */
  ExprList *pExprList; /* SET clause for UPDATE.  VALUES clause for INSERT */
  IdList *pIdList;     /* Column names for INSERT */
  TriggerStep *pNext;  /* Next in the link-list */
  TriggerStep *pLast;  /* Last element in link-list. Valid for 1st elem only */
};

/*
** The following structure contains information used by the sqliteFix...
................................................................................

/*
** Context pointer passed down through the tree-walk.
*/
struct Walker {
  int (*xExprCallback)(Walker*, Expr*);     /* Callback for expressions */
  int (*xSelectCallback)(Walker*,Select*);  /* Callback for SELECTs */

  Parse *pParse;                            /* Parser context.  */
  int walkerDepth;                          /* Number of subqueries */
  u8 bSelectDepthFirst;                     /* Do subqueries first */
  union {                                   /* Extra data for callback */
    NameContext *pNC;                          /* Naming context */
    int i;                                     /* Integer value */
    SrcList *pSrcList;                         /* FROM clause */
    struct SrcCount *pSrcCount;                /* Counting column references */
  } u;
};
................................................................................
/*
** Return code from the parse-tree walking primitives and their
** callbacks.
*/
#define WRC_Continue    0   /* Continue down into children */
#define WRC_Prune       1   /* Omit children but continue walking siblings */
#define WRC_Abort       2   /* Abandon the tree walk */
















/*
** Assuming zIn points to the first byte of a UTF-8 character,
** advance zIn to point to the first byte of the next UTF-8 character.
*/
#define SQLITE_SKIP_UTF8(zIn) {                        \
  if( (*(zIn++))>=0xc0 ){                              \
................................................................................

#ifndef SQLITE_OMIT_FLOATING_POINT
SQLITE_PRIVATE   int sqlite3IsNaN(double);
#else
# define sqlite3IsNaN(X)  0
#endif













SQLITE_PRIVATE void sqlite3VXPrintf(StrAccum*, int, const char*, va_list);
#ifndef SQLITE_OMIT_TRACE
SQLITE_PRIVATE void sqlite3XPrintf(StrAccum*, const char*, ...);
#endif
SQLITE_PRIVATE char *sqlite3MPrintf(sqlite3*,const char*, ...);
SQLITE_PRIVATE char *sqlite3VMPrintf(sqlite3*,const char*, va_list);
SQLITE_PRIVATE char *sqlite3MAppendf(sqlite3*,char*,const char*,...);
#if defined(SQLITE_TEST) || defined(SQLITE_DEBUG)
SQLITE_PRIVATE   void sqlite3DebugPrintf(const char*, ...);
#endif
#if defined(SQLITE_TEST)
................................................................................
SQLITE_PRIVATE   void sqlite3AutoincrementBegin(Parse *pParse);
SQLITE_PRIVATE   void sqlite3AutoincrementEnd(Parse *pParse);
#else
# define sqlite3AutoincrementBegin(X)
# define sqlite3AutoincrementEnd(X)
#endif
SQLITE_PRIVATE int sqlite3CodeCoroutine(Parse*, Select*, SelectDest*);
SQLITE_PRIVATE void sqlite3Insert(Parse*, SrcList*, ExprList*, Select*, IdList*, int);
SQLITE_PRIVATE void *sqlite3ArrayAllocate(sqlite3*,void*,int,int*,int*);
SQLITE_PRIVATE IdList *sqlite3IdListAppend(sqlite3*, IdList*, Token*);
SQLITE_PRIVATE int sqlite3IdListIndex(IdList*,const char*);
SQLITE_PRIVATE SrcList *sqlite3SrcListEnlarge(sqlite3*, SrcList*, int, int);
SQLITE_PRIVATE SrcList *sqlite3SrcListAppend(sqlite3*, SrcList*, Token*, Token*);
SQLITE_PRIVATE SrcList *sqlite3SrcListAppendFromTerm(Parse*, SrcList*, Token*, Token*,
                                      Token*, Select*, Expr*, IdList*);
................................................................................
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*,Trigger*,int,int,int,i16,u8,u8,u8);
SQLITE_PRIVATE void sqlite3GenerateRowIndexDelete(Parse*, Table*, int, int, int*);
SQLITE_PRIVATE int sqlite3GenerateIndexKey(Parse*, Index*, int, int, int, int*);
SQLITE_PRIVATE void sqlite3GenerateConstraintChecks(Parse*,Table*,int*,int,int,int,int,
                                     u8,u8,int,int*);
SQLITE_PRIVATE void sqlite3CompleteInsertion(Parse*,Table*,int,int,int,int*,int,int,int);
SQLITE_PRIVATE int sqlite3OpenTableAndIndices(Parse*, Table*, int, int, u8*, int*, int*);
SQLITE_PRIVATE void sqlite3BeginWriteOperation(Parse*, int, int);
SQLITE_PRIVATE void sqlite3MultiWrite(Parse*);
SQLITE_PRIVATE void sqlite3MayAbort(Parse*);
................................................................................
SQLITE_PRIVATE   void sqlite3CodeRowTrigger(Parse*, Trigger *, int, ExprList*, int, Table *,
                            int, int, int);
SQLITE_PRIVATE   void sqlite3CodeRowTriggerDirect(Parse *, Trigger *, Table *, int, int, int);
  void sqliteViewTriggers(Parse*, Table*, Expr*, int, ExprList*);
SQLITE_PRIVATE   void sqlite3DeleteTriggerStep(sqlite3*, TriggerStep*);
SQLITE_PRIVATE   TriggerStep *sqlite3TriggerSelectStep(sqlite3*,Select*);
SQLITE_PRIVATE   TriggerStep *sqlite3TriggerInsertStep(sqlite3*,Token*, IdList*,
                                        ExprList*,Select*,u8);
SQLITE_PRIVATE   TriggerStep *sqlite3TriggerUpdateStep(sqlite3*,Token*,ExprList*, Expr*, u8);
SQLITE_PRIVATE   TriggerStep *sqlite3TriggerDeleteStep(sqlite3*,Token*, Expr*);
SQLITE_PRIVATE   void sqlite3DeleteTrigger(sqlite3*, Trigger*);
SQLITE_PRIVATE   void sqlite3UnlinkAndDeleteTrigger(sqlite3*,int,const char*);
SQLITE_PRIVATE   u32 sqlite3TriggerColmask(Parse*,Trigger*,ExprList*,int,int,Table*,int);
# define sqlite3ParseToplevel(p) ((p)->pToplevel ? (p)->pToplevel : (p))
#else
................................................................................
SQLITE_PRIVATE char sqlite3ExprAffinity(Expr *pExpr);
SQLITE_PRIVATE int sqlite3Atoi64(const char*, i64*, int, u8);
SQLITE_PRIVATE void sqlite3Error(sqlite3*, int, const char*,...);
SQLITE_PRIVATE void *sqlite3HexToBlob(sqlite3*, const char *z, int n);
SQLITE_PRIVATE u8 sqlite3HexToInt(int h);
SQLITE_PRIVATE int sqlite3TwoPartName(Parse *, Token *, Token *, Token **);

#if defined(SQLITE_DEBUG) || defined(SQLITE_TEST) || \
    defined(SQLITE_DEBUG_OS_TRACE)
SQLITE_PRIVATE const char *sqlite3ErrName(int);
#endif

SQLITE_PRIVATE const char *sqlite3ErrStr(int);
SQLITE_PRIVATE int sqlite3ReadSchema(Parse *pParse);
SQLITE_PRIVATE CollSeq *sqlite3FindCollSeq(sqlite3*,u8 enc, const char*,int);
SQLITE_PRIVATE CollSeq *sqlite3LocateCollSeq(Parse *pParse, const char*zName);
................................................................................
#endif
SQLITE_PRIVATE u8 sqlite3GetBoolean(const char *z,int);

SQLITE_PRIVATE const void *sqlite3ValueText(sqlite3_value*, u8);
SQLITE_PRIVATE int sqlite3ValueBytes(sqlite3_value*, u8);
SQLITE_PRIVATE void sqlite3ValueSetStr(sqlite3_value*, int, const void *,u8, 
                        void(*)(void*));

SQLITE_PRIVATE void sqlite3ValueFree(sqlite3_value*);
SQLITE_PRIVATE sqlite3_value *sqlite3ValueNew(sqlite3 *);
SQLITE_PRIVATE char *sqlite3Utf16to8(sqlite3 *, const void*, int, u8);
SQLITE_PRIVATE int sqlite3ValueFromExpr(sqlite3 *, Expr *, u8, u8, sqlite3_value **);
SQLITE_PRIVATE void sqlite3ValueApplyAffinity(sqlite3_value *, u8, u8);
#ifndef SQLITE_AMALGAMATION
SQLITE_PRIVATE const unsigned char sqlite3OpcodeProperty[];
................................................................................
  FuncDestructor *pDestructor
);
SQLITE_PRIVATE int sqlite3ApiExit(sqlite3 *db, int);
SQLITE_PRIVATE int sqlite3OpenTempDatabase(Parse *);

SQLITE_PRIVATE void sqlite3StrAccumInit(StrAccum*, char*, int, int);
SQLITE_PRIVATE void sqlite3StrAccumAppend(StrAccum*,const char*,int);

SQLITE_PRIVATE void sqlite3AppendSpace(StrAccum*,int);
SQLITE_PRIVATE char *sqlite3StrAccumFinish(StrAccum*);
SQLITE_PRIVATE void sqlite3StrAccumReset(StrAccum*);
SQLITE_PRIVATE void sqlite3SelectDestInit(SelectDest*,int,int);
SQLITE_PRIVATE Expr *sqlite3CreateColumnExpr(sqlite3 *, SrcList *, int, int);

SQLITE_PRIVATE void sqlite3BackupRestart(sqlite3_backup *);
................................................................................
SQLITE_PRIVATE CollSeq *sqlite3BinaryCompareCollSeq(Parse *, Expr *, Expr *);
SQLITE_PRIVATE int sqlite3TempInMemory(const sqlite3*);
SQLITE_PRIVATE const char *sqlite3JournalModename(int);
#ifndef SQLITE_OMIT_WAL
SQLITE_PRIVATE   int sqlite3Checkpoint(sqlite3*, int, int, int*, int*);
SQLITE_PRIVATE   int sqlite3WalDefaultHook(void*,sqlite3*,const char*,int);
#endif









/* Declarations for functions in fkey.c. All of these are replaced by
** no-op macros if OMIT_FOREIGN_KEY is defined. In this case no foreign
** key functionality is available. If OMIT_TRIGGER is defined but
** OMIT_FOREIGN_KEY is not, only some of the functions are no-oped. In
** this case foreign keys are parsed, but no other functionality is 
** provided (enforcement of FK constraints requires the triggers sub-system).
................................................................................
struct Vdbe {
  sqlite3 *db;            /* The database connection that owns this statement */
  Op *aOp;                /* Space to hold the virtual machine's program */
  Mem *aMem;              /* The memory locations */
  Mem **apArg;            /* Arguments to currently executing user function */
  Mem *aColName;          /* Column names to return */
  Mem *pResultSet;        /* Pointer to an array of results */

  int nMem;               /* Number of memory locations currently allocated */
  int nOp;                /* Number of instructions in the program */
  int nOpAlloc;           /* Number of slots allocated for aOp[] */
  int nLabel;             /* Number of labels used */
  int *aLabel;            /* Space to hold the labels */
  u16 nResColumn;         /* Number of columns in one row of the result set */
  int nCursor;            /* Number of slots in apCsr[] */
  u32 magic;              /* Magic number for sanity checking */
  char *zErrMsg;          /* Error message written here */
  Vdbe *pPrev,*pNext;     /* Linked list of VDBEs with the same Vdbe.db */
  VdbeCursor **apCsr;     /* One element of this array for each open cursor */
  Mem *aVar;              /* Values for the OP_Variable opcode. */
  char **azVar;           /* Name of variables */
  ynVar nVar;             /* Number of entries in aVar[] */
  ynVar nzVar;            /* Number of entries in azVar[] */
  u32 cacheCtr;           /* VdbeCursor row cache generation counter */
  int pc;                 /* The program counter */
  int rc;                 /* Value to return */

  u8 errorAction;         /* Recovery action to do in case of an error */
  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 */
................................................................................
void sqliteVdbePopStack(Vdbe*,int);
SQLITE_PRIVATE int sqlite3VdbeCursorMoveto(VdbeCursor*);
#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*);
................................................................................
** and we need to know about the failures.  Use sqlite3OsFileControlHint()
** when simply tossing information over the wall to the VFS and we do not
** really care if the VFS receives and understands the information since it
** is only a hint and can be safely ignored.  The sqlite3OsFileControlHint()
** routine has no return value since the return value would be meaningless.
*/
SQLITE_PRIVATE int sqlite3OsFileControl(sqlite3_file *id, int op, void *pArg){












  DO_OS_MALLOC_TEST(id);


  return id->pMethods->xFileControl(id, op, pArg);
}
SQLITE_PRIVATE void sqlite3OsFileControlHint(sqlite3_file *id, int op, void *pArg){
  (void)id->pMethods->xFileControl(id, op, pArg);
}

SQLITE_PRIVATE int sqlite3OsSectorSize(sqlite3_file *id){
................................................................................
}

/*
** TRUE if p is a lookaside memory allocation from db
*/
#ifndef SQLITE_OMIT_LOOKASIDE
static int isLookaside(sqlite3 *db, void *p){
  return p && p>=db->lookaside.pStart && p<db->lookaside.pEnd;
}
#else
#define isLookaside(A,B) 0
#endif

/*
** Return the size of a memory allocation previously obtained from
................................................................................
*/
SQLITE_PRIVATE int sqlite3MallocSize(void *p){
  assert( sqlite3MemdebugHasType(p, MEMTYPE_HEAP) );
  assert( sqlite3MemdebugNoType(p, MEMTYPE_DB) );
  return sqlite3GlobalConfig.m.xSize(p);
}
SQLITE_PRIVATE int sqlite3DbMallocSize(sqlite3 *db, void *p){

  assert( db==0 || sqlite3_mutex_held(db->mutex) );
  if( db && isLookaside(db, p) ){
    return db->lookaside.sz;
  }else{
    assert( sqlite3MemdebugHasType(p, MEMTYPE_DB) );
    assert( sqlite3MemdebugHasType(p, MEMTYPE_LOOKASIDE|MEMTYPE_HEAP) );
    assert( db!=0 || sqlite3MemdebugNoType(p, MEMTYPE_LOOKASIDE) );
    return sqlite3GlobalConfig.m.xSize(p);
  }
................................................................................
    sqlite3StrAccumAppend(pAccum, zSpaces, sizeof(zSpaces)-1);
    N -= sizeof(zSpaces)-1;
  }
  if( N>0 ){
    sqlite3StrAccumAppend(pAccum, zSpaces, N);
  }
}


























/*
** On machines with a small stack size, you can redefine the
** SQLITE_PRINT_BUF_SIZE to be something smaller, if desired.
*/
#ifndef SQLITE_PRINT_BUF_SIZE
# define SQLITE_PRINT_BUF_SIZE 70
................................................................................
#endif
#define etBUFSIZE SQLITE_PRINT_BUF_SIZE  /* Size of the output buffer */

/*
** Render a string given by "fmt" into the StrAccum object.
*/
SQLITE_PRIVATE void sqlite3VXPrintf(
  StrAccum *pAccum,                  /* Accumulate results here */
  int useExtended,                   /* Allow extended %-conversions */
  const char *fmt,                   /* Format string */
  va_list ap                         /* arguments */
){
  int c;                     /* Next character in the format string */
  char *bufpt;               /* Pointer to the conversion buffer */
  int precision;             /* Precision of the current field */
  int length;                /* Length of the field */
  int idx;                   /* A general purpose loop counter */
  int width;                 /* Width of the current field */
................................................................................
  etByte flag_alternateform; /* True if "#" flag is present */
  etByte flag_altform2;      /* True if "!" flag is present */
  etByte flag_zeropad;       /* True if field width constant starts with zero */
  etByte flag_long;          /* True if "l" flag is present */
  etByte flag_longlong;      /* True if the "ll" flag is present */
  etByte done;               /* Loop termination flag */
  etByte xtype = 0;          /* Conversion paradigm */


  char prefix;               /* Prefix character.  "+" or "-" or " " or '\0'. */
  sqlite_uint64 longvalue;   /* Value for integer types */
  LONGDOUBLE_TYPE realvalue; /* Value for real types */
  const et_info *infop;      /* Pointer to the appropriate info structure */
  char *zOut;                /* Rendering buffer */
  int nOut;                  /* Size of the rendering buffer */
  char *zExtra;              /* Malloced memory used by some conversion */
................................................................................
#ifndef SQLITE_OMIT_FLOATING_POINT
  int  exp, e2;              /* exponent of real numbers */
  int nsd;                   /* Number of significant digits returned */
  double rounder;            /* Used for rounding floating point values */
  etByte flag_dp;            /* True if decimal point should be shown */
  etByte flag_rtz;           /* True if trailing zeros should be removed */
#endif

  char buf[etBUFSIZE];       /* Conversion buffer */

  bufpt = 0;








  for(; (c=(*fmt))!=0; ++fmt){
    if( c!='%' ){
      int amt;
      bufpt = (char *)fmt;
      amt = 1;
      while( (c=(*++fmt))!='%' && c!=0 ) amt++;
      sqlite3StrAccumAppend(pAccum, bufpt, amt);
................................................................................
        case '0':   flag_zeropad = 1;         break;
        default:    done = 1;                 break;
      }
    }while( !done && (c=(*++fmt))!=0 );
    /* Get the field width */
    width = 0;
    if( c=='*' ){



      width = va_arg(ap,int);

      if( width<0 ){
        flag_leftjustify = 1;
        width = -width;
      }
      c = *++fmt;
    }else{
      while( c>='0' && c<='9' ){
................................................................................
      }
    }
    /* Get the precision */
    if( c=='.' ){
      precision = 0;
      c = *++fmt;
      if( c=='*' ){



        precision = va_arg(ap,int);

        if( precision<0 ) precision = -precision;
        c = *++fmt;
      }else{
        while( c>='0' && c<='9' ){
          precision = precision*10 + c - '0';
          c = *++fmt;
        }
................................................................................
    }
    /* Fetch the info entry for the field */
    infop = &fmtinfo[0];
    xtype = etINVALID;
    for(idx=0; idx<ArraySize(fmtinfo); idx++){
      if( c==fmtinfo[idx].fmttype ){
        infop = &fmtinfo[idx];
        if( useExtended || (infop->flags & FLAG_INTERN)==0 ){
          xtype = infop->type;
        }else{
          return;
        }
        break;
      }
    }
................................................................................
        flag_longlong = sizeof(char*)==sizeof(i64);
        flag_long = sizeof(char*)==sizeof(long int);
        /* Fall through into the next case */
      case etORDINAL:
      case etRADIX:
        if( infop->flags & FLAG_SIGNED ){
          i64 v;


          if( flag_longlong ){
            v = va_arg(ap,i64);
          }else if( flag_long ){
            v = va_arg(ap,long int);
          }else{
            v = va_arg(ap,int);
          }
          if( v<0 ){
................................................................................
          }else{
            longvalue = v;
            if( flag_plussign )        prefix = '+';
            else if( flag_blanksign )  prefix = ' ';
            else                       prefix = 0;
          }
        }else{


          if( flag_longlong ){
            longvalue = va_arg(ap,u64);
          }else if( flag_long ){
            longvalue = va_arg(ap,unsigned long int);
          }else{
            longvalue = va_arg(ap,unsigned int);
          }
          prefix = 0;
................................................................................
        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);
................................................................................
          for(; (x=(*pre))!=0; pre++) *(--bufpt) = x;
        }
        length = (int)(&zOut[nOut-1]-bufpt);
        break;
      case etFLOAT:
      case etEXP:
      case etGENERIC:



        realvalue = va_arg(ap,double);

#ifdef SQLITE_OMIT_FLOATING_POINT
        length = 0;
#else
        if( precision<0 ) precision = 6;         /* Set default precision */
        if( realvalue<0.0 ){
          realvalue = -realvalue;
          prefix = '-';
................................................................................
          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 */
................................................................................
          i = prefix!=0;
          while( nPad-- ) bufpt[i++] = '0';
          length = width;
        }
#endif /* !defined(SQLITE_OMIT_FLOATING_POINT) */
        break;
      case etSIZE:

        *(va_arg(ap,int*)) = pAccum->nChar;

        length = width = 0;
        break;
      case etPERCENT:
        buf[0] = '%';
        bufpt = buf;
        length = 1;
        break;
      case etCHARX:




        c = va_arg(ap,int);

        buf[0] = (char)c;
        if( precision>=0 ){
          for(idx=1; idx<precision; idx++) buf[idx] = (char)c;
          length = precision;
        }else{
          length =1;
        }
        bufpt = buf;
        break;
      case etSTRING:
      case etDYNSTRING:



        bufpt = va_arg(ap,char*);

        if( bufpt==0 ){
          bufpt = "";
        }else if( xtype==etDYNSTRING ){
          zExtra = bufpt;
        }
        if( precision>=0 ){
          for(length=0; length<precision && bufpt[length]; length++){}
        }else{
          length = sqlite3Strlen30(bufpt);
        }
................................................................................
      case etSQLESCAPE:
      case etSQLESCAPE2:
      case etSQLESCAPE3: {
        int i, j, k, n, isnull;
        int needQuote;
        char ch;
        char q = ((xtype==etSQLESCAPE3)?'"':'\'');   /* Quote character */





        char *escarg = va_arg(ap,char*);

        isnull = escarg==0;
        if( isnull ) escarg = (xtype==etSQLESCAPE2 ? "NULL" : "(NULL)");
        k = precision;
        for(i=n=0; k!=0 && (ch=escarg[i])!=0; i++, k--){
          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;
................................................................................
        /* The precision in %q and %Q means how many input characters to
        ** consume, not the length of the output...
        ** if( precision>=0 && precision<length ) length = precision; */
        break;
      }
      case etTOKEN: {
        Token *pToken = va_arg(ap, Token*);

        if( pToken ){
          sqlite3StrAccumAppend(pAccum, (const char*)pToken->z, pToken->n);
        }
        length = width = 0;
        break;
      }
      case etSRCLIST: {
        SrcList *pSrc = va_arg(ap, SrcList*);
        int k = va_arg(ap, int);
        struct SrcList_item *pItem = &pSrc->a[k];

        assert( k>=0 && k<pSrc->nSrc );
        if( pItem->zDatabase ){
          sqlite3StrAccumAppend(pAccum, pItem->zDatabase, -1);
          sqlite3StrAccumAppend(pAccum, ".", 1);
        }
        sqlite3StrAccumAppend(pAccum, pItem->zName, -1);
        length = width = 0;
        break;
      }
      default: {
        assert( xtype==etINVALID );
        return;
      }
................................................................................
    if( flag_leftjustify ){
      register int nspace;
      nspace = width-length;
      if( nspace>0 ){
        sqlite3AppendSpace(pAccum, nspace);
      }
    }
    sqlite3_free(zExtra);
  }/* End for loop over the format string */
} /* 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->nChar += N;
}









/*
** Finish off a string by making sure it is zero-terminated.
** Return a pointer to the resulting string.  Return a NULL
** pointer if any kind of error was encountered.
*/
SQLITE_PRIVATE char *sqlite3StrAccumFinish(StrAccum *p){
................................................................................
        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;
}

/*
................................................................................
  char *z;
  char zBase[SQLITE_PRINT_BUF_SIZE];
  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;
}

................................................................................
  va_end(ap);
  sqlite3StrAccumFinish(&acc);
  fprintf(stdout,"%s", zBuf);
  fflush(stdout);
}
#endif

#ifndef SQLITE_OMIT_TRACE
/*
** variable-argument wrapper around sqlite3VXPrintf().
*/
SQLITE_PRIVATE void sqlite3XPrintf(StrAccum *p, const char *zFormat, ...){
  va_list ap;
  va_start(ap,zFormat);
  sqlite3VXPrintf(p, 1, zFormat, ap);
  va_end(ap);
}
#endif

/************** End of printf.c **********************************************/
/************** Begin file random.c ******************************************/
/*
** 2001 September 15
**
** The author disclaims copyright to this source code.  In place of
................................................................................
** encoded in UTF-8.
**
** To clear the most recent error for sqlite handle "db", sqlite3Error
** should be called with err_code set to SQLITE_OK and zFormat set
** to NULL.
*/
SQLITE_PRIVATE void sqlite3Error(sqlite3 *db, int err_code, const char *zFormat, ...){
  if( db && (db->pErr || (db->pErr = sqlite3ValueNew(db))!=0) ){
    db->errCode = err_code;
    if( zFormat ){
      char *z;
      va_list ap;
      va_start(ap, zFormat);
      z = sqlite3VMPrintf(db, zFormat, ap);
      va_end(ap);
      sqlite3ValueSetStr(db->pErr, -1, z, SQLITE_UTF8, SQLITE_DYNAMIC);
    }else{
      sqlite3ValueSetStr(db->pErr, 0, 0, SQLITE_UTF8, SQLITE_STATIC);
    }
  }
}

/*
** Add an error message to pParse->zErrMsg and increment pParse->nErr.
** The following formatting characters are allowed:
**
................................................................................
     /*  23 */ "Integer"          OpHelp("r[P2]=P1"),
     /*  24 */ "Int64"            OpHelp("r[P2]=P4"),
     /*  25 */ "String"           OpHelp("r[P2]='P4' (len=P1)"),
     /*  26 */ "Null"             OpHelp("r[P2..P3]=NULL"),
     /*  27 */ "Blob"             OpHelp("r[P2]=P4 (len=P1)"),
     /*  28 */ "Variable"         OpHelp("r[P2]=parameter(P1,P4)"),
     /*  29 */ "Move"             OpHelp("r[P2@P3]=r[P1@P3]"),
     /*  30 */ "Copy"             OpHelp("r[P2@P3]=r[P1@P3]"),
     /*  31 */ "SCopy"            OpHelp("r[P2]=r[P1]"),
     /*  32 */ "ResultRow"        OpHelp("output=r[P1@P2]"),
     /*  33 */ "CollSeq"          OpHelp(""),
     /*  34 */ "AddImm"           OpHelp("r[P1]=r[P1]+P2"),
     /*  35 */ "MustBeInt"        OpHelp(""),
     /*  36 */ "RealAffinity"     OpHelp(""),
     /*  37 */ "Permutation"      OpHelp(""),
................................................................................
     /*  47 */ "ReadCookie"       OpHelp(""),
     /*  48 */ "SetCookie"        OpHelp(""),
     /*  49 */ "VerifyCookie"     OpHelp(""),
     /*  50 */ "OpenRead"         OpHelp("root=P2 iDb=P3"),
     /*  51 */ "OpenWrite"        OpHelp("root=P2 iDb=P3"),
     /*  52 */ "OpenAutoindex"    OpHelp("nColumn=P2"),
     /*  53 */ "OpenEphemeral"    OpHelp("nColumn=P2"),

     /*  54 */ "SorterOpen"       OpHelp(""),
     /*  55 */ "OpenPseudo"       OpHelp("content in r[P2@P3]"),
     /*  56 */ "Close"            OpHelp(""),
     /*  57 */ "SeekLt"           OpHelp("key=r[P3@P4]"),
     /*  58 */ "SeekLe"           OpHelp("key=r[P3@P4]"),
     /*  59 */ "SeekGe"           OpHelp("key=r[P3@P4]"),
     /*  60 */ "SeekGt"           OpHelp("key=r[P3@P4]"),
     /*  61 */ "Seek"             OpHelp("intkey=r[P2]"),
     /*  62 */ "NoConflict"       OpHelp("key=r[P3@P4]"),
     /*  63 */ "NotFound"         OpHelp("key=r[P3@P4]"),
     /*  64 */ "Found"            OpHelp("key=r[P3@P4]"),
     /*  65 */ "NotExists"        OpHelp("intkey=r[P3]"),
     /*  66 */ "Sequence"         OpHelp("r[P2]=rowid"),
     /*  67 */ "NewRowid"         OpHelp("r[P2]=rowid"),
     /*  68 */ "Insert"           OpHelp("intkey=r[P3] data=r[P2]"),

     /*  69 */ "Or"               OpHelp("r[P3]=(r[P1] || r[P2])"),
     /*  70 */ "And"              OpHelp("r[P3]=(r[P1] && r[P2])"),
     /*  71 */ "InsertInt"        OpHelp("intkey=P3 data=r[P2]"),
     /*  72 */ "Delete"           OpHelp(""),
     /*  73 */ "ResetCount"       OpHelp(""),

     /*  74 */ "IsNull"           OpHelp("if r[P1]==NULL goto P2"),
     /*  75 */ "NotNull"          OpHelp("if r[P1]!=NULL goto P2"),
     /*  76 */ "Ne"               OpHelp("if r[P1]!=r[P3] goto P2"),
     /*  77 */ "Eq"               OpHelp("if r[P1]==r[P3] goto P2"),
     /*  78 */ "Gt"               OpHelp("if r[P1]>r[P3] goto P2"),
     /*  79 */ "Le"               OpHelp("if r[P1]<=r[P3] goto P2"),
     /*  80 */ "Lt"               OpHelp("if r[P1]<r[P3] goto P2"),
     /*  81 */ "Ge"               OpHelp("if r[P1]>=r[P3] goto P2"),
     /*  82 */ "SorterCompare"    OpHelp("if key(P1)!=rtrim(r[P3],P4) goto P2"),

     /*  83 */ "BitAnd"           OpHelp("r[P3]=r[P1]&r[P2]"),
     /*  84 */ "BitOr"            OpHelp("r[P3]=r[P1]|r[P2]"),
     /*  85 */ "ShiftLeft"        OpHelp("r[P3]=r[P2]<<r[P1]"),
     /*  86 */ "ShiftRight"       OpHelp("r[P3]=r[P2]>>r[P1]"),
     /*  87 */ "Add"              OpHelp("r[P3]=r[P1]+r[P2]"),
     /*  88 */ "Subtract"         OpHelp("r[P3]=r[P2]-r[P1]"),
     /*  89 */ "Multiply"         OpHelp("r[P3]=r[P1]*r[P2]"),
     /*  90 */ "Divide"           OpHelp("r[P3]=r[P2]/r[P1]"),
     /*  91 */ "Remainder"        OpHelp("r[P3]=r[P2]%r[P1]"),
     /*  92 */ "Concat"           OpHelp("r[P3]=r[P2]+r[P1]"),
     /*  93 */ "SorterData"       OpHelp("r[P2]=data"),

     /*  94 */ "BitNot"           OpHelp("r[P1]= ~r[P1]"),
     /*  95 */ "String8"          OpHelp("r[P2]='P4'"),
     /*  96 */ "RowKey"           OpHelp("r[P2]=key"),
     /*  97 */ "RowData"          OpHelp("r[P2]=data"),
     /*  98 */ "Rowid"            OpHelp("r[P2]=rowid"),
     /*  99 */ "NullRow"          OpHelp(""),
     /* 100 */ "Last"             OpHelp(""),
     /* 101 */ "SorterSort"       OpHelp(""),
     /* 102 */ "Sort"             OpHelp(""),
     /* 103 */ "Rewind"           OpHelp(""),
     /* 104 */ "SorterInsert"     OpHelp(""),
     /* 105 */ "IdxInsert"        OpHelp("key=r[P2]"),
     /* 106 */ "IdxDelete"        OpHelp("key=r[P2@P3]"),
     /* 107 */ "IdxRowid"         OpHelp("r[P2]=rowid"),
     /* 108 */ "IdxLT"            OpHelp("key=r[P3@P4]"),
     /* 109 */ "IdxGE"            OpHelp("key=r[P3@P4]"),
     /* 110 */ "Destroy"          OpHelp(""),
     /* 111 */ "Clear"            OpHelp(""),
     /* 112 */ "CreateIndex"      OpHelp("r[P2]=root iDb=P1"),
     /* 113 */ "CreateTable"      OpHelp("r[P2]=root iDb=P1"),
     /* 114 */ "ParseSchema"      OpHelp(""),
     /* 115 */ "LoadAnalysis"     OpHelp(""),
     /* 116 */ "DropTable"        OpHelp(""),
     /* 117 */ "DropIndex"        OpHelp(""),
     /* 118 */ "DropTrigger"      OpHelp(""),
     /* 119 */ "IntegrityCk"      OpHelp(""),
     /* 120 */ "RowSetAdd"        OpHelp("rowset(P1)=r[P2]"),
     /* 121 */ "RowSetRead"       OpHelp("r[P3]=rowset(P1)"),
     /* 122 */ "RowSetTest"       OpHelp("if r[P3] in rowset(P1) goto P2"),
     /* 123 */ "Program"          OpHelp(""),
     /* 124 */ "Param"            OpHelp(""),
     /* 125 */ "FkCounter"        OpHelp("fkctr[P1]+=P2"),
     /* 126 */ "FkIfZero"         OpHelp("if fkctr[P1]==0 goto P2"),
     /* 127 */ "MemMax"           OpHelp("r[P1]=max(r[P1],r[P2])"),
     /* 128 */ "IfPos"            OpHelp("if r[P1]>0 goto P2"),
     /* 129 */ "IfNeg"            OpHelp("if r[P1]<0 goto P2"),
     /* 130 */ "IfZero"           OpHelp("r[P1]+=P3, if r[P1]==0 goto P2"),
     /* 131 */ "Real"             OpHelp("r[P2]=P4"),
     /* 132 */ "AggFinal"         OpHelp("accum=r[P1] N=P2"),

     /* 133 */ "IncrVacuum"       OpHelp(""),
     /* 134 */ "Expire"           OpHelp(""),
     /* 135 */ "TableLock"        OpHelp("iDb=P1 root=P2 write=P3"),
     /* 136 */ "VBegin"           OpHelp(""),
     /* 137 */ "VCreate"          OpHelp(""),
     /* 138 */ "VDestroy"         OpHelp(""),
     /* 139 */ "VOpen"            OpHelp(""),
     /* 140 */ "VColumn"          OpHelp("r[P3]=vcolumn(P2)"),
     /* 141 */ "VNext"            OpHelp(""),
     /* 142 */ "ToText"           OpHelp(""),
     /* 143 */ "ToBlob"           OpHelp(""),
     /* 144 */ "ToNumeric"        OpHelp(""),
     /* 145 */ "ToInt"            OpHelp(""),
     /* 146 */ "ToReal"           OpHelp(""),
     /* 147 */ "VRename"          OpHelp(""),
     /* 148 */ "Pagecount"        OpHelp(""),
     /* 149 */ "MaxPgcnt"         OpHelp(""),
     /* 150 */ "Trace"            OpHelp(""),
     /* 151 */ "Noop"             OpHelp(""),
     /* 152 */ "Explain"          OpHelp(""),
  };
  return azName[i];
}
#endif

/************** End of opcodes.c *********************************************/
/************** Begin file os_unix.c *****************************************/
................................................................................
  }else{
    pInode->nRef++;
  }
  *ppInode = pInode;
  return SQLITE_OK;
}











/*
** Check a unixFile that is a database.  Verify the following:
**
** (1) There is exactly one hard link on the file
** (2) The file is not a symbolic link
** (3) The file has not been renamed or unlinked
................................................................................
    return;
  }
  if( buf.st_nlink>1 ){
    sqlite3_log(SQLITE_WARNING, "multiple links to file: %s", pFile->zPath);
    pFile->ctrlFlags |= UNIXFILE_WARNED;
    return;
  }
  if( pFile->pInode!=0
   && ((rc = osStat(pFile->zPath, &buf))!=0
       || buf.st_ino!=pFile->pInode->fileId.ino)
  ){
    sqlite3_log(SQLITE_WARNING, "file renamed while open: %s", pFile->zPath);
    pFile->ctrlFlags |= UNIXFILE_WARNED;
    return;
  }
}


................................................................................
    case SQLITE_FCNTL_TEMPFILENAME: {
      char *zTFile = sqlite3_malloc( pFile->pVfs->mxPathname );
      if( zTFile ){
        unixGetTempname(pFile->pVfs->mxPathname, zTFile);
        *(char**)pArg = zTFile;
      }
      return SQLITE_OK;




    }
#if SQLITE_MAX_MMAP_SIZE>0
    case SQLITE_FCNTL_MMAP_SIZE: {
      i64 newLimit = *(i64*)pArg;
      int rc = SQLITE_OK;
      if( newLimit>sqlite3GlobalConfig.mxMmap ){
        newLimit = sqlite3GlobalConfig.mxMmap;
................................................................................
** argument that was passed to the unixFetch() invocation. 
**
** Or, if the third argument is NULL, then this function is being called 
** to inform the VFS layer that, according to POSIX, any existing mapping 
** may now be invalid and should be unmapped.
*/
static int unixUnfetch(sqlite3_file *fd, i64 iOff, void *p){

  unixFile *pFd = (unixFile *)fd;   /* The underlying database file */
  UNUSED_PARAMETER(iOff);

#if SQLITE_MAX_MMAP_SIZE>0
  /* If p==0 (unmap the entire file) then there must be no outstanding 
  ** xFetch references. Or, if p!=0 (meaning it is an xFetch reference),
  ** then there must be at least one outstanding.  */
  assert( (p==0)==(pFd->nFetchOut==0) );

  /* If p!=0, it must match the iOff value. */
  assert( p==0 || p==&((u8 *)pFd->pMapRegion)[iOff] );
................................................................................
  if( p ){
    pFd->nFetchOut--;
  }else{
    unixUnmapfile(pFd);
  }

  assert( pFd->nFetchOut>=0 );




#endif
  return SQLITE_OK;
}

/*
** Here ends the implementation of all sqlite3_file methods.
**
................................................................................
** structure. Unless SQLITE_PCACHE_SEPARATE_HEADER is defined, a buffer of
** PgHdr1.pCache->szPage bytes is allocated directly before this structure 
** in memory.
*/
struct PgHdr1 {
  sqlite3_pcache_page page;
  unsigned int iKey;             /* Key value (page number) */

  PgHdr1 *pNext;                 /* Next in hash table chain */
  PCache1 *pCache;               /* Cache that currently owns this page */
  PgHdr1 *pLruNext;              /* Next in LRU list of unpinned pages */
  PgHdr1 *pLruPrev;              /* Previous in LRU list of unpinned pages */
};

/*
................................................................................

/*
** This function is used internally to remove the page pPage from the 
** PGroup LRU list, if is part of it. If pPage is not part of the PGroup
** LRU list, then this function is a no-op.
**
** The PGroup mutex must be held when this function is called.
**
** If pPage is NULL then this routine is a no-op.
*/
static void pcache1PinPage(PgHdr1 *pPage){
  PCache1 *pCache;
  PGroup *pGroup;

  if( pPage==0 ) return;

  pCache = pPage->pCache;
  pGroup = pCache->pGroup;


  assert( sqlite3_mutex_held(pGroup->mutex) );
  if( pPage->pLruNext || pPage==pGroup->pLruTail ){
    if( pPage->pLruPrev ){
      pPage->pLruPrev->pLruNext = pPage->pLruNext;


    }
    if( pPage->pLruNext ){
      pPage->pLruNext->pLruPrev = pPage->pLruPrev;
    }
    if( pGroup->pLruHead==pPage ){
      pGroup->pLruHead = pPage->pLruNext;
    }
    if( pGroup->pLruTail==pPage ){
      pGroup->pLruTail = pPage->pLruPrev;
    }
    pPage->pLruNext = 0;
    pPage->pLruPrev = 0;

    pPage->pCache->nRecyclable--;
  }
}


/*
** Remove the page supplied as an argument from the hash table 
** (PCache1.apHash structure) that it is currently stored in.
**
................................................................................
** to recycle pages to reduce the number allocated to nMaxPage.
*/
static void pcache1EnforceMaxPage(PGroup *pGroup){
  assert( sqlite3_mutex_held(pGroup->mutex) );
  while( pGroup->nCurrentPage>pGroup->nMaxPage && pGroup->pLruTail ){
    PgHdr1 *p = pGroup->pLruTail;
    assert( p->pCache->pGroup==pGroup );

    pcache1PinPage(p);
    pcache1RemoveFromHash(p);
    pcache1FreePage(p);
  }
}

/*
................................................................................
  for(h=0; h<pCache->nHash; h++){
    PgHdr1 **pp = &pCache->apHash[h]; 
    PgHdr1 *pPage;
    while( (pPage = *pp)!=0 ){
      if( pPage->iKey>=iLimit ){
        pCache->nPage--;
        *pp = pPage->pNext;
        pcache1PinPage(pPage);
        pcache1FreePage(pPage);
      }else{
        pp = &pPage->pNext;
        TESTONLY( nPage++; )
      }
    }
  }
................................................................................
  /* Step 1: Search the hash table for an existing entry. */
  if( pCache->nHash>0 ){
    unsigned int h = iKey % pCache->nHash;
    for(pPage=pCache->apHash[h]; pPage&&pPage->iKey!=iKey; pPage=pPage->pNext);
  }

  /* Step 2: Abort if no existing page is found and createFlag is 0 */
  if( pPage || createFlag==0 ){
    pcache1PinPage(pPage);



    goto fetch_out;
  }

  /* The pGroup local variable will normally be initialized by the
  ** pcache1EnterMutex() macro above.  But if SQLITE_MUTEX_OMIT is defined,
  ** then pcache1EnterMutex() is a no-op, so we have to initialize the
  ** local variable here.  Delaying the initialization of pGroup is an
................................................................................
  if( pCache->bPurgeable && pGroup->pLruTail && (
         (pCache->nPage+1>=pCache->nMax)
      || pGroup->nCurrentPage>=pGroup->nMaxPage
      || pcache1UnderMemoryPressure(pCache)
  )){
    PCache1 *pOther;
    pPage = pGroup->pLruTail;

    pcache1RemoveFromHash(pPage);
    pcache1PinPage(pPage);
    pOther = pPage->pCache;

    /* We want to verify that szPage and szExtra are the same for pOther
    ** and pCache.  Assert that we can verify this by comparing sums. */
    assert( (pCache->szPage & (pCache->szPage-1))==0 && pCache->szPage>=512 );
................................................................................
    unsigned int h = iKey % pCache->nHash;
    pCache->nPage++;
    pPage->iKey = iKey;
    pPage->pNext = pCache->apHash[h];
    pPage->pCache = pCache;
    pPage->pLruPrev = 0;
    pPage->pLruNext = 0;

    *(void **)pPage->page.pExtra = 0;
    pCache->apHash[h] = pPage;
  }

fetch_out:
  if( pPage && iKey>pCache->iMaxKey ){
    pCache->iMaxKey = iKey;
................................................................................
  pcache1EnterMutex(pGroup);

  /* It is an error to call this function if the page is already 
  ** part of the PGroup LRU list.
  */
  assert( pPage->pLruPrev==0 && pPage->pLruNext==0 );
  assert( pGroup->pLruHead!=pPage && pGroup->pLruTail!=pPage );


  if( reuseUnlikely || pGroup->nCurrentPage>pGroup->nMaxPage ){
    pcache1RemoveFromHash(pPage);
    pcache1FreePage(pPage);
  }else{
    /* Add the page to the PGroup LRU list. */
    if( pGroup->pLruHead ){
................................................................................
      pPage->pLruNext = pGroup->pLruHead;
      pGroup->pLruHead = pPage;
    }else{
      pGroup->pLruTail = pPage;
      pGroup->pLruHead = pPage;
    }
    pCache->nRecyclable++;

  }

  pcache1LeaveMutex(pCache->pGroup);
}

/*
** Implementation of the sqlite3_pcache.xRekey method. 
................................................................................
    PgHdr1 *p;
    pcache1EnterMutex(&pcache1.grp);
    while( (nReq<0 || nFree<nReq) && ((p=pcache1.grp.pLruTail)!=0) ){
      nFree += pcache1MemSize(p->page.pBuf);
#ifdef SQLITE_PCACHE_SEPARATE_HEADER
      nFree += sqlite3MemSize(p);
#endif

      pcache1PinPage(p);
      pcache1RemoveFromHash(p);
      pcache1FreePage(p);
    }
    pcache1LeaveMutex(&pcache1.grp);
  }
  return nFree;
................................................................................
  int *pnMax,          /* OUT: Global maximum cache size */
  int *pnMin,          /* OUT: Sum of PCache1.nMin for purgeable caches */
  int *pnRecyclable    /* OUT: Total number of pages available for recycling */
){
  PgHdr1 *p;
  int nRecyclable = 0;
  for(p=pcache1.grp.pLruHead; p; p=p->pLruNext){

    nRecyclable++;
  }
  *pnCurrent = pcache1.grp.nCurrentPage;
  *pnMax = (int)pcache1.grp.nMaxPage;
  *pnMin = (int)pcache1.grp.nMinPage;
  *pnRecyclable = nRecyclable;
}
................................................................................
**   * 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){
  Pager *pPager = pPg->pPager;
  PagerSavepoint *p;
  Pgno pgno;
  int i;
  if( pPager->nSavepoint ){
    pgno = pPg->pgno;
    for(i=0; i<pPager->nSavepoint; i++){
      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.
*/
static int pageInJournal(PgHdr *pPg){
  return sqlite3BitvecTest(pPg->pPager->pInJournal, pPg->pgno);
}

/*
** Read a 32-bit integer from the given file descriptor.  Store the integer
** that is read in *pRes.  Return SQLITE_OK if everything worked, or an
** error code is something goes wrong.
**
................................................................................
  unsigned char aMagic[8];   /* A buffer to hold the magic header */
  zMaster[0] = '\0';

  if( SQLITE_OK!=(rc = sqlite3OsFileSize(pJrnl, &szJ))
   || szJ<16
   || SQLITE_OK!=(rc = read32bits(pJrnl, szJ-16, &len))
   || len>=nMaster 

   || SQLITE_OK!=(rc = read32bits(pJrnl, szJ-12, &cksum))
   || SQLITE_OK!=(rc = sqlite3OsRead(pJrnl, aMagic, 8, szJ-8))
   || memcmp(aMagic, aJournalMagic, 8)
   || SQLITE_OK!=(rc = sqlite3OsRead(pJrnl, zMaster, len, szJ-16-len))
  ){
    return rc;
  }
................................................................................

#ifdef SQLITE_CHECK_PAGES
  sqlite3PcacheIterateDirty(pPager->pPCache, pager_set_pagehash);
  if( pPager->dbSize==0 && sqlite3PcacheRefCount(pPager->pPCache)>0 ){
    PgHdr *p = pager_lookup(pPager, 1);
    if( p ){
      p->pageHash = 0;
      sqlite3PagerUnref(p);
    }
  }
#endif

  sqlite3BitvecDestroy(pPager->pInJournal);
  pPager->pInJournal = 0;
  pPager->nRec = 0;
................................................................................
    ** At this point the journal has been finalized and the transaction 
    ** successfully committed, but the EXCLUSIVE lock is still held on the
    ** file. So it is safe to truncate the database file to its minimum
    ** required size.  */
    assert( pPager->eLock==EXCLUSIVE_LOCK );
    rc = pager_truncate(pPager, pPager->dbSize);
  }






  if( !pPager->exclusiveMode 
   && (!pagerUseWal(pPager) || sqlite3WalExclusiveMode(pPager->pWal, 0))
  ){
    rc2 = pagerUnlockDb(pPager, SHARED_LOCK);
    pPager->changeCountDone = 0;
  }
................................................................................
    zMaster = pPager->pTmpSpace;
    rc = readMasterJournal(pPager->jfd, zMaster, pPager->pVfs->mxPathname+1);
    testcase( rc!=SQLITE_OK );
  }
  if( rc==SQLITE_OK
   && (pPager->eState>=PAGER_WRITER_DBMOD || pPager->eState==PAGER_OPEN)
  ){
    rc = sqlite3PagerSync(pPager);
  }
  if( rc==SQLITE_OK ){
    rc = pager_end_transaction(pPager, zMaster[0]!='\0', 0);
    testcase( rc!=SQLITE_OK );
  }
  if( rc==SQLITE_OK && zMaster[0] && res ){
    /* If there was a master journal and this routine will return success,
................................................................................
      rc = sqlite3WalFindFrame(pPager->pWal, pPg->pgno, &iFrame);
      if( rc==SQLITE_OK ){
        rc = readDbPage(pPg, iFrame);
      }
      if( rc==SQLITE_OK ){
        pPager->xReiniter(pPg);
      }
      sqlite3PagerUnref(pPg);
    }
  }

  /* Normally, if a transaction is rolled back, any backup processes are
  ** updated as data is copied out of the rollback journal and into the
  ** database. This is not generally possible with a WAL database, as
  ** rollback involves simply truncating the log file. Therefore, if one
................................................................................
  if( pPager->journalMode!=PAGER_JOURNALMODE_OFF ){

    /* Open the sub-journal, if it has not already been opened */
    assert( pPager->useJournal );
    assert( isOpen(pPager->jfd) || pagerUseWal(pPager) );
    assert( isOpen(pPager->sjfd) || pPager->nSubRec==0 );
    assert( pagerUseWal(pPager) 
         || pageInJournal(pPg) 
         || pPg->pgno>pPager->dbOrigSize 
    );
    rc = openSubJournal(pPager);

    /* If the sub-journal was opened successfully (or was already open),
    ** write the journal record into the file.  */
    if( rc==SQLITE_OK ){
................................................................................
  /* memset(pPager->aHash, 0, sizeof(pPager->aHash)); */
  /* pPager->szMmap = SQLITE_DEFAULT_MMAP_SIZE // will be set by btree.c */

  *ppPager = pPager;
  return SQLITE_OK;
}



























/*
** This function is called after transitioning from PAGER_UNLOCK to
** PAGER_SHARED state. It tests if there is a hot journal present in
** the file-system for the given pager. A hot journal is one that 
** needs to be played back. According to this function, a hot-journal
................................................................................
  }else{

    if( bMmapOk && pagerUseWal(pPager) ){
      rc = sqlite3WalFindFrame(pPager->pWal, pgno, &iFrame);
      if( rc!=SQLITE_OK ) goto pager_acquire_err;
    }

    if( iFrame==0 && bMmapOk ){
      void *pData = 0;

      rc = sqlite3OsFetch(pPager->fd, 
          (i64)(pgno-1) * pPager->pageSize, pPager->pageSize, &pData
      );

      if( rc==SQLITE_OK && pData ){
................................................................................
** Release a page reference.
**
** If the number of references to the page drop to zero, then the
** page is added to the LRU list.  When all references to all pages
** are released, a rollback occurs and the lock on the database is
** removed.
*/
SQLITE_PRIVATE void sqlite3PagerUnref(DbPage *pPg){

  if( pPg ){
    Pager *pPager = pPg->pPager;
    if( pPg->flags & PGHDR_MMAP ){
      pagerReleaseMapPage(pPg);
    }else{
      sqlite3PcacheRelease(pPg);
    }
    pagerUnlockIfUnused(pPager);
  }


}

/*
** This function is called at the start of every write transaction.
** There must already be a RESERVED or EXCLUSIVE lock on the database 
** file when this routine is called.
**
................................................................................
      }else{
        const int flags =                   /* VFS flags to open journal file */
          SQLITE_OPEN_READWRITE|SQLITE_OPEN_CREATE|
          (pPager->tempFile ? 
            (SQLITE_OPEN_DELETEONCLOSE|SQLITE_OPEN_TEMP_JOURNAL):
            (SQLITE_OPEN_MAIN_JOURNAL)
          );





  #ifdef SQLITE_ENABLE_ATOMIC_WRITE
        rc = sqlite3JournalOpen(
            pVfs, pPager->zJournal, pPager->jfd, flags, jrnlBufferSize(pPager)
        );
  #else
        rc = sqlite3OsOpen(pVfs, pPager->zJournal, pPager->jfd, flags, 0);
  #endif

      }
      assert( rc!=SQLITE_OK || isOpen(pPager->jfd) );
    }
  
  
    /* Write the first journal header to the journal file and open 
    ** the sub-journal if necessary.
................................................................................
** Mark a single data page as writeable. The page is written into the 
** main journal or sub-journal as required. If the page is written into
** one of the journals, the corresponding bit is set in the 
** Pager.pInJournal bitvec and the PagerSavepoint.pInSavepoint bitvecs
** of any open savepoints as appropriate.
*/
static int pager_write(PgHdr *pPg){
  void *pData = pPg->pData;
  Pager *pPager = pPg->pPager;
  int rc = SQLITE_OK;


  /* This routine is not called unless a write-transaction has already 
  ** been started. The journal file may or may not be open at this point.
  ** It is never called in the ERROR state.
  */
  assert( pPager->eState==PAGER_WRITER_LOCKED
       || pPager->eState==PAGER_WRITER_CACHEMOD
       || pPager->eState==PAGER_WRITER_DBMOD
  );
  assert( assert_pager_state(pPager) );

  /* If an error has been previously detected, report the same error
  ** again. This should not happen, but the check provides robustness. */
  if( NEVER(pPager->errCode) )  return pPager->errCode;

  /* Higher-level routines never call this function if database is not
  ** writable.  But check anyway, just for robustness. */
  if( NEVER(pPager->readOnly) ) return SQLITE_PERM;

  CHECK_PAGE(pPg);

  /* The journal file needs to be opened. Higher level routines have already
  ** obtained the necessary locks to begin the write-transaction, but the
  ** rollback journal might not yet be open. Open it now if this is the case.
  **
................................................................................
  assert( pPager->eState>=PAGER_WRITER_CACHEMOD );
  assert( assert_pager_state(pPager) );

  /* Mark the page as dirty.  If the page has already been written
  ** to the journal then we can return right away.
  */
  sqlite3PcacheMakeDirty(pPg);
  if( pageInJournal(pPg) && !subjRequiresPage(pPg) ){

    assert( !pagerUseWal(pPager) );
  }else{
  
    /* The transaction journal now exists and we have a RESERVED or an
    ** EXCLUSIVE lock on the main database file.  Write the current page to
    ** the transaction journal if it is not there already.
    */
    if( !pageInJournal(pPg) && !pagerUseWal(pPager) ){
      assert( pagerUseWal(pPager)==0 );
      if( pPg->pgno<=pPager->dbOrigSize && isOpen(pPager->jfd) ){
        u32 cksum;
        char *pData2;
        i64 iOff = pPager->journalOff;

        /* We should never write to the journal file the page that
        ** contains the database locks.  The following assert verifies
        ** that we do not. */
        assert( pPg->pgno!=PAGER_MJ_PGNO(pPager) );

        assert( pPager->journalHdr<=pPager->journalOff );
        CODEC2(pPager, pData, pPg->pgno, 7, return SQLITE_NOMEM, pData2);
        cksum = pager_cksum(pPager, (u8*)pData2);

        /* Even if an IO or diskfull error occurs while journalling the
        ** page in the block above, set the need-sync flag for the page.
        ** Otherwise, when the transaction is rolled back, the logic in
        ** playback_one_page() will think that the page needs to be restored
        ** in the database file. And if an IO error occurs while doing so,
................................................................................
    }
  
    /* If the statement journal is open and the page is not in it,
    ** then write the current page to the statement journal.  Note that
    ** the statement journal format differs from the standard journal format
    ** in that it omits the checksums and the header.
    */
    if( subjRequiresPage(pPg) ){
      rc = subjournalPage(pPg);
    }
  }

  /* Update the database size and return.
  */
  if( pPager->dbSize<pPg->pgno ){
................................................................................
** as appropriate. Otherwise, SQLITE_OK.
*/
SQLITE_PRIVATE int sqlite3PagerWrite(DbPage *pDbPage){
  int rc = SQLITE_OK;

  PgHdr *pPg = pDbPage;
  Pager *pPager = pPg->pPager;
  Pgno nPagePerSector = (pPager->sectorSize/pPager->pageSize);

  assert( (pPg->flags & PGHDR_MMAP)==0 );
  assert( pPager->eState>=PAGER_WRITER_LOCKED );
  assert( pPager->eState!=PAGER_ERROR );
  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 doNotSpill NOSYNC bit 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->doNotSpill & SPILLFLAG_NOSYNC)==0 );
................................................................................
        if( pg!=PAGER_MJ_PGNO(pPager) ){
          rc = sqlite3PagerGet(pPager, pg, &pPage);
          if( rc==SQLITE_OK ){
            rc = pager_write(pPage);
            if( pPage->flags&PGHDR_NEED_SYNC ){
              needSync = 1;
            }
            sqlite3PagerUnref(pPage);
          }
        }
      }else if( (pPage = pager_lookup(pPager, pg))!=0 ){
        if( pPage->flags&PGHDR_NEED_SYNC ){
          needSync = 1;
        }
        sqlite3PagerUnref(pPage);
      }
    }

    /* If the PGHDR_NEED_SYNC flag is set for any of the nPage pages 
    ** starting at pg1, then it needs to be set for all of them. Because
    ** writing to any of these nPage pages may damage the others, the
    ** journal file must contain sync()ed copies of all of them
................................................................................
    */
    if( rc==SQLITE_OK && needSync ){
      assert( !MEMDB );
      for(ii=0; ii<nPage; ii++){
        PgHdr *pPage = pager_lookup(pPager, pg1+ii);
        if( pPage ){
          pPage->flags |= PGHDR_NEED_SYNC;
          sqlite3PagerUnref(pPage);
        }
      }
    }

    assert( (pPager->doNotSpill & SPILLFLAG_NOSYNC)!=0 );
    pPager->doNotSpill &= ~SPILLFLAG_NOSYNC;
  }else{
................................................................................
/*
** Sync the database file to disk. This is a no-op for in-memory databases
** or pages with the Pager.noSync flag set.
**
** If successful, or if called on a pager for which it is a no-op, this
** function returns SQLITE_OK. Otherwise, an IO error code is returned.
*/
SQLITE_PRIVATE int sqlite3PagerSync(Pager *pPager){
  int rc = SQLITE_OK;
  if( !pPager->noSync ){
    assert( !MEMDB );
    rc = sqlite3OsSync(pPager->fd, pPager->syncFlags);

  }else if( isOpen(pPager->fd) ){
    assert( !MEMDB );

    rc = sqlite3OsFileControl(pPager->fd, SQLITE_FCNTL_SYNC_OMITTED, 0);
    if( rc==SQLITE_NOTFOUND ){
      rc = SQLITE_OK;
    }



  }
  return rc;
}

/*
** This function may only be called while a write-transaction is active in
** rollback. If the connection is in WAL mode, this call is a no-op. 
................................................................................
        assert( pPager->eState==PAGER_WRITER_DBMOD );
        rc = pager_truncate(pPager, nNew);
        if( rc!=SQLITE_OK ) goto commit_phase_one_exit;
      }
  
      /* Finally, sync the database file. */
      if( !noSync ){
        rc = sqlite3PagerSync(pPager);
      }
      IOTRACE(("DBSYNC %p\n", pPager))
    }
  }

commit_phase_one_exit:
  if( rc==SQLITE_OK && !pagerUseWal(pPager) ){
................................................................................
    }
  }else{
    rc = pager_playback(pPager, 0);
  }

  assert( pPager->eState==PAGER_READER || rc!=SQLITE_OK );
  assert( rc==SQLITE_OK || rc==SQLITE_FULL || rc==SQLITE_CORRUPT
          || rc==SQLITE_NOMEM || (rc&0xFF)==SQLITE_IOERR );



  /* If an error occurs during a ROLLBACK, we can no longer trust the pager
  ** cache. So call pager_error() on the way out to make any error persistent.
  */
  return pager_error(pPager, rc);
}

................................................................................
  ** If the isCommit flag is set, there is no need to remember that
  ** the journal needs to be sync()ed before database page pPg->pgno 
  ** can be written to. The caller has already promised not to write to it.
  */
  if( (pPg->flags&PGHDR_NEED_SYNC) && !isCommit ){
    needSyncPgno = pPg->pgno;
    assert( pPager->journalMode==PAGER_JOURNALMODE_OFF ||
            pageInJournal(pPg) || pPg->pgno>pPager->dbOrigSize );
    assert( pPg->flags&PGHDR_DIRTY );
  }

  /* If the cache contains a page with page-number pgno, remove it
  ** from its hash chain. Also, if the PGHDR_NEED_SYNC flag was set for 
  ** page pgno before the 'move' operation, it needs to be retained 
  ** for the page moved there.
................................................................................
  /* For an in-memory database, make sure the original page continues
  ** to exist, in case the transaction needs to roll back.  Use pPgOld
  ** as the original page since it has already been allocated.
  */
  if( MEMDB ){
    assert( pPgOld );
    sqlite3PcacheMove(pPgOld, origPgno);
    sqlite3PagerUnref(pPgOld);
  }

  if( needSyncPgno ){
    /* If needSyncPgno is non-zero, then the journal file needs to be 
    ** sync()ed before any data is written to database file page needSyncPgno.
    ** Currently, no such page exists in the page-cache and the 
    ** "is journaled" bitvec flag has been set. This needs to be remedied by
................................................................................
        assert( pPager->pTmpSpace!=0 );
        sqlite3BitvecClear(pPager->pInJournal, needSyncPgno, pPager->pTmpSpace);
      }
      return rc;
    }
    pPgHdr->flags |= PGHDR_NEED_SYNC;
    sqlite3PcacheMakeDirty(pPgHdr);
    sqlite3PagerUnref(pPgHdr);
  }

  return SQLITE_OK;
}
#endif

/*
................................................................................
  assert( sqlite3_mutex_held(pBt->mutex) );
  assert( bReadonly==PAGER_GET_READONLY || bReadonly==0 );

  if( pgno>btreePagecount(pBt) ){
    rc = SQLITE_CORRUPT_BKPT;
  }else{
    rc = btreeGetPage(pBt, pgno, ppPage, bReadonly);
    if( rc==SQLITE_OK ){
      rc = btreeInitPage(*ppPage);
      if( rc!=SQLITE_OK ){
        releasePage(*ppPage);
      }
    }
  }

................................................................................
** Release a MemPage.  This should be called once for each prior
** call to btreeGetPage.
*/
static void releasePage(MemPage *pPage){
  if( pPage ){
    assert( pPage->aData );
    assert( pPage->pBt );

    assert( sqlite3PagerGetExtra(pPage->pDbPage) == (void*)pPage );
    assert( sqlite3PagerGetData(pPage->pDbPage)==pPage->aData );
    assert( sqlite3_mutex_held(pPage->pBt->mutex) );
    sqlite3PagerUnref(pPage->pDbPage);
  }
}

/*
** During a rollback, when the pager reloads information into the cache
** so that the cache is restored to its original state at the start of
** the transaction, for each page restored this routine is called.
................................................................................
  }
  return rc;
}

/*
** Return a pointer to payload information from the entry that the 
** pCur cursor is pointing to.  The pointer is to the beginning of
** the key if skipKey==0 and it points to the beginning of data if
** skipKey==1.  The number of bytes of available key/data is written
** into *pAmt.  If *pAmt==0, then the value returned will not be
** a valid pointer.
**
** This routine is an optimization.  It is common for the entire key
** and data to fit on the local page and for there to be no overflow
** pages.  When that is so, this routine can be used to access the
** key and data without making a copy.  If the key and/or data spills
** onto overflow pages, then accessPayload() must be used to reassemble
** the key/data and copy it into a preallocated buffer.
**
** The pointer returned by this routine looks directly into the cached
** page of the database.  The data might change or move the next time
** any btree routine is called.
*/
static const unsigned char *fetchPayload(
  BtCursor *pCur,      /* Cursor pointing to entry to read from */
  u32 *pAmt,           /* Write the number of available bytes here */
  int skipKey          /* read beginning at data if this is true */
){
  unsigned char *aPayload;
  MemPage *pPage;
  u32 nKey;
  u32 nLocal;

  assert( pCur!=0 && pCur->iPage>=0 && pCur->apPage[pCur->iPage]);
  assert( pCur->eState==CURSOR_VALID );

  assert( cursorHoldsMutex(pCur) );
  pPage = pCur->apPage[pCur->iPage];
  assert( pCur->aiIdx[pCur->iPage]<pPage->nCell );
  if( pCur->info.nSize==0 ){
    btreeParseCell(pCur->apPage[pCur->iPage], pCur->aiIdx[pCur->iPage],
                   &pCur->info);
  }
  aPayload = pCur->info.pCell;
  aPayload += pCur->info.nHeader;
  if( pPage->intKey ){
    nKey = 0;
  }else{
    nKey = (int)pCur->info.nKey;
  }
  if( skipKey ){
    aPayload += nKey;
    nLocal = pCur->info.nLocal - nKey;
  }else{
    nLocal = pCur->info.nLocal;
    assert( nLocal<=nKey );
  }
  *pAmt = nLocal;
  return aPayload;

}


/*
** For the entry that cursor pCur is point to, return as
** many bytes of the key or data as are available on the local
** b-tree page.  Write the number of available bytes into *pAmt.
................................................................................
** Hence, a mutex on the BtShared should be held prior to calling
** this routine.
**
** These routines is used to get quick access to key and data
** in the common case where no overflow pages are used.
*/
SQLITE_PRIVATE const void *sqlite3BtreeKeyFetch(BtCursor *pCur, u32 *pAmt){
  const void *p = 0;
  assert( sqlite3_mutex_held(pCur->pBtree->db->mutex) );
  assert( cursorHoldsMutex(pCur) );
  if( ALWAYS(pCur->eState==CURSOR_VALID) ){
    p = (const void*)fetchPayload(pCur, pAmt, 0);
  }
  return p;
}
SQLITE_PRIVATE const void *sqlite3BtreeDataFetch(BtCursor *pCur, u32 *pAmt){
  const void *p = 0;
  assert( sqlite3_mutex_held(pCur->pBtree->db->mutex) );
  assert( cursorHoldsMutex(pCur) );
  if( ALWAYS(pCur->eState==CURSOR_VALID) ){
    p = (const void*)fetchPayload(pCur, pAmt, 1);
  }
  return p;
}


/*
** Move the cursor down to a new child page.  The newPgno argument is the
** page number of the child page to move to.
**
................................................................................
** indicating a table b-tree, or if the caller did specify a KeyInfo 
** structure the flags byte is set to 0x02 or 0x0A, indicating an index
** b-tree).
*/
static int moveToRoot(BtCursor *pCur){
  MemPage *pRoot;
  int rc = SQLITE_OK;
  Btree *p = pCur->pBtree;
  BtShared *pBt = p->pBt;

  assert( cursorHoldsMutex(pCur) );
  assert( CURSOR_INVALID < CURSOR_REQUIRESEEK );
  assert( CURSOR_VALID   < CURSOR_REQUIRESEEK );
  assert( CURSOR_FAULT   > CURSOR_REQUIRESEEK );
  if( pCur->eState>=CURSOR_REQUIRESEEK ){
    if( pCur->eState==CURSOR_FAULT ){
................................................................................
      assert( pCur->skipNext!=SQLITE_OK );
      return pCur->skipNext;
    }
    sqlite3BtreeClearCursor(pCur);
  }

  if( pCur->iPage>=0 ){
    int i;
    for(i=1; i<=pCur->iPage; i++){
      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 ? PAGER_GET_READONLY : 0);
    if( rc!=SQLITE_OK ){
      pCur->eState = CURSOR_INVALID;
      return rc;
    }
    pCur->iPage = 0;

................................................................................
  assert( pRoot->isInit && (pCur->pKeyInfo==0)==pRoot->intKey );

  pCur->aiIdx[0] = 0;
  pCur->info.nSize = 0;
  pCur->atLast = 0;
  pCur->validNKey = 0;

  if( pRoot->nCell==0 && !pRoot->leaf ){


    Pgno subpage;
    if( pRoot->pgno!=1 ) return SQLITE_CORRUPT_BKPT;
    subpage = get4byte(&pRoot->aData[pRoot->hdrOffset+8]);
    pCur->eState = CURSOR_VALID;
    rc = moveToChild(pCur, subpage);
  }else{
    pCur->eState = ((pRoot->nCell>0)?CURSOR_VALID:CURSOR_INVALID);
  }
  return rc;
}

/*
** Move the cursor down to the left-most leaf entry beneath the
** entry to which it is currently pointing.
................................................................................
        ** page is less than 16384 bytes and may be stored as a 2-byte
        ** varint. This information is used to attempt to avoid parsing 
        ** the entire cell by checking for the cases where the record is 
        ** stored entirely within the b-tree page by inspecting the first 
        ** 2 bytes of the cell.
        */
        nCell = pCell[0];
        if( nCell<=pPage->max1bytePayload
         /* && (pCell+nCell)<pPage->aDataEnd */
        ){
          /* This branch runs if the record-size field of the cell is a
          ** single byte varint and the record fits entirely on the main
          ** b-tree page.  */
          testcase( pCell+nCell+1==pPage->aDataEnd );
          c = sqlite3VdbeRecordCompare(nCell, (void*)&pCell[1], pIdxKey);
        }else if( !(pCell[1] & 0x80) 
          && (nCell = ((nCell&0x7f)<<7) + pCell[1])<=pPage->maxLocal
          /* && (pCell+nCell+2)<=pPage->aDataEnd */
        ){
          /* The record-size field is a 2 byte varint and the record 
          ** fits entirely on the main b-tree page.  */
          testcase( pCell+nCell+2==pPage->aDataEnd );
          c = sqlite3VdbeRecordCompare(nCell, (void*)&pCell[2], pIdxKey);
        }else{
          /* The record flows over onto one or more overflow pages. In
................................................................................

  /* Fill in the header. */
  nHeader = 0;
  if( !pPage->leaf ){
    nHeader += 4;
  }
  if( pPage->hasData ){
    nHeader += putVarint(&pCell[nHeader], nData+nZero);
  }else{
    nData = nZero = 0;
  }
  nHeader += putVarint(&pCell[nHeader], *(u64*)&nKey);
  btreeParseCellPtr(pPage, pCell, &info);
  assert( info.nHeader==nHeader );
  assert( info.nKey==nKey );
................................................................................
**
** "sz" must be the number of bytes in the cell.
*/
static void dropCell(MemPage *pPage, int idx, int sz, int *pRC){
  u32 pc;         /* Offset to cell content of cell being deleted */
  u8 *data;       /* pPage->aData */
  u8 *ptr;        /* Used to move bytes around within data[] */
  u8 *endPtr;     /* End of loop */
  int rc;         /* The return code */
  int hdr;        /* Beginning of the header.  0 most pages.  100 page 1 */

  if( *pRC ) return;

  assert( idx>=0 && idx<pPage->nCell );
  assert( sz==cellSize(pPage, idx) );
................................................................................
    return;
  }
  rc = freeSpace(pPage, pc, sz);
  if( rc ){
    *pRC = rc;
    return;
  }
  endPtr = &pPage->aCellIdx[2*pPage->nCell - 2];
  assert( (SQLITE_PTR_TO_INT(ptr)&1)==0 );  /* ptr is always 2-byte aligned */
  while( ptr<endPtr ){
    *(u16*)ptr = *(u16*)&ptr[2];
    ptr += 2;
  }
  pPage->nCell--;

  put2byte(&data[hdr+3], pPage->nCell);
  pPage->nFree += 2;
}

/*
** Insert a new cell on pPage at cell index "i".  pCell points to the
** content of the cell.
................................................................................
){
  int idx = 0;      /* Where to write new cell content in data[] */
  int j;            /* Loop counter */
  int end;          /* First byte past the last cell pointer in data[] */
  int ins;          /* Index in data[] where new cell pointer is inserted */
  int cellOffset;   /* Address of first cell pointer in data[] */
  u8 *data;         /* The content of the whole page */
  u8 *ptr;          /* Used for moving information around in data[] */
  u8 *endPtr;       /* End of the loop */

  int nSkip = (iChild ? 4 : 0);

  if( *pRC ) return;

  assert( i>=0 && i<=pPage->nCell+pPage->nOverflow );
  assert( pPage->nCell<=MX_CELL(pPage->pBt) && MX_CELL(pPage->pBt)<=10921 );
  assert( pPage->nOverflow<=ArraySize(pPage->apOvfl) );
................................................................................
    assert( idx+sz <= (int)pPage->pBt->usableSize );
    pPage->nCell++;
    pPage->nFree -= (u16)(2 + sz);
    memcpy(&data[idx+nSkip], pCell+nSkip, sz-nSkip);
    if( iChild ){
      put4byte(&data[idx], iChild);
    }
    ptr = &data[end];
    endPtr = &data[ins];
    assert( (SQLITE_PTR_TO_INT(ptr)&1)==0 );  /* ptr is always 2-byte aligned */
    while( ptr>endPtr ){
      *(u16*)ptr = *(u16*)&ptr[-2];
      ptr -= 2;
    }
    put2byte(&data[ins], idx);
    put2byte(&data[pPage->hdrOffset+3], pPage->nCell);
#ifndef SQLITE_OMIT_AUTOVACUUM
    if( pPage->pBt->autoVacuum ){
      /* The cell may contain a pointer to an overflow page. If so, write
      ** the entry for the overflow page into the pointer map.
      */
................................................................................
  int freePageFlag,        /* Deallocate page if true */
  int *pnChange            /* Add number of Cells freed to this counter */
){
  MemPage *pPage;
  int rc;
  unsigned char *pCell;
  int i;


  assert( sqlite3_mutex_held(pBt->mutex) );
  if( pgno>btreePagecount(pBt) ){
    return SQLITE_CORRUPT_BKPT;
  }

  rc = getAndInitPage(pBt, pgno, &pPage, 0);
  if( rc ) return rc;

  for(i=0; i<pPage->nCell; i++){
    pCell = findCell(pPage, i);
    if( !pPage->leaf ){
      rc = clearDatabasePage(pBt, get4byte(pCell), 1, pnChange);
      if( rc ) goto cleardatabasepage_out;
    }
    rc = clearCell(pPage, pCell);
    if( rc ) goto cleardatabasepage_out;
  }
  if( !pPage->leaf ){
    rc = clearDatabasePage(pBt, get4byte(&pPage->aData[8]), 1, pnChange);
    if( rc ) goto cleardatabasepage_out;
  }else if( pnChange ){
    assert( pPage->intKey );
    *pnChange += pPage->nCell;
  }
  if( freePageFlag ){
    freePage(pPage, &rc);
  }else if( (rc = sqlite3PagerWrite(pPage->pDbPage))==0 ){
    zeroPage(pPage, pPage->aData[0] | PTF_LEAF);
  }

cleardatabasepage_out:
  releasePage(pPage);
  return rc;
}

................................................................................
  pCheck->mxErr--;
  pCheck->nErr++;
  va_start(ap, zFormat);
  if( pCheck->errMsg.nChar ){
    sqlite3StrAccumAppend(&pCheck->errMsg, "\n", 1);
  }
  if( zMsg1 ){
    sqlite3StrAccumAppend(&pCheck->errMsg, zMsg1, -1);
  }
  sqlite3VXPrintf(&pCheck->errMsg, 1, zFormat, ap);
  va_end(ap);
  if( pCheck->errMsg.accError==STRACCUM_NOMEM ){
    pCheck->mallocFailed = 1;
  }
}
................................................................................
          }
          if( rc==SQLITE_OK ){
            rc = backupTruncateFile(pFile, iSize);
          }

          /* Sync the database file to disk. */
          if( rc==SQLITE_OK ){
            rc = sqlite3PagerSync(pDestPager);
          }
        }else{
          sqlite3PagerTruncateImage(pDestPager, nDestTruncate);
          rc = sqlite3PagerCommitPhaseOne(pDestPager, 0, 0);
        }
    
        /* Finish committing the transaction to the destination database. */
................................................................................
  }

  /* If a transaction is still open on the Btree, roll it back. */
  sqlite3BtreeRollback(p->pDest, SQLITE_OK);

  /* Set the error code of the destination database handle. */
  rc = (p->rc==SQLITE_DONE) ? SQLITE_OK : p->rc;

  sqlite3Error(p->pDestDb, rc, 0);

  /* Exit the mutexes and free the backup context structure. */
  if( p->pDestDb ){
    sqlite3LeaveMutexAndCloseZombie(p->pDestDb);
  }
  sqlite3BtreeLeave(p->pSrc);
  if( p->pDestDb ){
    /* EVIDENCE-OF: R-64852-21591 The sqlite3_backup object is created by a
    ** call to sqlite3_backup_init() and is destroyed by a call to
    ** sqlite3_backup_finish(). */
................................................................................
  assert(rc==SQLITE_NOMEM || pMem->enc==desiredEnc);
  return rc;
#endif
}

/*
** Make sure pMem->z points to a writable allocation of at least 
** n bytes.
**
** If the third argument passed to this function is true, then memory
** cell pMem must contain a string or blob. In this case the content is
** preserved. Otherwise, if the third parameter to this function is false,
** any current string or blob value may be discarded.
**
** This function sets the MEM_Dyn flag and clears any xDel callback.
** It also clears MEM_Ephem and MEM_Static. If the preserve flag is 
** not set, Mem.n is zeroed.
*/
SQLITE_PRIVATE int sqlite3VdbeMemGrow(Mem *pMem, int n, int preserve){
  assert( 1 >=
    ((pMem->zMalloc && pMem->zMalloc==pMem->z) ? 1 : 0) +
    (((pMem->flags&MEM_Dyn)&&pMem->xDel) ? 1 : 0) + 
    ((pMem->flags&MEM_Ephem) ? 1 : 0) + 
    ((pMem->flags&MEM_Static) ? 1 : 0)
  );
  assert( (pMem->flags&MEM_RowSet)==0 );

  /* If the preserve flag is set to true, then the memory cell must already
  ** contain a valid string or blob value.  */
  assert( preserve==0 || pMem->flags&(MEM_Blob|MEM_Str) );



  if( n<32 ) n = 32;
  if( sqlite3DbMallocSize(pMem->db, pMem->zMalloc)<n ){
    if( preserve && pMem->z==pMem->zMalloc ){
      pMem->z = pMem->zMalloc = sqlite3DbReallocOrFree(pMem->db, pMem->z, n);
      preserve = 0;
    }else{
      sqlite3DbFree(pMem->db, pMem->zMalloc);
      pMem->zMalloc = sqlite3DbMallocRaw(pMem->db, n);
    }




  }

  if( pMem->z && preserve && pMem->zMalloc && pMem->z!=pMem->zMalloc ){


    memcpy(pMem->zMalloc, pMem->z, pMem->n);
  }
  if( pMem->flags&MEM_Dyn && pMem->xDel ){
    assert( pMem->xDel!=SQLITE_DYNAMIC );
    pMem->xDel((void *)(pMem->z));
  }

  pMem->z = pMem->zMalloc;
  if( pMem->z==0 ){
    pMem->flags = MEM_Null;
  }else{
    pMem->flags &= ~(MEM_Ephem|MEM_Static);
  }
  pMem->xDel = 0;
  return (pMem->z ? SQLITE_OK : SQLITE_NOMEM);

}

/*
** Make the given Mem object MEM_Dyn.  In other words, make it so
** that any TEXT or BLOB content is stored in memory obtained from
** malloc().  In this way, we know that the memory is safe to be
** overwritten or altered.
................................................................................
/*
** Release any memory held by the Mem. This may leave the Mem in an
** inconsistent state, for example with (Mem.z==0) and
** (Mem.type==SQLITE_TEXT).
*/
SQLITE_PRIVATE void sqlite3VdbeMemRelease(Mem *p){
  VdbeMemRelease(p);

  sqlite3DbFree(p->db, p->zMalloc);
  p->z = 0;
  p->zMalloc = 0;

  p->xDel = 0;

}

/*
** Convert a 64-bit IEEE double into a 64-bit signed integer.
** If the double is out of range of a 64-bit signed integer then
** return the closest available 64-bit signed integer.
*/
................................................................................
    pFrame->v->pDelFrame = pFrame;
  }
  if( pMem->flags & MEM_RowSet ){
    sqlite3RowSetClear(pMem->u.pRowSet);
  }
  MemSetTypeFlag(pMem, MEM_Null);
  pMem->type = SQLITE_NULL;



}

/*
** Delete any previous value and set the value to be a BLOB of length
** n containing all zeros.
*/
SQLITE_PRIVATE void sqlite3VdbeMemSetZeroBlob(Mem *pMem, int n){
................................................................................
  nRet = 1 + nSerial + nVal;
  aRet = sqlite3DbMallocRaw(db, nRet);
  if( aRet==0 ){
    sqlite3_result_error_nomem(context);
  }else{
    aRet[0] = nSerial+1;
    sqlite3PutVarint(&aRet[1], iSerial);
    sqlite3VdbeSerialPut(&aRet[1+nSerial], nVal, argv[0], file_format);
    sqlite3_result_blob(context, aRet, nRet, SQLITE_TRANSIENT);
    sqlite3DbFree(db, aRet);
  }
}

/*
** Register built-in functions used to help read ANALYZE data.
................................................................................
** to version 2.8.7, all this code was combined into the vdbe.c source file.
** But that file was getting too big so this subroutines were split out.
*/

/*
** Create a new virtual database engine.
*/
SQLITE_PRIVATE Vdbe *sqlite3VdbeCreate(sqlite3 *db){

  Vdbe *p;
  p = sqlite3DbMallocZero(db, sizeof(Vdbe) );
  if( p==0 ) return 0;
  p->db = db;
  if( db->pVdbe ){
    db->pVdbe->pPrev = p;
  }
  p->pNext = db->pVdbe;
  p->pPrev = 0;
  db->pVdbe = p;
  p->magic = VDBE_MAGIC_INIT;




  return p;
}

/*
** Remember the SQL string for a prepared statement.
*/
SQLITE_PRIVATE void sqlite3VdbeSetSql(Vdbe *p, const char *z, int n, int isPrepareV2){
................................................................................
** it was.
**
** If an out-of-memory error occurs while resizing the array, return
** SQLITE_NOMEM. In this case Vdbe.aOp and Vdbe.nOpAlloc remain 
** unchanged (this is so that any opcodes already allocated can be 
** correctly deallocated along with the rest of the Vdbe).
*/
static int growOpArray(Vdbe *p){
  VdbeOp *pNew;

  int nNew = (p->nOpAlloc ? p->nOpAlloc*2 : (int)(1024/sizeof(Op)));
  pNew = sqlite3DbRealloc(p->db, p->aOp, nNew*sizeof(Op));
  if( pNew ){
    p->nOpAlloc = sqlite3DbMallocSize(p->db, pNew)/sizeof(Op);
    p->aOp = pNew;
  }
  return (pNew ? SQLITE_OK : SQLITE_NOMEM);
}

#ifdef SQLITE_DEBUG
/* This routine is just a convenient place to set a breakpoint that will
** fire after each opcode is inserted and displayed using
................................................................................
SQLITE_PRIVATE int sqlite3VdbeAddOp3(Vdbe *p, int op, int p1, int p2, int p3){
  int i;
  VdbeOp *pOp;

  i = p->nOp;
  assert( p->magic==VDBE_MAGIC_INIT );
  assert( op>0 && op<0xff );
  if( p->nOpAlloc<=i ){
    if( growOpArray(p) ){
      return 1;
    }
  }
  p->nOp++;
  pOp = &p->aOp[i];
  pOp->opcode = (u8)op;
................................................................................
  pOp->p4.p = 0;
  pOp->p4type = P4_NOTUSED;
#ifdef SQLITE_ENABLE_EXPLAIN_COMMENTS
  pOp->zComment = 0;
#endif
#ifdef SQLITE_DEBUG
  if( p->db->flags & SQLITE_VdbeAddopTrace ){









    sqlite3VdbePrintOp(0, i, &p->aOp[i]);
    test_addop_breakpoint();
  }
#endif
#ifdef VDBE_PROFILE
  pOp->cycles = 0;
  pOp->cnt = 0;
................................................................................
**
** The VDBE knows that a P2 value is a label because labels are
** always negative and P2 values are suppose to be non-negative.
** Hence, a negative P2 value is a label that has yet to be resolved.
**
** Zero is returned if a malloc() fails.
*/
SQLITE_PRIVATE int sqlite3VdbeMakeLabel(Vdbe *p){

  int i = p->nLabel++;
  assert( p->magic==VDBE_MAGIC_INIT );
  if( (i & (i-1))==0 ){
    p->aLabel = sqlite3DbReallocOrFree(p->db, p->aLabel, 
                                       (i*2+1)*sizeof(p->aLabel[0]));
  }
  if( p->aLabel ){
    p->aLabel[i] = -1;
  }
................................................................................
}

/*
** 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<p->nLabel );
  if( j>=0 && p->aLabel ){
    p->aLabel[j] = p->nOp;
  }

}

/*
** Mark the VDBE as one that can only be run one time.
*/
SQLITE_PRIVATE void sqlite3VdbeRunOnlyOnce(Vdbe *p){
  p->runOnlyOnce = 1;
................................................................................
**
** The Op.opflags field is set on all opcodes.
*/
static void resolveP2Values(Vdbe *p, int *pMaxFuncArgs){
  int i;
  int nMaxArgs = *pMaxFuncArgs;
  Op *pOp;

  int *aLabel = p->aLabel;
  p->readOnly = 1;
  p->bIsReader = 0;
  for(pOp=p->aOp, i=p->nOp-1; i>=0; i--, pOp++){
    u8 opcode = pOp->opcode;

    /* NOTE: Be sure to update mkopcodeh.awk when adding or removing
    ** cases from this switch! */
................................................................................
        pOp->p4type = P4_ADVANCE;
        break;
      }
    }

    pOp->opflags = sqlite3OpcodeProperty[opcode];
    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;
  assert( p->bIsReader!=0 || p->btreeMask==0 );
}

/*
** Return the address of the next instruction to be inserted.
*/
................................................................................
/*
** Add a whole list of operations to the operation stack.  Return the
** address of the first operation added.
*/
SQLITE_PRIVATE int sqlite3VdbeAddOpList(Vdbe *p, int nOp, VdbeOpList const *aOp){
  int addr;
  assert( p->magic==VDBE_MAGIC_INIT );
  if( p->nOp + nOp > p->nOpAlloc && growOpArray(p) ){
    return 0;
  }
  addr = p->nOp;
  if( ALWAYS(nOp>0) ){
    int i;
    VdbeOpList const *pIn = aOp;
    for(i=0; i<nOp; i++, pIn++){
................................................................................
}

/*
** 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){
  if( ALWAYS(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.
*/
................................................................................
    sqlite3 *db = p->db;
    freeP4(db, pOp->p4type, pOp->p4.p);
    memset(pOp, 0, sizeof(pOp[0]));
    pOp->opcode = OP_Noop;
    if( addr==p->nOp-1 ) p->nOp--;
  }
}













/*
** Change the value of the P4 operand for a specific instruction.
** This routine is useful when a large program is loaded from a
** static array using sqlite3VdbeAddOpList but we want to make a
** few minor changes to the program.
**
................................................................................
  if( c=='2' ) return pOp->p2;
  if( c=='3' ) return pOp->p3;
  if( c=='4' ) return pOp->p4.i;
  return pOp->p5;
}

/*
** Compute a string for the "comment" field of a VDBE opcode listing










*/
static int displayComment(
  const Op *pOp,     /* The opcode to be commented */
  const char *zP4,   /* Previously obtained value for P4 */
  char *zTemp,       /* Write result here */
  int nTemp          /* Space available in zTemp[] */
){
................................................................................
          int v1 = translateP(c, pOp);
          int v2;
          sqlite3_snprintf(nTemp-jj, zTemp+jj, "%d", v1);
          if( strncmp(zSynopsis+ii+1, "@P", 2)==0 ){
            ii += 3;
            jj += sqlite3Strlen30(zTemp+jj);
            v2 = translateP(zSynopsis[ii], pOp);





            if( v2>1 ) sqlite3_snprintf(nTemp-jj, zTemp+jj, "..%d", v1+v2-1);

          }else if( strncmp(zSynopsis+ii+1, "..P3", 4)==0 && pOp->p3==0 ){
            ii += 4;
          }
        }
        jj += sqlite3Strlen30(zTemp+jj);
      }else{
        zTemp[jj++] = c;
................................................................................
  if( pOut==0 ) pOut = stdout;
  zP4 = displayP4(pOp, zPtr, sizeof(zPtr));
#ifdef SQLITE_ENABLE_EXPLAIN_COMMENTS
  displayComment(pOp, zP4, zCom, sizeof(zCom));
#else
  zCom[0] = 0
#endif



  fprintf(pOut, zFormat1, pc, 
      sqlite3OpcodeName(pOp->opcode), pOp->p1, pOp->p2, pOp->p3, zP4, pOp->p5,
      zCom
  );
  fflush(pOut);
}
#endif
................................................................................
  u8 *zEnd;                      /* First byte past allocated memory */
  int nByte;                     /* How much extra memory is needed */

  assert( p!=0 );
  assert( p->nOp>0 );
  assert( pParse!=0 );
  assert( p->magic==VDBE_MAGIC_INIT );

  db = p->db;
  assert( db->mallocFailed==0 );
  nVar = pParse->nVar;
  nMem = pParse->nMem;
  nCursor = pParse->nTab;
  nArg = pParse->nMaxArg;
  nOnce = pParse->nOnce;
................................................................................
  ** See also: allocateCursor().
  */
  nMem += nCursor;

  /* Allocate space for memory registers, SQL variables, VDBE cursors and 
  ** an array to marshal SQL function arguments in.
  */
  zCsr = (u8*)&p->aOp[p->nOp];       /* Memory avaliable for allocation */
  zEnd = (u8*)&p->aOp[p->nOpAlloc];  /* First byte past end of zCsr[] */

  resolveP2Values(p, &nArg);
  p->usesStmtJournal = (u8)(pParse->isMultiWrite && pParse->mayAbort);
  if( pParse->explain && nMem<10 ){
    nMem = 10;
  }
  memset(zCsr, 0, zEnd-zCsr);
................................................................................
*/
SQLITE_PRIVATE int sqlite3VdbeTransferError(Vdbe *p){
  sqlite3 *db = p->db;
  int rc = p->rc;
  if( p->zErrMsg ){
    u8 mallocFailed = db->mallocFailed;
    sqlite3BeginBenignMalloc();

    sqlite3ValueSetStr(db->pErr, -1, p->zErrMsg, SQLITE_UTF8, SQLITE_TRANSIENT);
    sqlite3EndBenignMalloc();
    db->mallocFailed = mallocFailed;
    db->errCode = rc;
  }else{
    sqlite3Error(db, rc, 0);
  }
................................................................................
    p->zErrMsg = 0;
    if( p->runOnlyOnce ) p->expired = 1;
  }else if( p->rc && p->expired ){
    /* The expired flag was set on the VDBE before the first call
    ** to sqlite3_step(). For consistency (since sqlite3_step() was
    ** called), set the database error in this case as well.
    */
    sqlite3Error(db, p->rc, 0);
    sqlite3ValueSetStr(db->pErr, -1, p->zErrMsg, SQLITE_UTF8, SQLITE_TRANSIENT);
    sqlite3DbFree(db, p->zErrMsg);
    p->zErrMsg = 0;
  }

  /* Reclaim all memory used by the VDBE
  */
  Cleanup(p);
................................................................................
  for(pSub=p->pProgram; pSub; pSub=pNext){
    pNext = pSub->pNext;
    vdbeFreeOpArray(db, pSub->aOp, pSub->nOp);
    sqlite3DbFree(db, pSub);
  }
  for(i=p->nzVar-1; i>=0; i--) sqlite3DbFree(db, p->azVar[i]);
  vdbeFreeOpArray(db, p->aOp, p->nOp);
  sqlite3DbFree(db, p->aLabel);
  sqlite3DbFree(db, p->aColName);
  sqlite3DbFree(db, p->zSql);
  sqlite3DbFree(db, p->pFree);
#if defined(SQLITE_ENABLE_TREE_EXPLAIN)
  sqlite3DbFree(db, p->zExplain);
  sqlite3DbFree(db, p->pExplain);
#endif
................................................................................
#endif

/*
** Write the serialized data blob for the value stored in pMem into 
** buf. It is assumed that the caller has allocated sufficient space.
** Return the number of bytes written.
**
** nBuf is the amount of space left in buf[].  nBuf must always be
** large enough to hold the entire field.  Except, if the field is
** a blob with a zero-filled tail, then buf[] might be just the right
** size to hold everything except for the zero-filled tail.  If buf[]
** is only big enough to hold the non-zero prefix, then only write that
** prefix into buf[].  But if buf[] is large enough to hold both the
** prefix and the tail then write the prefix and set the tail to all
** zeros.
**
** Return the number of bytes actually written into buf[].  The number
** of bytes in the zero-filled tail is included in the return value only
** if those bytes were zeroed in buf[].
*/ 
SQLITE_PRIVATE u32 sqlite3VdbeSerialPut(u8 *buf, int nBuf, Mem *pMem, int file_format){
  u32 serial_type = sqlite3VdbeSerialType(pMem, file_format);
  u32 len;

  /* Integer and Real */
  if( serial_type<=7 && serial_type>0 ){
    u64 v;
    u32 i;
    if( serial_type==7 ){
................................................................................
      assert( sizeof(v)==sizeof(pMem->r) );
      memcpy(&v, &pMem->r, sizeof(v));
      swapMixedEndianFloat(v);
    }else{
      v = pMem->u.i;
    }
    len = i = sqlite3VdbeSerialTypeLen(serial_type);
    assert( len<=(u32)nBuf );
    while( i-- ){
      buf[i] = (u8)(v&0xFF);
      v >>= 8;
    }
    return len;
  }

  /* String or blob */
  if( serial_type>=12 ){
    assert( pMem->n + ((pMem->flags & MEM_Zero)?pMem->u.nZero:0)
             == (int)sqlite3VdbeSerialTypeLen(serial_type) );
    assert( pMem->n<=nBuf );
    len = pMem->n;
    memcpy(buf, pMem->z, len);
    if( pMem->flags & MEM_Zero ){
      len += pMem->u.nZero;
      assert( nBuf>=0 );
      if( len > (u32)nBuf ){
        len = (u32)nBuf;
      }
      memset(&buf[pMem->n], 0, len-pMem->n);
    }
    return len;
  }

  /* NULL or constants 0 or 1 */
  return 0;
}

................................................................................
  while( (rc = sqlite3Step(v))==SQLITE_SCHEMA
         && cnt++ < SQLITE_MAX_SCHEMA_RETRY
         && (rc2 = rc = sqlite3Reprepare(v))==SQLITE_OK ){
    sqlite3_reset(pStmt);
    v->doingRerun = 1;
    assert( v->expired==0 );
  }
  if( rc2!=SQLITE_OK && ALWAYS(v->isPrepareV2) && ALWAYS(db->pErr) ){
    /* This case occurs after failing to recompile an sql statement. 
    ** The error message from the SQL compiler has already been loaded 
    ** into the database handle. This block copies the error message 
    ** from the database handle into the statement and sets the statement
    ** program counter to 0 to ensure that when the statement is 
    ** finalized or reset the parser error message is available via
    ** sqlite3_errmsg() and sqlite3_errcode().
    */
    const char *zErr = (const char *)sqlite3_value_text(db->pErr); 

    sqlite3DbFree(db, v->zErrMsg);
    if( !db->mallocFailed ){
      v->zErrMsg = sqlite3DbStrDup(db, zErr);
      v->rc = rc2;
    } else {
      v->zErrMsg = 0;
      v->rc = rc = SQLITE_NOMEM;
................................................................................
                      db->aLimit[SQLITE_LIMIT_LENGTH]);
  out.db = db;
  if( db->nVdbeExec>1 ){
    while( *zRawSql ){
      const char *zStart = zRawSql;
      while( *(zRawSql++)!='\n' && *zRawSql );
      sqlite3StrAccumAppend(&out, "-- ", 3);

      sqlite3StrAccumAppend(&out, zStart, (int)(zRawSql-zStart));
    }
  }else{
    while( zRawSql[0] ){
      n = findNextHostParameter(zRawSql, &nToken);
      assert( n>0 );
      sqlite3StrAccumAppend(&out, zRawSql, n);
................................................................................
      zRawSql += nToken;
      nextIndex = idx + 1;
      assert( idx>0 && idx<=p->nVar );
      pVar = &p->aVar[idx-1];
      if( pVar->flags & MEM_Null ){
        sqlite3StrAccumAppend(&out, "NULL", 4);
      }else if( pVar->flags & MEM_Int ){
        sqlite3XPrintf(&out, "%lld", pVar->u.i);
      }else if( pVar->flags & MEM_Real ){
        sqlite3XPrintf(&out, "%!.15g", pVar->r);
      }else if( pVar->flags & MEM_Str ){
        int nOut;  /* Number of bytes of the string text to include in output */
#ifndef SQLITE_OMIT_UTF16
        u8 enc = ENC(db);
        Mem utf8;
        if( enc!=SQLITE_UTF8 ){
          memset(&utf8, 0, sizeof(utf8));
................................................................................
        nOut = pVar->n;
#ifdef SQLITE_TRACE_SIZE_LIMIT
        if( nOut>SQLITE_TRACE_SIZE_LIMIT ){
          nOut = SQLITE_TRACE_SIZE_LIMIT;
          while( nOut<pVar->n && (pVar->z[nOut]&0xc0)==0x80 ){ nOut++; }
        }
#endif    
        sqlite3XPrintf(&out, "'%.*q'", nOut, pVar->z);
#ifdef SQLITE_TRACE_SIZE_LIMIT

        if( nOut<pVar->n ) sqlite3XPrintf(&out, "/*+%d bytes*/", pVar->n-nOut);

#endif
#ifndef SQLITE_OMIT_UTF16
        if( enc!=SQLITE_UTF8 ) sqlite3VdbeMemRelease(&utf8);
#endif
      }else if( pVar->flags & MEM_Zero ){
        sqlite3XPrintf(&out, "zeroblob(%d)", pVar->u.nZero);
      }else{
        int nOut;  /* Number of bytes of the blob to include in output */
        assert( pVar->flags & MEM_Blob );
        sqlite3StrAccumAppend(&out, "x'", 2);
        nOut = pVar->n;
#ifdef SQLITE_TRACE_SIZE_LIMIT
        if( nOut>SQLITE_TRACE_SIZE_LIMIT ) nOut = SQLITE_TRACE_SIZE_LIMIT;
#endif
        for(i=0; i<nOut; i++){
          sqlite3XPrintf(&out, "%02x", pVar->z[i]&0xff);
        }
        sqlite3StrAccumAppend(&out, "'", 1);
#ifdef SQLITE_TRACE_SIZE_LIMIT

        if( nOut<pVar->n ) sqlite3XPrintf(&out, "/*+%d bytes*/", pVar->n-nOut);

#endif
      }
    }
  }
  return sqlite3StrAccumFinish(&out);
}

................................................................................
    va_list ap;
    if( p->nIndent && endsWithNL(p) ){
      int n = p->nIndent;
      if( n>ArraySize(p->aIndent) ) n = ArraySize(p->aIndent);
      sqlite3AppendSpace(&p->str, p->aIndent[n-1]);
    }   
    va_start(ap, zFormat);
    sqlite3VXPrintf(&p->str, 1, zFormat, ap);
    va_end(ap);
  }
}

/*
** Append a '\n' if there is not already one.
*/
................................................................................
  Mem *pOut = 0;             /* Output operand */
  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
  /********************************************************************
  ** Automatically generated code
  **
  ** The following union is automatically generated by the
  ** vdbe-compress.tcl script.  The purpose of this union is to
  ** reduce the amount of stack space required by this function.
  ** See comments in the vdbe-compress.tcl script for details.
  */
  union vdbeExecUnion {
    struct OP_Yield_stack_vars {
      int pcDest;
    } aa;
    struct OP_Halt_stack_vars {
      const char *zType;
      const char *zLogFmt;
    } ab;
    struct OP_Null_stack_vars {
      int cnt;
      u16 nullFlag;
    } ac;
    struct OP_Variable_stack_vars {
      Mem *pVar;       /* Value being transferred */
    } ad;
    struct OP_Move_stack_vars {
      char *zMalloc;   /* Holding variable for allocated memory */
      int n;           /* Number of registers left to copy */
      int p1;          /* Register to copy from */
      int p2;          /* Register to copy to */
    } ae;
    struct OP_Copy_stack_vars {
      int n;
    } af;
    struct OP_ResultRow_stack_vars {
      Mem *pMem;
      int i;
    } ag;
    struct OP_Concat_stack_vars {
      i64 nByte;
    } ah;
    struct OP_Remainder_stack_vars {
      char bIntint;   /* Started out as two integer operands */
      int flags;      /* Combined MEM_* flags from both inputs */
      i64 iA;         /* Integer value of left operand */
      i64 iB;         /* Integer value of right operand */
      double rA;      /* Real value of left operand */
      double rB;      /* Real value of right operand */
    } ai;
    struct OP_Function_stack_vars {
      int i;
      Mem *pArg;
      sqlite3_context ctx;
      sqlite3_value **apVal;
      int n;
    } aj;
    struct OP_ShiftRight_stack_vars {
      i64 iA;
      u64 uA;
      i64 iB;
      u8 op;
    } ak;
    struct OP_Ge_stack_vars {
      int res;            /* Result of the comparison of pIn1 against pIn3 */
      char affinity;      /* Affinity to use for comparison */
      u16 flags1;         /* Copy of initial value of pIn1->flags */
      u16 flags3;         /* Copy of initial value of pIn3->flags */
    } al;
    struct OP_Compare_stack_vars {
      int n;
      int i;
      int p1;
      int p2;
      const KeyInfo *pKeyInfo;
      int idx;
      CollSeq *pColl;    /* Collating sequence to use on this term */
      int bRev;          /* True for DESCENDING sort order */
    } am;
    struct OP_Or_stack_vars {
      int v1;    /* Left operand:  0==FALSE, 1==TRUE, 2==UNKNOWN or NULL */
      int v2;    /* Right operand: 0==FALSE, 1==TRUE, 2==UNKNOWN or NULL */
    } an;
    struct OP_IfNot_stack_vars {
      int c;
    } ao;
    struct OP_Column_stack_vars {
      i64 payloadSize64; /* Number of bytes in the record */
      int p2;            /* column number to retrieve */
      VdbeCursor *pC;    /* The VDBE cursor */
      BtCursor *pCrsr;   /* The BTree cursor */
      u32 *aType;        /* aType[i] holds the numeric type of the i-th column */
      u32 *aOffset;      /* aOffset[i] is offset to start of data for i-th column */
      int len;           /* The length of the serialized data for the column */
      int i;             /* Loop counter */
      Mem *pDest;        /* Where to write the extracted value */
      Mem sMem;          /* For storing the record being decoded */
      const u8 *zData;   /* Part of the record being decoded */
      const u8 *zHdr;    /* Next unparsed byte of the header */
      const u8 *zEndHdr; /* Pointer to first byte after the header */
      u32 offset;        /* Offset into the data */
      u32 szField;       /* Number of bytes in the content of a field */
      u32 avail;         /* Number of bytes of available data */
      u32 t;             /* A type code from the record header */
      Mem *pReg;         /* PseudoTable input register */
    } ap;
    struct OP_Affinity_stack_vars {
      const char *zAffinity;   /* The affinity to be applied */
      char cAff;               /* A single character of affinity */
    } aq;
    struct OP_MakeRecord_stack_vars {
      u8 *zNewRecord;        /* A buffer to hold the data for the new record */
      Mem *pRec;             /* The new record */
      u64 nData;             /* Number of bytes of data space */
      int nHdr;              /* Number of bytes of header space */
      i64 nByte;             /* Data space required for this record */
      int nZero;             /* Number of zero bytes at the end of the record */
      int nVarint;           /* Number of bytes in a varint */
      u32 serial_type;       /* Type field */
      Mem *pData0;           /* First field to be combined into the record */
      Mem *pLast;            /* Last field of the record */
      int nField;            /* Number of fields in the record */
      char *zAffinity;       /* The affinity string for the record */
      int file_format;       /* File format to use for encoding */
      int i;                 /* Space used in zNewRecord[] */
      int len;               /* Length of a field */
    } ar;
    struct OP_Count_stack_vars {
      i64 nEntry;
      BtCursor *pCrsr;
    } as;
    struct OP_Savepoint_stack_vars {
      int p1;                         /* Value of P1 operand */
      char *zName;                    /* Name of savepoint */
      int nName;
      Savepoint *pNew;
      Savepoint *pSavepoint;
      Savepoint *pTmp;
      int iSavepoint;
      int ii;
    } at;
    struct OP_AutoCommit_stack_vars {
      int desiredAutoCommit;
      int iRollback;
      int turnOnAC;
    } au;
    struct OP_Transaction_stack_vars {
      Btree *pBt;
    } av;
    struct OP_ReadCookie_stack_vars {
      int iMeta;
      int iDb;
      int iCookie;
    } aw;
    struct OP_SetCookie_stack_vars {
      Db *pDb;
    } ax;
    struct OP_VerifyCookie_stack_vars {
      int iMeta;
      int iGen;
      Btree *pBt;
    } ay;
    struct OP_OpenWrite_stack_vars {
      int nField;
      KeyInfo *pKeyInfo;
      int p2;
      int iDb;
      int wrFlag;
      Btree *pX;
      VdbeCursor *pCur;
      Db *pDb;
    } az;
    struct OP_OpenEphemeral_stack_vars {
      VdbeCursor *pCx;
      KeyInfo *pKeyInfo;
    } ba;
    struct OP_SorterOpen_stack_vars {
      VdbeCursor *pCx;
    } bb;
    struct OP_OpenPseudo_stack_vars {
      VdbeCursor *pCx;
    } bc;
    struct OP_SeekGt_stack_vars {
      int res;
      int oc;
      VdbeCursor *pC;
      UnpackedRecord r;
      int nField;
      i64 iKey;      /* The rowid we are to seek to */
    } bd;
    struct OP_Seek_stack_vars {
      VdbeCursor *pC;
    } be;
    struct OP_Found_stack_vars {
      int alreadyExists;
      int ii;
      VdbeCursor *pC;
      int res;
      char *pFree;
      UnpackedRecord *pIdxKey;
      UnpackedRecord r;
      char aTempRec[ROUND8(sizeof(UnpackedRecord)) + sizeof(Mem)*4 + 7];
    } bf;
    struct OP_NotExists_stack_vars {
      VdbeCursor *pC;
      BtCursor *pCrsr;
      int res;
      u64 iKey;
    } bg;
    struct OP_NewRowid_stack_vars {
      i64 v;                 /* The new rowid */
      VdbeCursor *pC;        /* Cursor of table to get the new rowid */
      int res;               /* Result of an sqlite3BtreeLast() */
      int cnt;               /* Counter to limit the number of searches */
      Mem *pMem;             /* Register holding largest rowid for AUTOINCREMENT */
      VdbeFrame *pFrame;     /* Root frame of VDBE */
    } bh;
    struct OP_InsertInt_stack_vars {
      Mem *pData;       /* MEM cell holding data for the record to be inserted */
      Mem *pKey;        /* MEM cell holding key  for the record */
      i64 iKey;         /* The integer ROWID or key for the record to be inserted */
      VdbeCursor *pC;   /* Cursor to table into which insert is written */
      int nZero;        /* Number of zero-bytes to append */
      int seekResult;   /* Result of prior seek or 0 if no USESEEKRESULT flag */
      const char *zDb;  /* database name - used by the update hook */
      const char *zTbl; /* Table name - used by the opdate hook */
      int op;           /* Opcode for update hook: SQLITE_UPDATE or SQLITE_INSERT */
    } bi;
    struct OP_Delete_stack_vars {
      i64 iKey;
      VdbeCursor *pC;
    } bj;
    struct OP_SorterCompare_stack_vars {
      VdbeCursor *pC;
      int res;
      int nIgnore;
    } bk;
    struct OP_SorterData_stack_vars {
      VdbeCursor *pC;
    } bl;
    struct OP_RowData_stack_vars {
      VdbeCursor *pC;
      BtCursor *pCrsr;
      u32 n;
      i64 n64;
    } bm;
    struct OP_Rowid_stack_vars {
      VdbeCursor *pC;
      i64 v;
      sqlite3_vtab *pVtab;
      const sqlite3_module *pModule;
    } bn;
    struct OP_NullRow_stack_vars {
      VdbeCursor *pC;
    } bo;
    struct OP_Last_stack_vars {
      VdbeCursor *pC;
      BtCursor *pCrsr;
      int res;
    } bp;
    struct OP_Rewind_stack_vars {
      VdbeCursor *pC;
      BtCursor *pCrsr;
      int res;
    } bq;
    struct OP_SorterNext_stack_vars {
      VdbeCursor *pC;
      int res;
    } br;
    struct OP_IdxInsert_stack_vars {
      VdbeCursor *pC;
      BtCursor *pCrsr;
      int nKey;
      const char *zKey;
    } bs;
    struct OP_IdxDelete_stack_vars {
      VdbeCursor *pC;
      BtCursor *pCrsr;
      int res;
      UnpackedRecord r;
    } bt;
    struct OP_IdxRowid_stack_vars {
      BtCursor *pCrsr;
      VdbeCursor *pC;
      i64 rowid;
    } bu;
    struct OP_IdxGE_stack_vars {
      VdbeCursor *pC;
      int res;
      UnpackedRecord r;
    } bv;
    struct OP_Destroy_stack_vars {
      int iMoved;
      int iCnt;
      Vdbe *pVdbe;
      int iDb;
    } bw;
    struct OP_Clear_stack_vars {
      int nChange;
    } bx;
    struct OP_CreateTable_stack_vars {
      int pgno;
      int flags;
      Db *pDb;
    } by;
    struct OP_ParseSchema_stack_vars {
      int iDb;
      const char *zMaster;
      char *zSql;
      InitData initData;
    } bz;
    struct OP_IntegrityCk_stack_vars {
      int nRoot;      /* Number of tables to check.  (Number of root pages.) */
      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 */
    } ca;
    struct OP_RowSetRead_stack_vars {
      i64 val;
    } cb;
    struct OP_RowSetTest_stack_vars {
      int iSet;
      int exists;
    } cc;
    struct OP_Program_stack_vars {
      int nMem;               /* Number of memory registers for sub-program */
      int nByte;              /* Bytes of runtime space required for sub-program */
      Mem *pRt;               /* Register to allocate runtime space */
      Mem *pMem;              /* Used to iterate through memory cells */
      Mem *pEnd;              /* Last memory cell in new array */
      VdbeFrame *pFrame;      /* New vdbe frame to execute in */
      SubProgram *pProgram;   /* Sub-program to execute */
      void *t;                /* Token identifying trigger */
    } cd;
    struct OP_Param_stack_vars {
      VdbeFrame *pFrame;
      Mem *pIn;
    } ce;
    struct OP_MemMax_stack_vars {
      Mem *pIn1;
      VdbeFrame *pFrame;
    } cf;
    struct OP_AggStep_stack_vars {
      int n;
      int i;
      Mem *pMem;
      Mem *pRec;
      sqlite3_context ctx;
      sqlite3_value **apVal;
    } cg;
    struct OP_AggFinal_stack_vars {
      Mem *pMem;
    } ch;
    struct OP_Checkpoint_stack_vars {
      int i;                          /* Loop counter */
      int aRes[3];                    /* Results */
      Mem *pMem;                      /* Write results here */
    } ci;
    struct OP_JournalMode_stack_vars {
      Btree *pBt;                     /* Btree to change journal mode of */
      Pager *pPager;                  /* Pager associated with pBt */
      int eNew;                       /* New journal mode */
      int eOld;                       /* The old journal mode */
#ifndef SQLITE_OMIT_WAL
      const char *zFilename;          /* Name of database file for pPager */
#endif
    } cj;
    struct OP_IncrVacuum_stack_vars {
      Btree *pBt;
    } ck;
    struct OP_VBegin_stack_vars {
      VTable *pVTab;
    } cl;
    struct OP_VOpen_stack_vars {
      VdbeCursor *pCur;
      sqlite3_vtab_cursor *pVtabCursor;
      sqlite3_vtab *pVtab;
      sqlite3_module *pModule;
    } cm;
    struct OP_VFilter_stack_vars {
      int nArg;
      int iQuery;
      const sqlite3_module *pModule;
      Mem *pQuery;
      Mem *pArgc;
      sqlite3_vtab_cursor *pVtabCursor;
      sqlite3_vtab *pVtab;
      VdbeCursor *pCur;
      int res;
      int i;
      Mem **apArg;
    } cn;
    struct OP_VColumn_stack_vars {
      sqlite3_vtab *pVtab;
      const sqlite3_module *pModule;
      Mem *pDest;
      sqlite3_context sContext;
    } co;
    struct OP_VNext_stack_vars {
      sqlite3_vtab *pVtab;
      const sqlite3_module *pModule;
      int res;
      VdbeCursor *pCur;
    } cp;
    struct OP_VRename_stack_vars {
      sqlite3_vtab *pVtab;
      Mem *pName;
    } cq;
    struct OP_VUpdate_stack_vars {
      sqlite3_vtab *pVtab;
      sqlite3_module *pModule;
      int nArg;
      int i;
      sqlite_int64 rowid;
      Mem **apArg;
      Mem *pX;
    } cr;
    struct OP_Trace_stack_vars {
      char *zTrace;
      char *z;
    } cs;
  } u;
  /* End automatically generated code
  ********************************************************************/

  assert( p->magic==VDBE_MAGIC_RUN );  /* sqlite3_step() verifies this */
  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;
................................................................................
}

/* Opcode:  Yield P1 * * * *
**
** Swap the program counter with the value in register P1.
*/
case OP_Yield: {            /* in1 */
#if 0  /* local variables moved into u.aa */
  int pcDest;
#endif /* local variables moved into u.aa */
  pIn1 = &aMem[pOp->p1];
  assert( (pIn1->flags & MEM_Dyn)==0 );
  pIn1->flags = MEM_Int;
  u.aa.pcDest = (int)pIn1->u.i;
  pIn1->u.i = pc;
  REGISTER_TRACE(pOp->p1, pIn1);
  pc = u.aa.pcDest;
  break;
}

/* Opcode:  HaltIfNull  P1 P2 P3 P4 P5
** Synopsis:  if r[P3] null then halt
**
** Check the value in register P3.  If it is NULL then Halt using
................................................................................
** omitted.
**
** There is an implied "Halt 0 0 0" instruction inserted at the very end of
** every program.  So a jump past the last instruction of the program
** is the same as executing Halt.
*/
case OP_Halt: {
#if 0  /* local variables moved into u.ab */
  const char *zType;
  const char *zLogFmt;
#endif /* local variables moved into u.ab */

  if( pOp->p1==SQLITE_OK && p->pFrame ){
    /* Halt the sub-program. Return control to the parent frame. */
    VdbeFrame *pFrame = p->pFrame;
    p->pFrame = pFrame->pParent;
    p->nFrame--;
    sqlite3VdbeSetChanges(db, p->nChange);
    pc = sqlite3VdbeFrameRestore(pFrame);
    lastRowid = db->lastRowid;
    if( pOp->p2==OE_Ignore ){
      /* Instruction pc is the OP_Program that invoked the sub-program
      ** currently being halted. If the p2 instruction of this OP_Halt
      ** instruction is set to OE_Ignore, then the sub-program is throwing
      ** an IGNORE exception. In this case jump to the address specified
      ** as the p2 of the calling OP_Program.  */
      pc = p->aOp[pc].p2-1;
    }
    aOp = p->aOp;
................................................................................
      static const char * const azType[] = { "NOT NULL", "UNIQUE", "CHECK",
                                             "FOREIGN KEY" };
      assert( pOp->p5>=1 && pOp->p5<=4 );
      testcase( pOp->p5==1 );
      testcase( pOp->p5==2 );
      testcase( pOp->p5==3 );
      testcase( pOp->p5==4 );
      u.ab.zType = azType[pOp->p5-1];
    }else{
      u.ab.zType = 0;
    }
    assert( u.ab.zType!=0 || pOp->p4.z!=0 );
    u.ab.zLogFmt = "abort at %d in [%s]: %s";
    if( u.ab.zType && pOp->p4.z ){
      sqlite3SetString(&p->zErrMsg, db, "%s constraint failed: %s",
                       u.ab.zType, pOp->p4.z);
    }else if( pOp->p4.z ){
      sqlite3SetString(&p->zErrMsg, db, "%s", pOp->p4.z);
    }else{
      sqlite3SetString(&p->zErrMsg, db, "%s constraint failed", u.ab.zType);
    }
    sqlite3_log(pOp->p1, u.ab.zLogFmt, pc, p->zSql, p->zErrMsg);
  }
  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 );
................................................................................
** set to NULL.
**
** If the P1 value is non-zero, then also set the MEM_Cleared flag so that
** NULL values will not compare equal even if SQLITE_NULLEQ is set on
** OP_Ne or OP_Eq.
*/
case OP_Null: {           /* out2-prerelease */
#if 0  /* local variables moved into u.ac */
  int cnt;
  u16 nullFlag;
#endif /* local variables moved into u.ac */
  u.ac.cnt = pOp->p3-pOp->p2;
  assert( pOp->p3<=(p->nMem-p->nCursor) );
  pOut->flags = u.ac.nullFlag = pOp->p1 ? (MEM_Null|MEM_Cleared) : MEM_Null;
  while( u.ac.cnt>0 ){
    pOut++;
    memAboutToChange(p, pOut);
    VdbeMemRelease(pOut);
    pOut->flags = u.ac.nullFlag;
    u.ac.cnt--;
  }
  break;
}


/* Opcode: Blob P1 P2 * P4
** Synopsis: r[P2]=P4 (len=P1)
................................................................................
**
** Transfer the values of bound parameter P1 into register P2
**
** If the parameter is named, then its name appears in P4 and P3==1.
** The P4 value is used by sqlite3_bind_parameter_name().
*/
case OP_Variable: {            /* out2-prerelease */
#if 0  /* local variables moved into u.ad */
  Mem *pVar;       /* Value being transferred */
#endif /* local variables moved into u.ad */

  assert( pOp->p1>0 && pOp->p1<=p->nVar );
  assert( pOp->p4.z==0 || pOp->p4.z==p->azVar[pOp->p1-1] );
  u.ad.pVar = &p->aVar[pOp->p1 - 1];
  if( sqlite3VdbeMemTooBig(u.ad.pVar) ){
    goto too_big;
  }
  sqlite3VdbeMemShallowCopy(pOut, u.ad.pVar, MEM_Static);
  UPDATE_MAX_BLOBSIZE(pOut);
  break;
}

/* Opcode: Move P1 P2 P3 * *
** Synopsis:  r[P2@P3]=r[P1@P3]
**
** Move the values in register P1..P1+P3 over into
** registers P2..P2+P3.  Registers P1..P1+P3 are
** left holding a NULL.  It is an error for register ranges
** P1..P1+P3 and P2..P2+P3 to overlap.
*/
case OP_Move: {
#if 0  /* local variables moved into u.ae */
  char *zMalloc;   /* Holding variable for allocated memory */
  int n;           /* Number of registers left to copy */
  int p1;          /* Register to copy from */
  int p2;          /* Register to copy to */
#endif /* local variables moved into u.ae */

  u.ae.n = pOp->p3;
  u.ae.p1 = pOp->p1;
  u.ae.p2 = pOp->p2;

  assert( u.ae.n>=0 && u.ae.p1>0 && u.ae.p2>0 );
  assert( u.ae.p1+u.ae.n<=u.ae.p2 || u.ae.p2+u.ae.n<=u.ae.p1 );

  pIn1 = &aMem[u.ae.p1];
  pOut = &aMem[u.ae.p2];
  do{
    assert( pOut<=&aMem[(p->nMem-p->nCursor)] );
    assert( pIn1<=&aMem[(p->nMem-p->nCursor)] );
    assert( memIsValid(pIn1) );
    memAboutToChange(p, pOut);
    u.ae.zMalloc = pOut->zMalloc;
    pOut->zMalloc = 0;
    sqlite3VdbeMemMove(pOut, pIn1);
#ifdef SQLITE_DEBUG
    if( pOut->pScopyFrom>=&aMem[u.ae.p1] && pOut->pScopyFrom<&aMem[u.ae.p1+pOp->p3] ){
      pOut->pScopyFrom += u.ae.p1 - pOp->p2;
    }
#endif
    pIn1->zMalloc = u.ae.zMalloc;
    REGISTER_TRACE(u.ae.p2++, pOut);
    pIn1++;
    pOut++;
  }while( u.ae.n-- );
  break;
}

/* Opcode: Copy P1 P2 P3 * *
** Synopsis: r[P2@P3]=r[P1@P3]
**
** Make a copy of registers P1..P1+P3 into registers P2..P2+P3.
**
** This instruction makes a deep copy of the value.  A duplicate
** is made of any string or blob constant.  See also OP_SCopy.
*/
case OP_Copy: {
#if 0  /* local variables moved into u.af */
  int n;
#endif /* local variables moved into u.af */

  u.af.n = pOp->p3;
  pIn1 = &aMem[pOp->p1];
  pOut = &aMem[pOp->p2];
  assert( pOut!=pIn1 );
  while( 1 ){
    sqlite3VdbeMemShallowCopy(pOut, pIn1, MEM_Ephem);
    Deephemeralize(pOut);
#ifdef SQLITE_DEBUG
    pOut->pScopyFrom = 0;
#endif
    REGISTER_TRACE(pOp->p2+pOp->p3-u.af.n, pOut);
    if( (u.af.n--)==0 ) break;
    pOut++;
    pIn1++;
  }
  break;
}

/* Opcode: SCopy P1 P2 * * *
................................................................................
** The registers P1 through P1+P2-1 contain a single row of
** results. This opcode causes the sqlite3_step() call to terminate
** with an SQLITE_ROW return code and it sets up the sqlite3_stmt
** structure to provide access to the top P1 values as the result
** row.
*/
case OP_ResultRow: {
#if 0  /* local variables moved into u.ag */
  Mem *pMem;
  int i;
#endif /* local variables moved into u.ag */
  assert( p->nResColumn==pOp->p2 );
  assert( pOp->p1>0 );
  assert( pOp->p1+pOp->p2<=(p->nMem-p->nCursor)+1 );

#ifndef SQLITE_OMIT_PROGRESS_CALLBACK
  /* Run the progress counter just before returning.
  */
................................................................................
  ** transaction. It needs to be rolled back.  */
  if( SQLITE_OK!=(rc = sqlite3VdbeCheckFk(p, 0)) ){
    assert( db->flags&SQLITE_CountRows );
    assert( p->usesStmtJournal );
    break;
  }

  /* If the SQLITE_CountRows flag is set in sqlite3.flags mask, then
  ** DML statements invoke this opcode to return the number of rows
  ** modified to the user. This is the only way that a VM that
  ** opens a statement transaction may invoke this opcode.
  **
  ** In case this is such a statement, close any statement transaction
  ** opened by this VM before returning control to the user. This is to
  ** ensure that statement-transactions are always nested, not overlapping.
  ** If the open statement-transaction is not closed here, then the user
................................................................................
  /* Invalidate all ephemeral cursor row caches */
  p->cacheCtr = (p->cacheCtr + 2)|1;

  /* Make sure the results of the current row are \000 terminated
  ** and have an assigned type.  The results are de-ephemeralized as
  ** a side effect.
  */
  u.ag.pMem = p->pResultSet = &aMem[pOp->p1];
  for(u.ag.i=0; u.ag.i<pOp->p2; u.ag.i++){
    assert( memIsValid(&u.ag.pMem[u.ag.i]) );
    Deephemeralize(&u.ag.pMem[u.ag.i]);
    assert( (u.ag.pMem[u.ag.i].flags & MEM_Ephem)==0
            || (u.ag.pMem[u.ag.i].flags & (MEM_Str|MEM_Blob))==0 );
    sqlite3VdbeMemNulTerminate(&u.ag.pMem[u.ag.i]);
    sqlite3VdbeMemStoreType(&u.ag.pMem[u.ag.i]);
    REGISTER_TRACE(pOp->p1+u.ag.i, &u.ag.pMem[u.ag.i]);
  }
  if( db->mallocFailed ) goto no_mem;

  /* Return SQLITE_ROW
  */
  p->pc = pc + 1;
  rc = SQLITE_ROW;
................................................................................
**   P3 = P2 || P1
**
** It is illegal for P1 and P3 to be the same register. Sometimes,
** if P3 is the same register as P2, the implementation is able
** to avoid a memcpy().
*/
case OP_Concat: {           /* same as TK_CONCAT, in1, in2, out3 */
#if 0  /* local variables moved into u.ah */
  i64 nByte;
#endif /* local variables moved into u.ah */

  pIn1 = &aMem[pOp->p1];
  pIn2 = &aMem[pOp->p2];
  pOut = &aMem[pOp->p3];
  assert( pIn1!=pOut );
  if( (pIn1->flags | pIn2->flags) & MEM_Null ){
    sqlite3VdbeMemSetNull(pOut);
    break;
  }
  if( ExpandBlob(pIn1) || ExpandBlob(pIn2) ) goto no_mem;
  Stringify(pIn1, encoding);
  Stringify(pIn2, encoding);
  u.ah.nByte = pIn1->n + pIn2->n;
  if( u.ah.nByte>db->aLimit[SQLITE_LIMIT_LENGTH] ){
    goto too_big;
  }
  MemSetTypeFlag(pOut, MEM_Str);
  if( sqlite3VdbeMemGrow(pOut, (int)u.ah.nByte+2, pOut==pIn2) ){
    goto no_mem;
  }
  if( pOut!=pIn2 ){
    memcpy(pOut->z, pIn2->z, pIn2->n);
  }
  memcpy(&pOut->z[pIn2->n], pIn1->z, pIn1->n);
  pOut->z[u.ah.nByte]=0;
  pOut->z[u.ah.nByte+1] = 0;
  pOut->flags |= MEM_Term;
  pOut->n = (int)u.ah.nByte;
  pOut->enc = encoding;
  UPDATE_MAX_BLOBSIZE(pOut);
  break;
}

/* Opcode: Add P1 P2 P3 * *
** Synopsis:  r[P3]=r[P1]+r[P2]
................................................................................
** If either operand is NULL, the result is NULL.
*/
case OP_Add:                   /* same as TK_PLUS, in1, in2, out3 */
case OP_Subtract:              /* same as TK_MINUS, in1, in2, out3 */
case OP_Multiply:              /* same as TK_STAR, in1, in2, out3 */
case OP_Divide:                /* same as TK_SLASH, in1, in2, out3 */
case OP_Remainder: {           /* same as TK_REM, in1, in2, out3 */
#if 0  /* local variables moved into u.ai */
  char bIntint;   /* Started out as two integer operands */
  int flags;      /* Combined MEM_* flags from both inputs */
  i64 iA;         /* Integer value of left operand */
  i64 iB;         /* Integer value of right operand */
  double rA;      /* Real value of left operand */
  double rB;      /* Real value of right operand */
#endif /* local variables moved into u.ai */

  pIn1 = &aMem[pOp->p1];
  applyNumericAffinity(pIn1);
  pIn2 = &aMem[pOp->p2];
  applyNumericAffinity(pIn2);
  pOut = &aMem[pOp->p3];
  u.ai.flags = pIn1->flags | pIn2->flags;
  if( (u.ai.flags & MEM_Null)!=0 ) goto arithmetic_result_is_null;
  if( (pIn1->flags & pIn2->flags & MEM_Int)==MEM_Int ){
    u.ai.iA = pIn1->u.i;
    u.ai.iB = pIn2->u.i;
    u.ai.bIntint = 1;
    switch( pOp->opcode ){
      case OP_Add:       if( sqlite3AddInt64(&u.ai.iB,u.ai.iA) ) goto fp_math;  break;
      case OP_Subtract:  if( sqlite3SubInt64(&u.ai.iB,u.ai.iA) ) goto fp_math;  break;
      case OP_Multiply:  if( sqlite3MulInt64(&u.ai.iB,u.ai.iA) ) goto fp_math;  break;
      case OP_Divide: {
        if( u.ai.iA==0 ) goto arithmetic_result_is_null;
        if( u.ai.iA==-1 && u.ai.iB==SMALLEST_INT64 ) goto fp_math;
        u.ai.iB /= u.ai.iA;
        break;
      }
      default: {
        if( u.ai.iA==0 ) goto arithmetic_result_is_null;
        if( u.ai.iA==-1 ) u.ai.iA = 1;
        u.ai.iB %= u.ai.iA;
        break;
      }
    }
    pOut->u.i = u.ai.iB;
    MemSetTypeFlag(pOut, MEM_Int);
  }else{
    u.ai.bIntint = 0;
fp_math:
    u.ai.rA = sqlite3VdbeRealValue(pIn1);
    u.ai.rB = sqlite3VdbeRealValue(pIn2);
    switch( pOp->opcode ){
      case OP_Add:         u.ai.rB += u.ai.rA;       break;
      case OP_Subtract:    u.ai.rB -= u.ai.rA;       break;
      case OP_Multiply:    u.ai.rB *= u.ai.rA;       break;
      case OP_Divide: {
        /* (double)0 In case of SQLITE_OMIT_FLOATING_POINT... */
        if( u.ai.rA==(double)0 ) goto arithmetic_result_is_null;
        u.ai.rB /= u.ai.rA;
        break;
      }
      default: {
        u.ai.iA = (i64)u.ai.rA;
        u.ai.iB = (i64)u.ai.rB;
        if( u.ai.iA==0 ) goto arithmetic_result_is_null;
        if( u.ai.iA==-1 ) u.ai.iA = 1;
        u.ai.rB = (double)(u.ai.iB % u.ai.iA);
        break;
      }
    }
#ifdef SQLITE_OMIT_FLOATING_POINT
    pOut->u.i = u.ai.rB;
    MemSetTypeFlag(pOut, MEM_Int);
#else
    if( sqlite3IsNaN(u.ai.rB) ){
      goto arithmetic_result_is_null;
    }
    pOut->r = u.ai.rB;
    MemSetTypeFlag(pOut, MEM_Real);
    if( (u.ai.flags & MEM_Real)==0 && !u.ai.bIntint ){
      sqlite3VdbeIntegerAffinity(pOut);
    }
#endif
  }
  break;

arithmetic_result_is_null:
................................................................................
** whether meta data associated with a user function argument using the
** sqlite3_set_auxdata() API may be safely retained until the next
** invocation of this opcode.
**
** See also: AggStep and AggFinal
*/
case OP_Function: {
#if 0  /* local variables moved into u.aj */
  int i;
  Mem *pArg;
  sqlite3_context ctx;
  sqlite3_value **apVal;
  int n;
#endif /* local variables moved into u.aj */

  u.aj.n = pOp->p5;
  u.aj.apVal = p->apArg;
  assert( u.aj.apVal || u.aj.n==0 );

  assert( pOp->p3>0 && pOp->p3<=(p->nMem-p->nCursor) );
  pOut = &aMem[pOp->p3];
  memAboutToChange(p, pOut);

  assert( u.aj.n==0 || (pOp->p2>0 && pOp->p2+u.aj.n<=(p->nMem-p->nCursor)+1) );
  assert( pOp->p3<pOp->p2 || pOp->p3>=pOp->p2+u.aj.n );
  u.aj.pArg = &aMem[pOp->p2];
  for(u.aj.i=0; u.aj.i<u.aj.n; u.aj.i++, u.aj.pArg++){
    assert( memIsValid(u.aj.pArg) );
    u.aj.apVal[u.aj.i] = u.aj.pArg;
    Deephemeralize(u.aj.pArg);
    sqlite3VdbeMemStoreType(u.aj.pArg);
    REGISTER_TRACE(pOp->p2+u.aj.i, u.aj.pArg);
  }

  assert( pOp->p4type==P4_FUNCDEF );
  u.aj.ctx.pFunc = pOp->p4.pFunc;
  u.aj.ctx.iOp = pc;
  u.aj.ctx.pVdbe = p;

  /* The output cell may already have a buffer allocated. Move
  ** the pointer to u.aj.ctx.s so in case the user-function can use
  ** the already allocated buffer instead of allocating a new one.
  */
  memcpy(&u.aj.ctx.s, pOut, sizeof(Mem));
  pOut->flags = MEM_Null;
  pOut->xDel = 0;
  pOut->zMalloc = 0;
  MemSetTypeFlag(&u.aj.ctx.s, MEM_Null);

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

  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.aj.ctx.s);
    goto no_mem;
  }

  /* If the function returned an error, throw an exception */
  if( u.aj.ctx.fErrorOrAux ){
    if( u.aj.ctx.isError ){
      sqlite3SetString(&p->zErrMsg, db, "%s", sqlite3_value_text(&u.aj.ctx.s));
      rc = u.aj.ctx.isError;
    }
    sqlite3VdbeDeleteAuxData(p, pc, pOp->p1);
  }

  /* Copy the result of the function into register P3 */
  sqlite3VdbeChangeEncoding(&u.aj.ctx.s, encoding);
  assert( pOut->flags==MEM_Null );
  memcpy(pOut, &u.aj.ctx.s, sizeof(Mem));
  if( sqlite3VdbeMemTooBig(pOut) ){
    goto too_big;
  }

#if 0
  /* The app-defined function has done something that as caused this
  ** statement to expire.  (Perhaps the function called sqlite3_exec()
................................................................................
** Store the result in register P3.
** If either input is NULL, the result is NULL.
*/
case OP_BitAnd:                 /* same as TK_BITAND, in1, in2, out3 */
case OP_BitOr:                  /* same as TK_BITOR, in1, in2, out3 */
case OP_ShiftLeft:              /* same as TK_LSHIFT, in1, in2, out3 */
case OP_ShiftRight: {           /* same as TK_RSHIFT, in1, in2, out3 */
#if 0  /* local variables moved into u.ak */
  i64 iA;
  u64 uA;
  i64 iB;
  u8 op;
#endif /* local variables moved into u.ak */

  pIn1 = &aMem[pOp->p1];
  pIn2 = &aMem[pOp->p2];
  pOut = &aMem[pOp->p3];
  if( (pIn1->flags | pIn2->flags) & MEM_Null ){
    sqlite3VdbeMemSetNull(pOut);
    break;
  }
  u.ak.iA = sqlite3VdbeIntValue(pIn2);
  u.ak.iB = sqlite3VdbeIntValue(pIn1);
  u.ak.op = pOp->opcode;
  if( u.ak.op==OP_BitAnd ){
    u.ak.iA &= u.ak.iB;
  }else if( u.ak.op==OP_BitOr ){
    u.ak.iA |= u.ak.iB;
  }else if( u.ak.iB!=0 ){
    assert( u.ak.op==OP_ShiftRight || u.ak.op==OP_ShiftLeft );

    /* If shifting by a negative amount, shift in the other direction */
    if( u.ak.iB<0 ){
      assert( OP_ShiftRight==OP_ShiftLeft+1 );
      u.ak.op = 2*OP_ShiftLeft + 1 - u.ak.op;
      u.ak.iB = u.ak.iB>(-64) ? -u.ak.iB : 64;
    }

    if( u.ak.iB>=64 ){
      u.ak.iA = (u.ak.iA>=0 || u.ak.op==OP_ShiftLeft) ? 0 : -1;
    }else{
      memcpy(&u.ak.uA, &u.ak.iA, sizeof(u.ak.uA));
      if( u.ak.op==OP_ShiftLeft ){
        u.ak.uA <<= u.ak.iB;
      }else{
        u.ak.uA >>= u.ak.iB;
        /* Sign-extend on a right shift of a negative number */
        if( u.ak.iA<0 ) u.ak.uA |= ((((u64)0xffffffff)<<32)|0xffffffff) << (64-u.ak.iB);
      }
      memcpy(&u.ak.iA, &u.ak.uA, sizeof(u.ak.iA));
    }
  }
  pOut->u.i = u.ak.iA;
  MemSetTypeFlag(pOut, MEM_Int);
  break;
}

/* Opcode: AddImm  P1 P2 * * *
** Synopsis:  r[P1]=r[P1]+P2
** 
................................................................................
*/
case OP_Eq:               /* same as TK_EQ, jump, in1, in3 */
case OP_Ne:               /* same as TK_NE, jump, in1, in3 */
case OP_Lt:               /* same as TK_LT, jump, in1, in3 */
case OP_Le:               /* same as TK_LE, jump, in1, in3 */
case OP_Gt:               /* same as TK_GT, jump, in1, in3 */
case OP_Ge: {             /* same as TK_GE, jump, in1, in3 */
#if 0  /* local variables moved into u.al */
  int res;            /* Result of the comparison of pIn1 against pIn3 */
  char affinity;      /* Affinity to use for comparison */
  u16 flags1;         /* Copy of initial value of pIn1->flags */
  u16 flags3;         /* Copy of initial value of pIn3->flags */
#endif /* local variables moved into u.al */

  pIn1 = &aMem[pOp->p1];
  pIn3 = &aMem[pOp->p3];
  u.al.flags1 = pIn1->flags;
  u.al.flags3 = pIn3->flags;
  if( (u.al.flags1 | u.al.flags3)&MEM_Null ){
    /* One or both operands are NULL */
    if( pOp->p5 & SQLITE_NULLEQ ){
      /* If SQLITE_NULLEQ is set (which will only happen if the operator is
      ** OP_Eq or OP_Ne) then take the jump or not depending on whether
      ** or not both operands are null.
      */
      assert( pOp->opcode==OP_Eq || pOp->opcode==OP_Ne );
      assert( (u.al.flags1 & MEM_Cleared)==0 );
      if( (u.al.flags1&MEM_Null)!=0
       && (u.al.flags3&MEM_Null)!=0
       && (u.al.flags3&MEM_Cleared)==0
      ){
        u.al.res = 0;  /* Results are equal */
      }else{
        u.al.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_JUMPIFNULL ){
................................................................................
        MemSetTypeFlag(pOut, MEM_Null);
        REGISTER_TRACE(pOp->p2, pOut);
      }
      break;
    }
  }else{
    /* Neither operand is NULL.  Do a comparison. */
    u.al.affinity = pOp->p5 & SQLITE_AFF_MASK;
    if( u.al.affinity ){
      applyAffinity(pIn1, u.al.affinity, encoding);
      applyAffinity(pIn3, u.al.affinity, encoding);
      if( db->mallocFailed ) goto no_mem;
    }

    assert( pOp->p4type==P4_COLLSEQ || pOp->p4.pColl==0 );
    ExpandBlob(pIn1);
    ExpandBlob(pIn3);
    u.al.res = sqlite3MemCompare(pIn3, pIn1, pOp->p4.pColl);
  }
  switch( pOp->opcode ){
    case OP_Eq:    u.al.res = u.al.res==0;     break;
    case OP_Ne:    u.al.res = u.al.res!=0;     break;
    case OP_Lt:    u.al.res = u.al.res<0;      break;
    case OP_Le:    u.al.res = u.al.res<=0;     break;
    case OP_Gt:    u.al.res = u.al.res>0;      break;
    default:       u.al.res = u.al.res>=0;     break;
  }

  if( pOp->p5 & SQLITE_STOREP2 ){
    pOut = &aMem[pOp->p2];
    memAboutToChange(p, pOut);
    MemSetTypeFlag(pOut, MEM_Int);
    pOut->u.i = u.al.res;
    REGISTER_TRACE(pOp->p2, pOut);
  }else if( u.al.res ){
    pc = pOp->p2-1;
  }

  /* Undo any changes made by applyAffinity() to the input registers. */
  pIn1->flags = (pIn1->flags&~MEM_TypeMask) | (u.al.flags1&MEM_TypeMask);
  pIn3->flags = (pIn3->flags&~MEM_TypeMask) | (u.al.flags3&MEM_TypeMask);
  break;
}

/* Opcode: Permutation * * * P4 *
**
** Set the permutation used by the OP_Compare operator to be the array
** of integers in P4.
................................................................................
** only.  The KeyInfo elements are used sequentially.
**
** The comparison is a sort comparison, so NULLs compare equal,
** NULLs are less than numbers, numbers are less than strings,
** and strings are less than blobs.
*/
case OP_Compare: {
#if 0  /* local variables moved into u.am */
  int n;
  int i;
  int p1;
  int p2;
  const KeyInfo *pKeyInfo;
  int idx;
  CollSeq *pColl;    /* Collating sequence to use on this term */
  int bRev;          /* True for DESCENDING sort order */
#endif /* local variables moved into u.am */

  if( (pOp->p5 & OPFLAG_PERMUTE)==0 ) aPermute = 0;
  u.am.n = pOp->p3;
  u.am.pKeyInfo = pOp->p4.pKeyInfo;
  assert( u.am.n>0 );
  assert( u.am.pKeyInfo!=0 );
  u.am.p1 = pOp->p1;
  u.am.p2 = pOp->p2;
#if SQLITE_DEBUG
  if( aPermute ){
    int k, mx = 0;
    for(k=0; k<u.am.n; k++) if( aPermute[k]>mx ) mx = aPermute[k];
    assert( u.am.p1>0 && u.am.p1+mx<=(p->nMem-p->nCursor)+1 );
    assert( u.am.p2>0 && u.am.p2+mx<=(p->nMem-p->nCursor)+1 );
  }else{
    assert( u.am.p1>0 && u.am.p1+u.am.n<=(p->nMem-p->nCursor)+1 );
    assert( u.am.p2>0 && u.am.p2+u.am.n<=(p->nMem-p->nCursor)+1 );
  }
#endif /* SQLITE_DEBUG */
  for(u.am.i=0; u.am.i<u.am.n; u.am.i++){
    u.am.idx = aPermute ? aPermute[u.am.i] : u.am.i;
    assert( memIsValid(&aMem[u.am.p1+u.am.idx]) );
    assert( memIsValid(&aMem[u.am.p2+u.am.idx]) );
    REGISTER_TRACE(u.am.p1+u.am.idx, &aMem[u.am.p1+u.am.idx]);
    REGISTER_TRACE(u.am.p2+u.am.idx, &aMem[u.am.p2+u.am.idx]);
    assert( u.am.i<u.am.pKeyInfo->nField );
    u.am.pColl = u.am.pKeyInfo->aColl[u.am.i];
    u.am.bRev = u.am.pKeyInfo->aSortOrder[u.am.i];
    iCompare = sqlite3MemCompare(&aMem[u.am.p1+u.am.idx], &aMem[u.am.p2+u.am.idx], u.am.pColl);
    if( iCompare ){
      if( u.am.bRev ) iCompare = -iCompare;
      break;
    }
  }
  aPermute = 0;
  break;
}

................................................................................
**
** If either P1 or P2 is nonzero (true) then the result is 1 (true)
** even if the other input is NULL.  A NULL and false or two NULLs
** give a NULL output.
*/
case OP_And:              /* same as TK_AND, in1, in2, out3 */
case OP_Or: {             /* same as TK_OR, in1, in2, out3 */
#if 0  /* local variables moved into u.an */
  int v1;    /* Left operand:  0==FALSE, 1==TRUE, 2==UNKNOWN or NULL */
  int v2;    /* Right operand: 0==FALSE, 1==TRUE, 2==UNKNOWN or NULL */
#endif /* local variables moved into u.an */

  pIn1 = &aMem[pOp->p1];
  if( pIn1->flags & MEM_Null ){
    u.an.v1 = 2;
  }else{
    u.an.v1 = sqlite3VdbeIntValue(pIn1)!=0;
  }
  pIn2 = &aMem[pOp->p2];
  if( pIn2->flags & MEM_Null ){
    u.an.v2 = 2;
  }else{
    u.an.v2 = sqlite3VdbeIntValue(pIn2)!=0;
  }
  if( pOp->opcode==OP_And ){
    static const unsigned char and_logic[] = { 0, 0, 0, 0, 1, 2, 0, 2, 2 };
    u.an.v1 = and_logic[u.an.v1*3+u.an.v2];
  }else{
    static const unsigned char or_logic[] = { 0, 1, 2, 1, 1, 1, 2, 1, 2 };
    u.an.v1 = or_logic[u.an.v1*3+u.an.v2];
  }
  pOut = &aMem[pOp->p3];
  if( u.an.v1==2 ){
    MemSetTypeFlag(pOut, MEM_Null);
  }else{
    pOut->u.i = u.an.v1;
    MemSetTypeFlag(pOut, MEM_Int);
  }
  break;
}

/* Opcode: Not P1 P2 * * *
** Synopsis: r[P2]= !r[P1]
................................................................................
**
** Jump to P2 if the value in register P1 is False.  The value
** is considered false if it has a numeric value of zero.  If the value
** in P1 is NULL then take the jump if P3 is zero.
*/
case OP_If:                 /* jump, in1 */
case OP_IfNot: {            /* jump, in1 */
#if 0  /* local variables moved into u.ao */
  int c;
#endif /* local variables moved into u.ao */
  pIn1 = &aMem[pOp->p1];
  if( pIn1->flags & MEM_Null ){
    u.ao.c = pOp->p3;
  }else{
#ifdef SQLITE_OMIT_FLOATING_POINT
    u.ao.c = sqlite3VdbeIntValue(pIn1)!=0;
#else
    u.ao.c = sqlite3VdbeRealValue(pIn1)!=0.0;
#endif
    if( pOp->opcode==OP_IfNot ) u.ao.c = !u.ao.c;
  }
  if( u.ao.c ){
    pc = pOp->p2-1;
  }
  break;
}

/* Opcode: IsNull P1 P2 * * *
** Synopsis:  if r[P1]==NULL goto P2
................................................................................
**
** If the OPFLAG_LENGTHARG and OPFLAG_TYPEOFARG bits are set on P5 when
** the result is guaranteed to only be used as the argument of a length()
** or typeof() function, respectively.  The loading of large blobs can be
** skipped for length() and all content loading can be skipped for typeof().
*/
case OP_Column: {
#if 0  /* local variables moved into u.ap */
  i64 payloadSize64; /* Number of bytes in the record */
  int p2;            /* column number to retrieve */
  VdbeCursor *pC;    /* The VDBE cursor */
  BtCursor *pCrsr;   /* The BTree cursor */
  u32 *aType;        /* aType[i] holds the numeric type of the i-th column */
  u32 *aOffset;      /* aOffset[i] is offset to start of data for i-th column */
  int len;           /* The length of the serialized data for the column */
................................................................................
  const u8 *zHdr;    /* Next unparsed byte of the header */
  const u8 *zEndHdr; /* Pointer to first byte after the header */
  u32 offset;        /* Offset into the data */
  u32 szField;       /* Number of bytes in the content of a field */
  u32 avail;         /* Number of bytes of available data */
  u32 t;             /* A type code from the record header */
  Mem *pReg;         /* PseudoTable input register */
#endif /* local variables moved into u.ap */

  u.ap.p2 = pOp->p2;
  assert( pOp->p3>0 && pOp->p3<=(p->nMem-p->nCursor) );
  u.ap.pDest = &aMem[pOp->p3];
  memAboutToChange(p, u.ap.pDest);
  assert( pOp->p1>=0 && pOp->p1<p->nCursor );
  u.ap.pC = p->apCsr[pOp->p1];
  assert( u.ap.pC!=0 );
  assert( u.ap.p2<u.ap.pC->nField );

  u.ap.aType = u.ap.pC->aType;
  u.ap.aOffset = u.ap.aType + u.ap.pC->nField;
#ifndef SQLITE_OMIT_VIRTUALTABLE
  assert( u.ap.pC->pVtabCursor==0 ); /* OP_Column never called on virtual table */
#endif
  u.ap.pCrsr = u.ap.pC->pCursor;

  assert( u.ap.pCrsr!=0 || u.ap.pC->pseudoTableReg>0 ); /* u.ap.pCrsr NULL on PseudoTables */
  assert( u.ap.pCrsr!=0 || u.ap.pC->nullRow );          /* u.ap.pC->nullRow on PseudoTables */

  /* If the cursor cache is stale, bring it up-to-date */
  rc = sqlite3VdbeCursorMoveto(u.ap.pC);
  if( rc ) goto abort_due_to_error;
  if( u.ap.pC->cacheStatus!=p->cacheCtr || (pOp->p5&OPFLAG_CLEARCACHE)!=0 ){
    if( u.ap.pC->nullRow ){
      if( u.ap.pCrsr==0 ){
        assert( u.ap.pC->pseudoTableReg>0 );
        u.ap.pReg = &aMem[u.ap.pC->pseudoTableReg];
        if( u.ap.pC->multiPseudo ){
          sqlite3VdbeMemShallowCopy(u.ap.pDest, u.ap.pReg+u.ap.p2, MEM_Ephem);
          Deephemeralize(u.ap.pDest);
          goto op_column_out;
        }
        assert( u.ap.pReg->flags & MEM_Blob );
        assert( memIsValid(u.ap.pReg) );
        u.ap.pC->payloadSize = u.ap.pC->szRow = u.ap.avail = u.ap.pReg->n;

        u.ap.pC->aRow = (u8*)u.ap.pReg->z;
      }else{
        MemSetTypeFlag(u.ap.pDest, MEM_Null);
        goto op_column_out;
      }
    }else{
      assert( u.ap.pCrsr );
      if( u.ap.pC->isTable==0 ){
        assert( sqlite3BtreeCursorIsValid(u.ap.pCrsr) );
        VVA_ONLY(rc =) sqlite3BtreeKeySize(u.ap.pCrsr, &u.ap.payloadSize64);
        assert( rc==SQLITE_OK ); /* True because of CursorMoveto() call above */
        /* sqlite3BtreeParseCellPtr() uses getVarint32() to extract the
        ** payload size, so it is impossible for u.ap.payloadSize64 to be
        ** larger than 32 bits. */
        assert( (u.ap.payloadSize64 & SQLITE_MAX_U32)==(u64)u.ap.payloadSize64 );
        u.ap.pC->aRow = sqlite3BtreeKeyFetch(u.ap.pCrsr, &u.ap.avail);
        u.ap.pC->payloadSize = (u32)u.ap.payloadSize64;
      }else{
        assert( sqlite3BtreeCursorIsValid(u.ap.pCrsr) );
        VVA_ONLY(rc =) sqlite3BtreeDataSize(u.ap.pCrsr, &u.ap.pC->payloadSize);
        assert( rc==SQLITE_OK );   /* DataSize() cannot fail */
        u.ap.pC->aRow = sqlite3BtreeDataFetch(u.ap.pCrsr, &u.ap.avail);
      }
      assert( u.ap.avail<=65536 );  /* Maximum page size is 64KiB */
      if( u.ap.pC->payloadSize <= (u32)u.ap.avail ){
        u.ap.pC->szRow = u.ap.pC->payloadSize;
      }else{
        u.ap.pC->szRow = u.ap.avail;
      }
      if( u.ap.pC->payloadSize > (u32)db->aLimit[SQLITE_LIMIT_LENGTH] ){
        goto too_big;
      }
    }
    u.ap.pC->cacheStatus = p->cacheCtr;
    u.ap.pC->iHdrOffset = getVarint32(u.ap.pC->aRow, u.ap.offset);
    u.ap.pC->nHdrParsed = 0;
    u.ap.aOffset[0] = u.ap.offset;
    if( u.ap.avail<u.ap.offset ){
      /* u.ap.pC->aRow does not have to hold the entire row, but it does at least
      ** need to cover the header of the record.  If u.ap.pC->aRow does not contain
      ** the complete header, then set it to zero, forcing the header to be
      ** dynamically allocated. */
      u.ap.pC->aRow = 0;
      u.ap.pC->szRow = 0;
    }

    /* Make sure a corrupt database has not given us an oversize header.
    ** Do this now to avoid an oversize memory allocation.
    **
    ** Type entries can be between 1 and 5 bytes each.  But 4 and 5 byte
    ** types use so much data space that there can only be 4096 and 32 of
    ** them, respectively.  So the maximum header length results from a
    ** 3-byte type for each of the maximum of 32768 columns plus three
    ** extra bytes for the header length itself.  32768*3 + 3 = 98307.
    */
    if( u.ap.offset > 98307 || u.ap.offset > u.ap.pC->payloadSize ){
      rc = SQLITE_CORRUPT_BKPT;
      goto op_column_error;
    }
  }

  /* Make sure at least the first u.ap.p2+1 entries of the header have been
  ** parsed and valid information is in u.ap.aOffset[] and u.ap.aType[].
  */
  if( u.ap.pC->nHdrParsed<=u.ap.p2 ){
    /* If there is more header available for parsing in the record, try
    ** to extract additional fields up through the u.ap.p2+1-th field
    */
    if( u.ap.pC->iHdrOffset<u.ap.aOffset[0] ){
      /* Make sure u.ap.zData points to enough of the record to cover the header. */
      if( u.ap.pC->aRow==0 ){
        memset(&u.ap.sMem, 0, sizeof(u.ap.sMem));
        rc = sqlite3VdbeMemFromBtree(u.ap.pCrsr, 0, u.ap.aOffset[0],
                                     !u.ap.pC->isTable, &u.ap.sMem);
        if( rc!=SQLITE_OK ){
          goto op_column_error;
        }
        u.ap.zData = (u8*)u.ap.sMem.z;
      }else{
        u.ap.zData = u.ap.pC->aRow;
      }

      /* Fill in u.ap.aType[u.ap.i] and u.ap.aOffset[u.ap.i] values through the u.ap.p2-th field. */
      u.ap.i = u.ap.pC->nHdrParsed;
      u.ap.offset = u.ap.aOffset[u.ap.i];
      u.ap.zHdr = u.ap.zData + u.ap.pC->iHdrOffset;
      u.ap.zEndHdr = u.ap.zData + u.ap.aOffset[0];
      assert( u.ap.i<=u.ap.p2 && u.ap.zHdr<u.ap.zEndHdr );
      do{
        if( u.ap.zHdr[0]<0x80 ){
          u.ap.t = u.ap.zHdr[0];
          u.ap.zHdr++;
        }else{
          u.ap.zHdr += sqlite3GetVarint32(u.ap.zHdr, &u.ap.t);
        }
        u.ap.aType[u.ap.i] = u.ap.t;
        u.ap.szField = sqlite3VdbeSerialTypeLen(u.ap.t);
        u.ap.offset += u.ap.szField;
        if( u.ap.offset<u.ap.szField ){  /* True if u.ap.offset overflows */
          u.ap.zHdr = &u.ap.zEndHdr[1];  /* Forces SQLITE_CORRUPT return below */
          break;
        }
        u.ap.i++;
        u.ap.aOffset[u.ap.i] = u.ap.offset;
      }while( u.ap.i<=u.ap.p2 && u.ap.zHdr<u.ap.zEndHdr );
      u.ap.pC->nHdrParsed = u.ap.i;
      u.ap.pC->iHdrOffset = (u32)(u.ap.zHdr - u.ap.zData);
      if( u.ap.pC->aRow==0 ){
        sqlite3VdbeMemRelease(&u.ap.sMem);
        u.ap.sMem.flags = MEM_Null;
      }

      /* If we have read more header data than was contained in the header,
      ** or if the end of the last field appears to be past the end of the
      ** record, or if the end of the last field appears to be before the end
      ** of the record (when all fields present), then we must be dealing
      ** with a corrupt database.
      */
      if( (u.ap.zHdr > u.ap.zEndHdr)
       || (u.ap.offset > u.ap.pC->payloadSize)
       || (u.ap.zHdr==u.ap.zEndHdr && u.ap.offset!=u.ap.pC->payloadSize)
      ){
        rc = SQLITE_CORRUPT_BKPT;
        goto op_column_error;
      }
    }

    /* If after trying to extra new entries from the header, nHdrParsed is
    ** still not up to u.ap.p2, that means that the record has fewer than u.ap.p2
    ** columns.  So the result will be either the default value or a NULL.
    */
    if( u.ap.pC->nHdrParsed<=u.ap.p2 ){
      if( pOp->p4type==P4_MEM ){
        sqlite3VdbeMemShallowCopy(u.ap.pDest, pOp->p4.pMem, MEM_Static);
      }else{
        MemSetTypeFlag(u.ap.pDest, MEM_Null);
      }
      goto op_column_out;
    }
  }

  /* Extract the content for the u.ap.p2+1-th column.  Control can only
  ** reach this point if u.ap.aOffset[u.ap.p2], u.ap.aOffset[u.ap.p2+1], and u.ap.aType[u.ap.p2] are
  ** all valid.
  */
  assert( u.ap.p2<u.ap.pC->nHdrParsed );
  assert( rc==SQLITE_OK );
  if( u.ap.pC->szRow>=u.ap.aOffset[u.ap.p2+1] ){
    /* This is the common case where the desired content fits on the original
    ** page - where the content is not on an overflow page */
    VdbeMemRelease(u.ap.pDest);
    sqlite3VdbeSerialGet(u.ap.pC->aRow+u.ap.aOffset[u.ap.p2], u.ap.aType[u.ap.p2], u.ap.pDest);
  }else{
    /* This branch happens only when content is on overflow pages */
    u.ap.t = u.ap.aType[u.ap.p2];
    if( ((pOp->p5 & (OPFLAG_LENGTHARG|OPFLAG_TYPEOFARG))!=0
          && ((u.ap.t>=12 && (u.ap.t&1)==0) || (pOp->p5 & OPFLAG_TYPEOFARG)!=0))
     || (u.ap.len = sqlite3VdbeSerialTypeLen(u.ap.t))==0
    ){
      /* Content is irrelevant for the typeof() function and for
      ** the length(X) function if X is a blob.  So we might as well use
      ** bogus content rather than reading content from disk.  NULL works
      ** for text and blob and whatever is in the u.ap.payloadSize64 variable
      ** will work for everything else.  Content is also irrelevant if
      ** the content length is 0. */
      u.ap.zData = u.ap.t<=13 ? (u8*)&u.ap.payloadSize64 : 0;
      u.ap.sMem.zMalloc = 0;
    }else{
      memset(&u.ap.sMem, 0, sizeof(u.ap.sMem));
      sqlite3VdbeMemMove(&u.ap.sMem, u.ap.pDest);
      rc = sqlite3VdbeMemFromBtree(u.ap.pCrsr, u.ap.aOffset[u.ap.p2], u.ap.len, !u.ap.pC->isTable,
                                   &u.ap.sMem);
      if( rc!=SQLITE_OK ){
        goto op_column_error;
      }
      u.ap.zData = (u8*)u.ap.sMem.z;
    }
    sqlite3VdbeSerialGet(u.ap.zData, u.ap.t, u.ap.pDest);
    /* If we dynamically allocated space to hold the data (in the
    ** sqlite3VdbeMemFromBtree() call above) then transfer control of that
    ** dynamically allocated space over to the u.ap.pDest structure.
    ** This prevents a memory copy. */
    if( u.ap.sMem.zMalloc ){
      assert( u.ap.sMem.z==u.ap.sMem.zMalloc );
      assert( !(u.ap.pDest->flags & MEM_Dyn) );
      assert( !(u.ap.pDest->flags & (MEM_Blob|MEM_Str)) || u.ap.pDest->z==u.ap.sMem.z );
      u.ap.pDest->flags &= ~(MEM_Ephem|MEM_Static);
      u.ap.pDest->flags |= MEM_Term;
      u.ap.pDest->z = u.ap.sMem.z;
      u.ap.pDest->zMalloc = u.ap.sMem.zMalloc;
    }
  }
  u.ap.pDest->enc = encoding;

op_column_out:
  rc = sqlite3VdbeMemMakeWriteable(u.ap.pDest);
op_column_error:
  UPDATE_MAX_BLOBSIZE(u.ap.pDest);
  REGISTER_TRACE(pOp->p3, u.ap.pDest);
  break;
}

/* Opcode: Affinity P1 P2 * P4 *
** Synopsis: affinity(r[P1@P2])
**
** Apply affinities to a range of P2 registers starting with P1.
**
** P4 is a string that is P2 characters long. The nth character of the
** string indicates the column affinity that should be used for the nth
** memory cell in the range.
*/
case OP_Affinity: {
#if 0  /* local variables moved into u.aq */
  const char *zAffinity;   /* The affinity to be applied */
  char cAff;               /* A single character of affinity */
#endif /* local variables moved into u.aq */

  u.aq.zAffinity = pOp->p4.z;
  assert( u.aq.zAffinity!=0 );
  assert( u.aq.zAffinity[pOp->p2]==0 );
  pIn1 = &aMem[pOp->p1];
  while( (u.aq.cAff = *(u.aq.zAffinity++))!=0 ){
    assert( pIn1 <= &p->aMem[(p->nMem-p->nCursor)] );
    assert( memIsValid(pIn1) );
    ExpandBlob(pIn1);
    applyAffinity(pIn1, u.aq.cAff, encoding);
    pIn1++;
  }
  break;
}

/* Opcode: MakeRecord P1 P2 P3 P4 *
** Synopsis: r[P3]=mkrec(r[P1@P2])
................................................................................
**
** The mapping from character to affinity is given by the SQLITE_AFF_
** macros defined in sqliteInt.h.
**
** If P4 is NULL then all index fields have the affinity NONE.
*/
case OP_MakeRecord: {
#if 0  /* local variables moved into u.ar */
  u8 *zNewRecord;        /* A buffer to hold the data for the new record */
  Mem *pRec;             /* The new record */
  u64 nData;             /* Number of bytes of data space */
  int nHdr;              /* Number of bytes of header space */
  i64 nByte;             /* Data space required for this record */
  int nZero;             /* Number of zero bytes at the end of the record */
  int nVarint;           /* Number of bytes in a varint */
  u32 serial_type;       /* Type field */
  Mem *pData0;           /* First field to be combined into the record */
  Mem *pLast;            /* Last field of the record */
  int nField;            /* Number of fields in the record */
  char *zAffinity;       /* The affinity string for the record */
  int file_format;       /* File format to use for encoding */
  int i;                 /* Space used in zNewRecord[] */

  int len;               /* Length of a field */
#endif /* local variables moved into u.ar */

  /* Assuming the record contains N fields, the record format looks
  ** like this:
  **
  ** ------------------------------------------------------------------------
  ** | hdr-size | type 0 | type 1 | ... | type N-1 | data0 | ... | data N-1 |
  ** ------------------------------------------------------------------------
  **
  ** Data(0) is taken from register P1.  Data(1) comes from register P1+1
  ** and so froth.
  **
  ** Each type field is a varint representing the serial type of the
  ** corresponding data element (see sqlite3VdbeSerialType()). The
  ** hdr-size field is also a varint which is the offset from the beginning
  ** of the record to data0.
  */
  u.ar.nData = 0;         /* Number of bytes of data space */
  u.ar.nHdr = 0;          /* Number of bytes of header space */
  u.ar.nZero = 0;         /* Number of zero bytes at the end of the record */
  u.ar.nField = pOp->p1;
  u.ar.zAffinity = pOp->p4.z;
  assert( u.ar.nField>0 && pOp->p2>0 && pOp->p2+u.ar.nField<=(p->nMem-p->nCursor)+1 );
  u.ar.pData0 = &aMem[u.ar.nField];
  u.ar.nField = pOp->p2;
  u.ar.pLast = &u.ar.pData0[u.ar.nField-1];
  u.ar.file_format = p->minWriteFileFormat;

  /* Identify the output register */
  assert( pOp->p3<pOp->p1 || pOp->p3>=pOp->p1+pOp->p2 );
  pOut = &aMem[pOp->p3];
  memAboutToChange(p, pOut);











  /* Loop through the elements that will make up the record to figure
  ** out how much space is required for the new record.
  */
  for(u.ar.pRec=u.ar.pData0; u.ar.pRec<=u.ar.pLast; u.ar.pRec++){
    assert( memIsValid(u.ar.pRec) );
    if( u.ar.zAffinity ){
      applyAffinity(u.ar.pRec, u.ar.zAffinity[u.ar.pRec-u.ar.pData0], encoding);
    }
    if( u.ar.pRec->flags&MEM_Zero && u.ar.pRec->n>0 ){
      sqlite3VdbeMemExpandBlob(u.ar.pRec);
    }
    u.ar.serial_type = sqlite3VdbeSerialType(u.ar.pRec, u.ar.file_format);
    u.ar.len = sqlite3VdbeSerialTypeLen(u.ar.serial_type);
    u.ar.nData += u.ar.len;
    u.ar.nHdr += sqlite3VarintLen(u.ar.serial_type);
    if( u.ar.pRec->flags & MEM_Zero ){
      /* Only pure zero-filled BLOBs can be input to this Opcode.
      ** We do not allow blobs with a prefix and a zero-filled tail. */
      u.ar.nZero += u.ar.pRec->u.nZero;
    }else if( u.ar.len ){
      u.ar.nZero = 0;
    }
  }

  /* Add the initial header varint and total the size */
  u.ar.nHdr += u.ar.nVarint = sqlite3VarintLen(u.ar.nHdr);
  if( u.ar.nVarint<sqlite3VarintLen(u.ar.nHdr) ){
    u.ar.nHdr++;
  }
  u.ar.nByte = u.ar.nHdr+u.ar.nData-u.ar.nZero;
  if( u.ar.nByte>db->aLimit[SQLITE_LIMIT_LENGTH] ){





    goto too_big;
  }

  /* Make sure the output register has a buffer large enough to store
  ** the new record. The output register (pOp->p3) is not allowed to
  ** be one of the input registers (because the following call to
  ** sqlite3VdbeMemGrow() could clobber the value before it is used).
  */
  if( sqlite3VdbeMemGrow(pOut, (int)u.ar.nByte, 0) ){
    goto no_mem;
  }
  u.ar.zNewRecord = (u8 *)pOut->z;

  /* Write the record */
  u.ar.i = putVarint32(u.ar.zNewRecord, u.ar.nHdr);
  for(u.ar.pRec=u.ar.pData0; u.ar.pRec<=u.ar.pLast; u.ar.pRec++){



    u.ar.serial_type = sqlite3VdbeSerialType(u.ar.pRec, u.ar.file_format);
    u.ar.i += putVarint32(&u.ar.zNewRecord[u.ar.i], u.ar.serial_type);      /* serial type */
  }
  for(u.ar.pRec=u.ar.pData0; u.ar.pRec<=u.ar.pLast; u.ar.pRec++){  /* serial data */
    u.ar.i += sqlite3VdbeSerialPut(&u.ar.zNewRecord[u.ar.i], (int)(u.ar.nByte-u.ar.i), u.ar.pRec,u.ar.file_format);
  }

  assert( u.ar.i==u.ar.nByte );



  assert( pOp->p3>0 && pOp->p3<=(p->nMem-p->nCursor) );
  pOut->n = (int)u.ar.nByte;
  pOut->flags = MEM_Blob | MEM_Dyn;
  pOut->xDel = 0;
  if( u.ar.nZero ){
    pOut->u.nZero = u.ar.nZero;
    pOut->flags |= MEM_Zero;
  }
  pOut->enc = SQLITE_UTF8;  /* In case the blob is ever converted to text */
  REGISTER_TRACE(pOp->p3, pOut);
  UPDATE_MAX_BLOBSIZE(pOut);
  break;
}
................................................................................
** Synopsis: r[P2]=count()
**
** Store the number of entries (an integer value) in the table or index 
** opened by cursor P1 in register P2
*/
#ifndef SQLITE_OMIT_BTREECOUNT
case OP_Count: {         /* out2-prerelease */
#if 0  /* local variables moved into u.as */
  i64 nEntry;
  BtCursor *pCrsr;
#endif /* local variables moved into u.as */

  u.as.pCrsr = p->apCsr[pOp->p1]->pCursor;
  assert( u.as.pCrsr );

  rc = sqlite3BtreeCount(u.as.pCrsr, &u.as.nEntry);
  pOut->u.i = u.as.nEntry;
  break;
}
#endif

/* Opcode: Savepoint P1 * * P4 *
**
** Open, release or rollback the savepoint named by parameter P4, depending
** on the value of P1. To open a new savepoint, P1==0. To release (commit) an
** existing savepoint, P1==1, or to rollback an existing savepoint P1==2.
*/
case OP_Savepoint: {
#if 0  /* local variables moved into u.at */
  int p1;                         /* Value of P1 operand */
  char *zName;                    /* Name of savepoint */
  int nName;
  Savepoint *pNew;
  Savepoint *pSavepoint;
  Savepoint *pTmp;
  int iSavepoint;
  int ii;
#endif /* local variables moved into u.at */

  u.at.p1 = pOp->p1;
  u.at.zName = pOp->p4.z;

  /* Assert that the u.at.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.at.p1==SAVEPOINT_BEGIN||u.at.p1==SAVEPOINT_RELEASE||u.at.p1==SAVEPOINT_ROLLBACK );

  assert( db->pSavepoint || db->isTransactionSavepoint==0 );
  assert( checkSavepointCount(db) );
  assert( p->bIsReader );

  if( u.at.p1==SAVEPOINT_BEGIN ){
    if( db->nVdbeWrite>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{
      u.at.nName = sqlite3Strlen30(u.at.zName);

#ifndef SQLITE_OMIT_VIRTUALTABLE
      /* This call is Ok even if this savepoint is actually a transaction
      ** savepoint (and therefore should not prompt xSavepoint()) callbacks.
      ** If this is a transaction savepoint being opened, it is guaranteed
      ** that the db->aVTrans[] array is empty.  */
      assert( db->autoCommit==0 || db->nVTrans==0 );
      rc = sqlite3VtabSavepoint(db, SAVEPOINT_BEGIN,
                                db->nStatement+db->nSavepoint);
      if( rc!=SQLITE_OK ) goto abort_due_to_error;
#endif

      /* Create a new savepoint structure. */
      u.at.pNew = sqlite3DbMallocRaw(db, sizeof(Savepoint)+u.at.nName+1);
      if( u.at.pNew ){
        u.at.pNew->zName = (char *)&u.at.pNew[1];
        memcpy(u.at.pNew->zName, u.at.zName, u.at.nName+1);

        /* If there is no open transaction, then mark this as a special
        ** "transaction savepoint". */
        if( db->autoCommit ){
          db->autoCommit = 0;
          db->isTransactionSavepoint = 1;
        }else{
          db->nSavepoint++;
        }

        /* Link the new savepoint into the database handle's list. */
        u.at.pNew->pNext = db->pSavepoint;
        db->pSavepoint = u.at.pNew;
        u.at.pNew->nDeferredCons = db->nDeferredCons;
        u.at.pNew->nDeferredImmCons = db->nDeferredImmCons;
      }
    }
  }else{
    u.at.iSavepoint = 0;

    /* Find the named savepoint. If there is no such savepoint, then an
    ** an error is returned to the user.  */
    for(
      u.at.pSavepoint = db->pSavepoint;
      u.at.pSavepoint && sqlite3StrICmp(u.at.pSavepoint->zName, u.at.zName);
      u.at.pSavepoint = u.at.pSavepoint->pNext
    ){
      u.at.iSavepoint++;
    }
    if( !u.at.pSavepoint ){
      sqlite3SetString(&p->zErrMsg, db, "no such savepoint: %s", u.at.zName);
      rc = SQLITE_ERROR;
    }else if( db->nVdbeWrite>0 && u.at.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;
    }else{

      /* Determine whether or not this is a transaction savepoint. If so,
      ** and this is a RELEASE command, then the current transaction
      ** is committed.
      */
      int isTransaction = u.at.pSavepoint->pNext==0 && db->isTransactionSavepoint;
      if( isTransaction && u.at.p1==SAVEPOINT_RELEASE ){
        if( (rc = sqlite3VdbeCheckFk(p, 1))!=SQLITE_OK ){
          goto vdbe_return;
        }
        db->autoCommit = 1;
        if( sqlite3VdbeHalt(p)==SQLITE_BUSY ){
          p->pc = pc;
          db->autoCommit = 0;
          p->rc = rc = SQLITE_BUSY;
          goto vdbe_return;
        }
        db->isTransactionSavepoint = 0;
        rc = p->rc;
      }else{
        u.at.iSavepoint = db->nSavepoint - u.at.iSavepoint - 1;
        if( u.at.p1==SAVEPOINT_ROLLBACK ){
          for(u.at.ii=0; u.at.ii<db->nDb; u.at.ii++){
            sqlite3BtreeTripAllCursors(db->aDb[u.at.ii].pBt, SQLITE_ABORT);
          }
        }
        for(u.at.ii=0; u.at.ii<db->nDb; u.at.ii++){
          rc = sqlite3BtreeSavepoint(db->aDb[u.at.ii].pBt, u.at.p1, u.at.iSavepoint);
          if( rc!=SQLITE_OK ){
            goto abort_due_to_error;
          }
        }
        if( u.at.p1==SAVEPOINT_ROLLBACK && (db->flags&SQLITE_InternChanges)!=0 ){
          sqlite3ExpirePreparedStatements(db);
          sqlite3ResetAllSchemasOfConnection(db);
          db->flags = (db->flags | SQLITE_InternChanges);
        }
      }

      /* Regardless of whether this is a RELEASE or ROLLBACK, destroy all
      ** savepoints nested inside of the savepoint being operated on. */
      while( db->pSavepoint!=u.at.pSavepoint ){
        u.at.pTmp = db->pSavepoint;
        db->pSavepoint = u.at.pTmp->pNext;
        sqlite3DbFree(db, u.at.pTmp);
        db->nSavepoint--;
      }

      /* If it is a RELEASE, then destroy the savepoint being operated on
      ** too. If it is a ROLLBACK TO, then set the number of deferred
      ** constraint violations present in the database to the value stored
      ** when the savepoint was created.  */
      if( u.at.p1==SAVEPOINT_RELEASE ){
        assert( u.at.pSavepoint==db->pSavepoint );
        db->pSavepoint = u.at.pSavepoint->pNext;
        sqlite3DbFree(db, u.at.pSavepoint);
        if( !isTransaction ){
          db->nSavepoint--;
        }
      }else{
        db->nDeferredCons = u.at.pSavepoint->nDeferredCons;
        db->nDeferredImmCons = u.at.pSavepoint->nDeferredImmCons;
      }

      if( !isTransaction ){
        rc = sqlite3VtabSavepoint(db, u.at.p1, u.at.iSavepoint);
        if( rc!=SQLITE_OK ) goto abort_due_to_error;
      }
    }
  }

  break;
}
................................................................................
** back any currently active btree transactions. If there are any active
** VMs (apart from this one), then a ROLLBACK fails.  A COMMIT fails if
** there are active writing VMs or active VMs that use shared cache.
**
** This instruction causes the VM to halt.
*/
case OP_AutoCommit: {
#if 0  /* local variables moved into u.au */
  int desiredAutoCommit;
  int iRollback;
  int turnOnAC;
#endif /* local variables moved into u.au */

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

#if 0
  if( u.au.turnOnAC && u.au.iRollback && db->nVdbeActive>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.au.turnOnAC && !u.au.iRollback && db->nVdbeWrite>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.au.desiredAutoCommit!=db->autoCommit ){
    if( u.au.iRollback ){
      assert( u.au.desiredAutoCommit==1 );
      sqlite3RollbackAll(db, SQLITE_ABORT_ROLLBACK);
      db->autoCommit = 1;
    }else if( (rc = sqlite3VdbeCheckFk(p, 1))!=SQLITE_OK ){
      goto vdbe_return;
    }else{
      db->autoCommit = (u8)u.au.desiredAutoCommit;
      if( sqlite3VdbeHalt(p)==SQLITE_BUSY ){
        p->pc = pc;
        db->autoCommit = (u8)(1-u.au.desiredAutoCommit);
        p->rc = rc = SQLITE_BUSY;
        goto vdbe_return;
      }
    }
    assert( db->nStatement==0 );
    sqlite3CloseSavepoints(db);
    if( p->rc==SQLITE_OK ){
................................................................................
      rc = SQLITE_DONE;
    }else{
      rc = SQLITE_ERROR;
    }
    goto vdbe_return;
  }else{
    sqlite3SetString(&p->zErrMsg, db,
        (!u.au.desiredAutoCommit)?"cannot start a transaction within a transaction":(
        (u.au.iRollback)?"cannot rollback - no transaction is active":
                   "cannot commit - no transaction is active"));

    rc = SQLITE_ERROR;
  }
  break;
}

/* Opcode: Transaction P1 P2 * * *
**
................................................................................
** VDBE to be rolled back after an error without having to roll back the
** entire transaction. If no error is encountered, the statement transaction
** will automatically commit when the VDBE halts.
**
** If P2 is zero, then a read-lock is obtained on the database file.
*/
case OP_Transaction: {
#if 0  /* local variables moved into u.av */
  Btree *pBt;
#endif /* local variables moved into u.av */

  assert( p->bIsReader );
  assert( p->readOnly==0 || pOp->p2==0 );
  assert( pOp->p1>=0 && pOp->p1<db->nDb );
  assert( (p->btreeMask & (((yDbMask)1)<<pOp->p1))!=0 );
  if( pOp->p2 && (db->flags & SQLITE_QueryOnly)!=0 ){
    rc = SQLITE_READONLY;
    goto abort_due_to_error;
  }
  u.av.pBt = db->aDb[pOp->p1].pBt;

  if( u.av.pBt ){
    rc = sqlite3BtreeBeginTrans(u.av.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->nVdbeRead>1)
    ){
      assert( sqlite3BtreeIsInTrans(u.av.pBt) );
      if( p->iStatement==0 ){
        assert( db->nStatement>=0 && db->nSavepoint>=0 );
        db->nStatement++;
        p->iStatement = db->nSavepoint + db->nStatement;
      }

      rc = sqlite3VtabSavepoint(db, SAVEPOINT_BEGIN, p->iStatement-1);
      if( rc==SQLITE_OK ){
        rc = sqlite3BtreeBeginStmt(u.av.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;
      p->nStmtDefImmCons = db->nDeferredImmCons;
................................................................................
** temporary tables.
**
** There must be a read-lock on the database (either a transaction
** must be started or there must be an open cursor) before
** executing this instruction.
*/
case OP_ReadCookie: {               /* out2-prerelease */
#if 0  /* local variables moved into u.aw */
  int iMeta;
  int iDb;
  int iCookie;
#endif /* local variables moved into u.aw */

  assert( p->bIsReader );
  u.aw.iDb = pOp->p1;
  u.aw.iCookie = pOp->p3;
  assert( pOp->p3<SQLITE_N_BTREE_META );
  assert( u.aw.iDb>=0 && u.aw.iDb<db->nDb );

  assert( db->aDb[u.aw.iDb].pBt!=0 );
  assert( (p->btreeMask & (((yDbMask)1)<<u.aw.iDb))!=0 );

  sqlite3BtreeGetMeta(db->aDb[u.aw.iDb].pBt, u.aw.iCookie, (u32 *)&u.aw.iMeta);
  pOut->u.i = u.aw.iMeta;
  break;
}

/* Opcode: SetCookie P1 P2 P3 * *
**
** Write the content of register P3 (interpreted as an integer)
** into cookie number P2 of database P1.  P2==1 is the schema version.  
................................................................................
** P2==2 is the database format. P2==3 is the recommended pager cache 
** size, and so forth.  P1==0 is the main database file and P1==1 is the 
** database file used to store temporary tables.
**
** A transaction must be started before executing this opcode.
*/
case OP_SetCookie: {       /* in3 */
#if 0  /* local variables moved into u.ax */
  Db *pDb;
#endif /* local variables moved into u.ax */
  assert( pOp->p2<SQLITE_N_BTREE_META );
  assert( pOp->p1>=0 && pOp->p1<db->nDb );
  assert( (p->btreeMask & (((yDbMask)1)<<pOp->p1))!=0 );
  assert( p->readOnly==0 );
  u.ax.pDb = &db->aDb[pOp->p1];
  assert( u.ax.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.ax.pDb->pBt, pOp->p2, (int)pIn3->u.i);
  if( pOp->p2==BTREE_SCHEMA_VERSION ){
    /* When the schema cookie changes, record the new cookie internally */
    u.ax.pDb->pSchema->schema_cookie = (int)pIn3->u.i;
    db->flags |= SQLITE_InternChanges;
  }else if( pOp->p2==BTREE_FILE_FORMAT ){
    /* Record changes in the file format */
    u.ax.pDb->pSchema->file_format = (u8)pIn3->u.i;
  }
  if( pOp->p1==1 ){
    /* Invalidate all prepared statements whenever the TEMP database
    ** schema is changed.  Ticket #1644 */
    sqlite3ExpirePreparedStatements(db);
    p->expired = 0;
  }
................................................................................
** and that the current process needs to reread the schema.
**
** Either a transaction needs to have been started or an OP_Open needs
** to be executed (to establish a read lock) before this opcode is
** invoked.
*/
case OP_VerifyCookie: {
#if 0  /* local variables moved into u.ay */
  int iMeta;
  int iGen;
  Btree *pBt;
#endif /* local variables moved into u.ay */

  assert( pOp->p1>=0 && pOp->p1<db->nDb );
  assert( (p->btreeMask & (((yDbMask)1)<<pOp->p1))!=0 );
  assert( sqlite3SchemaMutexHeld(db, pOp->p1, 0) );
  assert( p->bIsReader );
  u.ay.pBt = db->aDb[pOp->p1].pBt;
  if( u.ay.pBt ){
    sqlite3BtreeGetMeta(u.ay.pBt, BTREE_SCHEMA_VERSION, (u32 *)&u.ay.iMeta);
    u.ay.iGen = db->aDb[pOp->p1].pSchema->iGeneration;
  }else{
    u.ay.iGen = u.ay.iMeta = 0;
  }
  if( u.ay.iMeta!=pOp->p2 || u.ay.iGen!=pOp->p3 ){
    sqlite3DbFree(db, p->zErrMsg);
    p->zErrMsg = sqlite3DbStrDup(db, "database schema has changed");
    /* If the schema-cookie from the database file matches the cookie
    ** stored with the in-memory representation of the schema, do
    ** not reload the schema from the database file.
    **
    ** If virtual-tables are in use, this is not just an optimization.
    ** Often, v-tables store their data in other SQLite tables, which
    ** are queried from within xNext() and other v-table methods using
    ** prepared queries. If such a query is out-of-date, we do not want to
    ** discard the database schema, as the user code implementing the
    ** v-table would have to be ready for the sqlite3_vtab structure itself
    ** to be invalidated whenever sqlite3_step() is called from within
    ** a v-table method.
    */
    if( db->aDb[pOp->p1].pSchema->schema_cookie!=u.ay.iMeta ){
      sqlite3ResetOneSchema(db, pOp->p1);
    }

    p->expired = 1;
    rc = SQLITE_SCHEMA;
  }
  break;
................................................................................
** in read/write mode.  For a given table, there can be one or more read-only
** cursors or a single read/write cursor but not both.
**
** See also OpenRead.
*/
case OP_OpenRead:
case OP_OpenWrite: {
#if 0  /* local variables moved into u.az */
  int nField;
  KeyInfo *pKeyInfo;
  int p2;
  int iDb;
  int wrFlag;
  Btree *pX;
  VdbeCursor *pCur;
  Db *pDb;
#endif /* local variables moved into u.az */

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

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

  u.az.nField = 0;
  u.az.pKeyInfo = 0;
  u.az.p2 = pOp->p2;
  u.az.iDb = pOp->p3;
  assert( u.az.iDb>=0 && u.az.iDb<db->nDb );
  assert( (p->btreeMask & (((yDbMask)1)<<u.az.iDb))!=0 );
  u.az.pDb = &db->aDb[u.az.iDb];
  u.az.pX = u.az.pDb->pBt;
  assert( u.az.pX!=0 );
  if( pOp->opcode==OP_OpenWrite ){
    u.az.wrFlag = 1;
    assert( sqlite3SchemaMutexHeld(db, u.az.iDb, 0) );
    if( u.az.pDb->pSchema->file_format < p->minWriteFileFormat ){
      p->minWriteFileFormat = u.az.pDb->pSchema->file_format;
    }
  }else{
    u.az.wrFlag = 0;
  }
  if( pOp->p5 & OPFLAG_P2ISREG ){
    assert( u.az.p2>0 );
    assert( u.az.p2<=(p->nMem-p->nCursor) );
    pIn2 = &aMem[u.az.p2];
    assert( memIsValid(pIn2) );
    assert( (pIn2->flags & MEM_Int)!=0 );
    sqlite3VdbeMemIntegerify(pIn2);
    u.az.p2 = (int)pIn2->u.i;
    /* The u.az.p2 value always comes from a prior OP_CreateTable opcode and
    ** that opcode will always set the u.az.p2 value to 2 or more or else fail.
    ** If there were a failure, the prepared statement would have halted
    ** before reaching this instruction. */
    if( NEVER(u.az.p2<2) ) {
      rc = SQLITE_CORRUPT_BKPT;
      goto abort_due_to_error;
    }
  }
  if( pOp->p4type==P4_KEYINFO ){
    u.az.pKeyInfo = pOp->p4.pKeyInfo;
    assert( u.az.pKeyInfo->enc==ENC(db) );
    assert( u.az.pKeyInfo->db==db );
    u.az.nField = u.az.pKeyInfo->nField+u.az.pKeyInfo->nXField;
  }else if( pOp->p4type==P4_INT32 ){
    u.az.nField = pOp->p4.i;
  }
  assert( pOp->p1>=0 );
  assert( u.az.nField>=0 );
  testcase( u.az.nField==0 );  /* Table with INTEGER PRIMARY KEY and nothing else */
  u.az.pCur = allocateCursor(p, pOp->p1, u.az.nField, u.az.iDb, 1);
  if( u.az.pCur==0 ) goto no_mem;
  u.az.pCur->nullRow = 1;
  u.az.pCur->isOrdered = 1;
  rc = sqlite3BtreeCursor(u.az.pX, u.az.p2, u.az.wrFlag, u.az.pKeyInfo, u.az.pCur->pCursor);
  u.az.pCur->pKeyInfo = u.az.pKeyInfo;
  assert( OPFLAG_BULKCSR==BTREE_BULKLOAD );
  sqlite3BtreeCursorHints(u.az.pCur->pCursor, (pOp->p5 & OPFLAG_BULKCSR));

  /* Since it performs no memory allocation or IO, the only value that
  ** sqlite3BtreeCursor() may return is SQLITE_OK. */
  assert( rc==SQLITE_OK );

  /* Set the VdbeCursor.isTable variable. Previous versions of
  ** SQLite used to check if the root-page flags were sane at this point
  ** and report database corruption if they were not, but this check has
  ** since moved into the btree layer.  */
  u.az.pCur->isTable = pOp->p4type!=P4_KEYINFO;
  break;
}

/* Opcode: OpenEphemeral P1 P2 * P4 P5
** Synopsis: nColumn=P2
**
** Open a new cursor P1 to a transient table.
................................................................................
** This opcode works the same as OP_OpenEphemeral.  It has a
** different name to distinguish its use.  Tables created using
** by this opcode will be used for automatically created transient
** indices in joins.
*/
case OP_OpenAutoindex: 
case OP_OpenEphemeral: {
#if 0  /* local variables moved into u.ba */
  VdbeCursor *pCx;
  KeyInfo *pKeyInfo;
#endif /* local variables moved into u.ba */

  static const int vfsFlags =
      SQLITE_OPEN_READWRITE |
      SQLITE_OPEN_CREATE |
      SQLITE_OPEN_EXCLUSIVE |
      SQLITE_OPEN_DELETEONCLOSE |
      SQLITE_OPEN_TRANSIENT_DB;
  assert( pOp->p1>=0 );
  assert( pOp->p2>=0 );
  u.ba.pCx = allocateCursor(p, pOp->p1, pOp->p2, -1, 1);
  if( u.ba.pCx==0 ) goto no_mem;
  u.ba.pCx->nullRow = 1;
  rc = sqlite3BtreeOpen(db->pVfs, 0, db, &u.ba.pCx->pBt,
                        BTREE_OMIT_JOURNAL | BTREE_SINGLE | pOp->p5, vfsFlags);
  if( rc==SQLITE_OK ){
    rc = sqlite3BtreeBeginTrans(u.ba.pCx->pBt, 1);
  }
  if( rc==SQLITE_OK ){
    /* If a transient index is required, create it by calling
    ** sqlite3BtreeCreateTable() with the BTREE_BLOBKEY flag before
    ** opening it. If a transient table is required, just use the
    ** automatically created table with root-page 1 (an BLOB_INTKEY table).
    */
    if( (u.ba.pKeyInfo = pOp->p4.pKeyInfo)!=0 ){
      int pgno;
      assert( pOp->p4type==P4_KEYINFO );
      rc = sqlite3BtreeCreateTable(u.ba.pCx->pBt, &pgno, BTREE_BLOBKEY | pOp->p5);
      if( rc==SQLITE_OK ){
        assert( pgno==MASTER_ROOT+1 );
        assert( u.ba.pKeyInfo->db==db );
        assert( u.ba.pKeyInfo->enc==ENC(db) );
        u.ba.pCx->pKeyInfo = u.ba.pKeyInfo;
        rc = sqlite3BtreeCursor(u.ba.pCx->pBt, pgno, 1, u.ba.pKeyInfo, u.ba.pCx->pCursor);
      }
      u.ba.pCx->isTable = 0;
    }else{
      rc = sqlite3BtreeCursor(u.ba.pCx->pBt, MASTER_ROOT, 1, 0, u.ba.pCx->pCursor);
      u.ba.pCx->isTable = 1;
    }
  }
  u.ba.pCx->isOrdered = (pOp->p5!=BTREE_UNORDERED);
  break;
}



























/* Opcode: SorterOpen P1 * * P4 *
**
** This opcode works like OP_OpenEphemeral except that it opens
** a transient index that is specifically designed to sort large
** tables using an external merge-sort algorithm.
*/
case OP_SorterOpen: {
#if 0  /* local variables moved into u.bb */
  VdbeCursor *pCx;
#endif /* local variables moved into u.bb */

  assert( pOp->p1>=0 );
  assert( pOp->p2>=0 );
  u.bb.pCx = allocateCursor(p, pOp->p1, pOp->p2, -1, 1);
  if( u.bb.pCx==0 ) goto no_mem;
  u.bb.pCx->pKeyInfo = pOp->p4.pKeyInfo;
  assert( u.bb.pCx->pKeyInfo->db==db );
  assert( u.bb.pCx->pKeyInfo->enc==ENC(db) );
  rc = sqlite3VdbeSorterInit(db, u.bb.pCx);
  break;
}

/* Opcode: OpenPseudo P1 P2 P3 * P5
** Synopsis: content in r[P2@P3]
**
** Open a new cursor that points to a fake table that contains a single
................................................................................
** individual columns using the OP_Column opcode.  The OP_Column opcode
** is the only cursor opcode that works with a pseudo-table.
**
** P3 is the number of fields in the records that will be stored by
** the pseudo-table.
*/
case OP_OpenPseudo: {
#if 0  /* local variables moved into u.bc */
  VdbeCursor *pCx;
#endif /* local variables moved into u.bc */

  assert( pOp->p1>=0 );
  assert( pOp->p3>=0 );
  u.bc.pCx = allocateCursor(p, pOp->p1, pOp->p3, -1, 0);
  if( u.bc.pCx==0 ) goto no_mem;
  u.bc.pCx->nullRow = 1;
  u.bc.pCx->pseudoTableReg = pOp->p2;
  u.bc.pCx->isTable = 1;
  u.bc.pCx->multiPseudo = pOp->p5;
  break;
}

/* Opcode: Close P1 * * * *
**
** Close a cursor previously opened as P1.  If P1 is not
** currently open, this instruction is a no-op.
................................................................................
**
** See also: Found, NotFound, Distinct, SeekGt, SeekGe, SeekLt
*/
case OP_SeekLt:         /* jump, in3 */
case OP_SeekLe:         /* jump, in3 */
case OP_SeekGe:         /* jump, in3 */
case OP_SeekGt: {       /* jump, in3 */
#if 0  /* local variables moved into u.bd */
  int res;
  int oc;
  VdbeCursor *pC;
  UnpackedRecord r;
  int nField;
  i64 iKey;      /* The rowid we are to seek to */
#endif /* local variables moved into u.bd */

  assert( pOp->p1>=0 && pOp->p1<p->nCursor );
  assert( pOp->p2!=0 );
  u.bd.pC = p->apCsr[pOp->p1];
  assert( u.bd.pC!=0 );
  assert( u.bd.pC->pseudoTableReg==0 );
  assert( OP_SeekLe == OP_SeekLt+1 );
  assert( OP_SeekGe == OP_SeekLt+2 );
  assert( OP_SeekGt == OP_SeekLt+3 );
  assert( u.bd.pC->isOrdered );
  assert( u.bd.pC->pCursor!=0 );
  u.bd.oc = pOp->opcode;
  u.bd.pC->nullRow = 0;
  if( u.bd.pC->isTable ){
    /* The input value in P3 might be of any type: integer, real, string,
    ** blob, or NULL.  But it needs to be an integer before we can do
    ** the seek, so covert it. */
    pIn3 = &aMem[pOp->p3];
    applyNumericAffinity(pIn3);
    u.bd.iKey = sqlite3VdbeIntValue(pIn3);
    u.bd.pC->rowidIsValid = 0;

    /* If the P3 value could not be converted into an integer without
    ** loss of information, then special processing is required... */
    if( (pIn3->flags & MEM_Int)==0 ){
      if( (pIn3->flags & MEM_Real)==0 ){
        /* If the P3 value cannot be converted into any kind of a number,
        ** then the seek is not possible, so jump to P2 */
        pc = pOp->p2 - 1;
        break;
      }

      /* If the approximation u.bd.iKey is larger than the actual real search
      ** term, substitute >= for > and < for <=. e.g. if the search term
      ** is 4.9 and the integer approximation 5:
      **
      **        (x >  4.9)    ->     (x >= 5)
      **        (x <= 4.9)    ->     (x <  5)
      */
      if( pIn3->r<(double)u.bd.iKey ){
        assert( OP_SeekGe==(OP_SeekGt-1) );
        assert( OP_SeekLt==(OP_SeekLe-1) );
        assert( (OP_SeekLe & 0x0001)==(OP_SeekGt & 0x0001) );
        if( (u.bd.oc & 0x0001)==(OP_SeekGt & 0x0001) ) u.bd.oc--;
      }

      /* If the approximation u.bd.iKey is smaller than the actual real search
      ** term, substitute <= for < and > for >=.  */
      else if( pIn3->r>(double)u.bd.iKey ){
        assert( OP_SeekLe==(OP_SeekLt+1) );
        assert( OP_SeekGt==(OP_SeekGe+1) );
        assert( (OP_SeekLt & 0x0001)==(OP_SeekGe & 0x0001) );
        if( (u.bd.oc & 0x0001)==(OP_SeekLt & 0x0001) ) u.bd.oc++;
      }
    }
    rc = sqlite3BtreeMovetoUnpacked(u.bd.pC->pCursor, 0, (u64)u.bd.iKey, 0, &u.bd.res);
    if( rc!=SQLITE_OK ){
      goto abort_due_to_error;
    }
    if( u.bd.res==0 ){
      u.bd.pC->rowidIsValid = 1;
      u.bd.pC->lastRowid = u.bd.iKey;
    }
  }else{
    u.bd.nField = pOp->p4.i;
    assert( pOp->p4type==P4_INT32 );
    assert( u.bd.nField>0 );
    u.bd.r.pKeyInfo = u.bd.pC->pKeyInfo;
    u.bd.r.nField = (u16)u.bd.nField;

    /* The next line of code computes as follows, only faster:
    **   if( u.bd.oc==OP_SeekGt || u.bd.oc==OP_SeekLe ){
    **     u.bd.r.flags = UNPACKED_INCRKEY;
    **   }else{
    **     u.bd.r.flags = 0;
    **   }
    */
    u.bd.r.flags = (u8)(UNPACKED_INCRKEY * (1 & (u.bd.oc - OP_SeekLt)));
    assert( u.bd.oc!=OP_SeekGt || u.bd.r.flags==UNPACKED_INCRKEY );
    assert( u.bd.oc!=OP_SeekLe || u.bd.r.flags==UNPACKED_INCRKEY );
    assert( u.bd.oc!=OP_SeekGe || u.bd.r.flags==0 );
    assert( u.bd.oc!=OP_SeekLt || u.bd.r.flags==0 );

    u.bd.r.aMem = &aMem[pOp->p3];
#ifdef SQLITE_DEBUG
    { int i; for(i=0; i<u.bd.r.nField; i++) assert( memIsValid(&u.bd.r.aMem[i]) ); }
#endif
    ExpandBlob(u.bd.r.aMem);
    rc = sqlite3BtreeMovetoUnpacked(u.bd.pC->pCursor, &u.bd.r, 0, 0, &u.bd.res);
    if( rc!=SQLITE_OK ){
      goto abort_due_to_error;
    }
    u.bd.pC->rowidIsValid = 0;
  }
  u.bd.pC->deferredMoveto = 0;
  u.bd.pC->cacheStatus = CACHE_STALE;
#ifdef SQLITE_TEST
  sqlite3_search_count++;
#endif
  if( u.bd.oc>=OP_SeekGe ){  assert( u.bd.oc==OP_SeekGe || u.bd.oc==OP_SeekGt );
    if( u.bd.res<0 || (u.bd.res==0 && u.bd.oc==OP_SeekGt) ){
      rc = sqlite3BtreeNext(u.bd.pC->pCursor, &u.bd.res);
      if( rc!=SQLITE_OK ) goto abort_due_to_error;
      u.bd.pC->rowidIsValid = 0;
    }else{
      u.bd.res = 0;
    }
  }else{
    assert( u.bd.oc==OP_SeekLt || u.bd.oc==OP_SeekLe );
    if( u.bd.res>0 || (u.bd.res==0 && u.bd.oc==OP_SeekLt) ){
      rc = sqlite3BtreePrevious(u.bd.pC->pCursor, &u.bd.res);
      if( rc!=SQLITE_OK ) goto abort_due_to_error;
      u.bd.pC->rowidIsValid = 0;
    }else{
      /* u.bd.res might be negative because the table is empty.  Check to
      ** see if this is the case.
      */
      u.bd.res = sqlite3BtreeEof(u.bd.pC->pCursor);
    }
  }
  assert( pOp->p2>0 );
  if( u.bd.res ){
    pc = pOp->p2 - 1;
  }
  break;
}

/* Opcode: Seek P1 P2 * * *
** Synopsis:  intkey=r[P2]
................................................................................
** for P1 to move so that it points to the rowid given by P2.
**
** This is actually a deferred seek.  Nothing actually happens until
** the cursor is used to read a record.  That way, if no reads
** occur, no unnecessary I/O happens.
*/
case OP_Seek: {    /* in2 */
#if 0  /* local variables moved into u.be */
  VdbeCursor *pC;
#endif /* local variables moved into u.be */

  assert( pOp->p1>=0 && pOp->p1<p->nCursor );
  u.be.pC = p->apCsr[pOp->p1];
  assert( u.be.pC!=0 );
  assert( u.be.pC->pCursor!=0 );
  assert( u.be.pC->isTable );
  u.be.pC->nullRow = 0;
  pIn2 = &aMem[pOp->p2];
  u.be.pC->movetoTarget = sqlite3VdbeIntValue(pIn2);
  u.be.pC->rowidIsValid = 0;
  u.be.pC->deferredMoveto = 1;
  break;
}
  

/* Opcode: Found P1 P2 P3 P4 *
** Synopsis: key=r[P3@P4]
**
................................................................................
** branch is always taken if any part of the search key input is NULL.
**
** See also: NotFound, Found, NotExists
*/
case OP_NoConflict:     /* jump, in3 */
case OP_NotFound:       /* jump, in3 */
case OP_Found: {        /* jump, in3 */
#if 0  /* local variables moved into u.bf */
  int alreadyExists;
  int ii;
  VdbeCursor *pC;
  int res;
  char *pFree;
  UnpackedRecord *pIdxKey;
  UnpackedRecord r;
  char aTempRec[ROUND8(sizeof(UnpackedRecord)) + sizeof(Mem)*4 + 7];
#endif /* local variables moved into u.bf */

#ifdef SQLITE_TEST
  if( pOp->opcode!=OP_NoConflict ) sqlite3_found_count++;
#endif

  u.bf.alreadyExists = 0;
  assert( pOp->p1>=0 && pOp->p1<p->nCursor );
  assert( pOp->p4type==P4_INT32 );
  u.bf.pC = p->apCsr[pOp->p1];
  assert( u.bf.pC!=0 );
  pIn3 = &aMem[pOp->p3];
  assert( u.bf.pC->pCursor!=0 );
  assert( u.bf.pC->isTable==0 );

  if( pOp->p4.i>0 ){
    u.bf.r.pKeyInfo = u.bf.pC->pKeyInfo;
    u.bf.r.nField = (u16)pOp->p4.i;
    u.bf.r.aMem = pIn3;
#ifdef SQLITE_DEBUG
    {
      int i;
      for(i=0; i<u.bf.r.nField; i++){
        assert( memIsValid(&u.bf.r.aMem[i]) );
        if( i ) REGISTER_TRACE(pOp->p3+i, &u.bf.r.aMem[i]);
      }
    }
#endif
    u.bf.r.flags = UNPACKED_PREFIX_MATCH;
    u.bf.pIdxKey = &u.bf.r;
  }else{
    u.bf.pIdxKey = sqlite3VdbeAllocUnpackedRecord(
        u.bf.pC->pKeyInfo, u.bf.aTempRec, sizeof(u.bf.aTempRec), &u.bf.pFree
    );
    if( u.bf.pIdxKey==0 ) goto no_mem;
    assert( pIn3->flags & MEM_Blob );
    assert( (pIn3->flags & MEM_Zero)==0 );  /* zeroblobs already expanded */
    sqlite3VdbeRecordUnpack(u.bf.pC->pKeyInfo, pIn3->n, pIn3->z, u.bf.pIdxKey);
    u.bf.pIdxKey->flags |= UNPACKED_PREFIX_MATCH;
  }
  if( pOp->opcode==OP_NoConflict ){
    /* For the OP_NoConflict opcode, take the jump if any of the
    ** input fields are NULL, since any key with a NULL will not
    ** conflict */
    for(u.bf.ii=0; u.bf.ii<u.bf.r.nField; u.bf.ii++){
      if( u.bf.r.aMem[u.bf.ii].flags & MEM_Null ){
        pc = pOp->p2 - 1;
        break;
      }
    }
  }
  rc = sqlite3BtreeMovetoUnpacked(u.bf.pC->pCursor, u.bf.pIdxKey, 0, 0, &u.bf.res);
  if( pOp->p4.i==0 ){
    sqlite3DbFree(db, u.bf.pFree);
  }
  if( rc!=SQLITE_OK ){
    break;
  }
  u.bf.pC->seekResult = u.bf.res;
  u.bf.alreadyExists = (u.bf.res==0);
  u.bf.pC->nullRow = 1-u.bf.alreadyExists;
  u.bf.pC->deferredMoveto = 0;
  u.bf.pC->cacheStatus = CACHE_STALE;
  if( pOp->opcode==OP_Found ){
    if( u.bf.alreadyExists ) pc = pOp->p2 - 1;
  }else{
    if( !u.bf.alreadyExists ) pc = pOp->p2 - 1;
  }
  break;
}

/* Opcode: NotExists P1 P2 P3 * *
** Synopsis: intkey=r[P3]
**
................................................................................
**
** The OP_NotFound opcode performs the same operation on index btrees
** (with arbitrary multi-value keys).
**
** See also: Found, NotFound, NoConflict
*/
case OP_NotExists: {        /* jump, in3 */
#if 0  /* local variables moved into u.bg */
  VdbeCursor *pC;
  BtCursor *pCrsr;
  int res;
  u64 iKey;
#endif /* local variables moved into u.bg */

  pIn3 = &aMem[pOp->p3];
  assert( pIn3->flags & MEM_Int );
  assert( pOp->p1>=0 && pOp->p1<p->nCursor );
  u.bg.pC = p->apCsr[pOp->p1];
  assert( u.bg.pC!=0 );
  assert( u.bg.pC->isTable );
  assert( u.bg.pC->pseudoTableReg==0 );
  u.bg.pCrsr = u.bg.pC->pCursor;
  assert( u.bg.pCrsr!=0 );
  u.bg.res = 0;
  u.bg.iKey = pIn3->u.i;
  rc = sqlite3BtreeMovetoUnpacked(u.bg.pCrsr, 0, u.bg.iKey, 0, &u.bg.res);
  u.bg.pC->lastRowid = pIn3->u.i;
  u.bg.pC->rowidIsValid = u.bg.res==0 ?1:0;
  u.bg.pC->nullRow = 0;
  u.bg.pC->cacheStatus = CACHE_STALE;
  u.bg.pC->deferredMoveto = 0;
  if( u.bg.res!=0 ){
    pc = pOp->p2 - 1;
    assert( u.bg.pC->rowidIsValid==0 );
  }
  u.bg.pC->seekResult = u.bg.res;
  break;
}

/* Opcode: Sequence P1 P2 * * *
** Synopsis: r[P2]=rowid
**
** Find the next available sequence number for cursor P1.
................................................................................
** the largest previously generated record number. No new record numbers are
** allowed to be less than this value. When this value reaches its maximum, 
** an SQLITE_FULL error is generated. The P3 register is updated with the '
** generated record number. This P3 mechanism is used to help implement the
** AUTOINCREMENT feature.
*/
case OP_NewRowid: {           /* out2-prerelease */
#if 0  /* local variables moved into u.bh */
  i64 v;                 /* The new rowid */
  VdbeCursor *pC;        /* Cursor of table to get the new rowid */
  int res;               /* Result of an sqlite3BtreeLast() */
  int cnt;               /* Counter to limit the number of searches */
  Mem *pMem;             /* Register holding largest rowid for AUTOINCREMENT */
  VdbeFrame *pFrame;     /* Root frame of VDBE */
#endif /* local variables moved into u.bh */

  u.bh.v = 0;
  u.bh.res = 0;
  assert( pOp->p1>=0 && pOp->p1<p->nCursor );
  u.bh.pC = p->apCsr[pOp->p1];
  assert( u.bh.pC!=0 );
  if( NEVER(u.bh.pC->pCursor==0) ){
    /* The zero initialization above is all that is needed */
  }else{
    /* The next rowid or record number (different terms for the same
    ** thing) is obtained in a two-step algorithm.
    **
    ** First we attempt to find the largest existing rowid and add one
    ** to that.  But if the largest existing rowid is already the maximum
................................................................................
    ** probabilistic algorithm
    **
    ** The second algorithm is to select a rowid at random and see if
    ** it already exists in the table.  If it does not exist, we have
    ** succeeded.  If the random rowid does exist, we select a new one
    ** and try again, up to 100 times.
    */
    assert( u.bh.pC->isTable );

#ifdef SQLITE_32BIT_ROWID
#   define MAX_ROWID 0x7fffffff
#else
    /* Some compilers complain about constants of the form 0x7fffffffffffffff.
    ** Others complain about 0x7ffffffffffffffffLL.  The following macro seems
    ** to provide the constant while making all compilers happy.
    */
#   define MAX_ROWID  (i64)( (((u64)0x7fffffff)<<32) | (u64)0xffffffff )
#endif

    if( !u.bh.pC->useRandomRowid ){
      u.bh.v = sqlite3BtreeGetCachedRowid(u.bh.pC->pCursor);
      if( u.bh.v==0 ){
        rc = sqlite3BtreeLast(u.bh.pC->pCursor, &u.bh.res);
        if( rc!=SQLITE_OK ){
          goto abort_due_to_error;
        }
        if( u.bh.res ){
          u.bh.v = 1;   /* IMP: R-61914-48074 */
        }else{
          assert( sqlite3BtreeCursorIsValid(u.bh.pC->pCursor) );
          rc = sqlite3BtreeKeySize(u.bh.pC->pCursor, &u.bh.v);
          assert( rc==SQLITE_OK );   /* Cannot fail following BtreeLast() */
          if( u.bh.v>=MAX_ROWID ){
            u.bh.pC->useRandomRowid = 1;
          }else{
            u.bh.v++;   /* IMP: R-29538-34987 */
          }
        }
      }

#ifndef SQLITE_OMIT_AUTOINCREMENT
      if( pOp->p3 ){
        /* Assert that P3 is a valid memory cell. */
        assert( pOp->p3>0 );
        if( p->pFrame ){
          for(u.bh.pFrame=p->pFrame; u.bh.pFrame->pParent; u.bh.pFrame=u.bh.pFrame->pParent);
          /* Assert that P3 is a valid memory cell. */
          assert( pOp->p3<=u.bh.pFrame->nMem );
          u.bh.pMem = &u.bh.pFrame->aMem[pOp->p3];
        }else{
          /* Assert that P3 is a valid memory cell. */
          assert( pOp->p3<=(p->nMem-p->nCursor) );
          u.bh.pMem = &aMem[pOp->p3];
          memAboutToChange(p, u.bh.pMem);
        }
        assert( memIsValid(u.bh.pMem) );

        REGISTER_TRACE(pOp->p3, u.bh.pMem);
        sqlite3VdbeMemIntegerify(u.bh.pMem);
        assert( (u.bh.pMem->flags & MEM_Int)!=0 );  /* mem(P3) holds an integer */
        if( u.bh.pMem->u.i==MAX_ROWID || u.bh.pC->useRandomRowid ){
          rc = SQLITE_FULL;   /* IMP: R-12275-61338 */
          goto abort_due_to_error;
        }
        if( u.bh.v<u.bh.pMem->u.i+1 ){
          u.bh.v = u.bh.pMem->u.i + 1;
        }
        u.bh.pMem->u.i = u.bh.v;
      }
#endif

      sqlite3BtreeSetCachedRowid(u.bh.pC->pCursor, u.bh.v<MAX_ROWID ? u.bh.v+1 : 0);
    }
    if( u.bh.pC->useRandomRowid ){
      /* IMPLEMENTATION-OF: R-07677-41881 If the largest ROWID is equal to the
      ** largest possible integer (9223372036854775807) then the database
      ** engine starts picking positive candidate ROWIDs at random until
      ** it finds one that is not previously used. */
      assert( pOp->p3==0 );  /* We cannot be in random rowid mode if this is
                             ** an AUTOINCREMENT table. */
      /* on the first attempt, simply do one more than previous */
      u.bh.v = lastRowid;
      u.bh.v &= (MAX_ROWID>>1); /* ensure doesn't go negative */
      u.bh.v++; /* ensure non-zero */
      u.bh.cnt = 0;
      while(   ((rc = sqlite3BtreeMovetoUnpacked(u.bh.pC->pCursor, 0, (u64)u.bh.v,
                                                 0, &u.bh.res))==SQLITE_OK)
            && (u.bh.res==0)
            && (++u.bh.cnt<100)){
        /* collision - try another random rowid */
        sqlite3_randomness(sizeof(u.bh.v), &u.bh.v);
        if( u.bh.cnt<5 ){
          /* try "small" random rowids for the initial attempts */
          u.bh.v &= 0xffffff;
        }else{
          u.bh.v &= (MAX_ROWID>>1); /* ensure doesn't go negative */
        }
        u.bh.v++; /* ensure non-zero */
      }
      if( rc==SQLITE_OK && u.bh.res==0 ){
        rc = SQLITE_FULL;   /* IMP: R-38219-53002 */
        goto abort_due_to_error;
      }
      assert( u.bh.v>0 );  /* EV: R-40812-03570 */
    }
    u.bh.pC->rowidIsValid = 0;
    u.bh.pC->deferredMoveto = 0;
    u.bh.pC->cacheStatus = CACHE_STALE;
  }
  pOut->u.i = u.bh.v;
  break;
}

/* Opcode: Insert P1 P2 P3 P4 P5
** Synopsis: intkey=r[P3] data=r[P2]
**
** Write an entry into the table of cursor P1.  A new entry is
................................................................................
** Synopsis:  intkey=P3 data=r[P2]
**
** This works exactly like OP_Insert except that the key is the
** integer value P3, not the value of the integer stored in register P3.
*/
case OP_Insert: 
case OP_InsertInt: {
#if 0  /* local variables moved into u.bi */
  Mem *pData;       /* MEM cell holding data for the record to be inserted */
  Mem *pKey;        /* MEM cell holding key  for the record */
  i64 iKey;         /* The integer ROWID or key for the record to be inserted */
  VdbeCursor *pC;   /* Cursor to table into which insert is written */
  int nZero;        /* Number of zero-bytes to append */
  int seekResult;   /* Result of prior seek or 0 if no USESEEKRESULT flag */
  const char *zDb;  /* database name - used by the update hook */
  const char *zTbl; /* Table name - used by the opdate hook */
  int op;           /* Opcode for update hook: SQLITE_UPDATE or SQLITE_INSERT */
#endif /* local variables moved into u.bi */

  u.bi.pData = &aMem[pOp->p2];
  assert( pOp->p1>=0 && pOp->p1<p->nCursor );
  assert( memIsValid(u.bi.pData) );
  u.bi.pC = p->apCsr[pOp->p1];
  assert( u.bi.pC!=0 );
  assert( u.bi.pC->pCursor!=0 );
  assert( u.bi.pC->pseudoTableReg==0 );
  assert( u.bi.pC->isTable );
  REGISTER_TRACE(pOp->p2, u.bi.pData);

  if( pOp->opcode==OP_Insert ){
    u.bi.pKey = &aMem[pOp->p3];
    assert( u.bi.pKey->flags & MEM_Int );
    assert( memIsValid(u.bi.pKey) );
    REGISTER_TRACE(pOp->p3, u.bi.pKey);
    u.bi.iKey = u.bi.pKey->u.i;
  }else{
    assert( pOp->opcode==OP_InsertInt );
    u.bi.iKey = pOp->p3;
  }

  if( pOp->p5 & OPFLAG_NCHANGE ) p->nChange++;
  if( pOp->p5 & OPFLAG_LASTROWID ) db->lastRowid = lastRowid = u.bi.iKey;
  if( u.bi.pData->flags & MEM_Null ){
    u.bi.pData->z = 0;
    u.bi.pData->n = 0;
  }else{
    assert( u.bi.pData->flags & (MEM_Blob|MEM_Str) );
  }
  u.bi.seekResult = ((pOp->p5 & OPFLAG_USESEEKRESULT) ? u.bi.pC->seekResult : 0);
  if( u.bi.pData->flags & MEM_Zero ){
    u.bi.nZero = u.bi.pData->u.nZero;
  }else{
    u.bi.nZero = 0;
  }
  sqlite3BtreeSetCachedRowid(u.bi.pC->pCursor, 0);
  rc = sqlite3BtreeInsert(u.bi.pC->pCursor, 0, u.bi.iKey,
                          u.bi.pData->z, u.bi.pData->n, u.bi.nZero,

                          (pOp->p5 & OPFLAG_APPEND)!=0, u.bi.seekResult
  );
  u.bi.pC->rowidIsValid = 0;
  u.bi.pC->deferredMoveto = 0;
  u.bi.pC->cacheStatus = CACHE_STALE;

  /* Invoke the update-hook if required. */
  if( rc==SQLITE_OK && db->xUpdateCallback && pOp->p4.z ){
    u.bi.zDb = db->aDb[u.bi.pC->iDb].zName;
    u.bi.zTbl = pOp->p4.z;
    u.bi.op = ((pOp->p5 & OPFLAG_ISUPDATE) ? SQLITE_UPDATE : SQLITE_INSERT);
    assert( u.bi.pC->isTable );
    db->xUpdateCallback(db->pUpdateArg, u.bi.op, u.bi.zDb, u.bi.zTbl, u.bi.iKey);
    assert( u.bi.pC->iDb>=0 );
  }
  break;
}

/* Opcode: Delete P1 P2 * P4 *
**
** Delete the record at which the P1 cursor is currently pointing.
................................................................................
**
** If P4 is not NULL, then it is the name of the table that P1 is
** pointing to.  The update hook will be invoked, if it exists.
** If P4 is not NULL then the P1 cursor must have been positioned
** using OP_NotFound prior to invoking this opcode.
*/
case OP_Delete: {
#if 0  /* local variables moved into u.bj */
  i64 iKey;
  VdbeCursor *pC;
#endif /* local variables moved into u.bj */

  assert( pOp->p1>=0 && pOp->p1<p->nCursor );
  u.bj.pC = p->apCsr[pOp->p1];
  assert( u.bj.pC!=0 );
  assert( u.bj.pC->pCursor!=0 );  /* Only valid for real tables, no pseudotables */
  u.bj.iKey = u.bj.pC->lastRowid;      /* Only used for the update hook */

  /* The OP_Delete opcode always follows an OP_NotExists or OP_Last or
  ** OP_Column on the same table without any intervening operations that
  ** might move or invalidate the cursor.  Hence cursor u.bj.pC is always pointing
  ** to the row to be deleted and the sqlite3VdbeCursorMoveto() operation
  ** below is always a no-op and cannot fail.  We will run it anyhow, though,
  ** to guard against future changes to the code generator.
  **/
  assert( u.bj.pC->deferredMoveto==0 );
  rc = sqlite3VdbeCursorMoveto(u.bj.pC);
  if( NEVER(rc!=SQLITE_OK) ) goto abort_due_to_error;

  sqlite3BtreeSetCachedRowid(u.bj.pC->pCursor, 0);
  rc = sqlite3BtreeDelete(u.bj.pC->pCursor);
  u.bj.pC->cacheStatus = CACHE_STALE;

  /* Invoke the update-hook if required. */
  if( rc==SQLITE_OK && db->xUpdateCallback && pOp->p4.z && u.bj.pC->isTable ){
    db->xUpdateCallback(db->pUpdateArg, SQLITE_DELETE,
                        db->aDb[u.bj.pC->iDb].zName, pOp->p4.z, u.bj.iKey);
    assert( u.bj.pC->iDb>=0 );
  }
  if( pOp->p2 & OPFLAG_NCHANGE ) p->nChange++;
  break;
}
/* Opcode: ResetCount * * * * *
**
** The value of the change counter is copied to the database handle
................................................................................
** fields (not counting the P4 fields at the end which are ignored) then
** the comparison is assumed to be equal.
**
** Fall through to next instruction if the two records compare equal to
** each other.  Jump to P2 if they are different.
*/
case OP_SorterCompare: {
#if 0  /* local variables moved into u.bk */
  VdbeCursor *pC;
  int res;
  int nIgnore;
#endif /* local variables moved into u.bk */

  u.bk.pC = p->apCsr[pOp->p1];
  assert( isSorter(u.bk.pC) );
  assert( pOp->p4type==P4_INT32 );
  pIn3 = &aMem[pOp->p3];
  u.bk.nIgnore = pOp->p4.i;
  rc = sqlite3VdbeSorterCompare(u.bk.pC, pIn3, u.bk.nIgnore, &u.bk.res);
  if( u.bk.res ){
    pc = pOp->p2-1;
  }
  break;
};

/* Opcode: SorterData P1 P2 * * *
** Synopsis: r[P2]=data
**
** Write into register P2 the current sorter data for sorter cursor P1.
*/
case OP_SorterData: {
#if 0  /* local variables moved into u.bl */
  VdbeCursor *pC;
#endif /* local variables moved into u.bl */

  pOut = &aMem[pOp->p2];
  u.bl.pC = p->apCsr[pOp->p1];
  assert( isSorter(u.bl.pC) );
  rc = sqlite3VdbeSorterRowkey(u.bl.pC, pOut);
  break;
}

/* Opcode: RowData P1 P2 * * *
** Synopsis: r[P2]=data
**
** Write into register P2 the complete row data for cursor P1.
................................................................................
** it is found in the database file.
**
** If the P1 cursor must be pointing to a valid row (not a NULL row)
** of a real table, not a pseudo-table.
*/
case OP_RowKey:
case OP_RowData: {
#if 0  /* local variables moved into u.bm */
  VdbeCursor *pC;
  BtCursor *pCrsr;
  u32 n;
  i64 n64;
#endif /* local variables moved into u.bm */

  pOut = &aMem[pOp->p2];
  memAboutToChange(p, pOut);

  /* Note that RowKey and RowData are really exactly the same instruction */
  assert( pOp->p1>=0 && pOp->p1<p->nCursor );
  u.bm.pC = p->apCsr[pOp->p1];
  assert( isSorter(u.bm.pC)==0 );
  assert( u.bm.pC->isTable || pOp->opcode!=OP_RowData );
  assert( u.bm.pC->isTable==0 || pOp->opcode==OP_RowData );
  assert( u.bm.pC!=0 );
  assert( u.bm.pC->nullRow==0 );
  assert( u.bm.pC->pseudoTableReg==0 );
  assert( u.bm.pC->pCursor!=0 );
  u.bm.pCrsr = u.bm.pC->pCursor;
  assert( sqlite3BtreeCursorIsValid(u.bm.pCrsr) );

  /* The OP_RowKey and OP_RowData opcodes always follow OP_NotExists or
  ** OP_Rewind/Op_Next with no intervening instructions that might invalidate
  ** the cursor.  Hence the following sqlite3VdbeCursorMoveto() call is always
  ** a no-op and can never fail.  But we leave it in place as a safety.
  */
  assert( u.bm.pC->deferredMoveto==0 );
  rc = sqlite3VdbeCursorMoveto(u.bm.pC);
  if( NEVER(rc!=SQLITE_OK) ) goto abort_due_to_error;

  if( u.bm.pC->isTable==0 ){
    assert( !u.bm.pC->isTable );
    VVA_ONLY(rc =) sqlite3BtreeKeySize(u.bm.pCrsr, &u.bm.n64);
    assert( rc==SQLITE_OK );    /* True because of CursorMoveto() call above */
    if( u.bm.n64>db->aLimit[SQLITE_LIMIT_LENGTH] ){
      goto too_big;
    }
    u.bm.n = (u32)u.bm.n64;
  }else{
    VVA_ONLY(rc =) sqlite3BtreeDataSize(u.bm.pCrsr, &u.bm.n);
    assert( rc==SQLITE_OK );    /* DataSize() cannot fail */
    if( u.bm.n>(u32)db->aLimit[SQLITE_LIMIT_LENGTH] ){
      goto too_big;
    }
  }
  if( sqlite3VdbeMemGrow(pOut, u.bm.n, 0) ){
    goto no_mem;
  }
  pOut->n = u.bm.n;
  MemSetTypeFlag(pOut, MEM_Blob);
  if( u.bm.pC->isTable==0 ){
    rc = sqlite3BtreeKey(u.bm.pCrsr, 0, u.bm.n, pOut->z);
  }else{
    rc = sqlite3BtreeData(u.bm.pCrsr, 0, u.bm.n, pOut->z);
  }
  pOut->enc = SQLITE_UTF8;  /* In case the blob is ever cast to text */
  UPDATE_MAX_BLOBSIZE(pOut);
  REGISTER_TRACE(pOp->p2, pOut);
  break;
}

................................................................................
** P1 is currently point to.
**
** P1 can be either an ordinary table or a virtual table.  There used to
** be a separate OP_VRowid opcode for use with virtual tables, but this
** one opcode now works for both table types.
*/
case OP_Rowid: {                 /* out2-prerelease */
#if 0  /* local variables moved into u.bn */
  VdbeCursor *pC;
  i64 v;
  sqlite3_vtab *pVtab;
  const sqlite3_module *pModule;
#endif /* local variables moved into u.bn */

  assert( pOp->p1>=0 && pOp->p1<p->nCursor );
  u.bn.pC = p->apCsr[pOp->p1];
  assert( u.bn.pC!=0 );
  assert( u.bn.pC->pseudoTableReg==0 || u.bn.pC->nullRow );
  if( u.bn.pC->nullRow ){
    pOut->flags = MEM_Null;
    break;
  }else if( u.bn.pC->deferredMoveto ){
    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);

    sqlite3VtabImportErrmsg(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;
    }else{
      rc = sqlite3BtreeKeySize(u.bn.pC->pCursor, &u.bn.v);
      assert( rc==SQLITE_OK );  /* Always so because of CursorMoveto() above */
    }
  }
  pOut->u.i = u.bn.v;
  break;
}

/* Opcode: NullRow P1 * * * *
**
** Move the cursor P1 to a null row.  Any OP_Column operations
** that occur while the cursor is on the null row will always
** write a NULL.
*/
case OP_NullRow: {
#if 0  /* local variables moved into u.bo */
  VdbeCursor *pC;
#endif /* local variables moved into u.bo */

  assert( pOp->p1>=0 && pOp->p1<p->nCursor );
  u.bo.pC = p->apCsr[pOp->p1];
  assert( u.bo.pC!=0 );
  u.bo.pC->nullRow = 1;
  u.bo.pC->rowidIsValid = 0;
  u.bo.pC->cacheStatus = CACHE_STALE;
  assert( u.bo.pC->pCursor || u.bo.pC->pVtabCursor );

  if( u.bo.pC->pCursor ){
    sqlite3BtreeClearCursor(u.bo.pC->pCursor);
  }
  break;
}

/* Opcode: Last P1 P2 * * *
**
** The next use of the Rowid or Column or Next instruction for P1 
** will refer to the last entry in the database table or index.
** If the table or index is empty and P2>0, then jump immediately to P2.
** If P2 is 0 or if the table or index is not empty, fall through
** to the following instruction.
*/
case OP_Last: {        /* jump */
#if 0  /* local variables moved into u.bp */
  VdbeCursor *pC;
  BtCursor *pCrsr;
  int res;
#endif /* local variables moved into u.bp */

  assert( pOp->p1>=0 && pOp->p1<p->nCursor );
  u.bp.pC = p->apCsr[pOp->p1];
  assert( u.bp.pC!=0 );
  u.bp.pCrsr = u.bp.pC->pCursor;
  u.bp.res = 0;
  assert( u.bp.pCrsr!=0 );
  rc = sqlite3BtreeLast(u.bp.pCrsr, &u.bp.res);
  u.bp.pC->nullRow = (u8)u.bp.res;
  u.bp.pC->deferredMoveto = 0;
  u.bp.pC->rowidIsValid = 0;
  u.bp.pC->cacheStatus = CACHE_STALE;
  if( pOp->p2>0 && u.bp.res ){
    pc = pOp->p2 - 1;
  }
  break;
}


/* Opcode: Sort 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.
** If P2 is 0 or if the table or index is not empty, fall through
** to the following instruction.
*/
case OP_Rewind: {        /* jump */
#if 0  /* local variables moved into u.bq */
  VdbeCursor *pC;
  BtCursor *pCrsr;
  int res;
#endif /* local variables moved into u.bq */

  assert( pOp->p1>=0 && pOp->p1<p->nCursor );
  u.bq.pC = p->apCsr[pOp->p1];
  assert( u.bq.pC!=0 );
  assert( isSorter(u.bq.pC)==(pOp->opcode==OP_SorterSort) );
  u.bq.res = 1;
  if( isSorter(u.bq.pC) ){
    rc = sqlite3VdbeSorterRewind(db, u.bq.pC, &u.bq.res);
  }else{
    u.bq.pCrsr = u.bq.pC->pCursor;
    assert( u.bq.pCrsr );
    rc = sqlite3BtreeFirst(u.bq.pCrsr, &u.bq.res);
    u.bq.pC->deferredMoveto = 0;
    u.bq.pC->cacheStatus = CACHE_STALE;
    u.bq.pC->rowidIsValid = 0;
  }
  u.bq.pC->nullRow = (u8)u.bq.res;
  assert( pOp->p2>0 && pOp->p2<p->nOp );
  if( u.bq.res ){
    pc = pOp->p2 - 1;
  }
  break;
}

/* Opcode: Next P1 P2 * * P5
**
................................................................................
*/
/* Opcode: PrevIfOpen P1 P2 * * P5
**
** This opcode works just like OP_Prev except that if cursor P1 is not
** open it behaves a no-op.
*/
case OP_SorterNext: {  /* jump */
#if 0  /* local variables moved into u.br */
  VdbeCursor *pC;
  int res;
#endif /* local variables moved into u.br */

  u.br.pC = p->apCsr[pOp->p1];
  assert( isSorter(u.br.pC) );
  rc = sqlite3VdbeSorterNext(db, u.br.pC, &u.br.res);
  goto next_tail;
case OP_PrevIfOpen:    /* jump */
case OP_NextIfOpen:    /* jump */
  if( p->apCsr[pOp->p1]==0 ) break;
  /* Fall through */
case OP_Prev:          /* jump */
case OP_Next:          /* jump */
  assert( pOp->p1>=0 && pOp->p1<p->nCursor );
  assert( pOp->p5<ArraySize(p->aCounter) );
  u.br.pC = p->apCsr[pOp->p1];
  assert( u.br.pC!=0 );
  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 );
  assert( pOp->opcode!=OP_NextIfOpen || pOp->p4.xAdvance==sqlite3BtreeNext );
  assert( pOp->opcode!=OP_PrevIfOpen || pOp->p4.xAdvance==sqlite3BtreePrevious);
  rc = pOp->p4.xAdvance(u.br.pC->pCursor, &u.br.res);
next_tail:
  u.br.pC->cacheStatus = CACHE_STALE;
  if( u.br.res==0 ){
    u.br.pC->nullRow = 0;
    pc = pOp->p2 - 1;
    p->aCounter[pOp->p5]++;
#ifdef SQLITE_TEST
    sqlite3_search_count++;
#endif
  }else{
    u.br.pC->nullRow = 1;
  }
  u.br.pC->rowidIsValid = 0;
  goto check_for_interrupt;
}

/* Opcode: IdxInsert P1 P2 P3 * P5
** Synopsis: key=r[P2]
**
** Register P2 holds an SQL index key made using the
................................................................................
** insert is likely to be an append.
**
** This instruction only works for indices.  The equivalent instruction
** for tables is OP_Insert.
*/
case OP_SorterInsert:       /* in2 */
case OP_IdxInsert: {        /* in2 */
#if 0  /* local variables moved into u.bs */
  VdbeCursor *pC;
  BtCursor *pCrsr;
  int nKey;
  const char *zKey;
#endif /* local variables moved into u.bs */

  assert( pOp->p1>=0 && pOp->p1<p->nCursor );
  u.bs.pC = p->apCsr[pOp->p1];
  assert( u.bs.pC!=0 );
  assert( isSorter(u.bs.pC)==(pOp->opcode==OP_SorterInsert) );
  pIn2 = &aMem[pOp->p2];
  assert( pIn2->flags & MEM_Blob );
  u.bs.pCrsr = u.bs.pC->pCursor;
  if( pOp->p5 & OPFLAG_NCHANGE ) p->nChange++;
  assert( u.bs.pCrsr!=0 );
  assert( u.bs.pC->isTable==0 );
  rc = ExpandBlob(pIn2);
  if( rc==SQLITE_OK ){
    if( isSorter(u.bs.pC) ){
      rc = sqlite3VdbeSorterWrite(db, u.bs.pC, pIn2);
    }else{
      u.bs.nKey = pIn2->n;
      u.bs.zKey = pIn2->z;
      rc = sqlite3BtreeInsert(u.bs.pCrsr, u.bs.zKey, u.bs.nKey, "", 0, 0, pOp->p3,

          ((pOp->p5 & OPFLAG_USESEEKRESULT) ? u.bs.pC->seekResult : 0)
          );
      assert( u.bs.pC->deferredMoveto==0 );
      u.bs.pC->cacheStatus = CACHE_STALE;
    }
  }
  break;
}

/* Opcode: IdxDelete P1 P2 P3 * *
** Synopsis: key=r[P2@P3]
**
** The content of P3 registers starting at register P2 form
** an unpacked index key. This opcode removes that entry from the 
** index opened by cursor P1.
*/
case OP_IdxDelete: {
#if 0  /* local variables moved into u.bt */
  VdbeCursor *pC;
  BtCursor *pCrsr;
  int res;
  UnpackedRecord r;
#endif /* local variables moved into u.bt */

  assert( pOp->p3>0 );
  assert( pOp->p2>0 && pOp->p2+pOp->p3<=(p->nMem-p->nCursor)+1 );
  assert( pOp->p1>=0 && pOp->p1<p->nCursor );
  u.bt.pC = p->apCsr[pOp->p1];
  assert( u.bt.pC!=0 );
  u.bt.pCrsr = u.bt.pC->pCursor;
  assert( u.bt.pCrsr!=0 );
  assert( pOp->p5==0 );
  u.bt.r.pKeyInfo = u.bt.pC->pKeyInfo;
  u.bt.r.nField = (u16)pOp->p3;
  u.bt.r.flags = UNPACKED_PREFIX_MATCH;
  u.bt.r.aMem = &aMem[pOp->p2];
#ifdef SQLITE_DEBUG
  { int i; for(i=0; i<u.bt.r.nField; i++) assert( memIsValid(&u.bt.r.aMem[i]) ); }
#endif
  rc = sqlite3BtreeMovetoUnpacked(u.bt.pCrsr, &u.bt.r, 0, 0, &u.bt.res);
  if( rc==SQLITE_OK && u.bt.res==0 ){
    rc = sqlite3BtreeDelete(u.bt.pCrsr);
  }
  assert( u.bt.pC->deferredMoveto==0 );
  u.bt.pC->cacheStatus = CACHE_STALE;
  break;
}

/* Opcode: IdxRowid P1 P2 * * *
** Synopsis: r[P2]=rowid
**
** Write into register P2 an integer which is the last entry in the record at
** the end of the index key pointed to by cursor P1.  This integer should be
** the rowid of the table entry to which this index entry points.
**
** See also: Rowid, MakeRecord.
*/
case OP_IdxRowid: {              /* out2-prerelease */
#if 0  /* local variables moved into u.bu */
  BtCursor *pCrsr;
  VdbeCursor *pC;
  i64 rowid;
#endif /* local variables moved into u.bu */

  assert( pOp->p1>=0 && pOp->p1<p->nCursor );
  u.bu.pC = p->apCsr[pOp->p1];
  assert( u.bu.pC!=0 );
  u.bu.pCrsr = u.bu.pC->pCursor;
  assert( u.bu.pCrsr!=0 );
  pOut->flags = MEM_Null;
  rc = sqlite3VdbeCursorMoveto(u.bu.pC);
  if( NEVER(rc) ) goto abort_due_to_error;
  assert( u.bu.pC->deferredMoveto==0 );
  assert( u.bu.pC->isTable==0 );
  if( !u.bu.pC->nullRow ){

    rc = sqlite3VdbeIdxRowid(db, u.bu.pCrsr, &u.bu.rowid);
    if( rc!=SQLITE_OK ){
      goto abort_due_to_error;
    }
    pOut->u.i = u.bu.rowid;
    pOut->flags = MEM_Int;
  }
  break;
}

/* Opcode: IdxGE P1 P2 P3 P4 P5
** Synopsis: key=r[P3@P4]
................................................................................
** Otherwise fall through to the next instruction.
**
** If P5 is non-zero then the key value is increased by an epsilon prior 
** to the comparison.  This makes the opcode work like IdxLE.
*/
case OP_IdxLT:          /* jump */
case OP_IdxGE: {        /* jump */
#if 0  /* local variables moved into u.bv */
  VdbeCursor *pC;
  int res;
  UnpackedRecord r;
#endif /* local variables moved into u.bv */

  assert( pOp->p1>=0 && pOp->p1<p->nCursor );
  u.bv.pC = p->apCsr[pOp->p1];
  assert( u.bv.pC!=0 );
  assert( u.bv.pC->isOrdered );
  assert( u.bv.pC->pCursor!=0);
  assert( u.bv.pC->deferredMoveto==0 );
  assert( pOp->p5==0 || pOp->p5==1 );
  assert( pOp->p4type==P4_INT32 );
  u.bv.r.pKeyInfo = u.bv.pC->pKeyInfo;
  u.bv.r.nField = (u16)pOp->p4.i;
  if( pOp->p5 ){
    u.bv.r.flags = UNPACKED_INCRKEY | UNPACKED_PREFIX_MATCH;
  }else{
    u.bv.r.flags = UNPACKED_PREFIX_MATCH;
  }
  u.bv.r.aMem = &aMem[pOp->p3];
#ifdef SQLITE_DEBUG
  { int i; for(i=0; i<u.bv.r.nField; i++) assert( memIsValid(&u.bv.r.aMem[i]) ); }
#endif

  rc = sqlite3VdbeIdxKeyCompare(u.bv.pC, &u.bv.r, &u.bv.res);
  if( pOp->opcode==OP_IdxLT ){
    u.bv.res = -u.bv.res;
  }else{
    assert( pOp->opcode==OP_IdxGE );
    u.bv.res++;
  }
  if( u.bv.res>0 ){
    pc = pOp->p2 - 1 ;
  }
  break;
}

/* Opcode: Destroy P1 P2 P3 * *
**
................................................................................
** movement was required (because the table being dropped was already 
** the last one in the database) then a zero is stored in register P2.
** If AUTOVACUUM is disabled then a zero is stored in register P2.
**
** See also: Clear
*/
case OP_Destroy: {     /* out2-prerelease */
#if 0  /* local variables moved into u.bw */
  int iMoved;
  int iCnt;
  Vdbe *pVdbe;
  int iDb;
#endif /* local variables moved into u.bw */

  assert( p->readOnly==0 );
#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->bIsReader
     && u.bw.pVdbe->inVtabMethod<2 && u.bw.pVdbe->pc>=0
    ){
      u.bw.iCnt++;
    }
  }
#else
  u.bw.iCnt = db->nVdbeRead;
#endif
  pOut->flags = MEM_Null;
  if( u.bw.iCnt>1 ){
    rc = SQLITE_LOCKED;
    p->errorAction = OE_Abort;
  }else{
    u.bw.iDb = pOp->p3;
    assert( u.bw.iCnt==1 );
    assert( (p->btreeMask & (((yDbMask)1)<<u.bw.iDb))!=0 );

    rc = sqlite3BtreeDropTable(db->aDb[u.bw.iDb].pBt, pOp->p1, &u.bw.iMoved);
    pOut->flags = MEM_Int;
    pOut->u.i = u.bw.iMoved;
#ifndef SQLITE_OMIT_AUTOVACUUM
    if( rc==SQLITE_OK && u.bw.iMoved!=0 ){
      sqlite3RootPageMoved(db, u.bw.iDb, u.bw.iMoved, pOp->p1);
      /* All OP_Destroy operations occur on the same btree */
      assert( resetSchemaOnFault==0 || resetSchemaOnFault==u.bw.iDb+1 );
      resetSchemaOnFault = u.bw.iDb+1;
    }
#endif
  }
  break;
}

/* Opcode: Clear P1 P2 P3
................................................................................
** count is incremented by the number of rows in the table being cleared. 
** If P3 is greater than zero, then the value stored in register P3 is
** also incremented by the number of rows in the table being cleared.
**
** See also: Destroy
*/
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->readOnly==0 );
  assert( pOp->p1!=1 );
  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 ){
      assert( memIsValid(&aMem[pOp->p3]) );
      memAboutToChange(p, &aMem[pOp->p3]);
      aMem[pOp->p3].u.i += u.bx.nChange;
    }
  }
  break;
}

/* Opcode: CreateTable P1 P2 * * *
** Synopsis: r[P2]=root iDb=P1
................................................................................
** P1>1.  Write the root page number of the new table into
** register P2.
**
** See documentation on OP_CreateTable for additional information.
*/
case OP_CreateIndex:            /* out2-prerelease */
case OP_CreateTable: {          /* out2-prerelease */
#if 0  /* local variables moved into u.by */
  int pgno;
  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 );
  assert( p->readOnly==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;
  }
  rc = sqlite3BtreeCreateTable(u.by.pDb->pBt, &u.by.pgno, u.by.flags);
  pOut->u.i = u.by.pgno;
  break;
}

/* Opcode: ParseSchema P1 * * P4 *
**
** Read and parse all entries from the SQLITE_MASTER table of database P1
** that match the WHERE clause P4. 
**
** This opcode invokes the parser to create a new virtual machine,
** then runs the new virtual machine.  It is thus a re-entrant opcode.
*/
case OP_ParseSchema: {
#if 0  /* local variables moved into u.bz */
  int iDb;
  const char *zMaster;
  char *zSql;
  InitData initData;
#endif /* local variables moved into u.bz */

  /* Any prepared statement that invokes this opcode will hold mutexes
  ** on every btree.  This is a prerequisite for invoking
  ** sqlite3InitCallback().
  */
#ifdef SQLITE_DEBUG
  for(u.bz.iDb=0; u.bz.iDb<db->nDb; u.bz.iDb++){
    assert( u.bz.iDb==1 || sqlite3BtreeHoldsMutex(db->aDb[u.bz.iDb].pBt) );
  }
#endif

  u.bz.iDb = pOp->p1;
  assert( u.bz.iDb>=0 && u.bz.iDb<db->nDb );
  assert( DbHasProperty(db, u.bz.iDb, DB_SchemaLoaded) );
  /* Used to be a conditional */ {
    u.bz.zMaster = SCHEMA_TABLE(u.bz.iDb);
    u.bz.initData.db = db;
    u.bz.initData.iDb = pOp->p1;
    u.bz.initData.pzErrMsg = &p->zErrMsg;
    u.bz.zSql = sqlite3MPrintf(db,
       "SELECT name, rootpage, sql FROM '%q'.%s WHERE %s ORDER BY rowid",
       db->aDb[u.bz.iDb].zName, u.bz.zMaster, pOp->p4.z);
    if( u.bz.zSql==0 ){
      rc = SQLITE_NOMEM;
    }else{
      assert( db->init.busy==0 );
      db->init.busy = 1;
      u.bz.initData.rc = SQLITE_OK;
      assert( !db->mallocFailed );
      rc = sqlite3_exec(db, u.bz.zSql, sqlite3InitCallback, &u.bz.initData, 0);
      if( rc==SQLITE_OK ) rc = u.bz.initData.rc;
      sqlite3DbFree(db, u.bz.zSql);
      db->init.busy = 0;
    }
  }
  if( rc ) sqlite3ResetAllSchemasOfConnection(db);
  if( rc==SQLITE_NOMEM ){
    goto no_mem;
  }
  break;
}

#if !defined(SQLITE_OMIT_ANALYZE)
/* Opcode: LoadAnalysis P1 * * * *
**
** Read the sqlite_stat1 table for database P1 and load the content
** of that table into the internal index hash table.  This will cause
................................................................................
**
** If P5 is not zero, the check is done on the auxiliary database
** file, not the main database file.
**
** This opcode is used to implement the integrity_check pragma.
*/
case OP_IntegrityCk: {
#if 0  /* local variables moved into u.ca */
  int nRoot;      /* Number of tables to check.  (Number of root pages.) */
  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 */

  assert( p->bIsReader );
  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-p->nCursor) );
  u.ca.pnErr = &aMem[pOp->p3];
  assert( (u.ca.pnErr->flags & MEM_Int)!=0 );
  assert( (u.ca.pnErr->flags & (MEM_Str|MEM_Blob))==0 );
  pIn1 = &aMem[pOp->p1];
  for(u.ca.j=0; u.ca.j<u.ca.nRoot; u.ca.j++){

    u.ca.aRoot[u.ca.j] = (int)sqlite3VdbeIntValue(&pIn1[u.ca.j]);
  }
  u.ca.aRoot[u.ca.j] = 0;

  assert( pOp->p5<db->nDb );
  assert( (p->btreeMask & (((yDbMask)1)<<pOp->p5))!=0 );
  u.ca.z = sqlite3BtreeIntegrityCheck(db->aDb[pOp->p5].pBt, u.ca.aRoot, u.ca.nRoot,
                                 (int)u.ca.pnErr->u.i, &u.ca.nErr);
  sqlite3DbFree(db, u.ca.aRoot);
  u.ca.pnErr->u.i -= u.ca.nErr;
  sqlite3VdbeMemSetNull(pIn1);
  if( u.ca.nErr==0 ){
    assert( u.ca.z==0 );
  }else if( u.ca.z==0 ){
    goto no_mem;
  }else{
    sqlite3VdbeMemSetStr(pIn1, u.ca.z, -1, SQLITE_UTF8, sqlite3_free);
  }
  UPDATE_MAX_BLOBSIZE(pIn1);
  sqlite3VdbeChangeEncoding(pIn1, encoding);
  break;
}
#endif /* SQLITE_OMIT_INTEGRITY_CHECK */

................................................................................
** Synopsis:  r[P3]=rowset(P1)
**
** Extract the smallest value from boolean index P1 and put that value into
** 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 */

  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);
  }
  goto check_for_interrupt;
}

/* Opcode: RowSetTest P1 P2 P3 P4
** Synopsis: if r[P3] in rowset(P1) goto P2
**
................................................................................
** (b) when P4==-1 there is no need to insert the value, as it will
** never be tested for, and (c) when a value that is part of set X is
** inserted, there is no need to search to see if the same value was
** previously inserted as part of set X (only if it was previously
** inserted as part of some other set).
*/
case OP_RowSetTest: {                     /* jump, in1, in3 */
#if 0  /* local variables moved into u.cc */
  int iSet;
  int exists;
#endif /* local variables moved into u.cc */

  pIn1 = &aMem[pOp->p1];
  pIn3 = &aMem[pOp->p3];
  u.cc.iSet = pOp->p4.i;
  assert( pIn3->flags&MEM_Int );

  /* If there is anything other than a rowset object in memory cell P1,
  ** delete it now and initialize P1 with an empty rowset
  */
  if( (pIn1->flags & MEM_RowSet)==0 ){
    sqlite3VdbeMemSetRowSet(pIn1);
    if( (pIn1->flags & MEM_RowSet)==0 ) goto no_mem;
  }

  assert( pOp->p4type==P4_INT32 );
  assert( u.cc.iSet==-1 || u.cc.iSet>=0 );
  if( u.cc.iSet ){
    u.cc.exists = sqlite3RowSetTest(pIn1->u.pRowSet,
                               (u8)(u.cc.iSet>=0 ? u.cc.iSet & 0xf : 0xff),
                               pIn3->u.i);
    if( u.cc.exists ){
      pc = pOp->p2 - 1;
      break;
    }
  }
  if( u.cc.iSet>=0 ){
    sqlite3RowSetInsert(pIn1->u.pRowSet, pIn3->u.i);
  }
  break;
}


#ifndef SQLITE_OMIT_TRIGGER
................................................................................
** exception using the RAISE() function. Register P3 contains the address 
** of a memory cell in this (the parent) VM that is used to allocate the 
** memory required by the sub-vdbe at runtime.
**
** P4 is a pointer to the VM containing the trigger program.
*/
case OP_Program: {        /* jump */
#if 0  /* local variables moved into u.cd */
  int nMem;               /* Number of memory registers for sub-program */
  int nByte;              /* Bytes of runtime space required for sub-program */
  Mem *pRt;               /* Register to allocate runtime space */
  Mem *pMem;              /* Used to iterate through memory cells */
  Mem *pEnd;              /* Last memory cell in new array */
  VdbeFrame *pFrame;      /* New vdbe frame to execute in */
  SubProgram *pProgram;   /* Sub-program to execute */
  void *t;                /* Token identifying trigger */
#endif /* local variables moved into u.cd */

  u.cd.pProgram = pOp->p4.pProgram;
  u.cd.pRt = &aMem[pOp->p3];
  assert( u.cd.pProgram->nOp>0 );

  /* If the p5 flag is clear, then recursive invocation of triggers is
  ** disabled for backwards compatibility (p5 is set if this sub-program
  ** is really a trigger, not a foreign key action, and the flag set
  ** and cleared by the "PRAGMA recursive_triggers" command is clear).
  **
  ** It is recursive invocation of triggers, at the SQL level, that is
  ** disabled. In some cases a single trigger may generate more than one
  ** SubProgram (if the trigger may be executed with more than one different
  ** ON CONFLICT algorithm). SubProgram structures associated with a
  ** single trigger all have the same value for the SubProgram.token
  ** variable.  */
  if( pOp->p5 ){
    u.cd.t = u.cd.pProgram->token;
    for(u.cd.pFrame=p->pFrame; u.cd.pFrame && u.cd.pFrame->token!=u.cd.t; u.cd.pFrame=u.cd.pFrame->pParent);
    if( u.cd.pFrame ) break;
  }

  if( p->nFrame>=db->aLimit[SQLITE_LIMIT_TRIGGER_DEPTH] ){
    rc = SQLITE_ERROR;
    sqlite3SetString(&p->zErrMsg, db, "too many levels of trigger recursion");
    break;
  }

  /* Register u.cd.pRt is used to store the memory required to save the state
  ** of the current program, and the memory required at runtime to execute
  ** the trigger program. If this trigger has been fired before, then u.cd.pRt
  ** is already allocated. Otherwise, it must be initialized.  */
  if( (u.cd.pRt->flags&MEM_Frame)==0 ){
    /* SubProgram.nMem is set to the number of memory cells used by the
    ** program stored in SubProgram.aOp. As well as these, one memory
    ** cell is required for each cursor used by the program. Set local
    ** variable u.cd.nMem (and later, VdbeFrame.nChildMem) to this value.
    */
    u.cd.nMem = u.cd.pProgram->nMem + u.cd.pProgram->nCsr;
    u.cd.nByte = ROUND8(sizeof(VdbeFrame))
              + u.cd.nMem * sizeof(Mem)
              + u.cd.pProgram->nCsr * sizeof(VdbeCursor *)
              + u.cd.pProgram->nOnce * sizeof(u8);
    u.cd.pFrame = sqlite3DbMallocZero(db, u.cd.nByte);
    if( !u.cd.pFrame ){
      goto no_mem;
    }
    sqlite3VdbeMemRelease(u.cd.pRt);
    u.cd.pRt->flags = MEM_Frame;
    u.cd.pRt->u.pFrame = u.cd.pFrame;

    u.cd.pFrame->v = p;
    u.cd.pFrame->nChildMem = u.cd.nMem;
    u.cd.pFrame->nChildCsr = u.cd.pProgram->nCsr;
    u.cd.pFrame->pc = pc;
    u.cd.pFrame->aMem = p->aMem;
    u.cd.pFrame->nMem = p->nMem;
    u.cd.pFrame->apCsr = p->apCsr;
    u.cd.pFrame->nCursor = p->nCursor;
    u.cd.pFrame->aOp = p->aOp;
    u.cd.pFrame->nOp = p->nOp;
    u.cd.pFrame->token = u.cd.pProgram->token;
    u.cd.pFrame->aOnceFlag = p->aOnceFlag;
    u.cd.pFrame->nOnceFlag = p->nOnceFlag;

    u.cd.pEnd = &VdbeFrameMem(u.cd.pFrame)[u.cd.pFrame->nChildMem];
    for(u.cd.pMem=VdbeFrameMem(u.cd.pFrame); u.cd.pMem!=u.cd.pEnd; u.cd.pMem++){
      u.cd.pMem->flags = MEM_Invalid;
      u.cd.pMem->db = db;
    }
  }else{
    u.cd.pFrame = u.cd.pRt->u.pFrame;
    assert( u.cd.pProgram->nMem+u.cd.pProgram->nCsr==u.cd.pFrame->nChildMem );
    assert( u.cd.pProgram->nCsr==u.cd.pFrame->nChildCsr );
    assert( pc==u.cd.pFrame->pc );
  }

  p->nFrame++;
  u.cd.pFrame->pParent = p->pFrame;
  u.cd.pFrame->lastRowid = lastRowid;
  u.cd.pFrame->nChange = p->nChange;
  p->nChange = 0;
  p->pFrame = u.cd.pFrame;
  p->aMem = aMem = &VdbeFrameMem(u.cd.pFrame)[-1];
  p->nMem = u.cd.pFrame->nChildMem;
  p->nCursor = (u16)u.cd.pFrame->nChildCsr;
  p->apCsr = (VdbeCursor **)&aMem[p->nMem+1];
  p->aOp = aOp = u.cd.pProgram->aOp;
  p->nOp = u.cd.pProgram->nOp;
  p->aOnceFlag = (u8 *)&p->apCsr[p->nCursor];
  p->nOnceFlag = u.cd.pProgram->nOnce;
  pc = -1;
  memset(p->aOnceFlag, 0, p->nOnceFlag);

  break;
}

/* Opcode: Param P1 P2 * * *
................................................................................
** and old.* values.
**
** The address of the cell in the parent frame is determined by adding
** the value of the P1 argument to the value of the P1 argument to the
** calling OP_Program instruction.
*/
case OP_Param: {           /* out2-prerelease */
#if 0  /* local variables moved into u.ce */
  VdbeFrame *pFrame;
  Mem *pIn;
#endif /* local variables moved into u.ce */
  u.ce.pFrame = p->pFrame;
  u.ce.pIn = &u.ce.pFrame->aMem[pOp->p1 + u.ce.pFrame->aOp[u.ce.pFrame->pc].p1];

  sqlite3VdbeMemShallowCopy(pOut, u.ce.pIn, MEM_Ephem);
  break;
}

#endif /* #ifndef SQLITE_OMIT_TRIGGER */

#ifndef SQLITE_OMIT_FOREIGN_KEY
/* Opcode: FkCounter P1 P2 * * *
................................................................................
** within a sub-program). Set the value of register P1 to the maximum of 
** its current value and the value in register P2.
**
** This instruction throws an error if the memory cell is not initially
** an integer.
*/
case OP_MemMax: {        /* in2 */
#if 0  /* local variables moved into u.cf */
  Mem *pIn1;
  VdbeFrame *pFrame;
#endif /* local variables moved into u.cf */
  if( p->pFrame ){
    for(u.cf.pFrame=p->pFrame; u.cf.pFrame->pParent; u.cf.pFrame=u.cf.pFrame->pParent);

    u.cf.pIn1 = &u.cf.pFrame->aMem[pOp->p1];
  }else{
    u.cf.pIn1 = &aMem[pOp->p1];
  }
  assert( memIsValid(u.cf.pIn1) );
  sqlite3VdbeMemIntegerify(u.cf.pIn1);
  pIn2 = &aMem[pOp->p2];
  sqlite3VdbeMemIntegerify(pIn2);
  if( u.cf.pIn1->u.i<pIn2->u.i){
    u.cf.pIn1->u.i = pIn2->u.i;
  }
  break;
}
#endif /* SQLITE_OMIT_AUTOINCREMENT */

/* Opcode: IfPos P1 P2 * * *
** Synopsis: if r[P1]>0 goto P2
................................................................................
** structure that specifies the function.  Use register
** P3 as the accumulator.
**
** The P5 arguments are taken from register P2 and its
** successors.
*/
case OP_AggStep: {
#if 0  /* local variables moved into u.cg */
  int n;
  int i;
  Mem *pMem;
  Mem *pRec;
  sqlite3_context ctx;
  sqlite3_value **apVal;
#endif /* local variables moved into u.cg */

  u.cg.n = pOp->p5;
  assert( u.cg.n>=0 );
  u.cg.pRec = &aMem[pOp->p2];
  u.cg.apVal = p->apArg;

  assert( u.cg.apVal || u.cg.n==0 );
  for(u.cg.i=0; u.cg.i<u.cg.n; u.cg.i++, u.cg.pRec++){
    assert( memIsValid(u.cg.pRec) );
    u.cg.apVal[u.cg.i] = u.cg.pRec;

    memAboutToChange(p, u.cg.pRec);
    sqlite3VdbeMemStoreType(u.cg.pRec);
  }
  u.cg.ctx.pFunc = pOp->p4.pFunc;
  assert( pOp->p3>0 && pOp->p3<=(p->nMem-p->nCursor) );
  u.cg.ctx.pMem = u.cg.pMem = &aMem[pOp->p3];
  u.cg.pMem->n++;
  u.cg.ctx.s.flags = MEM_Null;
  u.cg.ctx.s.z = 0;
  u.cg.ctx.s.zMalloc = 0;
  u.cg.ctx.s.xDel = 0;
  u.cg.ctx.s.db = db;
  u.cg.ctx.isError = 0;
  u.cg.ctx.pColl = 0;
  u.cg.ctx.skipFlag = 0;
  if( u.cg.ctx.pFunc->funcFlags & SQLITE_FUNC_NEEDCOLL ){
    assert( pOp>p->aOp );
    assert( pOp[-1].p4type==P4_COLLSEQ );
    assert( pOp[-1].opcode==OP_CollSeq );
    u.cg.ctx.pColl = pOp[-1].p4.pColl;
  }
  (u.cg.ctx.pFunc->xStep)(&u.cg.ctx, u.cg.n, u.cg.apVal); /* IMP: R-24505-23230 */
  if( u.cg.ctx.isError ){
    sqlite3SetString(&p->zErrMsg, db, "%s", sqlite3_value_text(&u.cg.ctx.s));
    rc = u.cg.ctx.isError;
  }
  if( u.cg.ctx.skipFlag ){
    assert( pOp[-1].opcode==OP_CollSeq );
    u.cg.i = pOp[-1].p1;
    if( u.cg.i ) sqlite3VdbeMemSetInt64(&aMem[u.cg.i], 1);
  }

  sqlite3VdbeMemRelease(&u.cg.ctx.s);

  break;
}

/* Opcode: AggFinal P1 P2 * P4 *
** Synopsis: accum=r[P1] N=P2
**
................................................................................
** P4 is a pointer to the FuncDef for this function.  The P2
** argument is not used by this opcode.  It is only there to disambiguate
** functions that can take varying numbers of arguments.  The
** P4 argument is only needed for the degenerate case where
** the step function was not previously called.
*/
case OP_AggFinal: {
#if 0  /* local variables moved into u.ch */
  Mem *pMem;
#endif /* local variables moved into u.ch */
  assert( pOp->p1>0 && pOp->p1<=(p->nMem-p->nCursor) );
  u.ch.pMem = &aMem[pOp->p1];
  assert( (u.ch.pMem->flags & ~(MEM_Null|MEM_Agg))==0 );
  rc = sqlite3VdbeMemFinalize(u.ch.pMem, pOp->p4.pFunc);
  if( rc ){
    sqlite3SetString(&p->zErrMsg, db, "%s", sqlite3_value_text(u.ch.pMem));
  }
  sqlite3VdbeChangeEncoding(u.ch.pMem, encoding);
  UPDATE_MAX_BLOBSIZE(u.ch.pMem);
  if( sqlite3VdbeMemTooBig(u.ch.pMem) ){
    goto too_big;
  }
  break;
}

#ifndef SQLITE_OMIT_WAL
/* Opcode: Checkpoint P1 P2 P3 * *
................................................................................
** SQLITE_BUSY or not, respectively.  Write the number of pages in the
** WAL after the checkpoint into mem[P3+1] and the number of pages
** in the WAL that have been checkpointed after the checkpoint
** completes into mem[P3+2].  However on an error, mem[P3+1] and
** mem[P3+2] are initialized to -1.
*/
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 */

  assert( p->readOnly==0 );
  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]);
  if( rc==SQLITE_BUSY ){
    rc = SQLITE_OK;
    u.ci.aRes[0] = 1;
  }
  for(u.ci.i=0, u.ci.pMem = &aMem[pOp->p3]; u.ci.i<3; u.ci.i++, u.ci.pMem++){
    sqlite3VdbeMemSetInt64(u.ci.pMem, (i64)u.ci.aRes[u.ci.i]);
  }
  break;
};  
#endif

#ifndef SQLITE_OMIT_PRAGMA
/* Opcode: JournalMode P1 P2 P3 * P5
**
................................................................................
** operation. No IO is required.
**
** If changing into or out of WAL mode the procedure is more complicated.
**
** Write a string containing the final journal-mode to register P2.
*/
case OP_JournalMode: {    /* out2-prerelease */
#if 0  /* local variables moved into u.cj */
  Btree *pBt;                     /* Btree to change journal mode of */
  Pager *pPager;                  /* Pager associated with pBt */
  int eNew;                       /* New journal mode */
  int eOld;                       /* The old journal mode */
#ifndef SQLITE_OMIT_WAL
  const char *zFilename;          /* Name of database file for pPager */
#endif
#endif /* local variables moved into u.cj */

  u.cj.eNew = pOp->p3;
  assert( u.cj.eNew==PAGER_JOURNALMODE_DELETE
       || u.cj.eNew==PAGER_JOURNALMODE_TRUNCATE
       || 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 );
  assert( p->readOnly==0 );

  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;

#ifndef SQLITE_OMIT_WAL
  u.cj.zFilename = sqlite3PagerFilename(u.cj.pPager, 1);

  /* Do not allow a transition to journal_mode=WAL for a database
  ** in temporary storage or if the VFS does not support shared memory
  */
  if( u.cj.eNew==PAGER_JOURNALMODE_WAL
   && (sqlite3Strlen30(u.cj.zFilename)==0           /* Temp file */
       || !sqlite3PagerWalSupported(u.cj.pPager))   /* No shared-memory support */
  ){
    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->nVdbeRead>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{

      if( u.cj.eOld==PAGER_JOURNALMODE_WAL ){
        /* If leaving WAL mode, close the log file. If successful, the call
        ** to PagerCloseWal() checkpoints and deletes the write-ahead-log
        ** file. An EXCLUSIVE lock may still be held on the database file
        ** after a successful return.
        */
        rc = sqlite3PagerCloseWal(u.cj.pPager);
        if( rc==SQLITE_OK ){
          sqlite3PagerSetJournalMode(u.cj.pPager, u.cj.eNew);
        }
      }else if( u.cj.eOld==PAGER_JOURNALMODE_MEMORY ){
        /* Cannot transition directly from MEMORY to WAL.  Use mode OFF
        ** as an intermediate */
        sqlite3PagerSetJournalMode(u.cj.pPager, PAGER_JOURNALMODE_OFF);
      }

      /* Open a transaction on the database file. Regardless of the journal
      ** mode, this transaction always uses a rollback journal.
      */
      assert( sqlite3BtreeIsInTrans(u.cj.pBt)==0 );
      if( rc==SQLITE_OK ){
        rc = sqlite3BtreeSetVersion(u.cj.pBt, (u.cj.eNew==PAGER_JOURNALMODE_WAL ? 2 : 1));
      }
    }
  }
#endif /* ifndef SQLITE_OMIT_WAL */

  if( rc ){
    u.cj.eNew = u.cj.eOld;
  }
  u.cj.eNew = sqlite3PagerSetJournalMode(u.cj.pPager, u.cj.eNew);

  pOut = &aMem[pOp->p2];
  pOut->flags = MEM_Str|MEM_Static|MEM_Term;
  pOut->z = (char *)sqlite3JournalModename(u.cj.eNew);
  pOut->n = sqlite3Strlen30(pOut->z);
  pOut->enc = SQLITE_UTF8;
  sqlite3VdbeChangeEncoding(pOut, encoding);
  break;
};
#endif /* SQLITE_OMIT_PRAGMA */

................................................................................
/* Opcode: IncrVacuum P1 P2 * * *
**
** Perform a single step of the incremental vacuum procedure on
** the P1 database. If the vacuum has finished, jump to instruction
** P2. Otherwise, fall through to the next instruction.
*/
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 );
  assert( p->readOnly==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;
}
#endif
................................................................................
** xBegin method for that table.
**
** Also, whether or not P4 is set, check that this is not being called from
** within a callback to a virtual table xSync() method. If it is, the error
** code will be set to SQLITE_LOCKED.
*/
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 ) sqlite3VtabImportErrmsg(p, u.cl.pVTab->pVtab);
  break;
}
#endif /* SQLITE_OMIT_VIRTUALTABLE */

#ifndef SQLITE_OMIT_VIRTUALTABLE
/* Opcode: VCreate P1 * * P4 *
**
................................................................................
/* Opcode: VOpen P1 * * P4 *
**
** P4 is a pointer to a virtual table object, an sqlite3_vtab structure.
** P1 is a cursor number.  This opcode opens a cursor to the virtual
** table and stores that cursor in P1.
*/
case OP_VOpen: {
#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 */

  assert( p->bIsReader );
  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);
  sqlite3VtabImportErrmsg(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.cm.pCur->pVtabCursor = u.cm.pVtabCursor;
    }else{
      db->mallocFailed = 1;
      u.cm.pModule->xClose(u.cm.pVtabCursor);
    }
  }
  break;
}
#endif /* SQLITE_OMIT_VIRTUALTABLE */

#ifndef SQLITE_OMIT_VIRTUALTABLE
................................................................................
** xFilter method. Registers P3+2..P3+1+argc are the argc
** additional parameters which are passed to
** xFilter as argv. Register P3+2 becomes argv[0] when passed to xFilter.
**
** A jump is made to P2 if the result set after filtering would be empty.
*/
case OP_VFilter: {   /* jump */
#if 0  /* local variables moved into u.cn */
  int nArg;
  int iQuery;
  const sqlite3_module *pModule;
  Mem *pQuery;
  Mem *pArgc;
  sqlite3_vtab_cursor *pVtabCursor;
  sqlite3_vtab *pVtab;
  VdbeCursor *pCur;
  int res;
  int i;
  Mem **apArg;
#endif /* local variables moved into u.cn */

  u.cn.pQuery = &aMem[pOp->p3];
  u.cn.pArgc = &u.cn.pQuery[1];
  u.cn.pCur = p->apCsr[pOp->p1];
  assert( memIsValid(u.cn.pQuery) );
  REGISTER_TRACE(pOp->p3, u.cn.pQuery);
  assert( u.cn.pCur->pVtabCursor );
  u.cn.pVtabCursor = u.cn.pCur->pVtabCursor;
  u.cn.pVtab = u.cn.pVtabCursor->pVtab;
  u.cn.pModule = u.cn.pVtab->pModule;

  /* Grab the index number and argc parameters */
  assert( (u.cn.pQuery->flags&MEM_Int)!=0 && u.cn.pArgc->flags==MEM_Int );
  u.cn.nArg = (int)u.cn.pArgc->u.i;
  u.cn.iQuery = (int)u.cn.pQuery->u.i;

  /* Invoke the xFilter method */
  {
    u.cn.res = 0;
    u.cn.apArg = p->apArg;
    for(u.cn.i = 0; u.cn.i<u.cn.nArg; u.cn.i++){
      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;
    sqlite3VtabImportErrmsg(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;
    }
  }
  u.cn.pCur->nullRow = 0;

  break;
}
#endif /* SQLITE_OMIT_VIRTUALTABLE */

#ifndef SQLITE_OMIT_VIRTUALTABLE
/* Opcode: VColumn P1 P2 P3 * *
................................................................................
** Synopsis: r[P3]=vcolumn(P2)
**
** Store the value of the P2-th column of
** the row of the virtual-table that the 
** P1 cursor is pointing to into register P3.
*/
case OP_VColumn: {
#if 0  /* local variables moved into u.co */
  sqlite3_vtab *pVtab;
  const sqlite3_module *pModule;
  Mem *pDest;
  sqlite3_context sContext;
#endif /* local variables moved into u.co */

  VdbeCursor *pCur = p->apCsr[pOp->p1];
  assert( pCur->pVtabCursor );
  assert( pOp->p3>0 && pOp->p3<=(p->nMem-p->nCursor) );
  u.co.pDest = &aMem[pOp->p3];
  memAboutToChange(p, u.co.pDest);
  if( pCur->nullRow ){
    sqlite3VdbeMemSetNull(u.co.pDest);
    break;
  }
  u.co.pVtab = pCur->pVtabCursor->pVtab;
  u.co.pModule = u.co.pVtab->pModule;
  assert( u.co.pModule->xColumn );
  memset(&u.co.sContext, 0, sizeof(u.co.sContext));

  /* The output cell may already have a buffer allocated. Move
  ** the current contents to u.co.sContext.s so in case the user-function
  ** 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);
  sqlite3VtabImportErrmsg(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.
  */
  sqlite3VdbeChangeEncoding(&u.co.sContext.s, encoding);
  sqlite3VdbeMemMove(u.co.pDest, &u.co.sContext.s);
  REGISTER_TRACE(pOp->p3, u.co.pDest);
  UPDATE_MAX_BLOBSIZE(u.co.pDest);

  if( sqlite3VdbeMemTooBig(u.co.pDest) ){
    goto too_big;
  }
  break;
}
#endif /* SQLITE_OMIT_VIRTUALTABLE */

#ifndef SQLITE_OMIT_VIRTUALTABLE
................................................................................
/* Opcode: VNext P1 P2 * * *
**
** Advance virtual table P1 to the next row in its result set and
** jump to instruction P2.  Or, if the virtual table has reached
** the end of its result set, then fall through to the next instruction.
*/
case OP_VNext: {   /* jump */
#if 0  /* local variables moved into u.cp */
  sqlite3_vtab *pVtab;
  const sqlite3_module *pModule;
  int res;
  VdbeCursor *pCur;
#endif /* local variables moved into u.cp */

  u.cp.res = 0;
  u.cp.pCur = p->apCsr[pOp->p1];
  assert( u.cp.pCur->pVtabCursor );
  if( u.cp.pCur->nullRow ){
    break;
  }
  u.cp.pVtab = u.cp.pCur->pVtabCursor->pVtab;
  u.cp.pModule = u.cp.pVtab->pModule;
  assert( u.cp.pModule->xNext );

  /* Invoke the xNext() method of the module. There is no way for the
  ** underlying implementation to return an error if one occurs during
  ** 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;
  sqlite3VtabImportErrmsg(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;
  }
  goto check_for_interrupt;
}
#endif /* SQLITE_OMIT_VIRTUALTABLE */

................................................................................
/* Opcode: VRename P1 * * P4 *
**
** P4 is a pointer to a virtual table object, an sqlite3_vtab structure.
** This opcode invokes the corresponding xRename method. The value
** in register P1 is passed as the zName argument to the xRename method.
*/
case OP_VRename: {
#if 0  /* local variables moved into u.cq */
  sqlite3_vtab *pVtab;
  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) );
  assert( p->readOnly==0 );
  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);
    sqlite3VtabImportErrmsg(p, u.cq.pVtab);
    p->expired = 0;
  }
  break;
}
#endif

#ifndef SQLITE_OMIT_VIRTUALTABLE
................................................................................
** a row to delete.
**
** P1 is a boolean flag. If it is set to true and the xUpdate call
** is successful, then the value returned by sqlite3_last_insert_rowid() 
** is set to the value of the rowid for the row just inserted.
*/
case OP_VUpdate: {
#if 0  /* local variables moved into u.cr */
  sqlite3_vtab *pVtab;
  sqlite3_module *pModule;
  int nArg;
  int i;
  sqlite_int64 rowid;
  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
  );
  assert( p->readOnly==0 );
  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;
    u.cr.pX = &aMem[pOp->p3];
    for(u.cr.i=0; u.cr.i<u.cr.nArg; u.cr.i++){
      assert( memIsValid(u.cr.pX) );
      memAboutToChange(p, u.cr.pX);
      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;
    sqlite3VtabImportErrmsg(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;
      }else{
        p->errorAction = ((pOp->p5==OE_Replace) ? OE_Abort : pOp->p5);
      }
................................................................................
#ifndef SQLITE_OMIT_TRACE
/* Opcode: Trace * * * P4 *
**
** If tracing is enabled (by the sqlite3_trace()) interface, then
** the UTF-8 string contained in P4 is emitted on the trace callback.
*/
case OP_Trace: {
#if 0  /* local variables moved into u.cs */
  char *zTrace;
  char *z;
#endif /* local variables moved into u.cs */

  if( db->xTrace
   && !p->doingRerun
   && (u.cs.zTrace = (pOp->p4.z ? pOp->p4.z : p->zSql))!=0
  ){
    u.cs.z = sqlite3VdbeExpandSql(p, u.cs.zTrace);
    db->xTrace(db->pTraceArg, u.cs.z);
    sqlite3DbFree(db, u.cs.z);
  }
#ifdef SQLITE_USE_FCNTL_TRACE
  u.cs.zTrace = (pOp->p4.z ? pOp->p4.z : p->zSql);
  if( u.cs.zTrace ){
    int i;
    for(i=0; i<db->nDb; i++){
      if( ((1<<i) & p->btreeMask)==0 ) continue;
      sqlite3_file_control(db, db->aDb[i].zName, SQLITE_FCNTL_TRACE, u.cs.zTrace);
    }
  }
#endif /* SQLITE_USE_FCNTL_TRACE */
#ifdef SQLITE_DEBUG
  if( (db->flags & SQLITE_SqlTrace)!=0
   && (u.cs.zTrace = (pOp->p4.z ? pOp->p4.z : p->zSql))!=0
  ){
    sqlite3DebugPrintf("SQL-trace: %s\n", u.cs.zTrace);
  }
#endif /* SQLITE_DEBUG */
  break;
}
#endif


................................................................................
abort_due_to_interrupt:
  assert( db->u1.isInterrupted );
  rc = SQLITE_INTERRUPT;
  p->rc = rc;
  sqlite3SetString(&p->zErrMsg, db, "%s", sqlite3ErrStr(rc));
  goto vdbe_error_halt;
}


/************** End of vdbe.c ************************************************/
/************** Begin file vdbeblob.c ****************************************/
/*
** 2007 May 1
**
** The author disclaims copyright to this source code.  In place of
................................................................................
        zErr = sqlite3MPrintf(db, "cannot open %s column for writing", zFault);
        rc = SQLITE_ERROR;
        sqlite3BtreeLeaveAll(db);
        goto blob_open_out;
      }
    }

    pBlob->pStmt = (sqlite3_stmt *)sqlite3VdbeCreate(db);
    assert( pBlob->pStmt || db->mallocFailed );
    if( pBlob->pStmt ){
      Vdbe *v = (Vdbe *)pBlob->pStmt;
      int iDb = sqlite3SchemaToIndex(db, pTab->pSchema);

      sqlite3VdbeAddOpList(v, sizeof(openBlob)/sizeof(VdbeOpList), openBlob);

................................................................................
  }
  return WRC_Continue;
} 

/*
** Call sqlite3WalkExpr() for every expression in Select statement p.
** Invoke sqlite3WalkSelect() for subqueries in the FROM clause and
** on the compound select chain, p->pPrior.  Invoke the xSelectCallback()




** either before or after the walk of expressions and FROM clause, depending
** on whether pWalker->bSelectDepthFirst is false or true, respectively.
**
** Return WRC_Continue under normal conditions.  Return WRC_Abort if
** there is an abort request.
**
** If the Walker does not have an xSelectCallback() then this routine
** is a no-op returning WRC_Continue.
*/
SQLITE_PRIVATE int sqlite3WalkSelect(Walker *pWalker, Select *p){
  int rc;

  if( p==0 || pWalker->xSelectCallback==0 ) return WRC_Continue;

  rc = WRC_Continue;
  pWalker->walkerDepth++;
  while( p ){
    if( !pWalker->bSelectDepthFirst ){
       rc = pWalker->xSelectCallback(pWalker, p);
       if( rc ) break;
    }
    if( sqlite3WalkSelectExpr(pWalker, p)
     || sqlite3WalkSelectFrom(pWalker, p)
    ){
      pWalker->walkerDepth--;
      return WRC_Abort;
    }
    if( pWalker->bSelectDepthFirst ){
      rc = pWalker->xSelectCallback(pWalker, p);
      /* Depth-first search is currently only used for
      ** selectAddSubqueryTypeInfo() and that routine always returns
      ** WRC_Continue (0).  So the following branch is never taken. */
      if( NEVER(rc) ) break;
    }
    p = p->pPrior;
  }
  pWalker->walkerDepth--;
  return rc & WRC_Abort;
}

................................................................................
  if( p ) {
    sqlite3ExprCheckHeight(pParse, p->nHeight);
  }
  return p;
}

/*
** Return 1 if an expression must be FALSE in all cases and 0 if the



** expression might be true.  This is an optimization.  If is OK to
** return 0 here even if the expression really is always false (a 
** false negative).  But it is a bug to return 1 if the expression
** might be true in some rare circumstances (a false positive.)
**
** Note that if the expression is part of conditional for a
** LEFT JOIN, then we cannot determine at compile-time whether or not
** is it true or false, so always return 0.
*/






static int exprAlwaysFalse(Expr *p){
  int v = 0;
  if( ExprHasProperty(p, EP_FromJoin) ) return 0;
  if( !sqlite3ExprIsInteger(p, &v) ) return 0;
  return v==0;
}

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

    }
  }
  return pNew;
}




























/*
** The following group of routines make deep copies of expressions,
** expression lists, ID lists, and select statements.  The copies can
** be deleted (by being passed to their respective ...Delete() routines)
** without effecting the originals.
**
** The expression list, ID, and source lists return by sqlite3ExprListDup(),
................................................................................
    pNewItem->zAlias = sqlite3DbStrDup(db, pOldItem->zAlias);
    pNewItem->jointype = pOldItem->jointype;
    pNewItem->iCursor = pOldItem->iCursor;
    pNewItem->addrFillSub = pOldItem->addrFillSub;
    pNewItem->regReturn = pOldItem->regReturn;
    pNewItem->isCorrelated = pOldItem->isCorrelated;
    pNewItem->viaCoroutine = pOldItem->viaCoroutine;

    pNewItem->zIndex = sqlite3DbStrDup(db, pOldItem->zIndex);
    pNewItem->notIndexed = pOldItem->notIndexed;
    pNewItem->pIndex = pOldItem->pIndex;
    pTab = pNewItem->pTab = pOldItem->pTab;
    if( pTab ){
      pTab->nRef++;
    }
................................................................................
  pNew->iLimit = 0;
  pNew->iOffset = 0;
  pNew->selFlags = p->selFlags & ~SF_UsesEphemeral;
  pNew->pRightmost = 0;
  pNew->addrOpenEphm[0] = -1;
  pNew->addrOpenEphm[1] = -1;
  pNew->addrOpenEphm[2] = -1;

  return pNew;
}
#else
SQLITE_PRIVATE Select *sqlite3SelectDup(sqlite3 *db, Select *p, int flags){
  assert( p==0 );
  return 0;
}
................................................................................
    assert( p->pEList->a[0].pExpr!=0 ); /* Because of isCandidateForInOpt(p) */
    assert( p->pSrc!=0 );               /* Because of isCandidateForInOpt(p) */
    pTab = p->pSrc->a[0].pTab;
    pExpr = p->pEList->a[0].pExpr;
    iCol = (i16)pExpr->iColumn;
   
    /* Code an OP_VerifyCookie and OP_TableLock for <table>. */

    iDb = sqlite3SchemaToIndex(db, pTab->pSchema);
    sqlite3CodeVerifySchema(pParse, iDb);
    sqlite3TableLock(pParse, iDb, pTab->tnum, 0, pTab->zName);


    /* This function is only called from two places. In both cases the vdbe
    ** has already been allocated. So assume sqlite3GetVdbe() is always
    ** successful here.
    */
    assert(v);
    if( iCol<0 ){
................................................................................
/*
** Remember the current column cache context.  Any new entries added
** added to the column cache after this call are removed when the
** corresponding pop occurs.
*/
SQLITE_PRIVATE void sqlite3ExprCachePush(Parse *pParse){
  pParse->iCacheLevel++;





}

/*
** Remove from the column cache any entries that were added since the
** the previous N Push operations.  In other words, restore the cache
** to the state it was in N Pushes ago.
*/
SQLITE_PRIVATE void sqlite3ExprCachePop(Parse *pParse, int N){
  int i;
  struct yColCache *p;
  assert( N>0 );
  assert( pParse->iCacheLevel>=N );
  pParse->iCacheLevel -= N;





  for(i=0, p=pParse->aColCache; i<SQLITE_N_COLCACHE; i++, p++){
    if( p->iReg && p->iLevel>pParse->iCacheLevel ){
      cacheEntryClear(pParse, p);
      p->iReg = 0;
    }
  }
}
................................................................................
/*
** Clear all column cache entries.
*/
SQLITE_PRIVATE void sqlite3ExprCacheClear(Parse *pParse){
  int i;
  struct yColCache *p;






  for(i=0, p=pParse->aColCache; i<SQLITE_N_COLCACHE; i++, p++){
    if( p->iReg ){
      cacheEntryClear(pParse, p);
      p->iReg = 0;
    }
  }
}
................................................................................
  for(pItem=pList->a, i=0; i<n; i++, pItem++){
    Expr *pExpr = pItem->pExpr;
    if( (flags & SQLITE_ECEL_FACTOR)!=0 && sqlite3ExprIsConstant(pExpr) ){
      sqlite3ExprCodeAtInit(pParse, pExpr, target+i, 0);
    }else{
      int inReg = sqlite3ExprCodeTarget(pParse, pExpr, target+i);
      if( inReg!=target+i ){









        sqlite3VdbeAddOp2(pParse->pVdbe, copyOp, inReg, target+i);

      }
    }
  }
  return n;
}

/*
................................................................................
  if( NEVER(v==0) )     return;  /* Existence of VDBE checked by caller */
  if( NEVER(pExpr==0) ) return;  /* No way this can happen */
  op = pExpr->op;
  switch( op ){
    case TK_AND: {
      int d2 = sqlite3VdbeMakeLabel(v);
      testcase( jumpIfNull==0 );
      sqlite3ExprCachePush(pParse);
      sqlite3ExprIfFalse(pParse, pExpr->pLeft, d2,jumpIfNull^SQLITE_JUMPIFNULL);

      sqlite3ExprIfTrue(pParse, pExpr->pRight, dest, jumpIfNull);
      sqlite3VdbeResolveLabel(v, d2);
      sqlite3ExprCachePop(pParse, 1);
      break;
    }
    case TK_OR: {
      testcase( jumpIfNull==0 );
      sqlite3ExprIfTrue(pParse, pExpr->pLeft, dest, jumpIfNull);

      sqlite3ExprIfTrue(pParse, pExpr->pRight, dest, jumpIfNull);

      break;
    }
    case TK_NOT: {
      testcase( jumpIfNull==0 );
      sqlite3ExprIfFalse(pParse, pExpr->pLeft, dest, jumpIfNull);
      break;
    }
................................................................................
      sqlite3ExprCodeIN(pParse, pExpr, destIfFalse, destIfNull);
      sqlite3VdbeAddOp2(v, OP_Goto, 0, dest);
      sqlite3VdbeResolveLabel(v, destIfFalse);
      break;
    }
#endif
    default: {





      r1 = sqlite3ExprCodeTemp(pParse, pExpr, &regFree1);
      sqlite3VdbeAddOp3(v, OP_If, r1, dest, jumpIfNull!=0);
      testcase( regFree1==0 );
      testcase( jumpIfNull==0 );

      break;
    }
  }
  sqlite3ReleaseTempReg(pParse, regFree1);
  sqlite3ReleaseTempReg(pParse, regFree2);  
}

................................................................................
  assert( pExpr->op!=TK_GT || op==OP_Le );
  assert( pExpr->op!=TK_GE || op==OP_Lt );

  switch( pExpr->op ){
    case TK_AND: {
      testcase( jumpIfNull==0 );
      sqlite3ExprIfFalse(pParse, pExpr->pLeft, dest, jumpIfNull);

      sqlite3ExprIfFalse(pParse, pExpr->pRight, dest, jumpIfNull);

      break;
    }
    case TK_OR: {
      int d2 = sqlite3VdbeMakeLabel(v);
      testcase( jumpIfNull==0 );
      sqlite3ExprCachePush(pParse);
      sqlite3ExprIfTrue(pParse, pExpr->pLeft, d2, jumpIfNull^SQLITE_JUMPIFNULL);

      sqlite3ExprIfFalse(pParse, pExpr->pRight, dest, jumpIfNull);
      sqlite3VdbeResolveLabel(v, d2);
      sqlite3ExprCachePop(pParse, 1);
      break;
    }
    case TK_NOT: {
      testcase( jumpIfNull==0 );
................................................................................
        sqlite3ExprCodeIN(pParse, pExpr, dest, destIfNull);
        sqlite3VdbeResolveLabel(v, destIfNull);
      }
      break;
    }
#endif
    default: {





      r1 = sqlite3ExprCodeTemp(pParse, pExpr, &regFree1);
      sqlite3VdbeAddOp3(v, OP_IfNot, r1, dest, jumpIfNull!=0);
      testcase( regFree1==0 );
      testcase( jumpIfNull==0 );

      break;
    }
  }
  sqlite3ReleaseTempReg(pParse, regFree1);
  sqlite3ReleaseTempReg(pParse, regFree2);
}

................................................................................
*/
static int resolveAttachExpr(NameContext *pName, Expr *pExpr)
{
  int rc = SQLITE_OK;
  if( pExpr ){
    if( pExpr->op!=TK_ID ){
      rc = sqlite3ResolveExprNames(pName, pExpr);
      if( rc==SQLITE_OK && !sqlite3ExprIsConstant(pExpr) ){
        sqlite3ErrorMsg(pName->pParse, "invalid name: \"%s\"", pExpr->u.zToken);
        return SQLITE_ERROR;
      }
    }else{
      pExpr->op = TK_STRING;
    }
  }
  return rc;
}

................................................................................
  /* Begin by generating some termination code at the end of the
  ** vdbe program
  */
  v = sqlite3GetVdbe(pParse);
  assert( !pParse->isMultiWrite 
       || sqlite3VdbeAssertMayAbort(v, pParse->mayAbort));
  if( v ){

    sqlite3VdbeAddOp0(v, OP_Halt);

    /* The cookie mask contains one bit for each database file open.
    ** (Bit 0 is for main, bit 1 is for temp, and so forth.)  Bits are
    ** set for each database that is used.  Generate code to start a
    ** transaction on each used database and to verify the schema cookie
    ** on each used database.
................................................................................
  unsigned char *zIdent = (unsigned char*)zSignedIdent;
  int i, j, needQuote;
  i = *pIdx;

  for(j=0; zIdent[j]; j++){
    if( !sqlite3Isalnum(zIdent[j]) && zIdent[j]!='_' ) break;
  }
  needQuote = sqlite3Isdigit(zIdent[0]) || sqlite3KeywordCode(zIdent, j)!=TK_ID;
  if( !needQuote ){
    needQuote = zIdent[j];
  }


  if( needQuote ) z[i++] = '"';
  for(j=0; zIdent[j]; j++){
    z[i++] = zIdent[j];
    if( zIdent[j]=='"' ) z[i++] = '"';
  }
  if( needQuote ) z[i++] = '"';
................................................................................

  /* 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, 0, &iPartIdxLabel);
  sqlite3VdbeAddOp2(v, OP_SorterInsert, iSorter, regRecord);
  sqlite3VdbeResolveLabel(v, iPartIdxLabel);
  sqlite3VdbeAddOp2(v, OP_Next, iTab, addr1+1);
  sqlite3VdbeJumpHere(v, addr1);
  if( memRootPage<0 ) sqlite3VdbeAddOp2(v, OP_Clear, tnum, iDb);
  sqlite3VdbeAddOp4(v, OP_OpenWrite, iIdx, tnum, iDb, 
                    (char *)pKey, P4_KEYINFO);
................................................................................
  Table *pTab = pIdx->pTable;

  sqlite3StrAccumInit(&errMsg, 0, 0, 200);
  errMsg.db = pParse->db;
  for(j=0; j<pIdx->nKeyCol; j++){
    char *zCol = pTab->aCol[pIdx->aiColumn[j]].zName;
    if( j ) sqlite3StrAccumAppend(&errMsg, ", ", 2);
    sqlite3StrAccumAppend(&errMsg, pTab->zName, -1);
    sqlite3StrAccumAppend(&errMsg, ".", 1);
    sqlite3StrAccumAppend(&errMsg, zCol, -1);
  }
  zErr = sqlite3StrAccumFinish(&errMsg);
  sqlite3HaltConstraint(pParse, 
    (pIdx->autoIndex==2)?SQLITE_CONSTRAINT_PRIMARYKEY:SQLITE_CONSTRAINT_UNIQUE,
    onError, zErr, P4_DYNAMIC, P5_ConstraintUnique);
}

................................................................................
    }else{
      pKey = sqlite3KeyInfoAlloc(pParse->db, nCol, 0);
    }
    if( pKey ){
      assert( sqlite3KeyInfoIsWriteable(pKey) );
      for(i=0; i<nCol; i++){
        char *zColl = pIdx->azColl[i];
        if( NEVER(zColl==0) ) zColl = "BINARY";

        pKey->aColl[i] = sqlite3LocateCollSeq(pParse, zColl);
        pKey->aSortOrder[i] = pIdx->aSortOrder[i];
      }
      if( pParse->nErr ){
        sqlite3KeyInfoUnref(pKey);
      }else{
        pIdx->pKeyInfo = pKey;
      }
    }
  }
  return sqlite3KeyInfoRef(pIdx->pKeyInfo);
}







































































/************** End of build.c ***********************************************/
/************** Begin file callback.c ****************************************/
/*
** 2005 May 23 
**
** The author disclaims copyright to this source code.  In place of
** a legal notice, here is a blessing:
................................................................................
  FuncDef *p;         /* Iterator variable */
  FuncDef *pBest = 0; /* Best match found so far */
  int bestScore = 0;  /* Score of best match */
  int h;              /* Hash value */

  assert( nArg>=(-2) );
  assert( nArg>=(-1) || createFlag==0 );
  assert( enc==SQLITE_UTF8 || enc==SQLITE_UTF16LE || enc==SQLITE_UTF16BE );
  h = (sqlite3UpperToLower[(u8)zName[0]] + nName) % ArraySize(db->aFunc.a);

  /* First search for a match amongst the application-defined functions.
  */
  p = functionSearch(&db->aFunc, h, zName, nName);
  while( p ){
    int score = matchQuality(p, nArg, enc);
................................................................................
  Parse *pParse,     /* Parsing and code generating context */
  Table *pTab,       /* Table containing the row to be deleted */
  int iDataCur,      /* Cursor of table holding data. */
  int iIdxCur,       /* First index cursor */
  int *aRegIdx       /* Only delete if aRegIdx!=0 && aRegIdx[i]>0 */
){
  int i;             /* Index loop counter */
  int r1;            /* Register holding an index key */
  int iPartIdxLabel; /* Jump destination for skipping partial index entries */
  Index *pIdx;       /* Current index */

  Vdbe *v;           /* The prepared statement under construction */
  Index *pPk;        /* PRIMARY KEY index, or NULL for rowid tables */

  v = pParse->pVdbe;
  pPk = HasRowid(pTab) ? 0 : sqlite3PrimaryKeyIndex(pTab);
  for(i=0, pIdx=pTab->pIndex; pIdx; i++, pIdx=pIdx->pNext){
    assert( iIdxCur+i!=iDataCur || pPk==pIdx );
    if( aRegIdx!=0 && aRegIdx[i]==0 ) continue;
    if( pIdx==pPk ) continue;
    VdbeModuleComment((v, "GenRowIdxDel for %s", pIdx->zName));
    r1 = sqlite3GenerateIndexKey(pParse, pIdx, iDataCur, 0, 1, &iPartIdxLabel);

    sqlite3VdbeAddOp3(v, OP_IdxDelete, iIdxCur+i, r1,
                      pIdx->uniqNotNull ? pIdx->nKeyCol : pIdx->nColumn);
    sqlite3VdbeResolveLabel(v, iPartIdxLabel);

  }
}

/*
** Generate code that will assemble an index key and stores 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
................................................................................
**
** If *piPartIdxLabel is not NULL, fill it in with a label and jump
** to that label if pIdx is a partial index that should be skipped.
** A partial index should be skipped if its WHERE clause evaluates
** to false or null.  If pIdx is not a partial index, *piPartIdxLabel
** will be set to zero which is an empty label that is ignored by
** sqlite3VdbeResolveLabel().











*/
SQLITE_PRIVATE int sqlite3GenerateIndexKey(
  Parse *pParse,       /* Parsing context */
  Index *pIdx,         /* The index for which to generate a key */
  int iDataCur,        /* Cursor number from which to take column data */
  int regOut,          /* Put the new key into this register if not 0 */
  int prefixOnly,      /* Compute only a unique prefix of the key */
  int *piPartIdxLabel  /* OUT: Jump to this label to skip partial index */


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

  if( piPartIdxLabel ){
    if( pIdx->pPartIdxWhere ){
      *piPartIdxLabel = sqlite3VdbeMakeLabel(v);
      pParse->iPartIdxTab = iDataCur;
      sqlite3ExprIfFalse(pParse, pIdx->pPartIdxWhere, *piPartIdxLabel, 
                         SQLITE_JUMPIFNULL);
    }else{
      *piPartIdxLabel = 0;
    }
  }
  nCol = (prefixOnly && pIdx->uniqNotNull) ? pIdx->nKeyCol : pIdx->nColumn;
  regBase = sqlite3GetTempRange(pParse, nCol);
  pPk = HasRowid(pTab) ? 0 : sqlite3PrimaryKeyIndex(pTab);
  for(j=0; j<nCol; j++){
    i16 idx = pIdx->aiColumn[j];
    if( pPk ) idx = sqlite3ColumnOfIndex(pPk, idx);
    if( idx<0 || idx==pTab->iPKey ){
      sqlite3VdbeAddOp2(v, OP_Rowid, iDataCur, regBase+j);
    }else{
      sqlite3VdbeAddOp3(v, OP_Column, iDataCur, idx, regBase+j);
      sqlite3ColumnDefault(v, pTab, pIdx->aiColumn[j], -1);



    }
  }
  if( regOut ){
    const char *zAff;
    if( pTab->pSelect
     || OptimizationDisabled(pParse->db, SQLITE_IdxRealAsInt)
    ){
      zAff = 0;
    }else{
      zAff = sqlite3IndexAffinityStr(v, pIdx);
    }
    sqlite3VdbeAddOp3(v, OP_MakeRecord, regBase, nCol, regOut);
    sqlite3VdbeChangeP4(v, -1, zAff, P4_TRANSIENT);
  }
  sqlite3ReleaseTempRange(pParse, regBase, nCol);
  return regBase;
}

/************** End of delete.c **********************************************/
/************** Begin file func.c ********************************************/
................................................................................
      nHaystack--;
      zHaystack++;
    }while( isText && (zHaystack[0]&0xc0)==0x80 );
  }
  if( nNeedle>nHaystack ) N = 0;
  sqlite3_result_int(context, N);
}



























/*
** Implementation of the substr() function.
**
** 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( argc==2 ){
        zSep = (char*)sqlite3_value_text(argv[1]);
        nSep = sqlite3_value_bytes(argv[1]);
      }else{
        zSep = ",";
        nSep = 1;
      }
      sqlite3StrAccumAppend(pAccum, zSep, nSep);
    }
    zVal = (char*)sqlite3_value_text(argv[0]);
    nVal = sqlite3_value_bytes(argv[0]);
    sqlite3StrAccumAppend(pAccum, zVal, nVal);
  }
}
static void groupConcatFinalize(sqlite3_context *context){
  StrAccum *pAccum;
  pAccum = sqlite3_aggregate_context(context, 0);
  if( pAccum ){
    if( pAccum->accError==STRACCUM_TOOBIG ){
................................................................................
    FUNCTION(max,                0, 1, 1, 0                ),
    AGGREGATE(max,               1, 1, 1, minmaxStep,      minMaxFinalize ),
    FUNCTION2(typeof,            1, 0, 0, typeofFunc,  SQLITE_FUNC_TYPEOF),
    FUNCTION2(length,            1, 0, 0, lengthFunc,  SQLITE_FUNC_LENGTH),
    FUNCTION(instr,              2, 0, 0, instrFunc        ),
    FUNCTION(substr,             2, 0, 0, substrFunc       ),
    FUNCTION(substr,             3, 0, 0, substrFunc       ),

    FUNCTION(unicode,            1, 0, 0, unicodeFunc      ),
    FUNCTION(char,              -1, 0, 0, charFunc         ),
    FUNCTION(abs,                1, 0, 0, absFunc          ),
#ifndef SQLITE_OMIT_FLOATING_POINT
    FUNCTION(round,              1, 0, 0, roundFunc        ),
    FUNCTION(round,              2, 0, 0, roundFunc        ),
#endif
................................................................................
**           transfer values form intermediate table into <table>
**         end loop
**      D: cleanup
*/
SQLITE_PRIVATE void sqlite3Insert(
  Parse *pParse,        /* Parser context */
  SrcList *pTabList,    /* Name of table into which we are inserting */
  ExprList *pList,      /* List of values to be inserted */
  Select *pSelect,      /* A SELECT statement to use as the data source */
  IdList *pColumn,      /* Column names corresponding to IDLIST. */
  int onError           /* How to handle constraint errors */
){
  sqlite3 *db;          /* The main database structure */
  Table *pTab;          /* The table to insert into.  aka TABLE */
  char *zTab;           /* Name of the table into which we are inserting */
................................................................................
  int addrCont = 0;     /* Top of insert loop. Label "C" in templates 3 and 4 */
  int addrSelect = 0;   /* Address of coroutine that implements the SELECT */
  SelectDest dest;      /* Destination for SELECT on rhs of INSERT */
  int iDb;              /* Index of database holding TABLE */
  Db *pDb;              /* The database containing table being inserted into */
  int appendFlag = 0;   /* True if the insert is likely to be an append */
  int withoutRowid;     /* 0 for normal table.  1 for WITHOUT ROWID table */


  /* Register allocations */
  int regFromSelect = 0;/* Base register for data coming from SELECT */
  int regAutoinc = 0;   /* Register holding the AUTOINCREMENT counter */
  int regRowCount = 0;  /* Memory cell used for the row counter */
  int regIns;           /* Block of regs holding rowid+data being inserted */
  int regRowid;         /* registers holding insert rowid */
................................................................................
#endif

  db = pParse->db;
  memset(&dest, 0, sizeof(dest));
  if( pParse->nErr || db->mallocFailed ){
    goto insert_cleanup;
  }












  /* Locate the table into which we will be inserting new information.
  */
  assert( pTabList->nSrc==1 );
  zTab = pTabList->a[0].zName;
  if( NEVER(zTab==0) ) goto insert_cleanup;
  pTab = sqlite3SrcListLookup(pParse, pTabList);
................................................................................
  **       INSERT INTO <table1> SELECT * FROM <table2>;
  **
  ** Then special optimizations can be applied that make the transfer
  ** very fast and which reduce fragmentation of indices.
  **
  ** This is the 2nd template.
  */

  if( pColumn==0 && xferOptimization(pParse, pTab, pSelect, onError, iDb) ){
    assert( !pTrigger );
    assert( pList==0 );
    goto insert_end;
  }
#endif /* SQLITE_OMIT_XFER_OPT */

  /* If this is an AUTOINCREMENT table, look up the sequence number in the
................................................................................
  int onError;         /* Conflict resolution strategy */
  int j1;              /* Addresss of jump instruction */
  int seenReplace = 0; /* True if REPLACE is used to resolve INT PK conflict */
  int nPkField;        /* Number of fields in PRIMARY KEY. 1 for ROWID tables */
  int ipkTop = 0;      /* Top of the rowid change constraint check */
  int ipkBottom = 0;   /* Bottom of the rowid change constraint check */
  u8 isUpdate;         /* True if this is an UPDATE operation */


  isUpdate = regOldData!=0;
  db = pParse->db;
  v = sqlite3GetVdbe(pParse);
  assert( v!=0 );
  assert( pTab->pSelect==0 );  /* This table is not a VIEW */
  nCol = pTab->nCol;
................................................................................
    ** the insert or update.  Store that record in the aRegIdx[ix] register
    */
    regIdx = sqlite3GetTempRange(pParse, pIdx->nColumn);
    for(i=0; i<pIdx->nColumn; i++){
      int iField = pIdx->aiColumn[i];
      int x;
      if( iField<0 || iField==pTab->iPKey ){

        x = regNewData;

      }else{
        x = iField + regNewData + 1;
      }
      sqlite3VdbeAddOp2(v, OP_SCopy, x, regIdx+i);
      VdbeComment((v, "%s", iField<0 ? "rowid" : pTab->aCol[iField].zName));
    }
    sqlite3VdbeAddOp3(v, OP_MakeRecord, regIdx, pIdx->nColumn, aRegIdx[ix]);
................................................................................
    
    /* Check to see if the new index entry will be unique */
    sqlite3VdbeAddOp4Int(v, OP_NoConflict, iThisCur, addrUniqueOk,
                         regIdx, pIdx->nKeyCol);

    /* Generate code to handle collisions */
    regR = (pIdx==pPk) ? regIdx : sqlite3GetTempRange(pParse, nPkField);

    if( HasRowid(pTab) ){
      sqlite3VdbeAddOp2(v, OP_IdxRowid, iThisCur, regR);
      /* Conflict only if the rowid of the existing index entry
      ** is different from old-rowid */
      if( isUpdate ){
        sqlite3VdbeAddOp3(v, OP_Eq, regR, addrUniqueOk, regOldData);
      }
    }else{
      int x;
      /* Extract the PRIMARY KEY from the end of the index entry and
      ** store it in registers regR..regR+nPk-1 */
      if( (isUpdate || onError==OE_Replace) && pIdx!=pPk ){
        for(i=0; i<pPk->nKeyCol; i++){
          x = sqlite3ColumnOfIndex(pIdx, pPk->aiColumn[i]);
          sqlite3VdbeAddOp3(v, OP_Column, iThisCur, x, regR+i);
          VdbeComment((v, "%s.%s", pTab->zName,
                       pTab->aCol[pPk->aiColumn[i]].zName));
        }
      }
      if( isUpdate ){
        /* If currently processing the PRIMARY KEY of a WITHOUT ROWID 
        ** table, only conflict if the new PRIMARY KEY values are actually
        ** different from the old.
        **
        ** For a UNIQUE index, only conflict if the PRIMARY KEY values
        ** of the matched index row are different from the original PRIMARY
        ** KEY values of this row before the update.  */
        int addrJump = sqlite3VdbeCurrentAddr(v)+pPk->nKeyCol;
        int op = OP_Ne;
        int regCmp = (pIdx->autoIndex==2 ? regIdx : regR);

        for(i=0; i<pPk->nKeyCol; i++){
          char *p4 = (char*)sqlite3LocateCollSeq(pParse, pPk->azColl[i]);
          x = pPk->aiColumn[i];
          if( i==(pPk->nKeyCol-1) ){
            addrJump = addrUniqueOk;
            op = OP_Eq;
          }
          sqlite3VdbeAddOp4(v, op, 
              regOldData+1+x, addrJump, regCmp+i, p4, P4_COLLSEQ
          );

        }
      }
    }

    /* Generate code that executes if the new index entry is not unique */
    assert( onError==OE_Rollback || onError==OE_Abort || onError==OE_Fail
        || onError==OE_Ignore || onError==OE_Replace );
................................................................................
      sqlite3VdbeJumpHere(v, addr);

      /* Make sure all the indices are constructed correctly.
      */
      for(x=sqliteHashFirst(pTbls); x && !isQuick; x=sqliteHashNext(x)){
        Table *pTab = sqliteHashData(x);
        Index *pIdx, *pPk;

        int loopTop;
        int iDataCur, iIdxCur;


        if( pTab->pIndex==0 ) continue;
        pPk = HasRowid(pTab) ? 0 : sqlite3PrimaryKeyIndex(pTab);
        addr = sqlite3VdbeAddOp1(v, OP_IfPos, 1);  /* Stop if out of errors */
        sqlite3VdbeAddOp2(v, OP_Halt, 0, 0);
        sqlite3VdbeJumpHere(v, addr);
        sqlite3ExprCacheClear(pParse);
................................................................................
          sqlite3VdbeAddOp2(v, OP_Integer, 0, 8+j); /* index entries counter */
        }
        pParse->nMem = MAX(pParse->nMem, 8+j);
        sqlite3VdbeAddOp2(v, OP_Rewind, iDataCur, 0);
        loopTop = sqlite3VdbeAddOp2(v, OP_AddImm, 7, 1);
        for(j=0, pIdx=pTab->pIndex; pIdx; pIdx=pIdx->pNext, j++){
          int jmp2, jmp3, jmp4;
          int r1;
          if( pPk==pIdx ) continue;
          r1 = sqlite3GenerateIndexKey(pParse, pIdx, iDataCur, 0, 0, &jmp3);


          sqlite3VdbeAddOp2(v, OP_AddImm, 8+j, 1);  /* increment entry count */
          jmp2 = sqlite3VdbeAddOp4Int(v, OP_Found, iIdxCur+j, 0, r1,
                                      pIdx->nColumn);
          sqlite3VdbeAddOp2(v, OP_AddImm, 1, -1); /* Decrement error limit */
          sqlite3VdbeAddOp4(v, OP_String8, 0, 3, 0, "row ", P4_STATIC);
          sqlite3VdbeAddOp3(v, OP_Concat, 7, 3, 3);
          sqlite3VdbeAddOp4(v, OP_String8, 0, 4, 0, " missing from index ",
................................................................................
  return i;
}

/*
** Free all memory allocations in the pParse object
*/
SQLITE_PRIVATE void sqlite3ParserReset(Parse *pParse){



  if( pParse ) sqlite3ExprListDelete(pParse->db, pParse->pConstExpr);

}

/*
** Compile the UTF-8 encoded SQL statement zSql into a statement handle.
*/
static int sqlite3Prepare(
  sqlite3 *db,              /* Database handle. */
................................................................................
  sqlite3ExprDelete(db, p->pWhere);
  sqlite3ExprListDelete(db, p->pGroupBy);
  sqlite3ExprDelete(db, p->pHaving);
  sqlite3ExprListDelete(db, p->pOrderBy);
  sqlite3SelectDelete(db, p->pPrior);
  sqlite3ExprDelete(db, p->pLimit);
  sqlite3ExprDelete(db, p->pOffset);

}

/*
** Initialize a SelectDest structure.
*/
SQLITE_PRIVATE void sqlite3SelectDestInit(SelectDest *pDest, int eDest, int iParm){
  pDest->eDest = (u8)eDest;
................................................................................
    for(i=0; i<nColumn; i++){
      sqlite3VdbeAddOp3(v, OP_Column, srcTab, i, regResult+i);
    }
  }else if( eDest!=SRT_Exists ){
    /* If the destination is an EXISTS(...) expression, the actual
    ** values returned by the SELECT are not required.
    */
    sqlite3ExprCacheClear(pParse);
    sqlite3ExprCodeExprList(pParse, pEList, regResult,
                            (eDest==SRT_Output)?SQLITE_ECEL_DUP:0);
  }
  nColumn = nResultCol;

  /* If the DISTINCT keyword was present on the SELECT statement
  ** and this row has been seen before, then do not make this row
................................................................................
      sqlite3VdbeAddOp3(v, OP_IdxDelete, iParm, regResult, nColumn);
      break;
    }
#endif

    /* Store the result as data using a unique key.
    */

    case SRT_Table:
    case SRT_EphemTab: {
      int r1 = sqlite3GetTempReg(pParse);
      testcase( eDest==SRT_Table );
      testcase( eDest==SRT_EphemTab );
      sqlite3VdbeAddOp3(v, OP_MakeRecord, regResult, nColumn, r1);













      if( pOrderBy ){
        pushOntoSorter(pParse, pOrderBy, p, r1);
      }else{
        int r2 = sqlite3GetTempReg(pParse);
        sqlite3VdbeAddOp2(v, OP_NewRowid, iParm, r2);
        sqlite3VdbeAddOp3(v, OP_Insert, iParm, r1, r2);
        sqlite3VdbeChangeP5(v, OPFLAG_APPEND);
................................................................................
          NameContext sNC;
          Expr *p = pS->pEList->a[iCol].pExpr;
          sNC.pSrcList = pS->pSrc;
          sNC.pNext = pNC;
          sNC.pParse = pNC->pParse;
          zType = columnType(&sNC, p,&zOrigDb,&zOrigTab,&zOrigCol, &estWidth); 
        }
      }else if( ALWAYS(pTab->pSchema) ){
        /* A real table */
        assert( !pS );
        if( iCol<0 ) iCol = pTab->iPKey;
        assert( iCol==-1 || (iCol>=0 && iCol<pTab->nCol) );
#ifdef SQLITE_ENABLE_COLUMN_METADATA
        if( iCol<0 ){
          zType = "INTEGER";
................................................................................
        char *zName = 0;
        zName = sqlite3MPrintf(db, "%s.%s", pTab->zName, zCol);
        sqlite3VdbeSetColName(v, i, COLNAME_NAME, zName, SQLITE_DYNAMIC);
      }else{
        sqlite3VdbeSetColName(v, i, COLNAME_NAME, zCol, SQLITE_TRANSIENT);
      }
    }else{
      sqlite3VdbeSetColName(v, i, COLNAME_NAME, 
          sqlite3DbStrDup(db, pEList->a[i].zSpan), SQLITE_DYNAMIC);

    }
  }
  generateColumnTypes(pParse, pTabList, pEList);
}

/*
** Given a an expression list (which is really the list of expressions
................................................................................
/*
** Get a VDBE for the given parser context.  Create a new one if necessary.
** If an error occurs, return NULL and leave a message in pParse.
*/
SQLITE_PRIVATE Vdbe *sqlite3GetVdbe(Parse *pParse){
  Vdbe *v = pParse->pVdbe;
  if( v==0 ){
    v = pParse->pVdbe = sqlite3VdbeCreate(pParse->db);
#ifndef SQLITE_OMIT_TRACE
    if( v ){
      sqlite3VdbeAddOp0(v, OP_Trace);
    }
#endif
  }
  return v;
................................................................................
  int iSub2;            /* EQP id of right-hand query */
#endif

  /* Make sure there is no ORDER BY or LIMIT clause on prior SELECTs.  Only
  ** the last (right-most) SELECT in the series may have an ORDER BY or LIMIT.
  */
  assert( p && p->pPrior );  /* Calling function guarantees this much */

  db = pParse->db;
  pPrior = p->pPrior;
  assert( pPrior->pRightmost!=pPrior );
  assert( pPrior->pRightmost==p->pRightmost );
  dest = *pDest;
  if( pPrior->pOrderBy ){
    sqlite3ErrorMsg(pParse,"ORDER BY clause should come after %s not before",
................................................................................
    }else{
      sqlite3ErrorMsg(pParse, "SELECTs to the left and right of %s"
        " do not have the same number of result columns", selectOpName(p->op));
    }
    rc = 1;
    goto multi_select_end;
  }

















































































  /* Compound SELECTs that have an ORDER BY clause are handled separately.
  */
  if( p->pOrderBy ){
    return multiSelectOrderBy(pParse, p, pDest);
  }


  /* Generate code for the left and right SELECT statements.
  */
  switch( p->op ){
    case TK_ALL: {
      int addr = 0;
      int nLimit;
................................................................................
**        an ORDER BY clause.  Ticket #3773.  We could relax this constraint
**        somewhat by saying that the terms of the ORDER BY clause must
**        appear as unmodified result columns in the outer query.  But we
**        have other optimizations in mind to deal with that case.
**
**  (21)  The subquery does not use LIMIT or the outer query is not
**        DISTINCT.  (See ticket [752e1646fc]).








**
** In this routine, the "p" parameter is a pointer to the outer query.
** The subquery is p->pSrc->a[iFrom].  isAgg is true if the outer query
** uses aggregates and subqueryIsAgg is true if the subquery uses aggregates.
**
** If flattening is not attempted, this routine is a no-op and returns 0.
** If flattening is attempted this routine returns 1.
................................................................................
     return 0;                                           /* Restriction (11) */
  }
  if( isAgg && pSub->pOrderBy ) return 0;                /* Restriction (16) */
  if( pSub->pLimit && p->pWhere ) return 0;              /* Restriction (19) */
  if( pSub->pLimit && (p->selFlags & SF_Distinct)!=0 ){
     return 0;         /* Restriction (21) */
  }



  /* OBSOLETE COMMENT 1:
  ** Restriction 3:  If the subquery is a join, make sure the subquery is 
  ** not used as the right operand of an outer join.  Examples of why this
  ** is not allowed:
  **
  **         t1 LEFT OUTER JOIN (t2 JOIN t3)
................................................................................
  pNew->pOrderBy = 0;
  p->pPrior = 0;
  pNew->pLimit = 0;
  pNew->pOffset = 0;
  return WRC_Continue;
}































































































































































































/*
** This routine is a Walker callback for "expanding" a SELECT statement.
** "Expanding" means to do the following:
**
**    (1)  Make sure VDBE cursor numbers have been assigned to every
**         element of the FROM clause.
**
................................................................................
    return WRC_Abort;
  }
  if( NEVER(p->pSrc==0) || (selFlags & SF_Expanded)!=0 ){
    return WRC_Prune;
  }
  pTabList = p->pSrc;
  pEList = p->pEList;


  /* Make sure cursor numbers have been assigned to all entries in
  ** the FROM clause of the SELECT statement.
  */
  sqlite3SrcListAssignCursors(pParse, pTabList);

  /* Look up every table named in the FROM clause of the select.  If
  ** an entry of the FROM clause is a subquery instead of a table or view,
  ** then create a transient table structure to describe the subquery.
  */
  for(i=0, pFrom=pTabList->a; i<pTabList->nSrc; i++, pFrom++){
    Table *pTab;


    if( pFrom->pTab!=0 ){
      /* This statement has already been prepared.  There is no need
      ** to go further. */
      assert( i==0 );



      return WRC_Prune;
    }




    if( pFrom->zName==0 ){
#ifndef SQLITE_OMIT_SUBQUERY
      Select *pSel = pFrom->pSelect;
      /* A sub-query in the FROM clause of a SELECT */
      assert( pSel!=0 );
      assert( pFrom->pTab==0 );
      sqlite3WalkSelect(pWalker, pSel);
................................................................................
  w.xExprCallback = exprWalkNoop;
  w.pParse = pParse;
  if( pParse->hasCompound ){
    w.xSelectCallback = convertCompoundSelectToSubquery;
    sqlite3WalkSelect(&w, pSelect);
  }
  w.xSelectCallback = selectExpander;

  sqlite3WalkSelect(&w, pSelect);
}


#ifndef SQLITE_OMIT_SUBQUERY
/*
** This is a Walker.xSelectCallback callback for the sqlite3SelectTypeInfo()
................................................................................
** of that subquery.
**
** The Table structure that represents the result set was constructed
** by selectExpander() but the type and collation information was omitted
** at that point because identifiers had not yet been resolved.  This
** routine is called after identifier resolution.
*/
static int selectAddSubqueryTypeInfo(Walker *pWalker, Select *p){
  Parse *pParse;
  int i;
  SrcList *pTabList;
  struct SrcList_item *pFrom;

  assert( p->selFlags & SF_Resolved );
  if( (p->selFlags & SF_HasTypeInfo)==0 ){
................................................................................
    pParse = pWalker->pParse;
    pTabList = p->pSrc;
    for(i=0, pFrom=pTabList->a; i<pTabList->nSrc; i++, pFrom++){
      Table *pTab = pFrom->pTab;
      if( ALWAYS(pTab!=0) && (pTab->tabFlags & TF_Ephemeral)!=0 ){
        /* A sub-query in the FROM clause of a SELECT */
        Select *pSel = pFrom->pSelect;
        assert( pSel );
        while( pSel->pPrior ) pSel = pSel->pPrior;
        selectAddColumnTypeAndCollation(pParse, pTab, pSel);

      }
    }
  }
  return WRC_Continue;
}
#endif


/*
** This routine adds datatype and collating sequence information to
** the Table structures of all FROM-clause subqueries in a
................................................................................
**
** Use this routine after name resolution.
*/
static void sqlite3SelectAddTypeInfo(Parse *pParse, Select *pSelect){
#ifndef SQLITE_OMIT_SUBQUERY
  Walker w;
  memset(&w, 0, sizeof(w));
  w.xSelectCallback = selectAddSubqueryTypeInfo;
  w.xExprCallback = exprWalkNoop;
  w.pParse = pParse;
  w.bSelectDepthFirst = 1;
  sqlite3WalkSelect(&w, pSelect);
#endif
}


/*
** This routine sets up a SELECT statement for processing.  The
................................................................................
** routine generates code that stores NULLs in all of those memory
** cells.
*/
static void resetAccumulator(Parse *pParse, AggInfo *pAggInfo){
  Vdbe *v = pParse->pVdbe;
  int i;
  struct AggInfo_func *pFunc;
  if( pAggInfo->nFunc+pAggInfo->nColumn==0 ){
    return;







  }
  for(i=0; i<pAggInfo->nColumn; i++){
    sqlite3VdbeAddOp2(v, OP_Null, 0, pAggInfo->aCol[i].iMem);


  }


  for(pFunc=pAggInfo->aFunc, i=0; i<pAggInfo->nFunc; i++, pFunc++){
    sqlite3VdbeAddOp2(v, OP_Null, 0, pFunc->iMem);
    if( pFunc->iDistinct>=0 ){
      Expr *pE = pFunc->pExpr;
      assert( !ExprHasProperty(pE, EP_xIsSelect) );
      if( pE->x.pList==0 || pE->x.pList->nExpr!=1 ){
        sqlite3ErrorMsg(pParse, "DISTINCT aggregates must have exactly one "
           "argument");
        pFunc->iDistinct = -1;
................................................................................
  int i;
  int regHit = 0;
  int addrHitTest = 0;
  struct AggInfo_func *pF;
  struct AggInfo_col *pC;

  pAggInfo->directMode = 1;
  sqlite3ExprCacheClear(pParse);
  for(i=0, pF=pAggInfo->aFunc; i<pAggInfo->nFunc; i++, pF++){
    int nArg;
    int addrNext = 0;
    int regAgg;
    ExprList *pList = pF->pExpr->x.pList;
    assert( !ExprHasProperty(pF->pExpr, EP_xIsSelect) );
    if( pList ){
................................................................................
    ** sAggInfo for all TK_AGG_FUNCTION nodes in expressions of the
    ** SELECT statement.
    */
    memset(&sNC, 0, sizeof(sNC));
    sNC.pParse = pParse;
    sNC.pSrcList = pTabList;
    sNC.pAggInfo = &sAggInfo;

    sAggInfo.nSortingColumn = pGroupBy ? pGroupBy->nExpr+1 : 0;
    sAggInfo.pGroupBy = pGroupBy;
    sqlite3ExprAnalyzeAggList(&sNC, pEList);
    sqlite3ExprAnalyzeAggList(&sNC, pOrderBy);
    if( pHaving ){
      sqlite3ExprAnalyzeAggregates(&sNC, pHaving);
    }
................................................................................
    sAggInfo.nAccumulator = sAggInfo.nColumn;
    for(i=0; i<sAggInfo.nFunc; i++){
      assert( !ExprHasProperty(sAggInfo.aFunc[i].pExpr, EP_xIsSelect) );
      sNC.ncFlags |= NC_InAggFunc;
      sqlite3ExprAnalyzeAggList(&sNC, sAggInfo.aFunc[i].pExpr->x.pList);
      sNC.ncFlags &= ~NC_InAggFunc;
    }

    if( db->mallocFailed ) goto select_end;

    /* Processing for aggregates with GROUP BY is very different and
    ** much more complex than aggregates without a GROUP BY.
    */
    if( pGroupBy ){
      KeyInfo *pKeyInfo;  /* Keying information for the group by clause */
................................................................................
** The parser calls this routine when it sees an INSERT inside the
** body of a trigger.
*/
SQLITE_PRIVATE TriggerStep *sqlite3TriggerInsertStep(
  sqlite3 *db,        /* The database connection */
  Token *pTableName,  /* Name of the table into which we insert */
  IdList *pColumn,    /* List of columns in pTableName to insert into */
  ExprList *pEList,   /* The VALUE clause: a list of values to be inserted */
  Select *pSelect,    /* A SELECT statement that supplies values */
  u8 orconf           /* The conflict algorithm (OE_Abort, OE_Replace, etc.) */
){
  TriggerStep *pTriggerStep;

  assert(pEList == 0 || pSelect == 0);
  assert(pEList != 0 || pSelect != 0 || db->mallocFailed);

  pTriggerStep = triggerStepAllocate(db, TK_INSERT, pTableName);
  if( pTriggerStep ){
    pTriggerStep->pSelect = sqlite3SelectDup(db, pSelect, EXPRDUP_REDUCE);
    pTriggerStep->pIdList = pColumn;
    pTriggerStep->pExprList = sqlite3ExprListDup(db, pEList, EXPRDUP_REDUCE);
    pTriggerStep->orconf = orconf;
  }else{
    sqlite3IdListDelete(db, pColumn);
  }
  sqlite3ExprListDelete(db, pEList);
  sqlite3SelectDelete(db, pSelect);

  return pTriggerStep;
}

/*
** Construct a trigger step that implements an UPDATE statement and return
................................................................................
          pParse->eOrconf
        );
        break;
      }
      case TK_INSERT: {
        sqlite3Insert(pParse, 
          targetSrcList(pParse, pStep),
          sqlite3ExprListDup(db, pStep->pExprList, 0), 
          sqlite3SelectDup(db, pStep->pSelect, 0), 
          sqlite3IdListDup(db, pStep->pIdList), 
          pParse->eOrconf
        );
        break;
      }
      case TK_DELETE: {
................................................................................
    assert( i<pTab->nCol );
    sqlite3ValueFromExpr(sqlite3VdbeDb(v), pCol->pDflt, enc, 
                         pCol->affinity, &pValue);
    if( pValue ){
      sqlite3VdbeChangeP4(v, -1, (const char *)pValue, P4_MEM);
    }
#ifndef SQLITE_OMIT_FLOATING_POINT
    if( iReg>=0 && pTab->aCol[i].affinity==SQLITE_AFF_REAL ){
      sqlite3VdbeAddOp1(v, OP_RealAffinity, iReg);
    }
#endif
  }
}

/*
................................................................................
  ** the database after the BEFORE triggers are fired anyway (as the trigger 
  ** may have modified them). So not loading those that are not going to
  ** be used eliminates some redundant opcodes.
  */
  newmask = sqlite3TriggerColmask(
      pParse, pTrigger, pChanges, 1, TRIGGER_BEFORE, pTab, onError
  );
  sqlite3VdbeAddOp3(v, OP_Null, 0, regNew, regNew+pTab->nCol-1);
  for(i=0; i<pTab->nCol; i++){
    if( i==pTab->iPKey ){
      /*sqlite3VdbeAddOp2(v, OP_Null, 0, regNew+i);*/
    }else{
      j = aXRef[i];
      if( j>=0 ){
        sqlite3ExprCode(pParse, pChanges->a[j].pExpr, regNew+i);
      }else if( 0==(tmask&TRIGGER_BEFORE) || i>31 || (newmask&(1<<i)) ){
        /* This branch loads the value of a column that will not be changed 
        ** into a register. This is done if there are no BEFORE triggers, or
        ** if there are one or more BEFORE triggers that use this value via
        ** a new.* reference in a trigger program.
        */
        testcase( i==31 );
        testcase( i==32 );
        sqlite3ExprCodeGetColumnOfTable(v, pTab, iDataCur, i, regNew+i);


      }
    }
  }

  /* Fire any BEFORE UPDATE triggers. This happens before constraints are
  ** verified. One could argue that this is wrong.
  */
................................................................................
  ){
    /* IMP: R-02065-49465 The left-hand side of the LIKE or GLOB operator must
    ** be the name of an indexed column with TEXT affinity. */
    return 0;
  }
  assert( pLeft->iColumn!=(-1) ); /* Because IPK never has AFF_TEXT */

  pRight = pList->a[0].pExpr;
  op = pRight->op;
  if( op==TK_VARIABLE ){
    Vdbe *pReprepare = pParse->pReprepare;
    int iCol = pRight->iColumn;
    pVal = sqlite3VdbeGetBoundValue(pReprepare, iCol, SQLITE_AFF_NONE);
    if( pVal && sqlite3_value_type(pVal)==SQLITE_TEXT ){
      z = (char *)sqlite3_value_text(pVal);
................................................................................
  sqlite3VdbeAddOp2(v, OP_OpenAutoindex, pLevel->iIdxCur, nKeyCol+1);
  sqlite3VdbeSetP4KeyInfo(pParse, pIdx);
  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, 0, 0);
  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);
  
................................................................................
static void explainAppendTerm(
  StrAccum *pStr,             /* The text expression being built */
  int iTerm,                  /* Index of this term.  First is zero */
  const char *zColumn,        /* Name of the column */
  const char *zOp             /* Name of the operator */
){
  if( iTerm ) sqlite3StrAccumAppend(pStr, " AND ", 5);
  sqlite3StrAccumAppend(pStr, zColumn, -1);
  sqlite3StrAccumAppend(pStr, zOp, 1);
  sqlite3StrAccumAppend(pStr, "?", 1);
}

/*
** Argument pLevel describes a strategy for scanning table pTab. This 
** function returns a pointer to a string buffer containing a description
................................................................................
  for(i=0; i<nEq; i++){
    char *z = (i==pIndex->nKeyCol ) ? "rowid" : aCol[aiColumn[i]].zName;
    if( i>=nSkip ){
      explainAppendTerm(&txt, i, z, "=");
    }else{
      if( i ) sqlite3StrAccumAppend(&txt, " AND ", 5);
      sqlite3StrAccumAppend(&txt, "ANY(", 4);
      sqlite3StrAccumAppend(&txt, z, -1);
      sqlite3StrAccumAppend(&txt, ")", 1);
    }
  }

  j = i;
  if( pLoop->wsFlags&WHERE_BTM_LIMIT ){
    char *z = (j==pIndex->nKeyCol ) ? "rowid" : aCol[aiColumn[j]].zName;
................................................................................
  if( !pBuilder->pOrSet
   && (pWInfo->pParse->db->flags & SQLITE_AutoIndex)!=0
   && pSrc->pIndex==0
   && !pSrc->viaCoroutine
   && !pSrc->notIndexed
   && HasRowid(pTab)
   && !pSrc->isCorrelated

  ){
    /* Generate auto-index WhereLoops */
    WhereTerm *pTerm;
    WhereTerm *pWCEnd = pWC->a + pWC->nTerm;
    for(pTerm=pWC->a; rc==SQLITE_OK && pTerm<pWCEnd; pTerm++){
      if( pTerm->prereqRight & pNew->maskSelf ) continue;
      if( termCanDriveIndex(pTerm, pSrc, 0) ){
................................................................................
  whereClauseInit(&pWInfo->sWC, pWInfo);
  whereSplit(&pWInfo->sWC, pWhere, TK_AND);
  sqlite3CodeVerifySchema(pParse, -1); /* Insert the cookie verifier Goto */
    
  /* 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;


  }

  /* Special case: No FROM clause
  */
  if( nTabList==0 ){
    if( pOrderBy ) pWInfo->bOBSat = 1;
    if( wctrlFlags & WHERE_WANT_DISTINCT ){
................................................................................
struct TrigEvent { int a; IdList * b; };

/*
** An instance of this structure holds the ATTACH key and the key type.
*/
struct AttachKey { int type;  Token key; };

/*
** One or more VALUES claues
*/
struct ValueList {
  ExprList *pList;
  Select *pSelect;
};


  /* This is a utility routine used to set the ExprSpan.zStart and
  ** ExprSpan.zEnd values of pOut so that the span covers the complete
  ** range of text beginning with pStart and going to the end of pEnd.
  */
  static void spanSet(ExprSpan *pOut, Token *pStart, Token *pEnd){
    pOut->zStart = pStart->z;
................................................................................
**    sqlite3ParserARG_FETCH     Code to extract %extra_argument from yypParser
**    YYNSTATE           the combined number of states.
**    YYNRULE            the number of rules in the grammar
**    YYERRORSYMBOL      is the code number of the error symbol.  If not
**                       defined, then do no error processing.
*/
#define YYCODETYPE unsigned char
#define YYNOCODE 253
#define YYACTIONTYPE unsigned short int
#define YYWILDCARD 68
#define sqlite3ParserTOKENTYPE Token
typedef union {
  int yyinit;
  sqlite3ParserTOKENTYPE yy0;
  int yy4;
  struct TrigEvent yy90;
  ExprSpan yy118;
  u16 yy177;
  TriggerStep* yy203;

  u8 yy210;
  struct {int value; int mask;} yy215;
  SrcList* yy259;
  struct ValueList yy260;
  struct LimitVal yy292;
  Expr* yy314;
  ExprList* yy322;
  struct LikeOp yy342;
  IdList* yy384;
  Select* yy387;
} YYMINORTYPE;
#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 631
#define YYNRULE 329
#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
** YYMINORTYPE objects to zero. */
................................................................................
**                     yy_action.  Used to detect hash collisions.
**  yy_shift_ofst[]    For each state, the offset into yy_action for
**                     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 (1582)
static const YYACTIONTYPE yy_action[] = {
 /*     0 */   312,  961,  185,  420,    2,  171,  516,  515,  597,   56,
 /*    10 */    56,   56,   56,   49,   54,   54,   54,   54,   53,   53,
 /*    20 */    52,   52,   52,   51,  234,  197,  196,  195,  624,  623,
 /*    30 */   301,  590,  584,   56,   56,   56,   56,  156,   54,   54,
 /*    40 */    54,   54,   53,   53,   52,   52,   52,   51,  234,  628,
 /*    50 */    57,   58,   48,  582,  581,  583,  583,   55,   55,   56,
 /*    60 */    56,   56,   56,  466,   54,   54,   54,   54,   53,   53,
 /*    70 */    52,   52,   52,   51,  234,  312,  597,   52,   52,   52,
 /*    80 */    51,  234,   33,   54,   54,   54,   54,   53,   53,   52,
 /*    90 */    52,   52,   51,  234,  624,  623,  621,  620,  165,  624,
 /*   100 */   623,  383,  380,  379,  214,  328,  590,  584,  624,  623,
 /*   110 */   467,   59,  378,  619,  618,  617,   53,   53,   52,   52,
 /*   120 */    52,   51,  234,  506,  507,   57,   58,   48,  582,  581,
 /*   130 */   583,  583,   55,   55,   56,   56,   56,   56,   30,   54,
 /*   140 */    54,   54,   54,   53,   53,   52,   52,   52,   51,  234,
 /*   150 */   312,   50,   47,  146,  233,  232,  207,  474,  256,  349,
 /*   160 */   255,  475,  621,  620,  554,  438,  298,  621,  620,  236,
 /*   170 */   674,  435,  440,  553,  439,  366,  621,  620,  540,  224,
 /*   180 */   551,  590,  584,  176,  138,  282,  386,  277,  385,  168,
 /*   190 */   600,  422,  951,  548,  622,  951,  273,  572,  572,  566,
 /*   200 */    57,   58,   48,  582,  581,  583,  583,   55,   55,   56,
 /*   210 */    56,   56,   56,  354,   54,   54,   54,   54,   53,   53,
 /*   220 */    52,   52,   52,   51,  234,  312,  561,  526,   62,  675,
 /*   230 */   132,  595,  410,  348,  579,  579,  492,  426,  577,  419,
 /*   240 */   627,   65,  329,  560,  441,  237,  676,  123,  607,   67,
 /*   250 */   542,  532,  622,  170,  205,  500,  590,  584,  166,  559,
 /*   260 */   622,  403,  593,  593,  593,  442,  443,  271,  422,  950,
 /*   270 */   166,  223,  950,  483,  190,   57,   58,   48,  582,  581,
 /*   280 */   583,  583,   55,   55,   56,   56,   56,   56,  600,   54,
 /*   290 */    54,   54,   54,   53,   53,   52,   52,   52,   51,  234,
 /*   300 */   312,  441,  412,  376,  175,  165,  166,  391,  383,  380,
 /*   310 */   379,  342,  412,  203,  426,   66,  392,  622,  415,  378,
 /*   320 */   597,  166,  442,  338,  444,  571,  601,   74,  415,  624,
 /*   330 */   623,  590,  584,  624,  623,  174,  601,   92,  333,  171,
 /*   340 */     1,  410,  597,  579,  579,  624,  623,  600,  306,  425,
 /*   350 */    57,   58,   48,  582,  581,  583,  583,   55,   55,   56,
 /*   360 */    56,   56,   56,  580,   54,   54,   54,   54,   53,   53,
 /*   370 */    52,   52,   52,   51,  234,  312,  472,  262,  399,   68,
 /*   380 */   412,  339,  571,  389,  624,  623,  578,  602,  597,  589,
 /*   390 */   588,  603,  412,  622,  423,  533,  415,  621,  620,  513,
 /*   400 */   257,  621,  620,  166,  601,   91,  590,  584,  415,   45,
 /*   410 */   597,  586,  585,  621,  620,  250,  601,   92,   39,  347,
 /*   420 */   576,  336,  597,  547,  567,   57,   58,   48,  582,  581,
 /*   430 */   583,  583,   55,   55,   56,   56,   56,   56,  587,   54,
 /*   440 */    54,   54,   54,   53,   53,   52,   52,   52,   51,  234,
 /*   450 */   312,  561,  621,  620,  531,  291,  470,  188,  399,  375,
 /*   460 */   247,  492,  249,  350,  412,  476,  476,  368,  560,  299,
 /*   470 */   334,  412,  281,  482,   67,  565,  410,  622,  579,  579,
 /*   480 */   415,  590,  584,  280,  559,  467,  520,  415,  601,   92,
 /*   490 */   597,  167,  544,   36,  877,  601,   16,  519,  564,    6,
 /*   500 */    57,   58,   48,  582,  581,  583,  583,   55,   55,   56,
 /*   510 */    56,   56,   56,  200,   54,   54,   54,   54,   53,   53,
 /*   520 */    52,   52,   52,   51,  234,  312,  183,  412,  236,  528,
 /*   530 */   395,  535,  358,  256,  349,  255,  397,  412,  248,  182,
 /*   540 */   353,  359,  549,  415,  236,  317,  563,   50,   47,  146,
 /*   550 */   273,  601,   73,  415,    7,  311,  590,  584,  568,  493,
 /*   560 */   213,  601,   92,  233,  232,  410,  173,  579,  579,  330,
 /*   570 */   575,  574,  631,  629,  332,   57,   58,   48,  582,  581,
 /*   580 */   583,  583,   55,   55,   56,   56,   56,   56,  199,   54,
 /*   590 */    54,   54,   54,   53,   53,   52,   52,   52,   51,  234,
 /*   600 */   312,  492,  340,  320,  511,  505,  572,  572,  460,  562,
 /*   610 */   549,  170,  145,  430,   67,  558,  410,  622,  579,  579,
 /*   620 */   384,  236,  600,  412,  408,  575,  574,  504,  572,  572,
 /*   630 */   571,  590,  584,  353,  198,  143,  268,  549,  316,  415,
 /*   640 */   306,  424,  207,   50,   47,  146,  167,  601,   69,  546,
 /*   650 */    57,   58,   48,  582,  581,  583,  583,   55,   55,   56,
 /*   660 */    56,   56,   56,  555,   54,   54,   54,   54,   53,   53,
 /*   670 */    52,   52,   52,   51,  234,  312,  600,  326,  412,  270,
 /*   680 */   145,  264,  274,  266,  459,  571,  423,   35,  412,  568,
 /*   690 */   407,  213,  428,  388,  415,  308,  212,  143,  622,  354,
 /*   700 */   317,   12,  601,   94,  415,  549,  590,  584,   50,   47,
 /*   710 */   146,  365,  601,   97,  552,  362,  318,  147,  602,  361,
 /*   720 */   325,   15,  603,  187,  206,   57,   58,   48,  582,  581,
 /*   730 */   583,  583,   55,   55,   56,   56,   56,   56,  412,   54,
 /*   740 */    54,   54,   54,   53,   53,   52,   52,   52,   51,  234,
 /*   750 */   312,  412,   35,  412,  415,   22,  630,    2,  600,   50,
 /*   760 */    47,  146,  601,   95,  412,  485,  510,  415,  412,  415,
 /*   770 */   412,   11,  235,  486,  412,  601,  104,  601,  103,   19,
 /*   780 */   415,  590,  584,  352,  415,   40,  415,   38,  601,  105,
 /*   790 */   415,   32,  601,  106,  601,  133,  544,  169,  601,  134,
 /*   800 */    57,   58,   48,  582,  581,  583,  583,   55,   55,   56,
 /*   810 */    56,   56,   56,  412,   54,   54,   54,   54,   53,   53,
 /*   820 */    52,   52,   52,   51,  234,  312,  412,  274,  412,  415,
 /*   830 */   412,  274,  274,  274,  201,  230,  721,  601,   98,  484,
 /*   840 */   427,  307,  415,  622,  415,  540,  415,  622,  622,  622,
 /*   850 */   601,  102,  601,  101,  601,   93,  590,  584,  262,   21,
 /*   860 */   129,  622,  522,  521,  554,  222,  469,  521,  600,  324,
 /*   870 */   323,  322,  211,  553,  622,   57,   58,   48,  582,  581,
 /*   880 */   583,  583,   55,   55,   56,   56,   56,   56,  412,   54,
 /*   890 */    54,   54,   54,   53,   53,   52,   52,   52,   51,  234,
 /*   900 */   312,  412,  261,  412,  415,  412,  600,  210,  625,  367,
 /*   910 */    51,  234,  601,  100,  538,  606,  142,  415,  355,  415,
 /*   920 */   412,  415,  412,  496,  622,  601,   77,  601,   96,  601,
 /*   930 */   137,  590,  584,  530,  622,  529,  415,  141,  415,   28,
 /*   940 */   524,  600,  229,  544,  601,  136,  601,  135,  604,  204,
 /*   950 */    57,   58,   48,  582,  581,  583,  583,   55,   55,   56,
 /*   960 */    56,   56,   56,  412,   54,   54,   54,   54,   53,   53,
 /*   970 */    52,   52,   52,   51,  234,  312,  412,  360,  412,  415,
 /*   980 */   412,  360,  286,  600,  503,  220,  127,  601,   76,  629,
 /*   990 */   332,  382,  415,  622,  415,  540,  415,  622,  412,  613,
 /*  1000 */   601,   90,  601,   89,  601,   75,  590,  584,  341,  272,
 /*  1010 */   377,  622,  126,   27,  415,  622,  164,  544,  125,  280,
 /*  1020 */   373,  122,  601,   88,  480,   57,   46,   48,  582,  581,
 /*  1030 */   583,  583,   55,   55,   56,   56,   56,   56,  412,   54,
 /*  1040 */    54,   54,   54,   53,   53,   52,   52,   52,   51,  234,
 /*  1050 */   312,  412,  360,  412,  415,  412,  284,  186,  369,  321,
 /*  1060 */   477,  170,  601,   87,  121,  473,  221,  415,  622,  415,
 /*  1070 */   254,  415,  412,  355,  412,  601,   99,  601,   86,  601,
 /*  1080 */    17,  590,  584,  259,  612,  120,  159,  158,  415,  622,
 /*  1090 */   415,   14,  465,  157,  462,   25,  601,   85,  601,   84,
 /*  1100 */   622,   58,   48,  582,  581,  583,  583,   55,   55,   56,
 /*  1110 */    56,   56,   56,  412,   54,   54,   54,   54,   53,   53,
 /*  1120 */    52,   52,   52,   51,  234,  312,  412,  262,  412,  415,
 /*  1130 */   412,  262,  118,  611,  117,   24,   10,  601,   83,  351,
 /*  1140 */   216,  219,  415,  622,  415,  608,  415,  622,  412,  622,
 /*  1150 */   601,   72,  601,   71,  601,   82,  590,  584,  262,    4,
 /*  1160 */   605,  622,  458,  115,  415,  456,  252,  154,  452,  110,
 /*  1170 */   108,  453,  601,   81,  622,  451,  622,   48,  582,  581,
 /*  1180 */   583,  583,   55,   55,   56,   56,   56,   56,  412,   54,
 /*  1190 */    54,   54,   54,   53,   53,   52,   52,   52,   51,  234,
 /*  1200 */    44,  406,  450,    3,  415,  412,  262,  107,  416,  623,
 /*  1210 */   446,  437,  601,   80,  436,  335,  238,  189,  411,  409,
 /*  1220 */   594,  415,  622,   44,  406,  401,    3,  412,  557,  601,
 /*  1230 */    70,  416,  623,  412,  622,  149,  622,  421,  404,   64,
 /*  1240 */   412,  622,  409,  415,  622,  331,  139,  148,  566,  415,
 /*  1250 */   449,  601,   18,  228,  124,  626,  415,  601,   79,  315,
 /*  1260 */   181,  404,  412,  545,  601,   78,  262,  541,   41,   42,
 /*  1270 */   534,  566,  390,  202,  262,   43,  414,  413,  415,  622,
 /*  1280 */   595,  314,  622,  622,  180,  539,  601,   92,  415,  276,
 /*  1290 */   622,   41,   42,  509,  616,  615,  601,    9,   43,  414,
 /*  1300 */   413,  622,  418,  595,  262,  622,  275,  600,  614,  622,
 /*  1310 */   218,  593,  593,  593,  592,  591,   13,  178,  217,  417,
 /*  1320 */   622,  236,  622,   44,  406,  490,    3,  269,  399,  267,
 /*  1330 */   609,  416,  623,  400,  593,  593,  593,  592,  591,   13,
 /*  1340 */   265,  622,  409,  622,  263,  622,   34,  406,  244,    3,
 /*  1350 */   258,  363,  464,  463,  416,  623,  622,  356,  251,    8,
 /*  1360 */   622,  404,  177,  599,  455,  409,  622,  622,  622,  622,
 /*  1370 */   445,  566,  243,  622,  622,  236,  295,  240,   31,  239,
 /*  1380 */   622,  431,   30,  396,  404,  290,  622,  294,  622,  293,
 /*  1390 */   144,   41,   42,  622,  566,  622,  394,  622,   43,  414,
 /*  1400 */   413,  622,  289,  595,  398,   60,  622,  292,   37,  231,
 /*  1410 */   598,  172,  622,   29,   41,   42,  393,  523,  622,  556,
 /*  1420 */   184,   43,  414,  413,  287,  387,  595,  543,  285,  518,
 /*  1430 */   537,  536,  517,  327,  593,  593,  593,  592,  591,   13,
 /*  1440 */   215,  283,  278,  514,  513,  304,  303,  302,  179,  300,
 /*  1450 */   512,  310,  454,  128,  227,  226,  309,  593,  593,  593,
 /*  1460 */   592,  591,   13,  494,  489,  225,  488,  150,  487,  242,
 /*  1470 */   163,   61,  374,  481,  162,  161,  624,  623,  241,  372,
 /*  1480 */   209,  479,  370,  260,   26,  160,  478,  364,  468,  471,
 /*  1490 */   140,  152,  119,  467,  131,  116,  155,  153,  345,  457,
 /*  1500 */   151,  346,  130,  114,  113,  112,  111,  448,  319,   23,
 /*  1510 */   109,  434,   20,  433,  432,  429,  566,  610,  573,  596,
 /*  1520 */    63,  405,  191,  279,  510,  296,  498,  288,  570,  495,
 /*  1530 */   499,  497,  461,  194,    5,  305,  193,  192,  381,  569,
 /*  1540 */   357,  256,  344,  245,  526,  246,  253,  313,  595,  343,
 /*  1550 */   447,  297,  236,  402,  550,  491,  508,  502,  501,  527,
 /*  1560 */   234,  208,  525,  962,  962,  962,  371,  962,  962,  962,
 /*  1570 */   962,  962,  962,  962,  962,  337,  962,  962,  962,  593,
 /*  1580 */   593,  593,
};
static const YYCODETYPE yy_lookahead[] = {
 /*     0 */    19,  143,  144,  145,  146,   24,    7,    8,   27,   78,
 /*    10 */    79,   80,   81,   82,   83,   84,   85,   86,   87,   88,
 /*    20 */    89,   90,   91,   92,   93,  106,  107,  108,   27,   28,
 /*    30 */    15,   50,   51,   78,   79,   80,   81,   26,   83,   84,
 /*    40 */    85,   86,   87,   88,   89,   90,   91,   92,   93,    1,
 /*    50 */    69,   70,   71,   72,   73,   74,   75,   76,   77,   78,
 /*    60 */    79,   80,   81,   11,   83,   84,   85,   86,   87,   88,
 /*    70 */    89,   90,   91,   92,   93,   19,   95,   89,   90,   91,
 /*    80 */    92,   93,   26,   83,   84,   85,   86,   87,   88,   89,
 /*    90 */    90,   91,   92,   93,   27,   28,   95,   96,   97,   27,
 /*   100 */    28,  100,  101,  102,   22,   19,   50,   51,   27,   28,
 /*   110 */    58,   55,  111,    7,    8,    9,   87,   88,   89,   90,
 /*   120 */    91,   92,   93,   98,   99,   69,   70,   71,   72,   73,
 /*   130 */    74,   75,   76,   77,   78,   79,   80,   81,  127,   83,
 /*   140 */    84,   85,   86,   87,   88,   89,   90,   91,   92,   93,
 /*   150 */    19,  223,  224,  225,   87,   88,  162,   31,  106,  107,
 /*   160 */   108,   35,   95,   96,   33,   98,   23,   95,   96,  117,
 /*   170 */   119,  243,  105,   42,  107,   49,   95,   96,  151,   93,
 /*   180 */    26,   50,   51,   97,   98,   99,  100,  101,  102,  103,
 /*   190 */   196,   22,   23,  121,  167,   26,  110,  130,  131,   67,
 /*   200 */    69,   70,   71,   72,   73,   74,   75,   76,   77,   78,
 /*   210 */    79,   80,   81,  219,   83,   84,   85,   86,   87,   88,
 /*   220 */    89,   90,   91,   92,   93,   19,   12,   95,  234,  119,
 /*   230 */    24,   99,  113,  239,  115,  116,  151,   68,   23,  147,
 /*   240 */   148,   26,  215,   29,  151,  153,  119,  155,  163,  164,
 /*   250 */    23,   23,  167,   26,  162,   23,   50,   51,   26,   45,
 /*   260 */   167,   47,  130,  131,  132,  172,  173,   23,   22,   23,
 /*   270 */    26,  186,   26,  188,  120,   69,   70,   71,   72,   73,
 /*   280 */    74,   75,   76,   77,   78,   79,   80,   81,  196,   83,
 /*   290 */    84,   85,   86,   87,   88,   89,   90,   91,   92,   93,
 /*   300 */    19,  151,  151,   23,  119,   97,   26,   19,  100,  101,
 /*   310 */   102,  219,  151,  162,   68,   22,   28,  167,  167,  111,
 /*   320 */    27,   26,  172,  173,  231,  232,  175,  176,  167,   27,
 /*   330 */    28,   50,   51,   27,   28,  119,  175,  176,  246,   24,
 /*   340 */    22,  113,   27,  115,  116,   27,   28,  196,   22,   23,
 /*   350 */    69,   70,   71,   72,   73,   74,   75,   76,   77,   78,
 /*   360 */    79,   80,   81,  114,   83,   84,   85,   86,   87,   88,
 /*   370 */    89,   90,   91,   92,   93,   19,   21,  151,  217,   22,
 /*   380 */   151,  231,  232,  222,   27,   28,   23,  114,   95,   50,
 /*   390 */    51,  118,  151,  167,   68,   89,  167,   95,   96,  104,
 /*   400 */    23,   95,   96,   26,  175,  176,   50,   51,  167,   22,
 /*   410 */    95,   72,   73,   95,   96,   16,  175,  176,  137,   64,
 /*   420 */    23,  195,   27,  121,   23,   69,   70,   71,   72,   73,
 /*   430 */    74,   75,   76,   77,   78,   79,   80,   81,   99,   83,
 /*   440 */    84,   85,   86,   87,   88,   89,   90,   91,   92,   93,
 /*   450 */    19,   12,   95,   96,   23,  226,  101,   22,  217,   19,
 /*   460 */    61,  151,   63,  222,  151,  106,  107,  108,   29,  159,
 /*   470 */   244,  151,   99,  163,  164,   23,  113,  167,  115,  116,
 /*   480 */   167,   50,   51,  110,   45,   58,   47,  167,  175,  176,
 /*   490 */    95,   51,  168,  137,  139,  175,  176,   58,   11,   22,
 /*   500 */    69,   70,   71,   72,   73,   74,   75,   76,   77,   78,
 /*   510 */    79,   80,   81,   22,   83,   84,   85,   86,   87,   88,
 /*   520 */    89,   90,   91,   92,   93,   19,   23,  151,  117,   23,
 /*   530 */   217,  207,   19,  106,  107,  108,  216,  151,  139,   23,
 /*   540 */   129,   28,   26,  167,  117,  105,   23,  223,  224,  225,
 /*   550 */   110,  175,  176,  167,   77,  165,   50,   51,  168,  169,
 /*   560 */   170,  175,  176,   87,   88,  113,   26,  115,  116,  171,
 /*   570 */   172,  173,    0,    1,    2,   69,   70,   71,   72,   73,
 /*   580 */    74,   75,   76,   77,   78,   79,   80,   81,  162,   83,
 /*   590 */    84,   85,   86,   87,   88,   89,   90,   91,   92,   93,
 /*   600 */    19,  151,   98,  217,   23,   37,  130,  131,   23,   23,
 /*   610 */    26,   26,   96,  163,  164,   23,  113,  167,  115,  116,
 /*   620 */    52,  117,  196,  151,  171,  172,  173,   59,  130,  131,
 /*   630 */   232,   50,   51,  129,  208,  209,   16,  121,  156,  167,
 /*   640 */    22,   23,  162,  223,  224,  225,   51,  175,  176,  121,
 /*   650 */    69,   70,   71,   72,   73,   74,   75,   76,   77,   78,
 /*   660 */    79,   80,   81,  178,   83,   84,   85,   86,   87,   88,
 /*   670 */    89,   90,   91,   92,   93,   19,  196,  109,  151,   23,
 /*   680 */    96,   61,  151,   63,   23,  232,   68,   26,  151,  168,
 /*   690 */   169,  170,   23,   89,  167,   26,  208,  209,  167,  219,
 /*   700 */   105,   36,  175,  176,  167,  121,   50,   51,  223,  224,
 /*   710 */   225,  229,  175,  176,  178,  233,  247,  248,  114,  239,
 /*   720 */   189,   22,  118,   24,  162,   69,   70,   71,   72,   73,
 /*   730 */    74,   75,   76,   77,   78,   79,   80,   81,  151,   83,
 /*   740 */    84,   85,   86,   87,   88,   89,   90,   91,   92,   93,
 /*   750 */    19,  151,   26,  151,  167,   24,  145,  146,  196,  223,
 /*   760 */   224,  225,  175,  176,  151,  182,  183,  167,  151,  167,
 /*   770 */   151,   36,  199,  190,  151,  175,  176,  175,  176,  206,
 /*   780 */   167,   50,   51,  221,  167,  136,  167,  138,  175,  176,
 /*   790 */   167,   26,  175,  176,  175,  176,  168,   36,  175,  176,
 /*   800 */    69,   70,   71,   72,   73,   74,   75,   76,   77,   78,
 /*   810 */    79,   80,   81,  151,   83,   84,   85,   86,   87,   88,
 /*   820 */    89,   90,   91,   92,   93,   19,  151,  151,  151,  167,
 /*   830 */   151,  151,  151,  151,  162,  207,   23,  175,  176,   26,
 /*   840 */   249,  250,  167,  167,  167,  151,  167,  167,  167,  167,
 /*   850 */   175,  176,  175,  176,  175,  176,   50,   51,  151,   53,
 /*   860 */    22,  167,  192,  193,   33,  189,  192,  193,  196,  189,
 /*   870 */   189,  189,  162,   42,  167,   69,   70,   71,   72,   73,
 /*   880 */    74,   75,   76,   77,   78,   79,   80,   81,  151,   83,
 /*   890 */    84,   85,   86,   87,   88,   89,   90,   91,   92,   93,
 /*   900 */    19,  151,  195,  151,  167,  151,  196,  162,  151,  215,
 /*   910 */    92,   93,  175,  176,   28,  174,  119,  167,  151,  167,
 /*   920 */   151,  167,  151,  182,  167,  175,  176,  175,  176,  175,
 /*   930 */   176,   50,   51,   23,  167,   23,  167,   40,  167,   22,
 /*   940 */   167,  196,   53,  168,  175,  176,  175,  176,  175,  162,
 /*   950 */    69,   70,   71,   72,   73,   74,   75,   76,   77,   78,
 /*   960 */    79,   80,   81,  151,   83,   84,   85,   86,   87,   88,
 /*   970 */    89,   90,   91,   92,   93,   19,  151,  151,  151,  167,
 /*   980 */   151,  151,  207,  196,   30,  218,   22,  175,  176,    1,
 /*   990 */     2,   53,  167,  167,  167,  151,  167,  167,  151,  151,
 /*  1000 */   175,  176,  175,  176,  175,  176,   50,   51,  221,   23,
 /*  1010 */    53,  167,   22,   22,  167,  167,  103,  168,   22,  110,
 /*  1020 */    19,  105,  175,  176,   20,   69,   70,   71,   72,   73,
 /*  1030 */    74,   75,   76,   77,   78,   79,   80,   81,  151,   83,
 /*  1040 */    84,   85,   86,   87,   88,   89,   90,   91,   92,   93,
 /*  1050 */    19,  151,  151,  151,  167,  151,  207,   24,   44,  215,
 /*  1060 */    60,   26,  175,  176,   54,   54,  240,  167,  167,  167,
 /*  1070 */   240,  167,  151,  151,  151,  175,  176,  175,  176,  175,
 /*  1080 */   176,   50,   51,  139,  151,   22,  105,  119,  167,  167,
 /*  1090 */   167,    5,    1,   36,   28,   77,  175,  176,  175,  176,
 /*  1100 */   167,   70,   71,   72,   73,   74,   75,   76,   77,   78,
 /*  1110 */    79,   80,   81,  151,   83,   84,   85,   86,   87,   88,
 /*  1120 */    89,   90,   91,   92,   93,   19,  151,  151,  151,  167,
 /*  1130 */   151,  151,  109,  151,  128,   77,   22,  175,  176,   26,
 /*  1140 */   218,  240,  167,  167,  167,  151,  167,  167,  151,  167,
 /*  1150 */   175,  176,  175,  176,  175,  176,   50,   51,  151,   22,
 /*  1160 */   151,  167,   23,  120,  167,    1,   16,  122,   20,  120,
 /*  1170 */   109,  195,  175,  176,  167,  195,  167,   71,   72,   73,
 /*  1180 */    74,   75,   76,   77,   78,   79,   80,   81,  151,   83,
 /*  1190 */    84,   85,   86,   87,   88,   89,   90,   91,   92,   93,
 /*  1200 */    19,   20,  195,   22,  167,  151,  151,  128,   27,   28,
 /*  1210 */   129,   23,  175,  176,   23,   66,  141,   22,  151,   38,
 /*  1220 */   151,  167,  167,   19,   20,  151,   22,  151,  151,  175,
 /*  1230 */   176,   27,   28,  151,  167,   15,  167,    4,   57,   16,
 /*  1240 */   151,  167,   38,  167,  167,    3,  166,  248,   67,  167,
 /*  1250 */   195,  175,  176,  181,  181,  150,  167,  175,  176,  251,
 /*  1260 */     6,   57,  151,  151,  175,  176,  151,  151,   87,   88,
 /*  1270 */    89,   67,  151,  162,  151,   94,   95,   96,  167,  167,
 /*  1280 */    99,  251,  167,  167,  152,  151,  175,  176,  167,  151,
 /*  1290 */   167,   87,   88,  151,  150,  150,  175,  176,   94,   95,
 /*  1300 */    96,  167,  150,   99,  151,  167,  151,  196,   13,  167,
 /*  1310 */   195,  130,  131,  132,  133,  134,  135,  152,  195,  160,
 /*  1320 */   167,  117,  167,   19,   20,  151,   22,  151,  217,  151,
 /*  1330 */   161,   27,   28,  222,  130,  131,  132,  133,  134,  135,
 /*  1340 */   151,  167,   38,  167,  151,  167,   19,   20,  195,   22,
 /*  1350 */   151,  151,  151,  151,   27,   28,  167,  151,  151,   26,
 /*  1360 */   167,   57,   25,  196,  151,   38,  167,  167,  167,  167,
 /*  1370 */   151,   67,  151,  167,  167,  117,  201,  151,  125,  151,
 /*  1380 */   167,  151,  127,  124,   57,  151,  167,  202,  167,  203,
 /*  1390 */   151,   87,   88,  167,   67,  167,  151,  167,   94,   95,
 /*  1400 */    96,  167,  151,   99,  123,  126,  167,  204,  136,  227,
 /*  1410 */   205,  119,  167,  105,   87,   88,  122,  177,  167,  158,
 /*  1420 */   158,   94,   95,   96,  212,  105,   99,  213,  212,  177,
 /*  1430 */   213,  213,  185,   48,  130,  131,  132,  133,  134,  135,
 /*  1440 */     5,  212,  177,  179,  104,   10,   11,   12,   13,   14,
 /*  1450 */   177,  180,   17,   22,  230,   93,  180,  130,  131,  132,
 /*  1460 */   133,  134,  135,  185,  177,  230,  177,   32,  177,   34,
 /*  1470 */   157,   22,   18,  158,  157,  157,   27,   28,   43,  158,
 /*  1480 */   158,  158,   46,  237,  136,  157,  238,  158,  191,  201,
 /*  1490 */    69,   56,  191,   58,  220,   22,  157,   62,   18,  201,
 /*  1500 */    65,  158,  220,  194,  194,  194,  194,  201,  158,  242,
 /*  1510 */   191,   41,  242,  158,  158,   39,   67,  154,  232,  168,
 /*  1520 */   245,  228,  198,  178,  183,  200,  168,  211,  232,  168,
 /*  1530 */   178,  178,  201,  187,  198,  149,   87,   88,  179,  168,
 /*  1540 */   241,  106,  107,  108,   95,  211,  241,  112,   99,  211,
 /*  1550 */   201,  197,  117,  193,  210,  188,  184,  184,  184,  175,
 /*  1560 */    93,  235,  175,  252,  252,  252,  236,  252,  252,  252,
 /*  1570 */   252,  252,  252,  252,  252,  140,  252,  252,  252,  130,
 /*  1580 */   131,  132,
};
#define YY_SHIFT_USE_DFLT (-82)
#define YY_SHIFT_COUNT (419)
#define YY_SHIFT_MIN   (-81)
#define YY_SHIFT_MAX   (1480)
static const short yy_shift_ofst[] = {
 /*     0 */   988, 1204, 1435, 1204, 1304, 1304,   67,   67,    1,  -19,
 /*    10 */  1304, 1304, 1304, 1304,  427,   81,  131,  131,  806, 1181,
 /*    20 */  1304, 1304, 1304, 1304, 1304, 1304, 1304, 1304, 1304, 1304,
 /*    30 */  1304, 1304, 1304, 1304, 1304, 1304, 1304, 1304, 1304, 1304,
 /*    40 */  1304, 1304, 1304, 1304, 1304, 1304, 1304, 1304, 1327, 1304,
 /*    50 */  1304, 1304, 1304, 1304, 1304, 1304, 1304, 1304, 1304, 1304,
 /*    60 */  1304, 1304,   52,   81,   81,  476,  476,  395, 1258,   56,
 /*    70 */   731,  656,  581,  506,  431,  356,  281,  206,  881,  881,
 /*    80 */   881,  881,  881,  881,  881,  881,  881,  881,  881,  881,
 /*    90 */   881,  881,  881,  956,  881, 1031, 1106, 1106,  -69,  -45,
 /*   100 */   -45,  -45,  -45,  -45,    0,   29,  -12,   81,   81,   81,
 /*   110 */    81,   81,   81,   81,   81,   81,   81,   81,   81,   81,
 /*   120 */    81,   81,   81,  355,  440,   81,   81,   81,   81,   81,
 /*   130 */   504,  411,  395,  818, 1467,  -82,  -82,  -82, 1449,   86,
 /*   140 */   439,  439,  306,  357,  302,   72,  318,  246,  169,   81,
 /*   150 */    81,   81,   81,   81,   81,   81,   81,   81,   81,   81,
 /*   160 */    81,   81,   81,   81,   81,   81,   81,   81,   81,   81,
 /*   170 */    81,   81,   81,   81,   81,   81,   81,   81,   81,   81,
 /*   180 */    81,   81,  315,  315,  315,  572, 1258, 1258, 1258,  -82,
 /*   190 */   -82,  -82,  132,  132,  208,  568,  568,  568,  516,  503,
 /*   200 */   214,  452,  363,  228,  119,  119,  119,  119,  359,  126,
 /*   210 */   119,  119,  584,  293,  604,  106,   11,  288,  288,  513,
 /*   220 */    11,  513,  295,  813,  395,  831,  395,  831,  595,  831,
 /*   230 */   288,  649,  498,  498,  395,  154,  273,  699, 1476, 1292,
 /*   240 */  1292, 1470, 1470, 1292, 1473, 1421, 1255, 1480, 1480, 1480,
 /*   250 */  1480, 1292, 1454, 1255, 1473, 1421, 1421, 1255, 1292, 1454,
 /*   260 */  1348, 1436, 1292, 1292, 1454, 1292, 1454, 1292, 1454, 1431,
 /*   270 */  1320, 1320, 1320, 1385, 1362, 1362, 1431, 1320, 1340, 1320,
 /*   280 */  1385, 1320, 1320, 1294, 1308, 1294, 1308, 1294, 1308, 1292,
 /*   290 */  1292, 1272, 1279, 1281, 1253, 1259, 1255, 1258, 1337, 1333,
 /*   300 */  1295, 1295, 1254, 1254, 1254, 1254,  -82,  -82,  -82,  -82,
 /*   310 */   -82,  -82,  339,  399,  618,  326,  620,  -81,  669,  477,
 /*   320 */   661,  585,  377,  280,  244,  232,   25,   -1,  373,  227,
 /*   330 */   215, 1233, 1242, 1195, 1075, 1220, 1149, 1223, 1191, 1188,
 /*   340 */  1081, 1113, 1079, 1061, 1049, 1148, 1045, 1150, 1164, 1043,
 /*   350 */  1139, 1137, 1113, 1114, 1006, 1058, 1018, 1023, 1066, 1057,
 /*   360 */   968, 1091, 1086, 1063,  981,  944, 1011, 1035, 1010, 1000,
 /*   370 */  1014,  916, 1033, 1004, 1001,  909,  913,  996,  957,  991,
 /*   380 */   990,  986,  964,  938,  954,  917,  889,  897,  912,  910,
 /*   390 */   797,  886,  761,  838,  528,  726,  735,  765,  665,  726,
 /*   400 */   592,  586,  540,  523,  491,  487,  435,  401,  397,  387,
 /*   410 */   249,  216,  185,  127,  110,   51,   82,  143,   15,   48,
};
#define YY_REDUCE_USE_DFLT (-143)
#define YY_REDUCE_COUNT (311)
#define YY_REDUCE_MIN   (-142)
#define YY_REDUCE_MAX   (1387)
static const short yy_reduce_ofst[] = {
 /*     0 */  -142, 1111,   92,  151,  241,  161,  150,   93,   85,  324,
 /*    10 */   386,  313,  320,  229,   -6,  310,  536,  485,  -72, 1121,
 /*    20 */  1089, 1082, 1076, 1054, 1037,  997,  979,  977,  975,  962,
 /*    30 */   923,  921,  904,  902,  900,  887,  847,  829,  827,  825,
 /*    40 */   812,  771,  769,  754,  752,  750,  737,  679,  677,  675,
 /*    50 */   662,  623,  619,  617,  613,  602,  600,  587,  537,  527,
 /*    60 */   472,  376,  480,  450,  226,  453,  398,  390,  426,  420,
 /*    70 */   420,  420,  420,  420,  420,  420,  420,  420,  420,  420,
 /*    80 */   420,  420,  420,  420,  420,  420,  420,  420,  420,  420,
 /*    90 */   420,  420,  420,  420,  420,  420,  420,  420,  420,  420,
 /*   100 */   420,  420,  420,  420,  420,  420,  420, 1153,  922, 1123,
 /*   110 */  1115, 1055, 1007,  980,  976,  901,  844,  830,  767,  826,
 /*   120 */   682,  694,  707,  482,  583,  681,  680,  676,  531,   27,
 /*   130 */   787,  562,  521,  420,  420,  420,  420,  420,  773,  741,
 /*   140 */   674,  670, 1067, 1251, 1245, 1239, 1234,  591,  591, 1230,
 /*   150 */  1228, 1226, 1221, 1219, 1213, 1207, 1206, 1202, 1201, 1200,
 /*   160 */  1199, 1193, 1189, 1178, 1176, 1174, 1155, 1142, 1138, 1134,
 /*   170 */  1116, 1112, 1077, 1074, 1069, 1067, 1009,  994,  982,  933,
 /*   180 */   848,  757,  849,  775,  628,  611,  745,  710,  672,  469,
 /*   190 */   488,  573, 1387, 1384, 1367, 1374, 1373, 1372, 1344, 1354,
 /*   200 */  1360, 1354, 1354, 1354, 1354, 1354, 1354, 1354, 1330, 1326,
 /*   210 */  1354, 1354, 1344, 1371, 1336, 1386, 1349, 1338, 1334, 1305,
 /*   220 */  1331, 1299, 1359, 1346, 1361, 1353, 1358, 1352, 1341, 1345,
 /*   230 */  1316, 1293, 1296, 1286, 1351, 1325, 1324, 1363, 1275, 1356,
 /*   240 */  1355, 1270, 1267, 1350, 1282, 1319, 1306, 1312, 1311, 1310,
 /*   250 */  1309, 1343, 1339, 1298, 1274, 1301, 1297, 1288, 1329, 1328,
 /*   260 */  1248, 1246, 1323, 1322, 1318, 1321, 1317, 1315, 1313, 1276,
 /*   270 */  1291, 1289, 1287, 1278, 1235, 1224, 1271, 1273, 1264, 1265,
 /*   280 */  1247, 1252, 1240, 1218, 1229, 1217, 1216, 1214, 1212, 1262,
 /*   290 */  1261, 1182, 1205, 1203, 1186, 1185, 1175, 1167, 1169, 1159,
 /*   300 */  1165, 1132, 1152, 1145, 1144, 1105, 1030, 1008,  999, 1073,
 /*   310 */  1072, 1080,
};
static const YYACTIONTYPE yy_default[] = {
 /*     0 */   636,  872,  960,  960,  872,  872,  960,  960,  960,  762,
 /*    10 */   960,  960,  960,  870,  960,  960,  790,  790,  934,  960,
 /*    20 */   960,  960,  960,  960,  960,  960,  960,  960,  960,  960,
 /*    30 */   960,  960,  960,  960,  960,  960,  960,  960,  960,  960,
 /*    40 */   960,  960,  960,  960,  960,  960,  960,  960,  960,  960,
 /*    50 */   960,  960,  960,  960,  960,  960,  960,  960,  960,  960,
 /*    60 */   960,  960,  960,  960,  960,  960,  960,  677,  766,  796,
 /*    70 */   960,  960,  960,  960,  960,  960,  960,  960,  933,  935,
 /*    80 */   804,  803,  913,  777,  801,  794,  798,  873,  866,  867,
 /*    90 */   865,  869,  874,  960,  797,  833,  850,  832,  844,  849,
 /*   100 */   856,  848,  845,  835,  834,  836,  837,  960,  960,  960,
 /*   110 */   960,  960,  960,  960,  960,  960,  960,  960,  960,  960,
 /*   120 */   960,  960,  960,  662,  731,  960,  960,  960,  960,  960,
 /*   130 */   960,  960,  960,  838,  839,  853,  852,  851,  960,  669,
 /*   140 */   960,  960,  960,  960,  960,  960,  960,  960,  960,  960,
 /*   150 */   940,  938,  960,  885,  960,  960,  960,  960,  960,  960,
 /*   160 */   960,  960,  960,  960,  960,  960,  960,  960,  960,  960,
 /*   170 */   960,  960,  960,  960,  960,  960,  960,  960,  960,  960,
 /*   180 */   960,  642,  762,  762,  762,  636,  960,  960,  960,  952,
 /*   190 */   766,  756,  960,  960,  960,  960,  960,  960,  960,  960,
 /*   200 */   960,  960,  960,  960,  806,  745,  923,  925,  960,  906,
 /*   210 */   743,  664,  764,  679,  754,  644,  800,  779,  779,  918,
 /*   220 */   800,  918,  702,  725,  960,  790,  960,  790,  699,  790,
 /*   230 */   779,  868,  960,  960,  960,  763,  754,  960,  945,  770,
 /*   240 */   770,  937,  937,  770,  812,  735,  800,  742,  742,  742,
 /*   250 */   742,  770,  659,  800,  812,  735,  735,  800,  770,  659,
 /*   260 */   912,  910,  770,  770,  659,  770,  659,  770,  659,  878,
 /*   270 */   733,  733,  733,  717,  882,  882,  878,  733,  702,  733,
 /*   280 */   717,  733,  733,  783,  778,  783,  778,  783,  778,  770,
 /*   290 */   770,  960,  795,  784,  793,  791,  800,  960,  665,  720,
 /*   300 */   652,  652,  641,  641,  641,  641,  957,  957,  952,  704,
 /*   310 */   704,  687,  960,  960,  960,  960,  960,  960,  960,  887,
 /*   320 */   960,  960,  960,  960,  960,  960,  960,  960,  960,  960,
 /*   330 */   960,  960,  637,  947,  960,  960,  944,  960,  960,  960,
 /*   340 */   960,  805,  960,  960,  960,  960,  960,  960,  960,  960,
 /*   350 */   960,  960,  922,  960,  960,  960,  960,  960,  960,  960,
 /*   360 */   916,  960,  960,  960,  960,  960,  960,  909,  908,  960,
 /*   370 */   960,  960,  960,  960,  960,  960,  960,  960,  960,  960,
 /*   380 */   960,  960,  960,  960,  960,  960,  960,  960,  960,  960,
 /*   390 */   960,  960,  960,  960,  960,  792,  960,  785,  960,  871,
 /*   400 */   960,  960,  960,  960,  960,  960,  960,  960,  960,  960,
 /*   410 */   748,  821,  960,  820,  824,  819,  671,  960,  650,  960,
 /*   420 */   633,  638,  956,  959,  958,  955,  954,  953,  948,  946,
 /*   430 */   943,  942,  941,  939,  936,  932,  891,  889,  896,  895,
 /*   440 */   894,  893,  892,  890,  888,  886,  807,  802,  799,  931,
 /*   450 */   884,  744,  741,  740,  658,  949,  915,  924,  811,  810,
 /*   460 */   813,  921,  920,  919,  917,  914,  901,  809,  808,  736,
 /*   470 */   876,  875,  661,  905,  904,  903,  907,  911,  902,  772,
 /*   480 */   660,  657,  668,  723,  724,  732,  730,  729,  728,  727,
 /*   490 */   726,  722,  670,  678,  716,  701,  700,  881,  883,  880,
 /*   500 */   879,  709,  708,  714,  713,  712,  711,  710,  707,  706,
 /*   510 */   705,  698,  697,  703,  696,  719,  718,  715,  695,  739,
 /*   520 */   738,  737,  734,  694,  693,  692,  824,  691,  690,  830,
 /*   530 */   829,  817,  860,  759,  758,  757,  769,  768,  781,  780,
 /*   540 */   815,  814,  782,  767,  761,  760,  776,  775,  774,  773,
 /*   550 */   765,  755,  787,  789,  788,  786,  862,  771,  859,  930,
 /*   560 */   929,  928,  927,  926,  864,  863,  831,  828,  682,  683,
 /*   570 */   899,  898,  900,  897,  685,  684,  681,  680,  861,  750,
 /*   580 */   749,  857,  854,  846,  842,  858,  855,  847,  843,  841,
 /*   590 */   840,  826,  825,  823,  822,  818,  827,  673,  751,  747,
 /*   600 */   746,  816,  753,  752,  689,  688,  686,  667,  666,  663,
 /*   610 */   656,  654,  653,  655,  651,  649,  648,  647,  646,  645,
 /*   620 */   676,  675,  674,  672,  671,  643,  640,  639,  635,  634,
 /*   630 */   632,
};

/* The next table maps tokens into fallback tokens.  If a construct
** like the following:
** 
**      %fallback ID X Y Z.
**
................................................................................
   27,  /*      MATCH => ID */
   27,  /*         NO => ID */
   27,  /*        KEY => ID */
   27,  /*         OF => ID */
   27,  /*     OFFSET => ID */
   27,  /*     PRAGMA => ID */
   27,  /*      RAISE => ID */

   27,  /*    REPLACE => ID */
   27,  /*   RESTRICT => ID */
   27,  /*        ROW => ID */
   27,  /*    TRIGGER => ID */
   27,  /*     VACUUM => ID */
   27,  /*       VIEW => ID */
   27,  /*    VIRTUAL => ID */

   27,  /*    REINDEX => ID */
   27,  /*     RENAME => ID */
   27,  /*   CTIME_KW => ID */
};
#endif /* YYFALLBACK */

/* The following structure represents a single element of the
................................................................................
  "INDEXED",       "ABORT",         "ACTION",        "AFTER",       
  "ANALYZE",       "ASC",           "ATTACH",        "BEFORE",      
  "BY",            "CASCADE",       "CAST",          "COLUMNKW",    
  "CONFLICT",      "DATABASE",      "DESC",          "DETACH",      
  "EACH",          "FAIL",          "FOR",           "IGNORE",      
  "INITIALLY",     "INSTEAD",       "LIKE_KW",       "MATCH",       
  "NO",            "KEY",           "OF",            "OFFSET",      
  "PRAGMA",        "RAISE",         "REPLACE",       "RESTRICT",    
  "ROW",           "TRIGGER",       "VACUUM",        "VIEW",        

  "VIRTUAL",       "REINDEX",       "RENAME",        "CTIME_KW",    
  "ANY",           "OR",            "AND",           "IS",          
  "BETWEEN",       "IN",            "ISNULL",        "NOTNULL",     
  "NE",            "EQ",            "GT",            "LE",          
  "LT",            "GE",            "ESCAPE",        "BITAND",      
  "BITOR",         "LSHIFT",        "RSHIFT",        "PLUS",        
  "MINUS",         "STAR",          "SLASH",         "REM",         
  "CONCAT",        "COLLATE",       "BITNOT",        "STRING",      
  "JOIN_KW",       "CONSTRAINT",    "DEFAULT",       "NULL",        
  "PRIMARY",       "UNIQUE",        "CHECK",         "REFERENCES",  
  "AUTOINCR",      "ON",            "INSERT",        "DELETE",      
  "UPDATE",        "SET",           "DEFERRABLE",    "FOREIGN",     
  "DROP",          "UNION",         "ALL",           "EXCEPT",      
  "INTERSECT",     "SELECT",        "DISTINCT",      "DOT",         
  "FROM",          "JOIN",          "USING",         "ORDER",       
  "GROUP",         "HAVING",        "LIMIT",         "WHERE",       
  "INTO",          "VALUES",        "INTEGER",       "FLOAT",       
  "BLOB",          "REGISTER",      "VARIABLE",      "CASE",        
  "WHEN",          "THEN",          "ELSE",          "INDEX",       
  "ALTER",         "ADD",           "error",         "input",       
  "cmdlist",       "ecmd",          "explain",       "cmdx",        
  "cmd",           "transtype",     "trans_opt",     "nm",          
  "savepoint_opt",  "create_table",  "create_table_args",  "createkw",    
  "temp",          "ifnotexists",   "dbnm",          "columnlist",  
  "conslist_opt",  "table_options",  "select",        "column",      
  "columnid",      "type",          "carglist",      "id",          
  "ids",           "typetoken",     "typename",      "signed",      
  "plus_num",      "minus_num",     "ccons",         "term",        
  "expr",          "onconf",        "sortorder",     "autoinc",     
  "idxlist_opt",   "refargs",       "defer_subclause",  "refarg",      
  "refact",        "init_deferred_pred_opt",  "conslist",      "tconscomma",  
  "tcons",         "idxlist",       "defer_subclause_opt",  "orconf",      
  "resolvetype",   "raisetype",     "ifexists",      "fullname",    
  "oneselect",     "multiselect_op",  "distinct",      "selcollist",  
  "from",          "where_opt",     "groupby_opt",   "having_opt",  
  "orderby_opt",   "limit_opt",     "sclp",          "as",          

  "seltablist",    "stl_prefix",    "joinop",        "indexed_opt", 
  "on_opt",        "using_opt",     "joinop2",       "idlist",      
  "sortlist",      "nexprlist",     "setlist",       "insert_cmd",  
  "inscollist_opt",  "valuelist",     "exprlist",      "likeop",      
  "between_op",    "in_op",         "case_operand",  "case_exprlist",
  "case_else",     "uniqueflag",    "collate",       "nmnum",       
  "number",        "trigger_decl",  "trigger_cmd_list",  "trigger_time",
  "trigger_event",  "foreach_clause",  "when_clause",   "trigger_cmd", 
  "trnm",          "tridxby",       "database_kw_opt",  "key_opt",     
  "add_column_fullname",  "kwcolumn_opt",  "create_vtab",   "vtabarglist", 
  "vtabarg",       "vtabargtoken",  "lp",            "anylist",     

};
#endif /* NDEBUG */

#ifndef NDEBUG
/* For tracing reduce actions, the names of all rules are required.
*/
static const char *const yyRuleName[] = {
................................................................................
 /*  33 */ "create_table_args ::= AS select",
 /*  34 */ "table_options ::=",
 /*  35 */ "table_options ::= WITHOUT nm",
 /*  36 */ "columnlist ::= columnlist COMMA column",
 /*  37 */ "columnlist ::= column",
 /*  38 */ "column ::= columnid type carglist",
 /*  39 */ "columnid ::= nm",
 /*  40 */ "id ::= ID",
 /*  41 */ "id ::= INDEXED",
 /*  42 */ "ids ::= ID|STRING",
 /*  43 */ "nm ::= id",
 /*  44 */ "nm ::= STRING",
 /*  45 */ "nm ::= JOIN_KW",
 /*  46 */ "type ::=",
 /*  47 */ "type ::= typetoken",
 /*  48 */ "typetoken ::= typename",
 /*  49 */ "typetoken ::= typename LP signed RP",
 /*  50 */ "typetoken ::= typename LP signed COMMA signed RP",
 /*  51 */ "typename ::= ids",
 /*  52 */ "typename ::= typename ids",
 /*  53 */ "signed ::= plus_num",
 /*  54 */ "signed ::= minus_num",
 /*  55 */ "carglist ::= carglist ccons",
 /*  56 */ "carglist ::=",
 /*  57 */ "ccons ::= CONSTRAINT nm",
 /*  58 */ "ccons ::= DEFAULT term",
 /*  59 */ "ccons ::= DEFAULT LP expr RP",
 /*  60 */ "ccons ::= DEFAULT PLUS term",
 /*  61 */ "ccons ::= DEFAULT MINUS term",
 /*  62 */ "ccons ::= DEFAULT id",
 /*  63 */ "ccons ::= NULL onconf",
 /*  64 */ "ccons ::= NOT NULL onconf",
 /*  65 */ "ccons ::= PRIMARY KEY sortorder onconf autoinc",
 /*  66 */ "ccons ::= UNIQUE onconf",
 /*  67 */ "ccons ::= CHECK LP expr RP",
 /*  68 */ "ccons ::= REFERENCES nm idxlist_opt refargs",
 /*  69 */ "ccons ::= defer_subclause",
 /*  70 */ "ccons ::= COLLATE ids",
 /*  71 */ "autoinc ::=",
 /*  72 */ "autoinc ::= AUTOINCR",
 /*  73 */ "refargs ::=",
 /*  74 */ "refargs ::= refargs refarg",
 /*  75 */ "refarg ::= MATCH nm",
 /*  76 */ "refarg ::= ON INSERT refact",
 /*  77 */ "refarg ::= ON DELETE refact",
 /*  78 */ "refarg ::= ON UPDATE refact",
 /*  79 */ "refact ::= SET NULL",
 /*  80 */ "refact ::= SET DEFAULT",
 /*  81 */ "refact ::= CASCADE",
 /*  82 */ "refact ::= RESTRICT",
 /*  83 */ "refact ::= NO ACTION",
 /*  84 */ "defer_subclause ::= NOT DEFERRABLE init_deferred_pred_opt",
 /*  85 */ "defer_subclause ::= DEFERRABLE init_deferred_pred_opt",
 /*  86 */ "init_deferred_pred_opt ::=",
 /*  87 */ "init_deferred_pred_opt ::= INITIALLY DEFERRED",
 /*  88 */ "init_deferred_pred_opt ::= INITIALLY IMMEDIATE",
 /*  89 */ "conslist_opt ::=",
 /*  90 */ "conslist_opt ::= COMMA conslist",
 /*  91 */ "conslist ::= conslist tconscomma tcons",
 /*  92 */ "conslist ::= tcons",
 /*  93 */ "tconscomma ::= COMMA",
 /*  94 */ "tconscomma ::=",
 /*  95 */ "tcons ::= CONSTRAINT nm",
 /*  96 */ "tcons ::= PRIMARY KEY LP idxlist autoinc RP onconf",
 /*  97 */ "tcons ::= UNIQUE LP idxlist RP onconf",
 /*  98 */ "tcons ::= CHECK LP expr RP onconf",
 /*  99 */ "tcons ::= FOREIGN KEY LP idxlist RP REFERENCES nm idxlist_opt refargs defer_subclause_opt",
 /* 100 */ "defer_subclause_opt ::=",
 /* 101 */ "defer_subclause_opt ::= defer_subclause",
 /* 102 */ "onconf ::=",
 /* 103 */ "onconf ::= ON CONFLICT resolvetype",
 /* 104 */ "orconf ::=",
 /* 105 */ "orconf ::= OR resolvetype",
 /* 106 */ "resolvetype ::= raisetype",
 /* 107 */ "resolvetype ::= IGNORE",
 /* 108 */ "resolvetype ::= REPLACE",
 /* 109 */ "cmd ::= DROP TABLE ifexists fullname",
 /* 110 */ "ifexists ::= IF EXISTS",
 /* 111 */ "ifexists ::=",
 /* 112 */ "cmd ::= createkw temp VIEW ifnotexists nm dbnm AS select",
 /* 113 */ "cmd ::= DROP VIEW ifexists fullname",
 /* 114 */ "cmd ::= select",

 /* 115 */ "select ::= oneselect",
 /* 116 */ "select ::= select multiselect_op oneselect",
 /* 117 */ "multiselect_op ::= UNION",
 /* 118 */ "multiselect_op ::= UNION ALL",
 /* 119 */ "multiselect_op ::= EXCEPT|INTERSECT",
 /* 120 */ "oneselect ::= SELECT distinct selcollist from where_opt groupby_opt having_opt orderby_opt limit_opt",



 /* 121 */ "distinct ::= DISTINCT",
 /* 122 */ "distinct ::= ALL",
 /* 123 */ "distinct ::=",
 /* 124 */ "sclp ::= selcollist COMMA",
 /* 125 */ "sclp ::=",
 /* 126 */ "selcollist ::= sclp expr as",
 /* 127 */ "selcollist ::= sclp STAR",
 /* 128 */ "selcollist ::= sclp nm DOT STAR",
 /* 129 */ "as ::= AS nm",
 /* 130 */ "as ::= ids",
 /* 131 */ "as ::=",
 /* 132 */ "from ::=",

 /* 133 */ "from ::= FROM seltablist",
 /* 134 */ "stl_prefix ::= seltablist joinop",
 /* 135 */ "stl_prefix ::=",
 /* 136 */ "seltablist ::= stl_prefix nm dbnm as indexed_opt on_opt using_opt",
 /* 137 */ "seltablist ::= stl_prefix LP select RP as on_opt using_opt",
 /* 138 */ "seltablist ::= stl_prefix LP seltablist RP as on_opt using_opt",
 /* 139 */ "dbnm ::=",
 /* 140 */ "dbnm ::= DOT nm",
 /* 141 */ "fullname ::= nm dbnm",
 /* 142 */ "joinop ::= COMMA|JOIN",
 /* 143 */ "joinop ::= JOIN_KW JOIN",
 /* 144 */ "joinop ::= JOIN_KW nm JOIN",
 /* 145 */ "joinop ::= JOIN_KW nm nm JOIN",
 /* 146 */ "on_opt ::= ON expr",
 /* 147 */ "on_opt ::=",
 /* 148 */ "indexed_opt ::=",
 /* 149 */ "indexed_opt ::= INDEXED BY nm",
 /* 150 */ "indexed_opt ::= NOT INDEXED",
 /* 151 */ "using_opt ::= USING LP idlist RP",
 /* 152 */ "using_opt ::=",
 /* 153 */ "orderby_opt ::=",
 /* 154 */ "orderby_opt ::= ORDER BY sortlist",
 /* 155 */ "sortlist ::= sortlist COMMA expr sortorder",
 /* 156 */ "sortlist ::= expr sortorder",
 /* 157 */ "sortorder ::= ASC",
 /* 158 */ "sortorder ::= DESC",
 /* 159 */ "sortorder ::=",
 /* 160 */ "groupby_opt ::=",
 /* 161 */ "groupby_opt ::= GROUP BY nexprlist",
 /* 162 */ "having_opt ::=",
 /* 163 */ "having_opt ::= HAVING expr",
 /* 164 */ "limit_opt ::=",
 /* 165 */ "limit_opt ::= LIMIT expr",
 /* 166 */ "limit_opt ::= LIMIT expr OFFSET expr",
 /* 167 */ "limit_opt ::= LIMIT expr COMMA expr",
 /* 168 */ "cmd ::= DELETE FROM fullname indexed_opt where_opt",
 /* 169 */ "where_opt ::=",
 /* 170 */ "where_opt ::= WHERE expr",
 /* 171 */ "cmd ::= UPDATE orconf fullname indexed_opt SET setlist where_opt",
 /* 172 */ "setlist ::= setlist COMMA nm EQ expr",
 /* 173 */ "setlist ::= nm EQ expr",
 /* 174 */ "cmd ::= insert_cmd INTO fullname inscollist_opt valuelist",
 /* 175 */ "cmd ::= insert_cmd INTO fullname inscollist_opt select",
 /* 176 */ "cmd ::= insert_cmd INTO fullname inscollist_opt DEFAULT VALUES",
 /* 177 */ "insert_cmd ::= INSERT orconf",
 /* 178 */ "insert_cmd ::= REPLACE",
 /* 179 */ "valuelist ::= VALUES LP nexprlist RP",
 /* 180 */ "valuelist ::= valuelist COMMA LP exprlist RP",
 /* 181 */ "inscollist_opt ::=",
 /* 182 */ "inscollist_opt ::= LP idlist RP",
 /* 183 */ "idlist ::= idlist COMMA nm",
 /* 184 */ "idlist ::= nm",
 /* 185 */ "expr ::= term",
 /* 186 */ "expr ::= LP expr RP",
 /* 187 */ "term ::= NULL",
 /* 188 */ "expr ::= id",

 /* 189 */ "expr ::= JOIN_KW",
 /* 190 */ "expr ::= nm DOT nm",
 /* 191 */ "expr ::= nm DOT nm DOT nm",
 /* 192 */ "term ::= INTEGER|FLOAT|BLOB",
 /* 193 */ "term ::= STRING",
 /* 194 */ "expr ::= REGISTER",
 /* 195 */ "expr ::= VARIABLE",
 /* 196 */ "expr ::= expr COLLATE ids",
 /* 197 */ "expr ::= CAST LP expr AS typetoken RP",
 /* 198 */ "expr ::= ID LP distinct exprlist RP",
 /* 199 */ "expr ::= ID LP STAR RP",

 /* 200 */ "term ::= CTIME_KW",
 /* 201 */ "expr ::= expr AND expr",
 /* 202 */ "expr ::= expr OR expr",
 /* 203 */ "expr ::= expr LT|GT|GE|LE expr",
 /* 204 */ "expr ::= expr EQ|NE expr",
 /* 205 */ "expr ::= expr BITAND|BITOR|LSHIFT|RSHIFT expr",
 /* 206 */ "expr ::= expr PLUS|MINUS expr",
 /* 207 */ "expr ::= expr STAR|SLASH|REM expr",
 /* 208 */ "expr ::= expr CONCAT expr",
 /* 209 */ "likeop ::= LIKE_KW",
 /* 210 */ "likeop ::= NOT LIKE_KW",
 /* 211 */ "likeop ::= MATCH",
 /* 212 */ "likeop ::= NOT MATCH",
 /* 213 */ "expr ::= expr likeop expr",
 /* 214 */ "expr ::= expr likeop expr ESCAPE expr",
 /* 215 */ "expr ::= expr ISNULL|NOTNULL",
 /* 216 */ "expr ::= expr NOT NULL",
 /* 217 */ "expr ::= expr IS expr",
 /* 218 */ "expr ::= expr IS NOT expr",
 /* 219 */ "expr ::= NOT expr",
 /* 220 */ "expr ::= BITNOT expr",
 /* 221 */ "expr ::= MINUS expr",
 /* 222 */ "expr ::= PLUS expr",
 /* 223 */ "between_op ::= BETWEEN",
 /* 224 */ "between_op ::= NOT BETWEEN",
 /* 225 */ "expr ::= expr between_op expr AND expr",
 /* 226 */ "in_op ::= IN",
 /* 227 */ "in_op ::= NOT IN",
 /* 228 */ "expr ::= expr in_op LP exprlist RP",
 /* 229 */ "expr ::= LP select RP",
 /* 230 */ "expr ::= expr in_op LP select RP",
 /* 231 */ "expr ::= expr in_op nm dbnm",
 /* 232 */ "expr ::= EXISTS LP select RP",
 /* 233 */ "expr ::= CASE case_operand case_exprlist case_else END",
 /* 234 */ "case_exprlist ::= case_exprlist WHEN expr THEN expr",
 /* 235 */ "case_exprlist ::= WHEN expr THEN expr",
 /* 236 */ "case_else ::= ELSE expr",
 /* 237 */ "case_else ::=",
 /* 238 */ "case_operand ::= expr",
 /* 239 */ "case_operand ::=",
 /* 240 */ "exprlist ::= nexprlist",
 /* 241 */ "exprlist ::=",
 /* 242 */ "nexprlist ::= nexprlist COMMA expr",
 /* 243 */ "nexprlist ::= expr",
 /* 244 */ "cmd ::= createkw uniqueflag INDEX ifnotexists nm dbnm ON nm LP idxlist RP where_opt",
 /* 245 */ "uniqueflag ::= UNIQUE",
 /* 246 */ "uniqueflag ::=",
 /* 247 */ "idxlist_opt ::=",
 /* 248 */ "idxlist_opt ::= LP idxlist RP",
 /* 249 */ "idxlist ::= idxlist COMMA nm collate sortorder",
 /* 250 */ "idxlist ::= nm collate sortorder",
 /* 251 */ "collate ::=",
 /* 252 */ "collate ::= COLLATE ids",
 /* 253 */ "cmd ::= DROP INDEX ifexists fullname",
 /* 254 */ "cmd ::= VACUUM",
 /* 255 */ "cmd ::= VACUUM nm",
 /* 256 */ "cmd ::= PRAGMA nm dbnm",
 /* 257 */ "cmd ::= PRAGMA nm dbnm EQ nmnum",
 /* 258 */ "cmd ::= PRAGMA nm dbnm LP nmnum RP",
 /* 259 */ "cmd ::= PRAGMA nm dbnm EQ minus_num",
 /* 260 */ "cmd ::= PRAGMA nm dbnm LP minus_num RP",
 /* 261 */ "nmnum ::= plus_num",
 /* 262 */ "nmnum ::= nm",
 /* 263 */ "nmnum ::= ON",
 /* 264 */ "nmnum ::= DELETE",
 /* 265 */ "nmnum ::= DEFAULT",
 /* 266 */ "plus_num ::= PLUS number",
 /* 267 */ "plus_num ::= number",
 /* 268 */ "minus_num ::= MINUS number",
 /* 269 */ "number ::= INTEGER|FLOAT",
 /* 270 */ "cmd ::= createkw trigger_decl BEGIN trigger_cmd_list END",
 /* 271 */ "trigger_decl ::= temp TRIGGER ifnotexists nm dbnm trigger_time trigger_event ON fullname foreach_clause when_clause",
 /* 272 */ "trigger_time ::= BEFORE",
 /* 273 */ "trigger_time ::= AFTER",
 /* 274 */ "trigger_time ::= INSTEAD OF",
 /* 275 */ "trigger_time ::=",
 /* 276 */ "trigger_event ::= DELETE|INSERT",
 /* 277 */ "trigger_event ::= UPDATE",
 /* 278 */ "trigger_event ::= UPDATE OF idlist",
 /* 279 */ "foreach_clause ::=",
 /* 280 */ "foreach_clause ::= FOR EACH ROW",
 /* 281 */ "when_clause ::=",
 /* 282 */ "when_clause ::= WHEN expr",
 /* 283 */ "trigger_cmd_list ::= trigger_cmd_list trigger_cmd SEMI",
 /* 284 */ "trigger_cmd_list ::= trigger_cmd SEMI",
 /* 285 */ "trnm ::= nm",
 /* 286 */ "trnm ::= nm DOT nm",
 /* 287 */ "tridxby ::=",
 /* 288 */ "tridxby ::= INDEXED BY nm",
 /* 289 */ "tridxby ::= NOT INDEXED",
 /* 290 */ "trigger_cmd ::= UPDATE orconf trnm tridxby SET setlist where_opt",
 /* 291 */ "trigger_cmd ::= insert_cmd INTO trnm inscollist_opt valuelist",
 /* 292 */ "trigger_cmd ::= insert_cmd INTO trnm inscollist_opt select",
 /* 293 */ "trigger_cmd ::= DELETE FROM trnm tridxby where_opt",
 /* 294 */ "trigger_cmd ::= select",
 /* 295 */ "expr ::= RAISE LP IGNORE RP",
 /* 296 */ "expr ::= RAISE LP raisetype COMMA nm RP",
 /* 297 */ "raisetype ::= ROLLBACK",
 /* 298 */ "raisetype ::= ABORT",
 /* 299 */ "raisetype ::= FAIL",
 /* 300 */ "cmd ::= DROP TRIGGER ifexists fullname",
 /* 301 */ "cmd ::= ATTACH database_kw_opt expr AS expr key_opt",
 /* 302 */ "cmd ::= DETACH database_kw_opt expr",
 /* 303 */ "key_opt ::=",
 /* 304 */ "key_opt ::= KEY expr",
 /* 305 */ "database_kw_opt ::= DATABASE",
 /* 306 */ "database_kw_opt ::=",
 /* 307 */ "cmd ::= REINDEX",
 /* 308 */ "cmd ::= REINDEX nm dbnm",
 /* 309 */ "cmd ::= ANALYZE",
 /* 310 */ "cmd ::= ANALYZE nm dbnm",
 /* 311 */ "cmd ::= ALTER TABLE fullname RENAME TO nm",
 /* 312 */ "cmd ::= ALTER TABLE add_column_fullname ADD kwcolumn_opt column",
 /* 313 */ "add_column_fullname ::= fullname",
 /* 314 */ "kwcolumn_opt ::=",
 /* 315 */ "kwcolumn_opt ::= COLUMNKW",
 /* 316 */ "cmd ::= create_vtab",
 /* 317 */ "cmd ::= create_vtab LP vtabarglist RP",
 /* 318 */ "create_vtab ::= createkw VIRTUAL TABLE ifnotexists nm dbnm USING nm",
 /* 319 */ "vtabarglist ::= vtabarg",
 /* 320 */ "vtabarglist ::= vtabarglist COMMA vtabarg",
 /* 321 */ "vtabarg ::=",
 /* 322 */ "vtabarg ::= vtabarg vtabargtoken",
 /* 323 */ "vtabargtoken ::= ANY",
 /* 324 */ "vtabargtoken ::= lp anylist RP",
 /* 325 */ "lp ::= LP",
 /* 326 */ "anylist ::=",
 /* 327 */ "anylist ::= anylist LP anylist RP",
 /* 328 */ "anylist ::= anylist ANY",





};
#endif /* NDEBUG */


#if YYSTACKDEPTH<=0
/*
** Try to increase the size of the parser stack.
................................................................................
    ** reduce or during error processing or when a parser is 
    ** being destroyed before it is finished parsing.
    **
    ** Note: during a reduce, the only symbols destroyed are those
    ** which appear on the RHS of the rule, but which are not used
    ** inside the C code.
    */
    case 162: /* select */

    case 196: /* oneselect */

{
sqlite3SelectDelete(pParse->db, (yypminor->yy387));
}
      break;
    case 175: /* term */
    case 176: /* expr */
{
sqlite3ExprDelete(pParse->db, (yypminor->yy118).pExpr);
}
      break;
    case 180: /* idxlist_opt */
    case 189: /* idxlist */
    case 199: /* selcollist */
    case 202: /* groupby_opt */
    case 204: /* orderby_opt */


    case 206: /* sclp */
    case 216: /* sortlist */
    case 217: /* nexprlist */
    case 218: /* setlist */
    case 222: /* exprlist */
    case 227: /* case_exprlist */
{
sqlite3ExprListDelete(pParse->db, (yypminor->yy322));
}
      break;
    case 195: /* fullname */
    case 200: /* from */
    case 208: /* seltablist */
    case 209: /* stl_prefix */
{
sqlite3SrcListDelete(pParse->db, (yypminor->yy259));
}
      break;






    case 201: /* where_opt */
    case 203: /* having_opt */
    case 212: /* on_opt */
    case 226: /* case_operand */
    case 228: /* case_else */
    case 238: /* when_clause */
    case 243: /* key_opt */
{
sqlite3ExprDelete(pParse->db, (yypminor->yy314));
}
      break;
    case 213: /* using_opt */
    case 215: /* idlist */
    case 220: /* inscollist_opt */
{
sqlite3IdListDelete(pParse->db, (yypminor->yy384));
}
      break;
    case 221: /* valuelist */
{

  sqlite3ExprListDelete(pParse->db, (yypminor->yy260).pList);
  sqlite3SelectDelete(pParse->db, (yypminor->yy260).pSelect);

}
      break;
    case 234: /* trigger_cmd_list */
    case 239: /* trigger_cmd */
{
sqlite3DeleteTriggerStep(pParse->db, (yypminor->yy203));
}
      break;
    case 236: /* trigger_event */
{
sqlite3IdListDelete(pParse->db, (yypminor->yy90).b);
}
      break;
    default:  break;   /* If no destructor action specified: do nothing */
  }
}

/*
................................................................................
/* The following table contains information about every rule that
** is used during the reduce.
*/
static const struct {
  YYCODETYPE lhs;         /* Symbol on the left-hand side of the rule */
  unsigned char nrhs;     /* Number of right-hand side symbols in the rule */
} yyRuleInfo[] = {
  { 143, 1 },
  { 144, 2 },
  { 144, 1 },
  { 145, 1 },
  { 145, 3 },
  { 146, 0 },
  { 146, 1 },
  { 146, 3 },

  { 147, 1 },

  { 148, 3 },

  { 150, 0 },
  { 150, 1 },
  { 150, 2 },
  { 149, 0 },
  { 149, 1 },
  { 149, 1 },
  { 149, 1 },
  { 148, 2 },
  { 148, 2 },
  { 148, 2 },
  { 152, 1 },
  { 152, 0 },
  { 148, 2 },
  { 148, 3 },
  { 148, 5 },
  { 148, 2 },
  { 153, 6 },
  { 155, 1 },
  { 157, 0 },
  { 157, 3 },
  { 156, 1 },
  { 156, 0 },
  { 154, 5 },
  { 154, 2 },
  { 161, 0 },
  { 161, 2 },
  { 159, 3 },
  { 159, 1 },
  { 163, 3 },
  { 164, 1 },
  { 167, 1 },
  { 167, 1 },
  { 168, 1 },
  { 151, 1 },
  { 151, 1 },
  { 151, 1 },
  { 165, 0 },
  { 165, 1 },
  { 169, 1 },
  { 169, 4 },
  { 169, 6 },
  { 170, 1 },
  { 170, 2 },
  { 171, 1 },
  { 171, 1 },
  { 166, 2 },
  { 166, 0 },
  { 174, 2 },
  { 174, 2 },
  { 174, 4 },
  { 174, 3 },
  { 174, 3 },
  { 174, 2 },
  { 174, 2 },
  { 174, 3 },
  { 174, 5 },
  { 174, 2 },
  { 174, 4 },
  { 174, 4 },
  { 174, 1 },
  { 174, 2 },
  { 179, 0 },
  { 179, 1 },
  { 181, 0 },
  { 181, 2 },
  { 183, 2 },
  { 183, 3 },
  { 183, 3 },
  { 183, 3 },
  { 184, 2 },
  { 184, 2 },
  { 184, 1 },
  { 184, 1 },
  { 184, 2 },
  { 182, 3 },
  { 182, 2 },
  { 185, 0 },
  { 185, 2 },
  { 185, 2 },
  { 160, 0 },
  { 160, 2 },
  { 186, 3 },
  { 186, 1 },
  { 187, 1 },
  { 187, 0 },
  { 188, 2 },
  { 188, 7 },
  { 188, 5 },
  { 188, 5 },
  { 188, 10 },
  { 190, 0 },
  { 190, 1 },
  { 177, 0 },
  { 177, 3 },
  { 191, 0 },
  { 191, 2 },
  { 192, 1 },
  { 192, 1 },
  { 192, 1 },
  { 148, 4 },
  { 194, 2 },
  { 194, 0 },
  { 148, 8 },
  { 148, 4 },
  { 148, 1 },

  { 162, 1 },
  { 162, 3 },
  { 197, 1 },
  { 197, 2 },
  { 197, 1 },
  { 196, 9 },
  { 198, 1 },


  { 198, 1 },

  { 198, 0 },
  { 206, 2 },
  { 206, 0 },
  { 199, 3 },
  { 199, 2 },
  { 199, 4 },
  { 207, 2 },
  { 207, 1 },
  { 207, 0 },
  { 200, 0 },
  { 200, 2 },
  { 209, 2 },
  { 209, 0 },
  { 208, 7 },
  { 208, 7 },
  { 208, 7 },
  { 158, 0 },
  { 158, 2 },
  { 195, 2 },
  { 210, 1 },
  { 210, 2 },
  { 210, 3 },
  { 210, 4 },
  { 212, 2 },
  { 212, 0 },
  { 211, 0 },
  { 211, 3 },
  { 211, 2 },
  { 213, 4 },
  { 213, 0 },
  { 204, 0 },
  { 204, 3 },
  { 216, 4 },
  { 216, 2 },
  { 178, 1 },
  { 178, 1 },
  { 178, 0 },
  { 202, 0 },
  { 202, 3 },
  { 203, 0 },
  { 203, 2 },
  { 205, 0 },
  { 205, 2 },
  { 205, 4 },
  { 205, 4 },
  { 148, 5 },
  { 201, 0 },
  { 201, 2 },
  { 148, 7 },
  { 218, 5 },
  { 218, 3 },
  { 148, 5 },
  { 148, 5 },
  { 148, 6 },
  { 219, 2 },
  { 219, 1 },
  { 221, 4 },
  { 221, 5 },
  { 220, 0 },
  { 220, 3 },
  { 215, 3 },
  { 215, 1 },
  { 176, 1 },
  { 176, 3 },
  { 175, 1 },
  { 176, 1 },
  { 176, 1 },
  { 176, 3 },
  { 176, 5 },
  { 175, 1 },
  { 175, 1 },
  { 176, 1 },
  { 176, 1 },
  { 176, 3 },
  { 176, 6 },
  { 176, 5 },
  { 176, 4 },
  { 175, 1 },
  { 176, 3 },
  { 176, 3 },
  { 176, 3 },
  { 176, 3 },
  { 176, 3 },
  { 176, 3 },
  { 176, 3 },
  { 176, 3 },
  { 223, 1 },
  { 223, 2 },
  { 223, 1 },
  { 223, 2 },
  { 176, 3 },
  { 176, 5 },
  { 176, 2 },
  { 176, 3 },
  { 176, 3 },
  { 176, 4 },
  { 176, 2 },
  { 176, 2 },
  { 176, 2 },
  { 176, 2 },
  { 224, 1 },
  { 224, 2 },
  { 176, 5 },
  { 225, 1 },
  { 225, 2 },
  { 176, 5 },
  { 176, 3 },
  { 176, 5 },
  { 176, 4 },
  { 176, 4 },
  { 176, 5 },
  { 227, 5 },
  { 227, 4 },
  { 228, 2 },
  { 228, 0 },
  { 226, 1 },
  { 226, 0 },
  { 222, 1 },
  { 222, 0 },
  { 217, 3 },
  { 217, 1 },
  { 148, 12 },
  { 229, 1 },
  { 229, 0 },
  { 180, 0 },
  { 180, 3 },
  { 189, 5 },
  { 189, 3 },
  { 230, 0 },
  { 230, 2 },
  { 148, 4 },
  { 148, 1 },
  { 148, 2 },
  { 148, 3 },
  { 148, 5 },
  { 148, 6 },
  { 148, 5 },
  { 148, 6 },
  { 231, 1 },
  { 231, 1 },
  { 231, 1 },
  { 231, 1 },
  { 231, 1 },
  { 172, 2 },
  { 172, 1 },
  { 173, 2 },
  { 232, 1 },
  { 148, 5 },
  { 233, 11 },
  { 235, 1 },
  { 235, 1 },
  { 235, 2 },
  { 235, 0 },
  { 236, 1 },
  { 236, 1 },
................................................................................
  { 240, 3 },
  { 241, 0 },
  { 241, 3 },
  { 241, 2 },
  { 239, 7 },
  { 239, 5 },
  { 239, 5 },
  { 239, 5 },
  { 239, 1 },
  { 176, 4 },
  { 176, 6 },
  { 193, 1 },
  { 193, 1 },
  { 193, 1 },
  { 148, 4 },
  { 148, 6 },
  { 148, 3 },
  { 243, 0 },
  { 243, 2 },
  { 242, 1 },
  { 242, 0 },
  { 148, 1 },
  { 148, 3 },
  { 148, 1 },
  { 148, 3 },
  { 148, 6 },
  { 148, 6 },
  { 244, 1 },
  { 245, 0 },
  { 245, 1 },
  { 148, 1 },
  { 148, 4 },
  { 246, 8 },
  { 247, 1 },
  { 247, 3 },
  { 248, 0 },
  { 248, 2 },
  { 249, 1 },
  { 249, 3 },
  { 250, 1 },
  { 251, 0 },
  { 251, 4 },
  { 251, 2 },





};

static void yy_accept(yyParser*);  /* Forward Declaration */

/*
** Perform a reduce action and the shift that must immediately
** follow the reduce.
................................................................................
      case 7: /* explain ::= EXPLAIN QUERY PLAN */
{ sqlite3BeginParse(pParse, 2); }
        break;
      case 8: /* cmdx ::= cmd */
{ sqlite3FinishCoding(pParse); }
        break;
      case 9: /* cmd ::= BEGIN transtype trans_opt */
{sqlite3BeginTransaction(pParse, yymsp[-1].minor.yy4);}
        break;
      case 13: /* transtype ::= */
{yygotominor.yy4 = TK_DEFERRED;}
        break;
      case 14: /* transtype ::= DEFERRED */
      case 15: /* transtype ::= IMMEDIATE */ yytestcase(yyruleno==15);
      case 16: /* transtype ::= EXCLUSIVE */ yytestcase(yyruleno==16);
      case 117: /* multiselect_op ::= UNION */ yytestcase(yyruleno==117);
      case 119: /* multiselect_op ::= EXCEPT|INTERSECT */ yytestcase(yyruleno==119);
{yygotominor.yy4 = yymsp[0].major;}
        break;
      case 17: /* cmd ::= COMMIT trans_opt */
      case 18: /* cmd ::= END trans_opt */ yytestcase(yyruleno==18);
{sqlite3CommitTransaction(pParse);}
        break;
      case 19: /* cmd ::= ROLLBACK trans_opt */
{sqlite3RollbackTransaction(pParse);}
................................................................................
      case 24: /* cmd ::= ROLLBACK trans_opt TO savepoint_opt nm */
{
  sqlite3Savepoint(pParse, SAVEPOINT_ROLLBACK, &yymsp[0].minor.yy0);
}
        break;
      case 26: /* create_table ::= createkw temp TABLE ifnotexists nm dbnm */
{
   sqlite3StartTable(pParse,&yymsp[-1].minor.yy0,&yymsp[0].minor.yy0,yymsp[-4].minor.yy4,0,0,yymsp[-2].minor.yy4);
}
        break;
      case 27: /* createkw ::= CREATE */
{
  pParse->db->lookaside.bEnabled = 0;
  yygotominor.yy0 = yymsp[0].minor.yy0;
}
        break;
      case 28: /* ifnotexists ::= */
      case 31: /* temp ::= */ yytestcase(yyruleno==31);
      case 71: /* autoinc ::= */ yytestcase(yyruleno==71);
      case 84: /* defer_subclause ::= NOT DEFERRABLE init_deferred_pred_opt */ yytestcase(yyruleno==84);
      case 86: /* init_deferred_pred_opt ::= */ yytestcase(yyruleno==86);
      case 88: /* init_deferred_pred_opt ::= INITIALLY IMMEDIATE */ yytestcase(yyruleno==88);
      case 100: /* defer_subclause_opt ::= */ yytestcase(yyruleno==100);
      case 111: /* ifexists ::= */ yytestcase(yyruleno==111);
      case 223: /* between_op ::= BETWEEN */ yytestcase(yyruleno==223);
      case 226: /* in_op ::= IN */ yytestcase(yyruleno==226);
{yygotominor.yy4 = 0;}
        break;
      case 29: /* ifnotexists ::= IF NOT EXISTS */
      case 30: /* temp ::= TEMP */ yytestcase(yyruleno==30);
      case 72: /* autoinc ::= AUTOINCR */ yytestcase(yyruleno==72);
      case 87: /* init_deferred_pred_opt ::= INITIALLY DEFERRED */ yytestcase(yyruleno==87);
      case 110: /* ifexists ::= IF EXISTS */ yytestcase(yyruleno==110);
      case 224: /* between_op ::= NOT BETWEEN */ yytestcase(yyruleno==224);
      case 227: /* in_op ::= NOT IN */ yytestcase(yyruleno==227);
{yygotominor.yy4 = 1;}
        break;
      case 32: /* create_table_args ::= LP columnlist conslist_opt RP table_options */
{
  sqlite3EndTable(pParse,&yymsp[-2].minor.yy0,&yymsp[-1].minor.yy0,yymsp[0].minor.yy210,0);
}
        break;
      case 33: /* create_table_args ::= AS select */
{
  sqlite3EndTable(pParse,0,0,0,yymsp[0].minor.yy387);
  sqlite3SelectDelete(pParse->db, yymsp[0].minor.yy387);
}
        break;
      case 34: /* table_options ::= */
{yygotominor.yy210 = 0;}
        break;
      case 35: /* table_options ::= WITHOUT nm */
{
  if( yymsp[0].minor.yy0.n==5 && sqlite3_strnicmp(yymsp[0].minor.yy0.z,"rowid",5)==0 ){
    yygotominor.yy210 = TF_WithoutRowid;
  }else{
    yygotominor.yy210 = 0;
    sqlite3ErrorMsg(pParse, "unknown table option: %.*s", yymsp[0].minor.yy0.n, yymsp[0].minor.yy0.z);
  }
}
        break;
      case 38: /* column ::= columnid type carglist */
{
  yygotominor.yy0.z = yymsp[-2].minor.yy0.z;
................................................................................
      case 39: /* columnid ::= nm */
{
  sqlite3AddColumn(pParse,&yymsp[0].minor.yy0);
  yygotominor.yy0 = yymsp[0].minor.yy0;
  pParse->constraintName.n = 0;
}
        break;
      case 40: /* id ::= ID */
      case 41: /* id ::= INDEXED */ yytestcase(yyruleno==41);
      case 42: /* ids ::= ID|STRING */ yytestcase(yyruleno==42);
      case 43: /* nm ::= id */ yytestcase(yyruleno==43);
      case 44: /* nm ::= STRING */ yytestcase(yyruleno==44);
      case 45: /* nm ::= JOIN_KW */ yytestcase(yyruleno==45);
      case 48: /* typetoken ::= typename */ yytestcase(yyruleno==48);
      case 51: /* typename ::= ids */ yytestcase(yyruleno==51);

      case 129: /* as ::= AS nm */ yytestcase(yyruleno==129);
      case 130: /* as ::= ids */ yytestcase(yyruleno==130);
      case 140: /* dbnm ::= DOT nm */ yytestcase(yyruleno==140);
      case 149: /* indexed_opt ::= INDEXED BY nm */ yytestcase(yyruleno==149);
      case 252: /* collate ::= COLLATE ids */ yytestcase(yyruleno==252);
      case 261: /* nmnum ::= plus_num */ yytestcase(yyruleno==261);
      case 262: /* nmnum ::= nm */ yytestcase(yyruleno==262);
      case 263: /* nmnum ::= ON */ yytestcase(yyruleno==263);
      case 264: /* nmnum ::= DELETE */ yytestcase(yyruleno==264);
      case 265: /* nmnum ::= DEFAULT */ yytestcase(yyruleno==265);
      case 266: /* plus_num ::= PLUS number */ yytestcase(yyruleno==266);
      case 267: /* plus_num ::= number */ yytestcase(yyruleno==267);
      case 268: /* minus_num ::= MINUS number */ yytestcase(yyruleno==268);

      case 269: /* number ::= INTEGER|FLOAT */ yytestcase(yyruleno==269);

      case 285: /* trnm ::= nm */ yytestcase(yyruleno==285);
{yygotominor.yy0 = yymsp[0].minor.yy0;}
        break;
      case 47: /* type ::= typetoken */
{sqlite3AddColumnType(pParse,&yymsp[0].minor.yy0);}
        break;
      case 49: /* typetoken ::= typename LP signed RP */
{
  yygotominor.yy0.z = yymsp[-3].minor.yy0.z;
  yygotominor.yy0.n = (int)(&yymsp[0].minor.yy0.z[yymsp[0].minor.yy0.n] - yymsp[-3].minor.yy0.z);
}
        break;
      case 50: /* typetoken ::= typename LP signed COMMA signed RP */
{
  yygotominor.yy0.z = yymsp[-5].minor.yy0.z;
  yygotominor.yy0.n = (int)(&yymsp[0].minor.yy0.z[yymsp[0].minor.yy0.n] - yymsp[-5].minor.yy0.z);
}
        break;
      case 52: /* typename ::= typename ids */
{yygotominor.yy0.z=yymsp[-1].minor.yy0.z; yygotominor.yy0.n=yymsp[0].minor.yy0.n+(int)(yymsp[0].minor.yy0.z-yymsp[-1].minor.yy0.z);}
        break;
      case 57: /* ccons ::= CONSTRAINT nm */
      case 95: /* tcons ::= CONSTRAINT nm */ yytestcase(yyruleno==95);
{pParse->constraintName = yymsp[0].minor.yy0;}
        break;
      case 58: /* ccons ::= DEFAULT term */
      case 60: /* ccons ::= DEFAULT PLUS term */ yytestcase(yyruleno==60);
{sqlite3AddDefaultValue(pParse,&yymsp[0].minor.yy118);}
        break;
      case 59: /* ccons ::= DEFAULT LP expr RP */
{sqlite3AddDefaultValue(pParse,&yymsp[-1].minor.yy118);}
        break;
      case 61: /* ccons ::= DEFAULT MINUS term */
{
  ExprSpan v;
  v.pExpr = sqlite3PExpr(pParse, TK_UMINUS, yymsp[0].minor.yy118.pExpr, 0, 0);
  v.zStart = yymsp[-1].minor.yy0.z;
  v.zEnd = yymsp[0].minor.yy118.zEnd;
  sqlite3AddDefaultValue(pParse,&v);
}
        break;
      case 62: /* ccons ::= DEFAULT id */
{
  ExprSpan v;
  spanExpr(&v, pParse, TK_STRING, &yymsp[0].minor.yy0);
  sqlite3AddDefaultValue(pParse,&v);
}
        break;
      case 64: /* ccons ::= NOT NULL onconf */
{sqlite3AddNotNull(pParse, yymsp[0].minor.yy4);}
        break;
      case 65: /* ccons ::= PRIMARY KEY sortorder onconf autoinc */
{sqlite3AddPrimaryKey(pParse,0,yymsp[-1].minor.yy4,yymsp[0].minor.yy4,yymsp[-2].minor.yy4);}
        break;
      case 66: /* ccons ::= UNIQUE onconf */
{sqlite3CreateIndex(pParse,0,0,0,0,yymsp[0].minor.yy4,0,0,0,0);}
        break;
      case 67: /* ccons ::= CHECK LP expr RP */
{sqlite3AddCheckConstraint(pParse,yymsp[-1].minor.yy118.pExpr);}
        break;
      case 68: /* ccons ::= REFERENCES nm idxlist_opt refargs */
{sqlite3CreateForeignKey(pParse,0,&yymsp[-2].minor.yy0,yymsp[-1].minor.yy322,yymsp[0].minor.yy4);}
        break;
      case 69: /* ccons ::= defer_subclause */
{sqlite3DeferForeignKey(pParse,yymsp[0].minor.yy4);}
        break;
      case 70: /* ccons ::= COLLATE ids */
{sqlite3AddCollateType(pParse, &yymsp[0].minor.yy0);}
        break;
      case 73: /* refargs ::= */
{ yygotominor.yy4 = OE_None*0x0101; /* EV: R-19803-45884 */}
        break;
      case 74: /* refargs ::= refargs refarg */
{ yygotominor.yy4 = (yymsp[-1].minor.yy4 & ~yymsp[0].minor.yy215.mask) | yymsp[0].minor.yy215.value; }
        break;
      case 75: /* refarg ::= MATCH nm */
      case 76: /* refarg ::= ON INSERT refact */ yytestcase(yyruleno==76);
{ yygotominor.yy215.value = 0;     yygotominor.yy215.mask = 0x000000; }
        break;
      case 77: /* refarg ::= ON DELETE refact */
{ yygotominor.yy215.value = yymsp[0].minor.yy4;     yygotominor.yy215.mask = 0x0000ff; }
        break;
      case 78: /* refarg ::= ON UPDATE refact */
{ yygotominor.yy215.value = yymsp[0].minor.yy4<<8;  yygotominor.yy215.mask = 0x00ff00; }
        break;
      case 79: /* refact ::= SET NULL */
{ yygotominor.yy4 = OE_SetNull;  /* EV: R-33326-45252 */}
        break;
      case 80: /* refact ::= SET DEFAULT */
{ yygotominor.yy4 = OE_SetDflt;  /* EV: R-33326-45252 */}
        break;
      case 81: /* refact ::= CASCADE */
{ yygotominor.yy4 = OE_Cascade;  /* EV: R-33326-45252 */}
        break;
      case 82: /* refact ::= RESTRICT */
{ yygotominor.yy4 = OE_Restrict; /* EV: R-33326-45252 */}
        break;
      case 83: /* refact ::= NO ACTION */
{ yygotominor.yy4 = OE_None;     /* EV: R-33326-45252 */}
        break;
      case 85: /* defer_subclause ::= DEFERRABLE init_deferred_pred_opt */
      case 101: /* defer_subclause_opt ::= defer_subclause */ yytestcase(yyruleno==101);
      case 103: /* onconf ::= ON CONFLICT resolvetype */ yytestcase(yyruleno==103);
      case 106: /* resolvetype ::= raisetype */ yytestcase(yyruleno==106);
{yygotominor.yy4 = yymsp[0].minor.yy4;}
        break;
      case 89: /* conslist_opt ::= */
{yygotominor.yy0.n = 0; yygotominor.yy0.z = 0;}
        break;
      case 90: /* conslist_opt ::= COMMA conslist */
{yygotominor.yy0 = yymsp[-1].minor.yy0;}
        break;
      case 93: /* tconscomma ::= COMMA */
{pParse->constraintName.n = 0;}
        break;
      case 96: /* tcons ::= PRIMARY KEY LP idxlist autoinc RP onconf */
{sqlite3AddPrimaryKey(pParse,yymsp[-3].minor.yy322,yymsp[0].minor.yy4,yymsp[-2].minor.yy4,0);}
        break;
      case 97: /* tcons ::= UNIQUE LP idxlist RP onconf */
{sqlite3CreateIndex(pParse,0,0,0,yymsp[-2].minor.yy322,yymsp[0].minor.yy4,0,0,0,0);}
        break;
      case 98: /* tcons ::= CHECK LP expr RP onconf */
{sqlite3AddCheckConstraint(pParse,yymsp[-2].minor.yy118.pExpr);}
        break;
      case 99: /* tcons ::= FOREIGN KEY LP idxlist RP REFERENCES nm idxlist_opt refargs defer_subclause_opt */
{
    sqlite3CreateForeignKey(pParse, yymsp[-6].minor.yy322, &yymsp[-3].minor.yy0, yymsp[-2].minor.yy322, yymsp[-1].minor.yy4);
    sqlite3DeferForeignKey(pParse, yymsp[0].minor.yy4);
}
        break;
      case 102: /* onconf ::= */
{yygotominor.yy4 = OE_Default;}
        break;
      case 104: /* orconf ::= */
{yygotominor.yy210 = OE_Default;}
        break;
      case 105: /* orconf ::= OR resolvetype */
{yygotominor.yy210 = (u8)yymsp[0].minor.yy4;}
        break;
      case 107: /* resolvetype ::= IGNORE */
{yygotominor.yy4 = OE_Ignore;}
        break;
      case 108: /* resolvetype ::= REPLACE */
{yygotominor.yy4 = OE_Replace;}
        break;
      case 109: /* cmd ::= DROP TABLE ifexists fullname */
{
  sqlite3DropTable(pParse, yymsp[0].minor.yy259, 0, yymsp[-1].minor.yy4);
}
        break;
      case 112: /* cmd ::= createkw temp VIEW ifnotexists nm dbnm AS select */
{
  sqlite3CreateView(pParse, &yymsp[-7].minor.yy0, &yymsp[-3].minor.yy0, &yymsp[-2].minor.yy0, yymsp[0].minor.yy387, yymsp[-6].minor.yy4, yymsp[-4].minor.yy4);
}
        break;
      case 113: /* cmd ::= DROP VIEW ifexists fullname */
{
  sqlite3DropTable(pParse, yymsp[0].minor.yy259, 1, yymsp[-1].minor.yy4);
}
        break;
      case 114: /* cmd ::= select */
{
  SelectDest dest = {SRT_Output, 0, 0, 0, 0};
  sqlite3Select(pParse, yymsp[0].minor.yy387, &dest);
  sqlite3ExplainBegin(pParse->pVdbe);
  sqlite3ExplainSelect(pParse->pVdbe, yymsp[0].minor.yy387);
  sqlite3ExplainFinish(pParse->pVdbe);
  sqlite3SelectDelete(pParse->db, yymsp[0].minor.yy387);
}
        break;
      case 115: /* select ::= oneselect */

{yygotominor.yy387 = yymsp[0].minor.yy387;}






        break;




      case 116: /* select ::= select multiselect_op oneselect */
{
  if( yymsp[0].minor.yy387 ){
    yymsp[0].minor.yy387->op = (u8)yymsp[-1].minor.yy4;
    yymsp[0].minor.yy387->pPrior = yymsp[-2].minor.yy387;
    if( yymsp[-1].minor.yy4!=TK_ALL ) pParse->hasCompound = 1;
  }else{
    sqlite3SelectDelete(pParse->db, yymsp[-2].minor.yy387);
  }
  yygotominor.yy387 = yymsp[0].minor.yy387;
}
        break;
      case 118: /* multiselect_op ::= UNION ALL */
{yygotominor.yy4 = TK_ALL;}
        break;
      case 120: /* oneselect ::= SELECT distinct selcollist from where_opt groupby_opt having_opt orderby_opt limit_opt */
{
  yygotominor.yy387 = sqlite3SelectNew(pParse,yymsp[-6].minor.yy322,yymsp[-5].minor.yy259,yymsp[-4].minor.yy314,yymsp[-3].minor.yy322,yymsp[-2].minor.yy314,yymsp[-1].minor.yy322,yymsp[-7].minor.yy177,yymsp[0].minor.yy292.pLimit,yymsp[0].minor.yy292.pOffset);

}
        break;

















      case 121: /* distinct ::= DISTINCT */
{yygotominor.yy177 = SF_Distinct;}
        break;
      case 122: /* distinct ::= ALL */
      case 123: /* distinct ::= */ yytestcase(yyruleno==123);
{yygotominor.yy177 = 0;}
        break;
      case 124: /* sclp ::= selcollist COMMA */
      case 248: /* idxlist_opt ::= LP idxlist RP */ yytestcase(yyruleno==248);
{yygotominor.yy322 = yymsp[-1].minor.yy322;}
        break;
      case 125: /* sclp ::= */
      case 153: /* orderby_opt ::= */ yytestcase(yyruleno==153);
      case 160: /* groupby_opt ::= */ yytestcase(yyruleno==160);
      case 241: /* exprlist ::= */ yytestcase(yyruleno==241);
      case 247: /* idxlist_opt ::= */ yytestcase(yyruleno==247);
{yygotominor.yy322 = 0;}
        break;
      case 126: /* selcollist ::= sclp expr as */
{
   yygotominor.yy322 = sqlite3ExprListAppend(pParse, yymsp[-2].minor.yy322, yymsp[-1].minor.yy118.pExpr);
   if( yymsp[0].minor.yy0.n>0 ) sqlite3ExprListSetName(pParse, yygotominor.yy322, &yymsp[0].minor.yy0, 1);
   sqlite3ExprListSetSpan(pParse,yygotominor.yy322,&yymsp[-1].minor.yy118);
}
        break;
      case 127: /* selcollist ::= sclp STAR */
{
  Expr *p = sqlite3Expr(pParse->db, TK_ALL, 0);
  yygotominor.yy322 = sqlite3ExprListAppend(pParse, yymsp[-1].minor.yy322, p);
}
        break;
      case 128: /* selcollist ::= sclp nm DOT STAR */
{
  Expr *pRight = sqlite3PExpr(pParse, TK_ALL, 0, 0, &yymsp[0].minor.yy0);
  Expr *pLeft = sqlite3PExpr(pParse, TK_ID, 0, 0, &yymsp[-2].minor.yy0);
  Expr *pDot = sqlite3PExpr(pParse, TK_DOT, pLeft, pRight, 0);
  yygotominor.yy322 = sqlite3ExprListAppend(pParse,yymsp[-3].minor.yy322, pDot);
}
        break;
      case 131: /* as ::= */
{yygotominor.yy0.n = 0;}
        break;
      case 132: /* from ::= */
{yygotominor.yy259 = sqlite3DbMallocZero(pParse->db, sizeof(*yygotominor.yy259));}
        break;
      case 133: /* from ::= FROM seltablist */
{
  yygotominor.yy259 = yymsp[0].minor.yy259;
  sqlite3SrcListShiftJoinType(yygotominor.yy259);
}
        break;
      case 134: /* stl_prefix ::= seltablist joinop */
{
   yygotominor.yy259 = yymsp[-1].minor.yy259;
   if( ALWAYS(yygotominor.yy259 && yygotominor.yy259->nSrc>0) ) yygotominor.yy259->a[yygotominor.yy259->nSrc-1].jointype = (u8)yymsp[0].minor.yy4;
}
        break;
      case 135: /* stl_prefix ::= */
{yygotominor.yy259 = 0;}
        break;
      case 136: /* seltablist ::= stl_prefix nm dbnm as indexed_opt on_opt using_opt */
{
  yygotominor.yy259 = sqlite3SrcListAppendFromTerm(pParse,yymsp[-6].minor.yy259,&yymsp[-5].minor.yy0,&yymsp[-4].minor.yy0,&yymsp[-3].minor.yy0,0,yymsp[-1].minor.yy314,yymsp[0].minor.yy384);
  sqlite3SrcListIndexedBy(pParse, yygotominor.yy259, &yymsp[-2].minor.yy0);
}
        break;
      case 137: /* seltablist ::= stl_prefix LP select RP as on_opt using_opt */
{
    yygotominor.yy259 = sqlite3SrcListAppendFromTerm(pParse,yymsp[-6].minor.yy259,0,0,&yymsp[-2].minor.yy0,yymsp[-4].minor.yy387,yymsp[-1].minor.yy314,yymsp[0].minor.yy384);
  }
        break;
      case 138: /* seltablist ::= stl_prefix LP seltablist RP as on_opt using_opt */
{
    if( yymsp[-6].minor.yy259==0 && yymsp[-2].minor.yy0.n==0 && yymsp[-1].minor.yy314==0 && yymsp[0].minor.yy384==0 ){
      yygotominor.yy259 = yymsp[-4].minor.yy259;
    }else if( yymsp[-4].minor.yy259->nSrc==1 ){
      yygotominor.yy259 = sqlite3SrcListAppendFromTerm(pParse,yymsp[-6].minor.yy259,0,0,&yymsp[-2].minor.yy0,0,yymsp[-1].minor.yy314,yymsp[0].minor.yy384);
      if( yygotominor.yy259 ){
        struct SrcList_item *pNew = &yygotominor.yy259->a[yygotominor.yy259->nSrc-1];
        struct SrcList_item *pOld = yymsp[-4].minor.yy259->a;
        pNew->zName = pOld->zName;
        pNew->zDatabase = pOld->zDatabase;
        pNew->pSelect = pOld->pSelect;
        pOld->zName = pOld->zDatabase = 0;
        pOld->pSelect = 0;
      }
      sqlite3SrcListDelete(pParse->db, yymsp[-4].minor.yy259);
    }else{
      Select *pSubquery;
      sqlite3SrcListShiftJoinType(yymsp[-4].minor.yy259);
      pSubquery = sqlite3SelectNew(pParse,0,yymsp[-4].minor.yy259,0,0,0,0,SF_NestedFrom,0,0);
      yygotominor.yy259 = sqlite3SrcListAppendFromTerm(pParse,yymsp[-6].minor.yy259,0,0,&yymsp[-2].minor.yy0,pSubquery,yymsp[-1].minor.yy314,yymsp[0].minor.yy384);
    }
  }
        break;
      case 139: /* dbnm ::= */
      case 148: /* indexed_opt ::= */ yytestcase(yyruleno==148);
{yygotominor.yy0.z=0; yygotominor.yy0.n=0;}
        break;
      case 141: /* fullname ::= nm dbnm */
{yygotominor.yy259 = sqlite3SrcListAppend(pParse->db,0,&yymsp[-1].minor.yy0,&yymsp[0].minor.yy0);}
        break;
      case 142: /* joinop ::= COMMA|JOIN */
{ yygotominor.yy4 = JT_INNER; }
        break;
      case 143: /* joinop ::= JOIN_KW JOIN */
{ yygotominor.yy4 = sqlite3JoinType(pParse,&yymsp[-1].minor.yy0,0,0); }
        break;
      case 144: /* joinop ::= JOIN_KW nm JOIN */
{ yygotominor.yy4 = sqlite3JoinType(pParse,&yymsp[-2].minor.yy0,&yymsp[-1].minor.yy0,0); }
        break;
      case 145: /* joinop ::= JOIN_KW nm nm JOIN */
{ yygotominor.yy4 = sqlite3JoinType(pParse,&yymsp[-3].minor.yy0,&yymsp[-2].minor.yy0,&yymsp[-1].minor.yy0); }
        break;
      case 146: /* on_opt ::= ON expr */
      case 163: /* having_opt ::= HAVING expr */ yytestcase(yyruleno==163);
      case 170: /* where_opt ::= WHERE expr */ yytestcase(yyruleno==170);
      case 236: /* case_else ::= ELSE expr */ yytestcase(yyruleno==236);
      case 238: /* case_operand ::= expr */ yytestcase(yyruleno==238);
{yygotominor.yy314 = yymsp[0].minor.yy118.pExpr;}
        break;
      case 147: /* on_opt ::= */
      case 162: /* having_opt ::= */ yytestcase(yyruleno==162);
      case 169: /* where_opt ::= */ yytestcase(yyruleno==169);
      case 237: /* case_else ::= */ yytestcase(yyruleno==237);
      case 239: /* case_operand ::= */ yytestcase(yyruleno==239);
{yygotominor.yy314 = 0;}
        break;
      case 150: /* indexed_opt ::= NOT INDEXED */
{yygotominor.yy0.z=0; yygotominor.yy0.n=1;}
        break;
      case 151: /* using_opt ::= USING LP idlist RP */
      case 182: /* inscollist_opt ::= LP idlist RP */ yytestcase(yyruleno==182);
{yygotominor.yy384 = yymsp[-1].minor.yy384;}
        break;
      case 152: /* using_opt ::= */
      case 181: /* inscollist_opt ::= */ yytestcase(yyruleno==181);
{yygotominor.yy384 = 0;}
        break;
      case 154: /* orderby_opt ::= ORDER BY sortlist */
      case 161: /* groupby_opt ::= GROUP BY nexprlist */ yytestcase(yyruleno==161);
      case 240: /* exprlist ::= nexprlist */ yytestcase(yyruleno==240);
{yygotominor.yy322 = yymsp[0].minor.yy322;}
        break;
      case 155: /* sortlist ::= sortlist COMMA expr sortorder */
{
  yygotominor.yy322 = sqlite3ExprListAppend(pParse,yymsp[-3].minor.yy322,yymsp[-1].minor.yy118.pExpr);
  if( yygotominor.yy322 ) yygotominor.yy322->a[yygotominor.yy322->nExpr-1].sortOrder = (u8)yymsp[0].minor.yy4;
}
        break;
      case 156: /* sortlist ::= expr sortorder */
{
  yygotominor.yy322 = sqlite3ExprListAppend(pParse,0,yymsp[-1].minor.yy118.pExpr);
  if( yygotominor.yy322 && ALWAYS(yygotominor.yy322->a) ) yygotominor.yy322->a[0].sortOrder = (u8)yymsp[0].minor.yy4;
}
        break;
      case 157: /* sortorder ::= ASC */
      case 159: /* sortorder ::= */ yytestcase(yyruleno==159);
{yygotominor.yy4 = SQLITE_SO_ASC;}
        break;
      case 158: /* sortorder ::= DESC */
{yygotominor.yy4 = SQLITE_SO_DESC;}
        break;
      case 164: /* limit_opt ::= */
{yygotominor.yy292.pLimit = 0; yygotominor.yy292.pOffset = 0;}
        break;
      case 165: /* limit_opt ::= LIMIT expr */
{yygotominor.yy292.pLimit = yymsp[0].minor.yy118.pExpr; yygotominor.yy292.pOffset = 0;}
        break;
      case 166: /* limit_opt ::= LIMIT expr OFFSET expr */
{yygotominor.yy292.pLimit = yymsp[-2].minor.yy118.pExpr; yygotominor.yy292.pOffset = yymsp[0].minor.yy118.pExpr;}
        break;
      case 167: /* limit_opt ::= LIMIT expr COMMA expr */
{yygotominor.yy292.pOffset = yymsp[-2].minor.yy118.pExpr; yygotominor.yy292.pLimit = yymsp[0].minor.yy118.pExpr;}
        break;
      case 168: /* cmd ::= DELETE FROM fullname indexed_opt where_opt */
{
  sqlite3SrcListIndexedBy(pParse, yymsp[-2].minor.yy259, &yymsp[-1].minor.yy0);
  sqlite3DeleteFrom(pParse,yymsp[-2].minor.yy259,yymsp[0].minor.yy314);
}
        break;
      case 171: /* cmd ::= UPDATE orconf fullname indexed_opt SET setlist where_opt */
{
  sqlite3SrcListIndexedBy(pParse, yymsp[-4].minor.yy259, &yymsp[-3].minor.yy0);
  sqlite3ExprListCheckLength(pParse,yymsp[-1].minor.yy322,"set list"); 
  sqlite3Update(pParse,yymsp[-4].minor.yy259,yymsp[-1].minor.yy322,yymsp[0].minor.yy314,yymsp[-5].minor.yy210);
}
        break;
      case 172: /* setlist ::= setlist COMMA nm EQ expr */
{
  yygotominor.yy322 = sqlite3ExprListAppend(pParse, yymsp[-4].minor.yy322, yymsp[0].minor.yy118.pExpr);
  sqlite3ExprListSetName(pParse, yygotominor.yy322, &yymsp[-2].minor.yy0, 1);
}
        break;
      case 173: /* setlist ::= nm EQ expr */
{
  yygotominor.yy322 = sqlite3ExprListAppend(pParse, 0, yymsp[0].minor.yy118.pExpr);
  sqlite3ExprListSetName(pParse, yygotominor.yy322, &yymsp[-2].minor.yy0, 1);
}
        break;
      case 174: /* cmd ::= insert_cmd INTO fullname inscollist_opt valuelist */
{sqlite3Insert(pParse, yymsp[-2].minor.yy259, yymsp[0].minor.yy260.pList, yymsp[0].minor.yy260.pSelect, yymsp[-1].minor.yy384, yymsp[-4].minor.yy210);}
        break;
      case 175: /* cmd ::= insert_cmd INTO fullname inscollist_opt select */
{sqlite3Insert(pParse, yymsp[-2].minor.yy259, 0, yymsp[0].minor.yy387, yymsp[-1].minor.yy384, yymsp[-4].minor.yy210);}
        break;
      case 176: /* cmd ::= insert_cmd INTO fullname inscollist_opt DEFAULT VALUES */
{sqlite3Insert(pParse, yymsp[-3].minor.yy259, 0, 0, yymsp[-2].minor.yy384, yymsp[-5].minor.yy210);}
        break;
      case 177: /* insert_cmd ::= INSERT orconf */
{yygotominor.yy210 = yymsp[0].minor.yy210;}
        break;
      case 178: /* insert_cmd ::= REPLACE */
{yygotominor.yy210 = OE_Replace;}
        break;
      case 179: /* valuelist ::= VALUES LP nexprlist RP */
{
  yygotominor.yy260.pList = yymsp[-1].minor.yy322;
  yygotominor.yy260.pSelect = 0;
}
        break;
      case 180: /* valuelist ::= valuelist COMMA LP exprlist RP */
{
  Select *pRight = sqlite3SelectNew(pParse, yymsp[-1].minor.yy322, 0, 0, 0, 0, 0, 0, 0, 0);
  if( yymsp[-4].minor.yy260.pList ){
    yymsp[-4].minor.yy260.pSelect = sqlite3SelectNew(pParse, yymsp[-4].minor.yy260.pList, 0, 0, 0, 0, 0, 0, 0, 0);
    yymsp[-4].minor.yy260.pList = 0;
  }
  yygotominor.yy260.pList = 0;
  if( yymsp[-4].minor.yy260.pSelect==0 || pRight==0 ){
    sqlite3SelectDelete(pParse->db, pRight);
    sqlite3SelectDelete(pParse->db, yymsp[-4].minor.yy260.pSelect);
    yygotominor.yy260.pSelect = 0;
  }else{
    pRight->op = TK_ALL;
    pRight->pPrior = yymsp[-4].minor.yy260.pSelect;
    pRight->selFlags |= SF_Values;
    pRight->pPrior->selFlags |= SF_Values;
    yygotominor.yy260.pSelect = pRight;
  }
}
        break;
      case 183: /* idlist ::= idlist COMMA nm */
{yygotominor.yy384 = sqlite3IdListAppend(pParse->db,yymsp[-2].minor.yy384,&yymsp[0].minor.yy0);}
        break;
      case 184: /* idlist ::= nm */
{yygotominor.yy384 = sqlite3IdListAppend(pParse->db,0,&yymsp[0].minor.yy0);}
        break;
      case 185: /* expr ::= term */
{yygotominor.yy118 = yymsp[0].minor.yy118;}
        break;
      case 186: /* expr ::= LP expr RP */
{yygotominor.yy118.pExpr = yymsp[-1].minor.yy118.pExpr; spanSet(&yygotominor.yy118,&yymsp[-2].minor.yy0,&yymsp[0].minor.yy0);}
        break;
      case 187: /* term ::= NULL */
      case 192: /* term ::= INTEGER|FLOAT|BLOB */ yytestcase(yyruleno==192);
      case 193: /* term ::= STRING */ yytestcase(yyruleno==193);
{spanExpr(&yygotominor.yy118, pParse, yymsp[0].major, &yymsp[0].minor.yy0);}
        break;
      case 188: /* expr ::= id */
      case 189: /* expr ::= JOIN_KW */ yytestcase(yyruleno==189);
{spanExpr(&yygotominor.yy118, pParse, TK_ID, &yymsp[0].minor.yy0);}
        break;
      case 190: /* expr ::= nm DOT nm */
{
  Expr *temp1 = sqlite3PExpr(pParse, TK_ID, 0, 0, &yymsp[-2].minor.yy0);
  Expr *temp2 = sqlite3PExpr(pParse, TK_ID, 0, 0, &yymsp[0].minor.yy0);
  yygotominor.yy118.pExpr = sqlite3PExpr(pParse, TK_DOT, temp1, temp2, 0);
  spanSet(&yygotominor.yy118,&yymsp[-2].minor.yy0,&yymsp[0].minor.yy0);
}
        break;
      case 191: /* expr ::= nm DOT nm DOT nm */
{
  Expr *temp1 = sqlite3PExpr(pParse, TK_ID, 0, 0, &yymsp[-4].minor.yy0);
  Expr *temp2 = sqlite3PExpr(pParse, TK_ID, 0, 0, &yymsp[-2].minor.yy0);
  Expr *temp3 = sqlite3PExpr(pParse, TK_ID, 0, 0, &yymsp[0].minor.yy0);
  Expr *temp4 = sqlite3PExpr(pParse, TK_DOT, temp2, temp3, 0);
  yygotominor.yy118.pExpr = sqlite3PExpr(pParse, TK_DOT, temp1, temp4, 0);
  spanSet(&yygotominor.yy118,&yymsp[-4].minor.yy0,&yymsp[0].minor.yy0);
}
        break;
      case 194: /* expr ::= REGISTER */
{
  /* When doing a nested parse, one can include terms in an expression
  ** that look like this:   #1 #2 ...  These terms refer to registers
  ** in the virtual machine.  #N is the N-th register. */
  if( pParse->nested==0 ){
    sqlite3ErrorMsg(pParse, "near \"%T\": syntax error", &yymsp[0].minor.yy0);
    yygotominor.yy118.pExpr = 0;
  }else{
    yygotominor.yy118.pExpr = sqlite3PExpr(pParse, TK_REGISTER, 0, 0, &yymsp[0].minor.yy0);
    if( yygotominor.yy118.pExpr ) sqlite3GetInt32(&yymsp[0].minor.yy0.z[1], &yygotominor.yy118.pExpr->iTable);
  }
  spanSet(&yygotominor.yy118, &yymsp[0].minor.yy0, &yymsp[0].minor.yy0);
}
        break;
      case 195: /* expr ::= VARIABLE */
{
  spanExpr(&yygotominor.yy118, pParse, TK_VARIABLE, &yymsp[0].minor.yy0);
  sqlite3ExprAssignVarNumber(pParse, yygotominor.yy118.pExpr);
  spanSet(&yygotominor.yy118, &yymsp[0].minor.yy0, &yymsp[0].minor.yy0);
}
        break;
      case 196: /* expr ::= expr COLLATE ids */
{
  yygotominor.yy118.pExpr = sqlite3ExprAddCollateToken(pParse, yymsp[-2].minor.yy118.pExpr, &yymsp[0].minor.yy0);
  yygotominor.yy118.zStart = yymsp[-2].minor.yy118.zStart;
  yygotominor.yy118.zEnd = &yymsp[0].minor.yy0.z[yymsp[0].minor.yy0.n];
}
        break;
      case 197: /* expr ::= CAST LP expr AS typetoken RP */
{
  yygotominor.yy118.pExpr = sqlite3PExpr(pParse, TK_CAST, yymsp[-3].minor.yy118.pExpr, 0, &yymsp[-1].minor.yy0);
  spanSet(&yygotominor.yy118,&yymsp[-5].minor.yy0,&yymsp[0].minor.yy0);
}
        break;
      case 198: /* expr ::= ID LP distinct exprlist RP */
{
  if( yymsp[-1].minor.yy322 && yymsp[-1].minor.yy322->nExpr>pParse->db->aLimit[SQLITE_LIMIT_FUNCTION_ARG] ){
    sqlite3ErrorMsg(pParse, "too many arguments on function %T", &yymsp[-4].minor.yy0);
  }
  yygotominor.yy118.pExpr = sqlite3ExprFunction(pParse, yymsp[-1].minor.yy322, &yymsp[-4].minor.yy0);
  spanSet(&yygotominor.yy118,&yymsp[-4].minor.yy0,&yymsp[0].minor.yy0);
  if( yymsp[-2].minor.yy177 && yygotominor.yy118.pExpr ){
    yygotominor.yy118.pExpr->flags |= EP_Distinct;
  }
}
        break;
      case 199: /* expr ::= ID LP STAR RP */
{
  yygotominor.yy118.pExpr = sqlite3ExprFunction(pParse, 0, &yymsp[-3].minor.yy0);
  spanSet(&yygotominor.yy118,&yymsp[-3].minor.yy0,&yymsp[0].minor.yy0);
}
        break;
      case 200: /* term ::= CTIME_KW */
{
  yygotominor.yy118.pExpr = sqlite3ExprFunction(pParse, 0, &yymsp[0].minor.yy0);
  spanSet(&yygotominor.yy118, &yymsp[0].minor.yy0, &yymsp[0].minor.yy0);
}
        break;
      case 201: /* expr ::= expr AND expr */
      case 202: /* expr ::= expr OR expr */ yytestcase(yyruleno==202);
      case 203: /* expr ::= expr LT|GT|GE|LE expr */ yytestcase(yyruleno==203);
      case 204: /* expr ::= expr EQ|NE expr */ yytestcase(yyruleno==204);
      case 205: /* expr ::= expr BITAND|BITOR|LSHIFT|RSHIFT expr */ yytestcase(yyruleno==205);
      case 206: /* expr ::= expr PLUS|MINUS expr */ yytestcase(yyruleno==206);
      case 207: /* expr ::= expr STAR|SLASH|REM expr */ yytestcase(yyruleno==207);
      case 208: /* expr ::= expr CONCAT expr */ yytestcase(yyruleno==208);
{spanBinaryExpr(&yygotominor.yy118,pParse,yymsp[-1].major,&yymsp[-2].minor.yy118,&yymsp[0].minor.yy118);}
        break;
      case 209: /* likeop ::= LIKE_KW */
      case 211: /* likeop ::= MATCH */ yytestcase(yyruleno==211);
{yygotominor.yy342.eOperator = yymsp[0].minor.yy0; yygotominor.yy342.bNot = 0;}
        break;
      case 210: /* likeop ::= NOT LIKE_KW */
      case 212: /* likeop ::= NOT MATCH */ yytestcase(yyruleno==212);
{yygotominor.yy342.eOperator = yymsp[0].minor.yy0; yygotominor.yy342.bNot = 1;}
        break;
      case 213: /* expr ::= expr likeop expr */
{
  ExprList *pList;
  pList = sqlite3ExprListAppend(pParse,0, yymsp[0].minor.yy118.pExpr);
  pList = sqlite3ExprListAppend(pParse,pList, yymsp[-2].minor.yy118.pExpr);
  yygotominor.yy118.pExpr = sqlite3ExprFunction(pParse, pList, &yymsp[-1].minor.yy342.eOperator);
  if( yymsp[-1].minor.yy342.bNot ) yygotominor.yy118.pExpr = sqlite3PExpr(pParse, TK_NOT, yygotominor.yy118.pExpr, 0, 0);
  yygotominor.yy118.zStart = yymsp[-2].minor.yy118.zStart;
  yygotominor.yy118.zEnd = yymsp[0].minor.yy118.zEnd;
  if( yygotominor.yy118.pExpr ) yygotominor.yy118.pExpr->flags |= EP_InfixFunc;
}
        break;
      case 214: /* expr ::= expr likeop expr ESCAPE expr */
{
  ExprList *pList;
  pList = sqlite3ExprListAppend(pParse,0, yymsp[-2].minor.yy118.pExpr);
  pList = sqlite3ExprListAppend(pParse,pList, yymsp[-4].minor.yy118.pExpr);
  pList = sqlite3ExprListAppend(pParse,pList, yymsp[0].minor.yy118.pExpr);
  yygotominor.yy118.pExpr = sqlite3ExprFunction(pParse, pList, &yymsp[-3].minor.yy342.eOperator);
  if( yymsp[-3].minor.yy342.bNot ) yygotominor.yy118.pExpr = sqlite3PExpr(pParse, TK_NOT, yygotominor.yy118.pExpr, 0, 0);
  yygotominor.yy118.zStart = yymsp[-4].minor.yy118.zStart;
  yygotominor.yy118.zEnd = yymsp[0].minor.yy118.zEnd;
  if( yygotominor.yy118.pExpr ) yygotominor.yy118.pExpr->flags |= EP_InfixFunc;
}
        break;
      case 215: /* expr ::= expr ISNULL|NOTNULL */
{spanUnaryPostfix(&yygotominor.yy118,pParse,yymsp[0].major,&yymsp[-1].minor.yy118,&yymsp[0].minor.yy0);}
        break;
      case 216: /* expr ::= expr NOT NULL */
{spanUnaryPostfix(&yygotominor.yy118,pParse,TK_NOTNULL,&yymsp[-2].minor.yy118,&yymsp[0].minor.yy0);}
        break;
      case 217: /* expr ::= expr IS expr */
{
  spanBinaryExpr(&yygotominor.yy118,pParse,TK_IS,&yymsp[-2].minor.yy118,&yymsp[0].minor.yy118);
  binaryToUnaryIfNull(pParse, yymsp[0].minor.yy118.pExpr, yygotominor.yy118.pExpr, TK_ISNULL);
}
        break;
      case 218: /* expr ::= expr IS NOT expr */
{
  spanBinaryExpr(&yygotominor.yy118,pParse,TK_ISNOT,&yymsp[-3].minor.yy118,&yymsp[0].minor.yy118);
  binaryToUnaryIfNull(pParse, yymsp[0].minor.yy118.pExpr, yygotominor.yy118.pExpr, TK_NOTNULL);
}
        break;
      case 219: /* expr ::= NOT expr */
      case 220: /* expr ::= BITNOT expr */ yytestcase(yyruleno==220);
{spanUnaryPrefix(&yygotominor.yy118,pParse,yymsp[-1].major,&yymsp[0].minor.yy118,&yymsp[-1].minor.yy0);}
        break;
      case 221: /* expr ::= MINUS expr */
{spanUnaryPrefix(&yygotominor.yy118,pParse,TK_UMINUS,&yymsp[0].minor.yy118,&yymsp[-1].minor.yy0);}
        break;
      case 222: /* expr ::= PLUS expr */
{spanUnaryPrefix(&yygotominor.yy118,pParse,TK_UPLUS,&yymsp[0].minor.yy118,&yymsp[-1].minor.yy0);}
        break;
      case 225: /* expr ::= expr between_op expr AND expr */
{
  ExprList *pList = sqlite3ExprListAppend(pParse,0, yymsp[-2].minor.yy118.pExpr);
  pList = sqlite3ExprListAppend(pParse,pList, yymsp[0].minor.yy118.pExpr);
  yygotominor.yy118.pExpr = sqlite3PExpr(pParse, TK_BETWEEN, yymsp[-4].minor.yy118.pExpr, 0, 0);
  if( yygotominor.yy118.pExpr ){
    yygotominor.yy118.pExpr->x.pList = pList;
  }else{
    sqlite3ExprListDelete(pParse->db, pList);
  } 
  if( yymsp[-3].minor.yy4 ) yygotominor.yy118.pExpr = sqlite3PExpr(pParse, TK_NOT, yygotominor.yy118.pExpr, 0, 0);
  yygotominor.yy118.zStart = yymsp[-4].minor.yy118.zStart;
  yygotominor.yy118.zEnd = yymsp[0].minor.yy118.zEnd;
}
        break;
      case 228: /* expr ::= expr in_op LP exprlist RP */
{
    if( yymsp[-1].minor.yy322==0 ){
      /* Expressions of the form
      **
      **      expr1 IN ()
      **      expr1 NOT IN ()
      **
      ** simplify to constants 0 (false) and 1 (true), respectively,
      ** regardless of the value of expr1.
      */
      yygotominor.yy118.pExpr = sqlite3PExpr(pParse, TK_INTEGER, 0, 0, &sqlite3IntTokens[yymsp[-3].minor.yy4]);
      sqlite3ExprDelete(pParse->db, yymsp[-4].minor.yy118.pExpr);
    }else{
      yygotominor.yy118.pExpr = sqlite3PExpr(pParse, TK_IN, yymsp[-4].minor.yy118.pExpr, 0, 0);
      if( yygotominor.yy118.pExpr ){
        yygotominor.yy118.pExpr->x.pList = yymsp[-1].minor.yy322;
        sqlite3ExprSetHeight(pParse, yygotominor.yy118.pExpr);
      }else{
        sqlite3ExprListDelete(pParse->db, yymsp[-1].minor.yy322);
      }
      if( yymsp[-3].minor.yy4 ) yygotominor.yy118.pExpr = sqlite3PExpr(pParse, TK_NOT, yygotominor.yy118.pExpr, 0, 0);
    }
    yygotominor.yy118.zStart = yymsp[-4].minor.yy118.zStart;
    yygotominor.yy118.zEnd = &yymsp[0].minor.yy0.z[yymsp[0].minor.yy0.n];
  }
        break;
      case 229: /* expr ::= LP select RP */
{
    yygotominor.yy118.pExpr = sqlite3PExpr(pParse, TK_SELECT, 0, 0, 0);
    if( yygotominor.yy118.pExpr ){
      yygotominor.yy118.pExpr->x.pSelect = yymsp[-1].minor.yy387;
      ExprSetProperty(yygotominor.yy118.pExpr, EP_xIsSelect);
      sqlite3ExprSetHeight(pParse, yygotominor.yy118.pExpr);
    }else{
      sqlite3SelectDelete(pParse->db, yymsp[-1].minor.yy387);
    }
    yygotominor.yy118.zStart = yymsp[-2].minor.yy0.z;
    yygotominor.yy118.zEnd = &yymsp[0].minor.yy0.z[yymsp[0].minor.yy0.n];
  }
        break;
      case 230: /* expr ::= expr in_op LP select RP */
{
    yygotominor.yy118.pExpr = sqlite3PExpr(pParse, TK_IN, yymsp[-4].minor.yy118.pExpr, 0, 0);
    if( yygotominor.yy118.pExpr ){
      yygotominor.yy118.pExpr->x.pSelect = yymsp[-1].minor.yy387;
      ExprSetProperty(yygotominor.yy118.pExpr, EP_xIsSelect);
      sqlite3ExprSetHeight(pParse, yygotominor.yy118.pExpr);
    }else{
      sqlite3SelectDelete(pParse->db, yymsp[-1].minor.yy387);
    }
    if( yymsp[-3].minor.yy4 ) yygotominor.yy118.pExpr = sqlite3PExpr(pParse, TK_NOT, yygotominor.yy118.pExpr, 0, 0);
    yygotominor.yy118.zStart = yymsp[-4].minor.yy118.zStart;
    yygotominor.yy118.zEnd = &yymsp[0].minor.yy0.z[yymsp[0].minor.yy0.n];
  }
        break;
      case 231: /* expr ::= expr in_op nm dbnm */
{
    SrcList *pSrc = sqlite3SrcListAppend(pParse->db, 0,&yymsp[-1].minor.yy0,&yymsp[0].minor.yy0);
    yygotominor.yy118.pExpr = sqlite3PExpr(pParse, TK_IN, yymsp[-3].minor.yy118.pExpr, 0, 0);
    if( yygotominor.yy118.pExpr ){
      yygotominor.yy118.pExpr->x.pSelect = sqlite3SelectNew(pParse, 0,pSrc,0,0,0,0,0,0,0);
      ExprSetProperty(yygotominor.yy118.pExpr, EP_xIsSelect);
      sqlite3ExprSetHeight(pParse, yygotominor.yy118.pExpr);
    }else{
      sqlite3SrcListDelete(pParse->db, pSrc);
    }
    if( yymsp[-2].minor.yy4 ) yygotominor.yy118.pExpr = sqlite3PExpr(pParse, TK_NOT, yygotominor.yy118.pExpr, 0, 0);
    yygotominor.yy118.zStart = yymsp[-3].minor.yy118.zStart;
    yygotominor.yy118.zEnd = yymsp[0].minor.yy0.z ? &yymsp[0].minor.yy0.z[yymsp[0].minor.yy0.n] : &yymsp[-1].minor.yy0.z[yymsp[-1].minor.yy0.n];
  }
        break;
      case 232: /* expr ::= EXISTS LP select RP */
{
    Expr *p = yygotominor.yy118.pExpr = sqlite3PExpr(pParse, TK_EXISTS, 0, 0, 0);
    if( p ){
      p->x.pSelect = yymsp[-1].minor.yy387;
      ExprSetProperty(p, EP_xIsSelect);
      sqlite3ExprSetHeight(pParse, p);
    }else{
      sqlite3SelectDelete(pParse->db, yymsp[-1].minor.yy387);
    }
    yygotominor.yy118.zStart = yymsp[-3].minor.yy0.z;
    yygotominor.yy118.zEnd = &yymsp[0].minor.yy0.z[yymsp[0].minor.yy0.n];
  }
        break;
      case 233: /* expr ::= CASE case_operand case_exprlist case_else END */
{
  yygotominor.yy118.pExpr = sqlite3PExpr(pParse, TK_CASE, yymsp[-3].minor.yy314, 0, 0);
  if( yygotominor.yy118.pExpr ){
    yygotominor.yy118.pExpr->x.pList = yymsp[-1].minor.yy314 ? sqlite3ExprListAppend(pParse,yymsp[-2].minor.yy322,yymsp[-1].minor.yy314) : yymsp[-2].minor.yy322;
    sqlite3ExprSetHeight(pParse, yygotominor.yy118.pExpr);
  }else{
    sqlite3ExprListDelete(pParse->db, yymsp[-2].minor.yy322);
    sqlite3ExprDelete(pParse->db, yymsp[-1].minor.yy314);
  }
  yygotominor.yy118.zStart = yymsp[-4].minor.yy0.z;
  yygotominor.yy118.zEnd = &yymsp[0].minor.yy0.z[yymsp[0].minor.yy0.n];
}
        break;
      case 234: /* case_exprlist ::= case_exprlist WHEN expr THEN expr */
{
  yygotominor.yy322 = sqlite3ExprListAppend(pParse,yymsp[-4].minor.yy322, yymsp[-2].minor.yy118.pExpr);
  yygotominor.yy322 = sqlite3ExprListAppend(pParse,yygotominor.yy322, yymsp[0].minor.yy118.pExpr);
}
        break;
      case 235: /* case_exprlist ::= WHEN expr THEN expr */
{
  yygotominor.yy322 = sqlite3ExprListAppend(pParse,0, yymsp[-2].minor.yy118.pExpr);
  yygotominor.yy322 = sqlite3ExprListAppend(pParse,yygotominor.yy322, yymsp[0].minor.yy118.pExpr);
}
        break;
      case 242: /* nexprlist ::= nexprlist COMMA expr */
{yygotominor.yy322 = sqlite3ExprListAppend(pParse,yymsp[-2].minor.yy322,yymsp[0].minor.yy118.pExpr);}
        break;
      case 243: /* nexprlist ::= expr */
{yygotominor.yy322 = sqlite3ExprListAppend(pParse,0,yymsp[0].minor.yy118.pExpr);}
        break;
      case 244: /* cmd ::= createkw uniqueflag INDEX ifnotexists nm dbnm ON nm LP idxlist RP where_opt */
{
  sqlite3CreateIndex(pParse, &yymsp[-7].minor.yy0, &yymsp[-6].minor.yy0, 
                     sqlite3SrcListAppend(pParse->db,0,&yymsp[-4].minor.yy0,0), yymsp[-2].minor.yy322, yymsp[-10].minor.yy4,
                      &yymsp[-11].minor.yy0, yymsp[0].minor.yy314, SQLITE_SO_ASC, yymsp[-8].minor.yy4);
}
        break;
      case 245: /* uniqueflag ::= UNIQUE */
      case 298: /* raisetype ::= ABORT */ yytestcase(yyruleno==298);
{yygotominor.yy4 = OE_Abort;}
        break;
      case 246: /* uniqueflag ::= */
{yygotominor.yy4 = OE_None;}
        break;
      case 249: /* idxlist ::= idxlist COMMA nm collate sortorder */
{
  Expr *p = sqlite3ExprAddCollateToken(pParse, 0, &yymsp[-1].minor.yy0);
  yygotominor.yy322 = sqlite3ExprListAppend(pParse,yymsp[-4].minor.yy322, p);
  sqlite3ExprListSetName(pParse,yygotominor.yy322,&yymsp[-2].minor.yy0,1);
  sqlite3ExprListCheckLength(pParse, yygotominor.yy322, "index");
  if( yygotominor.yy322 ) yygotominor.yy322->a[yygotominor.yy322->nExpr-1].sortOrder = (u8)yymsp[0].minor.yy4;
}
        break;
      case 250: /* idxlist ::= nm collate sortorder */
{
  Expr *p = sqlite3ExprAddCollateToken(pParse, 0, &yymsp[-1].minor.yy0);
  yygotominor.yy322 = sqlite3ExprListAppend(pParse,0, p);
  sqlite3ExprListSetName(pParse, yygotominor.yy322, &yymsp[-2].minor.yy0, 1);
  sqlite3ExprListCheckLength(pParse, yygotominor.yy322, "index");
  if( yygotominor.yy322 ) yygotominor.yy322->a[yygotominor.yy322->nExpr-1].sortOrder = (u8)yymsp[0].minor.yy4;
}
        break;
      case 251: /* collate ::= */
{yygotominor.yy0.z = 0; yygotominor.yy0.n = 0;}
        break;
      case 253: /* cmd ::= DROP INDEX ifexists fullname */
{sqlite3DropIndex(pParse, yymsp[0].minor.yy259, yymsp[-1].minor.yy4);}
        break;
      case 254: /* cmd ::= VACUUM */
      case 255: /* cmd ::= VACUUM nm */ yytestcase(yyruleno==255);
{sqlite3Vacuum(pParse);}
        break;
      case 256: /* cmd ::= PRAGMA nm dbnm */
{sqlite3Pragma(pParse,&yymsp[-1].minor.yy0,&yymsp[0].minor.yy0,0,0);}
        break;
      case 257: /* cmd ::= PRAGMA nm dbnm EQ nmnum */
{sqlite3Pragma(pParse,&yymsp[-3].minor.yy0,&yymsp[-2].minor.yy0,&yymsp[0].minor.yy0,0);}
        break;
      case 258: /* cmd ::= PRAGMA nm dbnm LP nmnum RP */
{sqlite3Pragma(pParse,&yymsp[-4].minor.yy0,&yymsp[-3].minor.yy0,&yymsp[-1].minor.yy0,0);}
        break;
      case 259: /* cmd ::= PRAGMA nm dbnm EQ minus_num */
{sqlite3Pragma(pParse,&yymsp[-3].minor.yy0,&yymsp[-2].minor.yy0,&yymsp[0].minor.yy0,1);}
        break;
      case 260: /* cmd ::= PRAGMA nm dbnm LP minus_num RP */
{sqlite3Pragma(pParse,&yymsp[-4].minor.yy0,&yymsp[-3].minor.yy0,&yymsp[-1].minor.yy0,1);}
        break;
      case 270: /* cmd ::= createkw trigger_decl BEGIN trigger_cmd_list END */
{
  Token all;
  all.z = yymsp[-3].minor.yy0.z;
  all.n = (int)(yymsp[0].minor.yy0.z - yymsp[-3].minor.yy0.z) + yymsp[0].minor.yy0.n;
  sqlite3FinishTrigger(pParse, yymsp[-1].minor.yy203, &all);
}
        break;
      case 271: /* trigger_decl ::= temp TRIGGER ifnotexists nm dbnm trigger_time trigger_event ON fullname foreach_clause when_clause */
{
  sqlite3BeginTrigger(pParse, &yymsp[-7].minor.yy0, &yymsp[-6].minor.yy0, yymsp[-5].minor.yy4, yymsp[-4].minor.yy90.a, yymsp[-4].minor.yy90.b, yymsp[-2].minor.yy259, yymsp[0].minor.yy314, yymsp[-10].minor.yy4, yymsp[-8].minor.yy4);
  yygotominor.yy0 = (yymsp[-6].minor.yy0.n==0?yymsp[-7].minor.yy0:yymsp[-6].minor.yy0);
}
        break;
      case 272: /* trigger_time ::= BEFORE */
      case 275: /* trigger_time ::= */ yytestcase(yyruleno==275);
{ yygotominor.yy4 = TK_BEFORE; }
        break;
      case 273: /* trigger_time ::= AFTER */
{ yygotominor.yy4 = TK_AFTER;  }
        break;
      case 274: /* trigger_time ::= INSTEAD OF */
{ yygotominor.yy4 = TK_INSTEAD;}
        break;
      case 276: /* trigger_event ::= DELETE|INSERT */
      case 277: /* trigger_event ::= UPDATE */ yytestcase(yyruleno==277);
{yygotominor.yy90.a = yymsp[0].major; yygotominor.yy90.b = 0;}
        break;
      case 278: /* trigger_event ::= UPDATE OF idlist */
{yygotominor.yy90.a = TK_UPDATE; yygotominor.yy90.b = yymsp[0].minor.yy384;}
        break;
      case 281: /* when_clause ::= */
      case 303: /* key_opt ::= */ yytestcase(yyruleno==303);
{ yygotominor.yy314 = 0; }
        break;
      case 282: /* when_clause ::= WHEN expr */
      case 304: /* key_opt ::= KEY expr */ yytestcase(yyruleno==304);
{ yygotominor.yy314 = yymsp[0].minor.yy118.pExpr; }
        break;
      case 283: /* trigger_cmd_list ::= trigger_cmd_list trigger_cmd SEMI */
{
  assert( yymsp[-2].minor.yy203!=0 );
  yymsp[-2].minor.yy203->pLast->pNext = yymsp[-1].minor.yy203;
  yymsp[-2].minor.yy203->pLast = yymsp[-1].minor.yy203;
  yygotominor.yy203 = yymsp[-2].minor.yy203;
}
        break;
      case 284: /* trigger_cmd_list ::= trigger_cmd SEMI */
{ 
  assert( yymsp[-1].minor.yy203!=0 );
  yymsp[-1].minor.yy203->pLast = yymsp[-1].minor.yy203;
  yygotominor.yy203 = yymsp[-1].minor.yy203;
}
        break;
      case 286: /* trnm ::= nm DOT nm */
{
  yygotominor.yy0 = yymsp[0].minor.yy0;
  sqlite3ErrorMsg(pParse, 
        "qualified table names are not allowed on INSERT, UPDATE, and DELETE "
        "statements within triggers");
}
        break;
      case 288: /* tridxby ::= INDEXED BY nm */
{
  sqlite3ErrorMsg(pParse,
        "the INDEXED BY clause is not allowed on UPDATE or DELETE statements "
        "within triggers");
}
        break;
      case 289: /* tridxby ::= NOT INDEXED */
{
  sqlite3ErrorMsg(pParse,
        "the NOT INDEXED clause is not allowed on UPDATE or DELETE statements "
        "within triggers");
}
        break;
      case 290: /* trigger_cmd ::= UPDATE orconf trnm tridxby SET setlist where_opt */
{ yygotominor.yy203 = sqlite3TriggerUpdateStep(pParse->db, &yymsp[-4].minor.yy0, yymsp[-1].minor.yy322, yymsp[0].minor.yy314, yymsp[-5].minor.yy210); }
        break;
      case 291: /* trigger_cmd ::= insert_cmd INTO trnm inscollist_opt valuelist */
{yygotominor.yy203 = sqlite3TriggerInsertStep(pParse->db, &yymsp[-2].minor.yy0, yymsp[-1].minor.yy384, yymsp[0].minor.yy260.pList, yymsp[0].minor.yy260.pSelect, yymsp[-4].minor.yy210);}
        break;
      case 292: /* trigger_cmd ::= insert_cmd INTO trnm inscollist_opt select */
{yygotominor.yy203 = sqlite3TriggerInsertStep(pParse->db, &yymsp[-2].minor.yy0, yymsp[-1].minor.yy384, 0, yymsp[0].minor.yy387, yymsp[-4].minor.yy210);}
        break;
      case 293: /* trigger_cmd ::= DELETE FROM trnm tridxby where_opt */
{yygotominor.yy203 = sqlite3TriggerDeleteStep(pParse->db, &yymsp[-2].minor.yy0, yymsp[0].minor.yy314);}
        break;
      case 294: /* trigger_cmd ::= select */
{yygotominor.yy203 = sqlite3TriggerSelectStep(pParse->db, yymsp[0].minor.yy387); }
        break;
      case 295: /* expr ::= RAISE LP IGNORE RP */
{
  yygotominor.yy118.pExpr = sqlite3PExpr(pParse, TK_RAISE, 0, 0, 0); 
  if( yygotominor.yy118.pExpr ){
    yygotominor.yy118.pExpr->affinity = OE_Ignore;
  }
  yygotominor.yy118.zStart = yymsp[-3].minor.yy0.z;
  yygotominor.yy118.zEnd = &yymsp[0].minor.yy0.z[yymsp[0].minor.yy0.n];
}
        break;
      case 296: /* expr ::= RAISE LP raisetype COMMA nm RP */
{
  yygotominor.yy118.pExpr = sqlite3PExpr(pParse, TK_RAISE, 0, 0, &yymsp[-1].minor.yy0); 
  if( yygotominor.yy118.pExpr ) {
    yygotominor.yy118.pExpr->affinity = (char)yymsp[-3].minor.yy4;
  }
  yygotominor.yy118.zStart = yymsp[-5].minor.yy0.z;
  yygotominor.yy118.zEnd = &yymsp[0].minor.yy0.z[yymsp[0].minor.yy0.n];
}
        break;
      case 297: /* raisetype ::= ROLLBACK */
{yygotominor.yy4 = OE_Rollback;}
        break;
      case 299: /* raisetype ::= FAIL */
{yygotominor.yy4 = OE_Fail;}
        break;
      case 300: /* cmd ::= DROP TRIGGER ifexists fullname */
{
  sqlite3DropTrigger(pParse,yymsp[0].minor.yy259,yymsp[-1].minor.yy4);
}
        break;
      case 301: /* cmd ::= ATTACH database_kw_opt expr AS expr key_opt */
{
  sqlite3Attach(pParse, yymsp[-3].minor.yy118.pExpr, yymsp[-1].minor.yy118.pExpr, yymsp[0].minor.yy314);
}
        break;
      case 302: /* cmd ::= DETACH database_kw_opt expr */
{
  sqlite3Detach(pParse, yymsp[0].minor.yy118.pExpr);
}
        break;
      case 307: /* cmd ::= REINDEX */
{sqlite3Reindex(pParse, 0, 0);}
        break;
      case 308: /* cmd ::= REINDEX nm dbnm */
{sqlite3Reindex(pParse, &yymsp[-1].minor.yy0, &yymsp[0].minor.yy0);}
        break;
      case 309: /* cmd ::= ANALYZE */
{sqlite3Analyze(pParse, 0, 0);}
        break;
      case 310: /* cmd ::= ANALYZE nm dbnm */
{sqlite3Analyze(pParse, &yymsp[-1].minor.yy0, &yymsp[0].minor.yy0);}
        break;
      case 311: /* cmd ::= ALTER TABLE fullname RENAME TO nm */
{
  sqlite3AlterRenameTable(pParse,yymsp[-3].minor.yy259,&yymsp[0].minor.yy0);
}
        break;
      case 312: /* cmd ::= ALTER TABLE add_column_fullname ADD kwcolumn_opt column */
{
  sqlite3AlterFinishAddColumn(pParse, &yymsp[0].minor.yy0);
}
        break;
      case 313: /* add_column_fullname ::= fullname */
{
  pParse->db->lookaside.bEnabled = 0;
  sqlite3AlterBeginAddColumn(pParse, yymsp[0].minor.yy259);
}
        break;
      case 316: /* cmd ::= create_vtab */
{sqlite3VtabFinishParse(pParse,0);}
        break;
      case 317: /* cmd ::= create_vtab LP vtabarglist RP */
{sqlite3VtabFinishParse(pParse,&yymsp[0].minor.yy0);}
        break;
      case 318: /* create_vtab ::= createkw VIRTUAL TABLE ifnotexists nm dbnm USING nm */
{
    sqlite3VtabBeginParse(pParse, &yymsp[-3].minor.yy0, &yymsp[-2].minor.yy0, &yymsp[0].minor.yy0, yymsp[-4].minor.yy4);
}
        break;
      case 321: /* vtabarg ::= */
{sqlite3VtabArgInit(pParse);}
        break;
      case 323: /* vtabargtoken ::= ANY */
      case 324: /* vtabargtoken ::= lp anylist RP */ yytestcase(yyruleno==324);
      case 325: /* lp ::= LP */ yytestcase(yyruleno==325);
{sqlite3VtabArgExtend(pParse,&yymsp[0].minor.yy0);}

















        break;
      default:
      /* (0) input ::= cmdlist */ yytestcase(yyruleno==0);
      /* (1) cmdlist ::= cmdlist ecmd */ yytestcase(yyruleno==1);
      /* (2) cmdlist ::= ecmd */ yytestcase(yyruleno==2);
      /* (3) ecmd ::= SEMI */ yytestcase(yyruleno==3);
      /* (4) ecmd ::= explain cmdx SEMI */ yytestcase(yyruleno==4);
................................................................................
      /* (11) trans_opt ::= TRANSACTION */ yytestcase(yyruleno==11);
      /* (12) trans_opt ::= TRANSACTION nm */ yytestcase(yyruleno==12);
      /* (20) savepoint_opt ::= SAVEPOINT */ yytestcase(yyruleno==20);
      /* (21) savepoint_opt ::= */ yytestcase(yyruleno==21);
      /* (25) cmd ::= create_table create_table_args */ yytestcase(yyruleno==25);
      /* (36) columnlist ::= columnlist COMMA column */ yytestcase(yyruleno==36);
      /* (37) columnlist ::= column */ yytestcase(yyruleno==37);
      /* (46) type ::= */ yytestcase(yyruleno==46);
      /* (53) signed ::= plus_num */ yytestcase(yyruleno==53);
      /* (54) signed ::= minus_num */ yytestcase(yyruleno==54);
      /* (55) carglist ::= carglist ccons */ yytestcase(yyruleno==55);
      /* (56) carglist ::= */ yytestcase(yyruleno==56);
      /* (63) ccons ::= NULL onconf */ yytestcase(yyruleno==63);
      /* (91) conslist ::= conslist tconscomma tcons */ yytestcase(yyruleno==91);
      /* (92) conslist ::= tcons */ yytestcase(yyruleno==92);
      /* (94) tconscomma ::= */ yytestcase(yyruleno==94);
      /* (279) foreach_clause ::= */ yytestcase(yyruleno==279);
      /* (280) foreach_clause ::= FOR EACH ROW */ yytestcase(yyruleno==280);
      /* (287) tridxby ::= */ yytestcase(yyruleno==287);
      /* (305) database_kw_opt ::= DATABASE */ yytestcase(yyruleno==305);
      /* (306) database_kw_opt ::= */ yytestcase(yyruleno==306);
      /* (314) kwcolumn_opt ::= */ yytestcase(yyruleno==314);
      /* (315) kwcolumn_opt ::= COLUMNKW */ yytestcase(yyruleno==315);
      /* (319) vtabarglist ::= vtabarg */ yytestcase(yyruleno==319);
      /* (320) vtabarglist ::= vtabarglist COMMA vtabarg */ yytestcase(yyruleno==320);
      /* (322) vtabarg ::= vtabarg vtabargtoken */ yytestcase(yyruleno==322);
      /* (326) anylist ::= */ yytestcase(yyruleno==326);
      /* (327) anylist ::= anylist LP anylist RP */ yytestcase(yyruleno==327);
      /* (328) anylist ::= anylist ANY */ yytestcase(yyruleno==328);
        break;
  };
  assert( yyruleno>=0 && yyruleno<sizeof(yyRuleInfo)/sizeof(yyRuleInfo[0]) );
  yygoto = yyRuleInfo[yyruleno].lhs;
  yysize = yyRuleInfo[yyruleno].nrhs;
  yypParser->yyidx -= yysize;
  yyact = yy_find_reduce_action(yymsp[-yysize].stateno,(YYCODETYPE)yygoto);
................................................................................
** The code in this file implements a function that determines whether
** or not a given identifier is really an SQL keyword.  The same thing
** might be implemented more directly using a hand-written hash table.
** But by using this automatically generated code, the size of the code
** is substantially reduced.  This is important for embedded applications
** on platforms with limited memory.
*/
/* Hash score: 177 */
static int keywordCode(const char *z, int n){
  /* zText[] encodes 819 bytes of keywords in 545 bytes */
  /*   REINDEXEDESCAPEACHECKEYBEFOREIGNOREGEXPLAINSTEADDATABASELECT       */
  /*   ABLEFTHENDEFERRABLELSEXCEPTRANSACTIONATURALTERAISEXCLUSIVE         */
  /*   XISTSAVEPOINTERSECTRIGGEREFERENCESCONSTRAINTOFFSETEMPORARY         */
  /*   UNIQUERYWITHOUTERELEASEATTACHAVINGROUPDATEBEGINNERENAMEBETWEEN     */
  /*   OTNULLIKECASCADELETECASECOLLATECREATECURRENT_DATEDETACH            */
  /*   IMMEDIATEJOINSERTMATCHPLANALYZEPRAGMABORTVALUESVIRTUALIMITWHEN     */
  /*   WHEREPLACEAFTERESTRICTANDEFAULTAUTOINCREMENTCASTCOLUMNCOMMIT       */
  /*   CONFLICTCROSSCURRENT_TIMESTAMPRIMARYDEFERREDISTINCTDROPFAIL        */
  /*   FROMFULLGLOBYIFISNULLORDERIGHTROLLBACKROWUNIONUSINGVACUUMVIEW      */
  /*   INITIALLY                                                          */
  static const char zText[544] = {
    'R','E','I','N','D','E','X','E','D','E','S','C','A','P','E','A','C','H',
    'E','C','K','E','Y','B','E','F','O','R','E','I','G','N','O','R','E','G',
    'E','X','P','L','A','I','N','S','T','E','A','D','D','A','T','A','B','A',
    'S','E','L','E','C','T','A','B','L','E','F','T','H','E','N','D','E','F',
    'E','R','R','A','B','L','E','L','S','E','X','C','E','P','T','R','A','N',
    'S','A','C','T','I','O','N','A','T','U','R','A','L','T','E','R','A','I',
    'S','E','X','C','L','U','S','I','V','E','X','I','S','T','S','A','V','E',
    'P','O','I','N','T','E','R','S','E','C','T','R','I','G','G','E','R','E',
    'F','E','R','E','N','C','E','S','C','O','N','S','T','R','A','I','N','T',
    'O','F','F','S','E','T','E','M','P','O','R','A','R','Y','U','N','I','Q',
    'U','E','R','Y','W','I','T','H','O','U','T','E','R','E','L','E','A','S',
    'E','A','T','T','A','C','H','A','V','I','N','G','R','O','U','P','D','A',
    'T','E','B','E','G','I','N','N','E','R','E','N','A','M','E','B','E','T',
    'W','E','E','N','O','T','N','U','L','L','I','K','E','C','A','S','C','A',
    'D','E','L','E','T','E','C','A','S','E','C','O','L','L','A','T','E','C',
    'R','E','A','T','E','C','U','R','R','E','N','T','_','D','A','T','E','D',
    'E','T','A','C','H','I','M','M','E','D','I','A','T','E','J','O','I','N',
    'S','E','R','T','M','A','T','C','H','P','L','A','N','A','L','Y','Z','E',
    'P','R','A','G','M','A','B','O','R','T','V','A','L','U','E','S','V','I',
    'R','T','U','A','L','I','M','I','T','W','H','E','N','W','H','E','R','E',
    'P','L','A','C','E','A','F','T','E','R','E','S','T','R','I','C','T','A',
    'N','D','E','F','A','U','L','T','A','U','T','O','I','N','C','R','E','M',
    'E','N','T','C','A','S','T','C','O','L','U','M','N','C','O','M','M','I',
    'T','C','O','N','F','L','I','C','T','C','R','O','S','S','C','U','R','R',
    'E','N','T','_','T','I','M','E','S','T','A','M','P','R','I','M','A','R',
    'Y','D','E','F','E','R','R','E','D','I','S','T','I','N','C','T','D','R',
    'O','P','F','A','I','L','F','R','O','M','F','U','L','L','G','L','O','B',
    'Y','I','F','I','S','N','U','L','L','O','R','D','E','R','I','G','H','T',
    'R','O','L','L','B','A','C','K','R','O','W','U','N','I','O','N','U','S',
    'I','N','G','V','A','C','U','U','M','V','I','E','W','I','N','I','T','I',
    'A','L','L','Y',
  };
  static const unsigned char aHash[127] = {
      75, 104, 115,  73,   0,  45,   0,   0,  81,   0,  76,   0,   0,
      42,  12,  77,  15,   0, 114,  84,  53, 111,   0,  19,   0,   0,
     119,   0, 117,  88,   0,  22,  92,   0,   9,   0,   0,  69,  70,
       0,  68,   6,   0,  48,  89, 101,   0, 116, 100,   0,   0,  44,
       0, 102,  24,   0,  17,   0, 120,  52,  23,   0,   5, 109,  25,
      95,   0,   0, 122, 105,  59, 121,  56,  28,  54,   0,  90,   0,
      99,  26,   0,  98,   0,   0,   0,  94,  91,  96,  87, 108,  14,
      39, 107,   0,  80,   0,  18,  86, 110,  32,   0, 118,  79, 112,
      61,  46,  83,   0,   0,  93,  40,   0, 113,   0,  36,   0,   0,
      29,   0,  85,  62,  63,   0,  20,  60,   0,  55,
  };
  static const unsigned char aNext[122] = {
       0,   0,   0,   0,   4,   0,   0,   0,   0,   0,   0,   0,   0,
       0,   2,   0,   0,   0,   0,   0,   0,  13,   0,   0,   0,   0,
       0,   7,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,
       0,   0,   0,   0,  33,   0,  21,   0,   0,   0,   0,   0,   0,
      43,   3,  47,   0,   0,   0,   0,  30,   0,  57,   0,  38,   0,
       0,   0,   1,  65,   0,   0,  66,   0,  41,   0,   0,   0,   0,
       0,   0,  49,  64,   0,   0,   0,  51,  31,   0,  16,  34,  10,
       0,   0,   0,   0,   0,   0,   0,  11,  71,  78,   0,   8,   0,
     103,  97,   0, 106,   0,  58,   0,  74,  50,  27,  37,  72,  82,
       0,  35,  67,   0,   0,
  };
  static const unsigned char aLen[122] = {
       7,   7,   5,   4,   6,   4,   5,   3,   6,   7,   3,   6,   6,
       7,   7,   3,   8,   2,   6,   5,   4,   4,   3,  10,   4,   6,
      11,   6,   2,   7,   5,   5,   9,   6,   9,   9,   7,  10,  10,
       4,   6,   2,   3,   9,   4,   2,   6,   5,   7,   5,   7,   6,
       6,   5,   6,   5,   5,   6,   7,   7,   3,   2,   4,   4,   7,
       3,   6,   4,   7,   6,  12,   6,   9,   4,   6,   5,   4,   7,
       6,   5,   6,   7,   5,   4,   5,   7,   5,   8,   3,   7,  13,
       2,   2,   4,   6,   6,   8,   5,  17,  12,   7,   8,   8,   2,
       4,   4,   4,   4,   4,   2,   2,   6,   5,   5,   8,   3,   5,
       5,   6,   4,   9,   3,
  };
  static const unsigned short int aOffset[122] = {
       0,   2,   2,   8,   9,  14,  16,  20,  23,  25,  25,  29,  33,
      36,  41,  46,  48,  53,  54,  59,  62,  65,  67,  69,  78,  81,
      86,  91,  95,  96, 101, 105, 109, 117, 122, 128, 136, 142, 152,
     159, 162, 162, 165, 167, 167, 171, 176, 179, 184, 188, 192, 199,
     204, 209, 212, 218, 221, 225, 231, 237, 237, 237, 240, 243, 247,
     248, 252, 258, 262, 269, 275, 287, 293, 302, 304, 310, 315, 317,
     324, 329, 334, 340, 346, 351, 355, 358, 365, 369, 377, 379, 386,
     388, 390, 399, 403, 409, 415, 423, 428, 428, 444, 451, 458, 459,
     466, 470, 474, 478, 482, 485, 487, 489, 495, 499, 504, 512, 515,
     520, 525, 531, 535, 540,
  };
  static const unsigned char aCode[122] = {
    TK_REINDEX,    TK_INDEXED,    TK_INDEX,      TK_DESC,       TK_ESCAPE,     
    TK_EACH,       TK_CHECK,      TK_KEY,        TK_BEFORE,     TK_FOREIGN,    
    TK_FOR,        TK_IGNORE,     TK_LIKE_KW,    TK_EXPLAIN,    TK_INSTEAD,    
    TK_ADD,        TK_DATABASE,   TK_AS,         TK_SELECT,     TK_TABLE,      
    TK_JOIN_KW,    TK_THEN,       TK_END,        TK_DEFERRABLE, TK_ELSE,       
    TK_EXCEPT,     TK_TRANSACTION,TK_ACTION,     TK_ON,         TK_JOIN_KW,    
    TK_ALTER,      TK_RAISE,      TK_EXCLUSIVE,  TK_EXISTS,     TK_SAVEPOINT,  
    TK_INTERSECT,  TK_TRIGGER,    TK_REFERENCES, TK_CONSTRAINT, TK_INTO,       
    TK_OFFSET,     TK_OF,         TK_SET,        TK_TEMP,       TK_TEMP,       
    TK_OR,         TK_UNIQUE,     TK_QUERY,      TK_WITHOUT,    TK_JOIN_KW,    
    TK_RELEASE,    TK_ATTACH,     TK_HAVING,     TK_GROUP,      TK_UPDATE,     
    TK_BEGIN,      TK_JOIN_KW,    TK_RENAME,     TK_BETWEEN,    TK_NOTNULL,    
    TK_NOT,        TK_NO,         TK_NULL,       TK_LIKE_KW,    TK_CASCADE,    
    TK_ASC,        TK_DELETE,     TK_CASE,       TK_COLLATE,    TK_CREATE,     
    TK_CTIME_KW,   TK_DETACH,     TK_IMMEDIATE,  TK_JOIN,       TK_INSERT,     
    TK_MATCH,      TK_PLAN,       TK_ANALYZE,    TK_PRAGMA,     TK_ABORT,      
    TK_VALUES,     TK_VIRTUAL,    TK_LIMIT,      TK_WHEN,       TK_WHERE,      
    TK_REPLACE,    TK_AFTER,      TK_RESTRICT,   TK_AND,        TK_DEFAULT,    
    TK_AUTOINCR,   TK_TO,         TK_IN,         TK_CAST,       TK_COLUMNKW,   
    TK_COMMIT,     TK_CONFLICT,   TK_JOIN_KW,    TK_CTIME_KW,   TK_CTIME_KW,   
    TK_PRIMARY,    TK_DEFERRED,   TK_DISTINCT,   TK_IS,         TK_DROP,       
    TK_FAIL,       TK_FROM,       TK_JOIN_KW,    TK_LIKE_KW,    TK_BY,         
    TK_IF,         TK_ISNULL,     TK_ORDER,      TK_JOIN_KW,    TK_ROLLBACK,   
    TK_ROW,        TK_UNION,      TK_USING,      TK_VACUUM,     TK_VIEW,       
    TK_INITIALLY,  TK_ALL,        
  };
  int h, i;
  if( n<2 ) return TK_ID;
  h = ((charMap(z[0])*4) ^
      (charMap(z[n-1])*3) ^
      n) % 127;
  for(i=((int)aHash[h])-1; i>=0; i=((int)aNext[i])-1){
................................................................................
      testcase( i==42 ); /* SET */
      testcase( i==43 ); /* TEMPORARY */
      testcase( i==44 ); /* TEMP */
      testcase( i==45 ); /* OR */
      testcase( i==46 ); /* UNIQUE */
      testcase( i==47 ); /* QUERY */
      testcase( i==48 ); /* WITHOUT */
      testcase( i==49 ); /* OUTER */
      testcase( i==50 ); /* RELEASE */
      testcase( i==51 ); /* ATTACH */
      testcase( i==52 ); /* HAVING */
      testcase( i==53 ); /* GROUP */
      testcase( i==54 ); /* UPDATE */
      testcase( i==55 ); /* BEGIN */
      testcase( i==56 ); /* INNER */
      testcase( i==57 ); /* RENAME */
      testcase( i==58 ); /* BETWEEN */
      testcase( i==59 ); /* NOTNULL */
      testcase( i==60 ); /* NOT */
      testcase( i==61 ); /* NO */
      testcase( i==62 ); /* NULL */
      testcase( i==63 ); /* LIKE */
      testcase( i==64 ); /* CASCADE */
      testcase( i==65 ); /* ASC */
      testcase( i==66 ); /* DELETE */
      testcase( i==67 ); /* CASE */
      testcase( i==68 ); /* COLLATE */
      testcase( i==69 ); /* CREATE */
      testcase( i==70 ); /* CURRENT_DATE */
      testcase( i==71 ); /* DETACH */
      testcase( i==72 ); /* IMMEDIATE */
      testcase( i==73 ); /* JOIN */
      testcase( i==74 ); /* INSERT */
      testcase( i==75 ); /* MATCH */
      testcase( i==76 ); /* PLAN */
      testcase( i==77 ); /* ANALYZE */
      testcase( i==78 ); /* PRAGMA */
      testcase( i==79 ); /* ABORT */
      testcase( i==80 ); /* VALUES */
      testcase( i==81 ); /* VIRTUAL */
      testcase( i==82 ); /* LIMIT */
      testcase( i==83 ); /* WHEN */
      testcase( i==84 ); /* WHERE */
      testcase( i==85 ); /* REPLACE */
      testcase( i==86 ); /* AFTER */
      testcase( i==87 ); /* RESTRICT */
      testcase( i==88 ); /* AND */
      testcase( i==89 ); /* DEFAULT */
      testcase( i==90 ); /* AUTOINCREMENT */
      testcase( i==91 ); /* TO */
      testcase( i==92 ); /* IN */
      testcase( i==93 ); /* CAST */
      testcase( i==94 ); /* COLUMN */
      testcase( i==95 ); /* COMMIT */
      testcase( i==96 ); /* CONFLICT */
      testcase( i==97 ); /* CROSS */
      testcase( i==98 ); /* CURRENT_TIMESTAMP */
      testcase( i==99 ); /* CURRENT_TIME */
      testcase( i==100 ); /* PRIMARY */
      testcase( i==101 ); /* DEFERRED */
      testcase( i==102 ); /* DISTINCT */
      testcase( i==103 ); /* IS */
      testcase( i==104 ); /* DROP */
      testcase( i==105 ); /* FAIL */
      testcase( i==106 ); /* FROM */
      testcase( i==107 ); /* FULL */
      testcase( i==108 ); /* GLOB */
      testcase( i==109 ); /* BY */
      testcase( i==110 ); /* IF */
      testcase( i==111 ); /* ISNULL */
      testcase( i==112 ); /* ORDER */
      testcase( i==113 ); /* RIGHT */
      testcase( i==114 ); /* ROLLBACK */
      testcase( i==115 ); /* ROW */
      testcase( i==116 ); /* UNION */
      testcase( i==117 ); /* USING */
      testcase( i==118 ); /* VACUUM */
      testcase( i==119 ); /* VIEW */
      testcase( i==120 ); /* INITIALLY */
      testcase( i==121 ); /* ALL */


      return aCode[i];
    }
  }
  return TK_ID;
}
SQLITE_PRIVATE int sqlite3KeywordCode(const unsigned char *z, int n){
  return keywordCode((char*)z, n);
}
#define SQLITE_N_KEYWORD 122

/************** End of keywordhash.h *****************************************/
/************** Continuing where we left off in tokenize.c *******************/


/*
** If X is a character that can be used in an identifier then
................................................................................
      return i;
    }
    case '?': {
      *tokenType = TK_VARIABLE;
      for(i=1; sqlite3Isdigit(z[i]); i++){}
      return i;
    }
    case '#': {
      for(i=1; sqlite3Isdigit(z[i]); i++){}
      if( i>1 ){
        /* Parameters of the form #NNN (where NNN is a number) are used
        ** internally by sqlite3NestedParse.  */
        *tokenType = TK_REGISTER;
        return i;
      }
      /* Fall through into the next case if the '#' is not followed by
      ** a digit. Try to match #AAAA where AAAA is a parameter name. */
    }
#ifndef SQLITE_OMIT_TCL_VARIABLE
    case '$':
#endif
    case '@':  /* For compatibility with MS SQL Server */

    case ':': {
      int n = 0;
      testcase( z[0]=='$' );  testcase( z[0]=='@' );  testcase( z[0]==':' );

      *tokenType = TK_VARIABLE;
      for(i=1; (c=z[i])!=0; i++){
        if( IdChar(c) ){
          n++;
#ifndef SQLITE_OMIT_TCL_VARIABLE
        }else if( c=='(' && n>0 ){
          do{
................................................................................
    /* If the pParse->declareVtab flag is set, do not delete any table 
    ** structure built up in pParse->pNewTable. The calling code (see vtab.c)
    ** will take responsibility for freeing the Table structure.
    */
    sqlite3DeleteTable(db, pParse->pNewTable);
  }


  sqlite3DeleteTrigger(db, pParse->pNewTrigger);
  for(i=pParse->nzVar-1; i>=0; i--) sqlite3DbFree(db, pParse->azVar[i]);
  sqlite3DbFree(db, pParse->azVar);
  while( pParse->pAinc ){
    AutoincInfo *p = pParse->pAinc;
    pParse->pAinc = p->pNext;
    sqlite3DbFree(db, p);
................................................................................
      db->lookaside.pFree = p;
      p = (LookasideSlot*)&((u8*)p)[sz];
    }
    db->lookaside.pEnd = p;
    db->lookaside.bEnabled = 1;
    db->lookaside.bMalloced = pBuf==0 ?1:0;
  }else{

    db->lookaside.pEnd = 0;
    db->lookaside.bEnabled = 0;
    db->lookaside.bMalloced = 0;
  }
  return SQLITE_OK;
}

/*
................................................................................
    }
    sqlite3DbFree(db, pMod);
  }
  sqlite3HashClear(&db->aModule);
#endif

  sqlite3Error(db, SQLITE_OK, 0); /* Deallocates any cached error strings. */
  if( db->pErr ){
    sqlite3ValueFree(db->pErr);
  }
  sqlite3CloseExtensions(db);

  db->magic = SQLITE_MAGIC_ERROR;

  /* The temp-database schema is allocated differently from the other schema
  ** objects (using sqliteMalloc() directly, instead of sqlite3BtreeSchema()).
  ** So it needs to be freed here. Todo: Why not roll the temp schema into
................................................................................
  }
}

/*
** Return a static string containing the name corresponding to the error code
** specified in the argument.
*/
#if defined(SQLITE_DEBUG) || defined(SQLITE_TEST) || \
    defined(SQLITE_DEBUG_OS_TRACE)
SQLITE_PRIVATE const char *sqlite3ErrName(int rc){
  const char *zName = 0;
  int i, origRc = rc;
  for(i=0; i<2 && zName==0; i++, rc &= 0xff){
    switch( rc ){
      case SQLITE_OK:                 zName = "SQLITE_OK";                break;
      case SQLITE_ERROR:              zName = "SQLITE_ERROR";             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_INTERRUPT:          zName = "SQLITE_INTERRUPT";         break;
      case SQLITE_IOERR:              zName = "SQLITE_IOERR";             break;
      case SQLITE_IOERR_READ:         zName = "SQLITE_IOERR_READ";        break;
      case SQLITE_IOERR_SHORT_READ:   zName = "SQLITE_IOERR_SHORT_READ";  break;
      case SQLITE_IOERR_WRITE:        zName = "SQLITE_IOERR_WRITE";       break;
      case SQLITE_IOERR_FSYNC:        zName = "SQLITE_IOERR_FSYNC";       break;
      case SQLITE_IOERR_DIR_FSYNC:    zName = "SQLITE_IOERR_DIR_FSYNC";   break;
................................................................................
  void (*xFunc)(sqlite3_context*,int,sqlite3_value **),
  void (*xStep)(sqlite3_context*,int,sqlite3_value **),
  void (*xFinal)(sqlite3_context*),
  FuncDestructor *pDestructor
){
  FuncDef *p;
  int nName;


  assert( sqlite3_mutex_held(db->mutex) );
  if( zFunctionName==0 ||
      (xFunc && (xFinal || xStep)) || 
      (!xFunc && (xFinal && !xStep)) ||
      (!xFunc && (!xFinal && xStep)) ||
      (nArg<-1 || nArg>SQLITE_MAX_FUNCTION_ARG) ||
      (255<(nName = sqlite3Strlen30( zFunctionName))) ){
    return SQLITE_MISUSE_BKPT;
  }




  
#ifndef SQLITE_OMIT_UTF16
  /* If SQLITE_UTF16 is specified as the encoding type, transform this
  ** to one of SQLITE_UTF16LE or SQLITE_UTF16BE using the
  ** SQLITE_UTF16NATIVE macro. SQLITE_UTF16 is not used internally.
  **
  ** If SQLITE_ANY is specified, add three versions of the function
  ** to the hash table.
  */
  if( enc==SQLITE_UTF16 ){
    enc = SQLITE_UTF16NATIVE;
  }else if( enc==SQLITE_ANY ){
    int rc;
    rc = sqlite3CreateFunc(db, zFunctionName, nArg, SQLITE_UTF8,
         pUserData, xFunc, xStep, xFinal, pDestructor);
    if( rc==SQLITE_OK ){
      rc = sqlite3CreateFunc(db, zFunctionName, nArg, SQLITE_UTF16LE,
          pUserData, xFunc, xStep, xFinal, pDestructor);
    }
    if( rc!=SQLITE_OK ){
      return rc;
    }
    enc = SQLITE_UTF16BE;
  }
................................................................................
  ** being replaced invoke the destructor function here. */
  functionDestroy(db, p);

  if( pDestructor ){
    pDestructor->nRef++;
  }
  p->pDestructor = pDestructor;
  p->funcFlags &= SQLITE_FUNC_ENCMASK;

  p->xFunc = xFunc;
  p->xStep = xStep;
  p->xFinalize = xFinal;
  p->pUserData = pUserData;
  p->nArg = (u16)nArg;
  return SQLITE_OK;
}
................................................................................
  if( !sqlite3SafetyCheckSickOrOk(db) ){
    return sqlite3ErrStr(SQLITE_MISUSE_BKPT);
  }
  sqlite3_mutex_enter(db->mutex);
  if( db->mallocFailed ){
    z = sqlite3ErrStr(SQLITE_NOMEM);
  }else{

    z = (char*)sqlite3_value_text(db->pErr);
    assert( !db->mallocFailed );
    if( z==0 ){
      z = sqlite3ErrStr(db->errCode);
    }
  }
  sqlite3_mutex_leave(db->mutex);
................................................................................
  }
  sqlite3_mutex_enter(db->mutex);
  if( db->mallocFailed ){
    z = (void *)outOfMem;
  }else{
    z = sqlite3_value_text16(db->pErr);
    if( z==0 ){
      sqlite3ValueSetStr(db->pErr, -1, sqlite3ErrStr(db->errCode),
           SQLITE_UTF8, SQLITE_STATIC);
      z = sqlite3_value_text16(db->pErr);
    }
    /* A malloc() may have failed within the call to sqlite3_value_text16()
    ** above. If this is the case, then the db->mallocFailed flag needs to
    ** be cleared before returning. Do this directly, instead of via
    ** sqlite3ApiExit(), to avoid setting the database handle error message.
    */
................................................................................

#ifdef SQLITE_ENABLE_RTREE
  if( !db->mallocFailed && rc==SQLITE_OK){
    rc = sqlite3RtreeInit(db);
  }
#endif

  sqlite3Error(db, rc, 0);

  /* -DSQLITE_DEFAULT_LOCKING_MODE=1 makes EXCLUSIVE the default locking
  ** mode.  -DSQLITE_DEFAULT_LOCKING_MODE=0 make NORMAL the default locking
  ** mode.  Doing nothing at all also makes NORMAL the default.
  */
#ifdef SQLITE_DEFAULT_LOCKING_MODE
  db->dfltLockMode = SQLITE_DEFAULT_LOCKING_MODE;
  sqlite3PagerLockingMode(sqlite3BtreePager(db->aDb[0].pBt),
                          SQLITE_DEFAULT_LOCKING_MODE);
#endif



  /* Enable the lookaside-malloc subsystem */
  setupLookaside(db, 0, sqlite3GlobalConfig.szLookaside,
                        sqlite3GlobalConfig.nLookaside);

  sqlite3_wal_autocheckpoint(db, SQLITE_DEFAULT_WAL_AUTOCHECKPOINT);

................................................................................
  int argc,                       /* Number of elements in argv array */
  const char * const *argv,       /* xCreate/xConnect argument array */
  sqlite3_vtab **ppVtab,          /* OUT: New sqlite3_vtab object */
  char **pzErr                    /* OUT: sqlite3_malloc'd error message */
){
  return fts3InitVtab(1, db, pAux, argc, argv, ppVtab, pzErr);
}














/* 
** Implementation of the xBestIndex method for FTS3 tables. There
** are three possible strategies, in order of preference:
**
**   1. Direct lookup by rowid or docid. 
**   2. Full-text search using a MATCH operator on a non-docid column.
................................................................................
  ** strategy is possible.
  */
  pInfo->idxNum = FTS3_FULLSCAN_SEARCH;
  pInfo->estimatedCost = 5000000;
  for(i=0; i<pInfo->nConstraint; i++){
    int bDocid;                 /* True if this constraint is on docid */
    struct sqlite3_index_constraint *pCons = &pInfo->aConstraint[i];
    if( pCons->usable==0 ) continue;














    bDocid = (pCons->iColumn<0 || pCons->iColumn==p->nColumn+1);

    /* A direct lookup on the rowid or docid column. Assign a cost of 1.0. */
    if( iCons<0 && pCons->op==SQLITE_INDEX_CONSTRAINT_EQ && bDocid ){
      pInfo->idxNum = FTS3_DOCID_SEARCH;
      pInfo->estimatedCost = 1.0;
................................................................................
  if( z[0]=='y' && hasVowel(z+1) ){
    z[0] = 'i';
  }

  /* Step 2 */
  switch( z[1] ){
   case 'a':
     stem(&z, "lanoita", "ate", m_gt_0) ||
     stem(&z, "lanoit", "tion", m_gt_0);

     break;
   case 'c':
     stem(&z, "icne", "ence", m_gt_0) ||
     stem(&z, "icna", "ance", m_gt_0);

     break;
   case 'e':
     stem(&z, "rezi", "ize", m_gt_0);
     break;
   case 'g':
     stem(&z, "igol", "log", m_gt_0);
     break;
   case 'l':
     stem(&z, "ilb", "ble", m_gt_0) ||
     stem(&z, "illa", "al", m_gt_0) ||
     stem(&z, "iltne", "ent", m_gt_0) ||
     stem(&z, "ile", "e", m_gt_0) ||

     stem(&z, "ilsuo", "ous", m_gt_0);

     break;
   case 'o':
     stem(&z, "noitazi", "ize", m_gt_0) ||
     stem(&z, "noita", "ate", m_gt_0) ||

     stem(&z, "rota", "ate", m_gt_0);

     break;
   case 's':
     stem(&z, "msila", "al", m_gt_0) ||
     stem(&z, "ssenevi", "ive", m_gt_0) ||
     stem(&z, "ssenluf", "ful", m_gt_0) ||

     stem(&z, "ssensuo", "ous", m_gt_0);

     break;
   case 't':
     stem(&z, "itila", "al", m_gt_0) ||
     stem(&z, "itivi", "ive", m_gt_0) ||

     stem(&z, "itilib", "ble", m_gt_0);

     break;
  }

  /* Step 3 */
  switch( z[0] ){
   case 'e':
     stem(&z, "etaci", "ic", m_gt_0) ||
     stem(&z, "evita", "", m_gt_0)   ||

     stem(&z, "ezila", "al", m_gt_0);

     break;
   case 'i':
     stem(&z, "itici", "ic", m_gt_0);
     break;
   case 'l':
     stem(&z, "laci", "ic", m_gt_0) ||
     stem(&z, "luf", "", m_gt_0);

     break;
   case 's':
     stem(&z, "ssen", "", m_gt_0);
     break;
  }

  /* Step 4 */
................................................................................
   case 'n':
     if( z[0]=='t' ){
       if( z[2]=='a' ){
         if( m_gt_1(z+3) ){
           z += 3;
         }
       }else if( z[2]=='e' ){
         stem(&z, "tneme", "", m_gt_1) ||
         stem(&z, "tnem", "", m_gt_1) ||

         stem(&z, "tne", "", m_gt_1);

       }
     }
     break;
   case 'o':
     if( z[0]=='u' ){
       if( m_gt_1(z+2) ){
         z += 2;
................................................................................
     break;
   case 's':
     if( z[0]=='m' && z[2]=='i' && m_gt_1(z+3) ){
       z += 3;
     }
     break;
   case 't':
     stem(&z, "eta", "", m_gt_1) ||
     stem(&z, "iti", "", m_gt_1);

     break;
   case 'u':
     if( z[0]=='s' && z[2]=='o' && m_gt_1(z+3) ){
       z += 3;
     }
     break;
   case 'v':

/******************************************************************************
** This file is an amalgamation of many separate C source files from SQLite
** version 3.8.3.  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
................................................................................
** 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        "3.8.3"
#define SQLITE_VERSION_NUMBER 3008003
#define SQLITE_SOURCE_ID      "2014-01-17 20:36:17 eecc325afd72e37d7d565787c8cea68aad6d7a5c"

/*
** 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_CANTOPEN_ISDIR          (SQLITE_CANTOPEN | (2<<8))
#define SQLITE_CANTOPEN_FULLPATH       (SQLITE_CANTOPEN | (3<<8))
#define SQLITE_CANTOPEN_CONVPATH       (SQLITE_CANTOPEN | (4<<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_READONLY_DBMOVED        (SQLITE_READONLY | (4<<8))
#define SQLITE_ABORT_ROLLBACK          (SQLITE_ABORT | (2<<8))
#define SQLITE_CONSTRAINT_CHECK        (SQLITE_CONSTRAINT | (1<<8))
#define SQLITE_CONSTRAINT_COMMITHOOK   (SQLITE_CONSTRAINT | (2<<8))
#define SQLITE_CONSTRAINT_FOREIGNKEY   (SQLITE_CONSTRAINT | (3<<8))
#define SQLITE_CONSTRAINT_FUNCTION     (SQLITE_CONSTRAINT | (4<<8))
#define SQLITE_CONSTRAINT_NOTNULL      (SQLITE_CONSTRAINT | (5<<8))
#define SQLITE_CONSTRAINT_PRIMARYKEY   (SQLITE_CONSTRAINT | (6<<8))
................................................................................
** first then the size of the file is extended, never the other
** way around.  The SQLITE_IOCAP_SEQUENTIAL property means that
** information is written to disk in the same order as calls
** to xWrite().  The SQLITE_IOCAP_POWERSAFE_OVERWRITE property means that
** after reboot following a crash or power loss, the only bytes in a
** file that were written at the application level might have changed
** and that adjacent bytes, even bytes within the same sector are
** guaranteed to be unchanged.  The SQLITE_IOCAP_UNDELETABLE_WHEN_OPEN
** flag indicate that a file cannot be deleted when open.
*/
#define SQLITE_IOCAP_ATOMIC                 0x00000001
#define SQLITE_IOCAP_ATOMIC512              0x00000002
#define SQLITE_IOCAP_ATOMIC1K               0x00000004
#define SQLITE_IOCAP_ATOMIC2K               0x00000008
#define SQLITE_IOCAP_ATOMIC4K               0x00000010
#define SQLITE_IOCAP_ATOMIC8K               0x00000020
................................................................................
** <li>[[SQLITE_FCNTL_FILE_POINTER]]
** The [SQLITE_FCNTL_FILE_POINTER] opcode is used to obtain a pointer
** to the [sqlite3_file] object associated with a particular database
** connection.  See the [sqlite3_file_control()] documentation for
** additional information.
**
** <li>[[SQLITE_FCNTL_SYNC_OMITTED]]
** No longer in use.
**
** <li>[[SQLITE_FCNTL_SYNC]]
** The [SQLITE_FCNTL_SYNC] opcode is generated internally by SQLite and



** sent to the VFS immediately before the xSync method is invoked on a
** database file descriptor. Or, if the xSync method is not invoked 
** because the user has configured SQLite with 
** [PRAGMA synchronous | PRAGMA synchronous=OFF] it is invoked in place 
** of the xSync method. In most cases, the pointer argument passed with
** this file-control is NULL. However, if the database file is being synced
** as part of a multi-database commit, the argument points to a nul-terminated
** string containing the transactions master-journal file name. VFSes that 
** do not need this signal should silently ignore this opcode. Applications 
** should not call [sqlite3_file_control()] with this opcode as doing so may 
** disrupt the operation of the specialized VFSes that do require it.  

**
** <li>[[SQLITE_FCNTL_COMMIT_PHASETWO]]
** The [SQLITE_FCNTL_COMMIT_PHASETWO] opcode is generated internally by SQLite
** and sent to the VFS after a transaction has been committed immediately
** but before the database is unlocked. VFSes that do not need this signal
** should silently ignore this opcode. Applications should not call
** [sqlite3_file_control()] with this opcode as doing so may disrupt the 
** operation of the specialized VFSes that do require it.  
**
** <li>[[SQLITE_FCNTL_WIN32_AV_RETRY]]
** ^The [SQLITE_FCNTL_WIN32_AV_RETRY] opcode is used to configure automatic
** retry counts and intervals for certain disk I/O operations for the
** windows [VFS] in order to provide robustness in the presence of
** anti-virus programs.  By default, the windows VFS will retry file read,
** file write, and file delete operations up to 10 times, with a delay
................................................................................
** The [SQLITE_FCNTL_TRACE] file control provides advisory information
** to the VFS about what the higher layers of the SQLite stack are doing.
** This file control is used by some VFS activity tracing [shims].
** The argument is a zero-terminated string.  Higher layers in the
** SQLite stack may generate instances of this file control if
** the [SQLITE_USE_FCNTL_TRACE] compile-time option is enabled.
**
** <li>[[SQLITE_FCNTL_HAS_MOVED]]
** The [SQLITE_FCNTL_HAS_MOVED] file control interprets its argument as a
** pointer to an integer and it writes a boolean into that integer depending
** on whether or not the file has been renamed, moved, or deleted since it
** was first opened.
**
** </ul>
*/
#define SQLITE_FCNTL_LOCKSTATE               1
#define SQLITE_GET_LOCKPROXYFILE             2
#define SQLITE_SET_LOCKPROXYFILE             3
#define SQLITE_LAST_ERRNO                    4
#define SQLITE_FCNTL_SIZE_HINT               5
................................................................................
#define SQLITE_FCNTL_VFSNAME                12
#define SQLITE_FCNTL_POWERSAFE_OVERWRITE    13
#define SQLITE_FCNTL_PRAGMA                 14
#define SQLITE_FCNTL_BUSYHANDLER            15
#define SQLITE_FCNTL_TEMPFILENAME           16
#define SQLITE_FCNTL_MMAP_SIZE              18
#define SQLITE_FCNTL_TRACE                  19
#define SQLITE_FCNTL_HAS_MOVED              20
#define SQLITE_FCNTL_SYNC                   21
#define SQLITE_FCNTL_COMMIT_PHASETWO        22

/*
** CAPI3REF: Mutex Handle
**
** The mutex module within SQLite defines [sqlite3_mutex] to be an
** abstract type for a mutex object.  The SQLite core never looks
** at the internal representation of an [sqlite3_mutex].  It only
................................................................................
#define SQLITE_REINDEX              27   /* Index Name      NULL            */
#define SQLITE_ANALYZE              28   /* Table Name      NULL            */
#define SQLITE_CREATE_VTABLE        29   /* Table Name      Module Name     */
#define SQLITE_DROP_VTABLE          30   /* Table Name      Module Name     */
#define SQLITE_FUNCTION             31   /* NULL            Function Name   */
#define SQLITE_SAVEPOINT            32   /* Operation       Savepoint Name  */
#define SQLITE_COPY                  0   /* No longer used */
#define SQLITE_RECURSIVE            33   /* NULL            NULL            */

/*
** CAPI3REF: Tracing And Profiling Functions
**
** These routines register callback functions that can be used for
** tracing and profiling the execution of SQL statements.
**
................................................................................
** aggregate may take any number of arguments between 0 and the limit
** set by [sqlite3_limit]([SQLITE_LIMIT_FUNCTION_ARG]).  If the third
** parameter is less than -1 or greater than 127 then the behavior is
** undefined.
**
** ^The fourth parameter, eTextRep, specifies what
** [SQLITE_UTF8 | text encoding] this SQL function prefers for
** its parameters.  The application should set this parameter to
** [SQLITE_UTF16LE] if the function implementation invokes 
** [sqlite3_value_text16le()] on an input, or [SQLITE_UTF16BE] if the
** implementation invokes [sqlite3_value_text16be()] on an input, or
** [SQLITE_UTF16] if [sqlite3_value_text16()] is used, or [SQLITE_UTF8]
** otherwise.  ^The same SQL function may be registered multiple times using
** different preferred text encodings, with different implementations for
** each encoding.
** ^When multiple implementations of the same function are available, SQLite
** will pick the one that involves the least amount of data conversion.


**
** ^The fourth parameter may optionally be ORed with [SQLITE_DETERMINISTIC]
** to signal that the function will always return the same result given
** the same inputs within a single SQL statement.  Most SQL functions are
** deterministic.  The built-in [random()] SQL function is an example of a
** function that is not deterministic.  The SQLite query planner is able to
** perform additional optimizations on deterministic functions, so use
** of the [SQLITE_DETERMINISTIC] flag is recommended where possible.
**
** ^(The fifth parameter is an arbitrary pointer.  The implementation of the
** function can gain access to this pointer using [sqlite3_user_data()].)^
**
** ^The sixth, seventh and eighth parameters, xFunc, xStep and xFinal, are
** pointers to C-language functions that implement the SQL function or
** aggregate. ^A scalar SQL function requires an implementation of the xFunc
................................................................................
** These constant define integer codes that represent the various
** text encodings supported by SQLite.
*/
#define SQLITE_UTF8           1
#define SQLITE_UTF16LE        2
#define SQLITE_UTF16BE        3
#define SQLITE_UTF16          4    /* Use native byte order */
#define SQLITE_ANY            5    /* Deprecated */
#define SQLITE_UTF16_ALIGNED  8    /* sqlite3_create_collation only */

/*
** CAPI3REF: Function Flags
**
** These constants may be ORed together with the 
** [SQLITE_UTF8 | preferred text encoding] as the fourth argument
** to [sqlite3_create_function()], [sqlite3_create_function16()], or
** [sqlite3_create_function_v2()].
*/
#define SQLITE_DETERMINISTIC    0x800

/*
** CAPI3REF: Deprecated Functions
** DEPRECATED
**
** These functions are [deprecated].  In order to maintain
** backwards compatibility with older code, these functions continue 
** to be supported.  However, new applications should avoid
................................................................................

#endif /* _SQLITE_HASH_H_ */

/************** End of hash.h ************************************************/
/************** Continuing where we left off in sqliteInt.h ******************/
/************** Include parse.h in the middle of sqliteInt.h *****************/
/************** Begin file parse.h *******************************************/
#define TK_SEMI                             1
#define TK_EXPLAIN                          2
#define TK_QUERY                            3
#define TK_PLAN                             4
#define TK_BEGIN                            5
#define TK_TRANSACTION                      6
#define TK_DEFERRED                         7
#define TK_IMMEDIATE                        8
#define TK_EXCLUSIVE                        9
#define TK_COMMIT                          10
#define TK_END                             11
#define TK_ROLLBACK                        12
#define TK_SAVEPOINT                       13
#define TK_RELEASE                         14
#define TK_TO                              15
#define TK_TABLE                           16
#define TK_CREATE                          17
#define TK_IF                              18
#define TK_NOT                             19
#define TK_EXISTS                          20
#define TK_TEMP                            21
#define TK_LP                              22
#define TK_RP                              23
#define TK_AS                              24
#define TK_WITHOUT                         25
#define TK_COMMA                           26
#define TK_ID                              27
#define TK_INDEXED                         28
#define TK_ABORT                           29
#define TK_ACTION                          30
#define TK_AFTER                           31
#define TK_ANALYZE                         32
#define TK_ASC                             33
#define TK_ATTACH                          34
#define TK_BEFORE                          35
#define TK_BY                              36
#define TK_CASCADE                         37
#define TK_CAST                            38
#define TK_COLUMNKW                        39
#define TK_CONFLICT                        40
#define TK_DATABASE                        41
#define TK_DESC                            42
#define TK_DETACH                          43
#define TK_EACH                            44
#define TK_FAIL                            45
#define TK_FOR                             46
#define TK_IGNORE                          47
#define TK_INITIALLY                       48
#define TK_INSTEAD                         49
#define TK_LIKE_KW                         50
#define TK_MATCH                           51
#define TK_NO                              52
#define TK_KEY                             53
#define TK_OF                              54
#define TK_OFFSET                          55
#define TK_PRAGMA                          56
#define TK_RAISE                           57
#define TK_RECURSIVE                       58
#define TK_REPLACE                         59
#define TK_RESTRICT                        60
#define TK_ROW                             61
#define TK_TRIGGER                         62
#define TK_VACUUM                          63
#define TK_VIEW                            64
#define TK_VIRTUAL                         65
#define TK_WITH                            66
#define TK_REINDEX                         67
#define TK_RENAME                          68
#define TK_CTIME_KW                        69
#define TK_ANY                             70
#define TK_OR                              71
#define TK_AND                             72
#define TK_IS                              73
#define TK_BETWEEN                         74
#define TK_IN                              75
#define TK_ISNULL                          76
#define TK_NOTNULL                         77
#define TK_NE                              78
#define TK_EQ                              79
#define TK_GT                              80
#define TK_LE                              81
#define TK_LT                              82
#define TK_GE                              83
#define TK_ESCAPE                          84
#define TK_BITAND                          85
#define TK_BITOR                           86
#define TK_LSHIFT                          87
#define TK_RSHIFT                          88
#define TK_PLUS                            89
#define TK_MINUS                           90
#define TK_STAR                            91
#define TK_SLASH                           92
#define TK_REM                             93
#define TK_CONCAT                          94
#define TK_COLLATE                         95
#define TK_BITNOT                          96
#define TK_STRING                          97
#define TK_JOIN_KW                         98
#define TK_CONSTRAINT                      99
#define TK_DEFAULT                        100
#define TK_NULL                           101
#define TK_PRIMARY                        102
#define TK_UNIQUE                         103
#define TK_CHECK                          104
#define TK_REFERENCES                     105
#define TK_AUTOINCR                       106
#define TK_ON                             107
#define TK_INSERT                         108
#define TK_DELETE                         109
#define TK_UPDATE                         110
#define TK_SET                            111
#define TK_DEFERRABLE                     112
#define TK_FOREIGN                        113
#define TK_DROP                           114
#define TK_UNION                          115
#define TK_ALL                            116
#define TK_EXCEPT                         117
#define TK_INTERSECT                      118
#define TK_SELECT                         119
#define TK_VALUES                         120
#define TK_DISTINCT                       121
#define TK_DOT                            122
#define TK_FROM                           123
#define TK_JOIN                           124
#define TK_USING                          125
#define TK_ORDER                          126
#define TK_GROUP                          127
#define TK_HAVING                         128
#define TK_LIMIT                          129
#define TK_WHERE                          130
#define TK_INTO                           131

#define TK_INTEGER                        132
#define TK_FLOAT                          133
#define TK_BLOB                           134

#define TK_VARIABLE                       135
#define TK_CASE                           136
#define TK_WHEN                           137
#define TK_THEN                           138
#define TK_ELSE                           139
#define TK_INDEX                          140
#define TK_ALTER                          141
#define TK_ADD                            142
#define TK_TO_TEXT                        143
#define TK_TO_BLOB                        144
#define TK_TO_NUMERIC                     145
#define TK_TO_INT                         146
#define TK_TO_REAL                        147
#define TK_ISNOT                          148
#define TK_END_OF_FILE                    149
#define TK_ILLEGAL                        150
#define TK_SPACE                          151
#define TK_UNCLOSED_STRING                152
#define TK_FUNCTION                       153
#define TK_COLUMN                         154
#define TK_AGG_FUNCTION                   155
#define TK_AGG_COLUMN                     156
#define TK_UMINUS                         157
#define TK_UPLUS                          158
#define TK_REGISTER                       159

/************** End of parse.h ***********************************************/
/************** Continuing where we left off in sqliteInt.h ******************/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <assert.h>
................................................................................
typedef struct KeyClass KeyClass;
typedef struct KeyInfo KeyInfo;
typedef struct Lookaside Lookaside;
typedef struct LookasideSlot LookasideSlot;
typedef struct Module Module;
typedef struct NameContext NameContext;
typedef struct Parse Parse;
typedef struct PrintfArguments PrintfArguments;
typedef struct RowSet RowSet;
typedef struct Savepoint Savepoint;
typedef struct Select Select;
typedef struct SelectDest SelectDest;
typedef struct SrcList SrcList;
typedef struct StrAccum StrAccum;
typedef struct Table Table;
................................................................................
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;
typedef struct With With;

/*
** 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 OP_Integer        23 /* synopsis: r[P2]=P1                         */
#define OP_Int64          24 /* synopsis: r[P2]=P4                         */
#define OP_String         25 /* synopsis: r[P2]='P4' (len=P1)              */
#define OP_Null           26 /* synopsis: r[P2..P3]=NULL                   */
#define OP_Blob           27 /* synopsis: r[P2]=P4 (len=P1)                */
#define OP_Variable       28 /* synopsis: r[P2]=parameter(P1,P4)           */
#define OP_Move           29 /* synopsis: r[P2@P3]=r[P1@P3]                */
#define OP_Copy           30 /* synopsis: r[P2@P3+1]=r[P1@P3+1]            */
#define OP_SCopy          31 /* synopsis: r[P2]=r[P1]                      */
#define OP_ResultRow      32 /* synopsis: output=r[P1@P2]                  */
#define OP_CollSeq        33
#define OP_AddImm         34 /* synopsis: r[P1]=r[P1]+P2                   */
#define OP_MustBeInt      35
#define OP_RealAffinity   36
#define OP_Permutation    37
................................................................................
#define OP_ReadCookie     47
#define OP_SetCookie      48
#define OP_VerifyCookie   49
#define OP_OpenRead       50 /* synopsis: root=P2 iDb=P3                   */
#define OP_OpenWrite      51 /* synopsis: root=P2 iDb=P3                   */
#define OP_OpenAutoindex  52 /* synopsis: nColumn=P2                       */
#define OP_OpenEphemeral  53 /* synopsis: nColumn=P2                       */
#define OP_SwapCursors    54
#define OP_SorterOpen     55
#define OP_OpenPseudo     56 /* synopsis: content in r[P2@P3]              */
#define OP_Close          57
#define OP_SeekLt         58 /* synopsis: key=r[P3@P4]                     */
#define OP_SeekLe         59 /* synopsis: key=r[P3@P4]                     */
#define OP_SeekGe         60 /* synopsis: key=r[P3@P4]                     */
#define OP_SeekGt         61 /* synopsis: key=r[P3@P4]                     */
#define OP_Seek           62 /* synopsis: intkey=r[P2]                     */
#define OP_NoConflict     63 /* synopsis: key=r[P3@P4]                     */
#define OP_NotFound       64 /* synopsis: key=r[P3@P4]                     */
#define OP_Found          65 /* synopsis: key=r[P3@P4]                     */
#define OP_NotExists      66 /* synopsis: intkey=r[P3]                     */
#define OP_Sequence       67 /* synopsis: r[P2]=rowid                      */
#define OP_NewRowid       68 /* synopsis: r[P2]=rowid                      */
#define OP_Insert         69 /* synopsis: intkey=r[P3] data=r[P2]          */
#define OP_InsertInt      70 /* synopsis: intkey=P3 data=r[P2]             */
#define OP_Or             71 /* same as TK_OR, synopsis: r[P3]=(r[P1] || r[P2]) */
#define OP_And            72 /* same as TK_AND, synopsis: r[P3]=(r[P1] && r[P2]) */

#define OP_Delete         73
#define OP_ResetCount     74
#define OP_SorterCompare  75 /* synopsis: if key(P1)!=rtrim(r[P3],P4) goto P2 */
#define OP_IsNull         76 /* same as TK_ISNULL, synopsis: if r[P1]==NULL goto P2 */
#define OP_NotNull        77 /* same as TK_NOTNULL, synopsis: if r[P1]!=NULL goto P2 */
#define OP_Ne             78 /* same as TK_NE, synopsis: if r[P1]!=r[P3] goto P2 */
#define OP_Eq             79 /* same as TK_EQ, synopsis: if r[P1]==r[P3] goto P2 */
#define OP_Gt             80 /* same as TK_GT, synopsis: if r[P1]>r[P3] goto P2 */
#define OP_Le             81 /* same as TK_LE, synopsis: if r[P1]<=r[P3] goto P2 */
#define OP_Lt             82 /* same as TK_LT, synopsis: if r[P1]<r[P3] goto P2 */
#define OP_Ge             83 /* same as TK_GE, synopsis: if r[P1]>=r[P3] goto P2 */

#define OP_SorterData     84 /* synopsis: r[P2]=data                       */
#define OP_BitAnd         85 /* same as TK_BITAND, synopsis: r[P3]=r[P1]&r[P2] */
#define OP_BitOr          86 /* same as TK_BITOR, synopsis: r[P3]=r[P1]|r[P2] */
#define OP_ShiftLeft      87 /* same as TK_LSHIFT, synopsis: r[P3]=r[P2]<<r[P1] */
#define OP_ShiftRight     88 /* same as TK_RSHIFT, synopsis: r[P3]=r[P2]>>r[P1] */
#define OP_Add            89 /* same as TK_PLUS, synopsis: r[P3]=r[P1]+r[P2] */
#define OP_Subtract       90 /* same as TK_MINUS, synopsis: r[P3]=r[P2]-r[P1] */
#define OP_Multiply       91 /* same as TK_STAR, synopsis: r[P3]=r[P1]*r[P2] */
#define OP_Divide         92 /* same as TK_SLASH, synopsis: r[P3]=r[P2]/r[P1] */
#define OP_Remainder      93 /* same as TK_REM, synopsis: r[P3]=r[P2]%r[P1] */
#define OP_Concat         94 /* same as TK_CONCAT, synopsis: r[P3]=r[P2]+r[P1] */

#define OP_RowKey         95 /* synopsis: r[P2]=key                        */
#define OP_BitNot         96 /* same as TK_BITNOT, synopsis: r[P1]= ~r[P1] */
#define OP_String8        97 /* same as TK_STRING, synopsis: r[P2]='P4'    */

#define OP_RowData        98 /* synopsis: r[P2]=data                       */
#define OP_Rowid          99 /* synopsis: r[P2]=rowid                      */
#define OP_NullRow       100
#define OP_Last          101
#define OP_SorterSort    102
#define OP_Sort          103
#define OP_Rewind        104
#define OP_SorterInsert  105
#define OP_IdxInsert     106 /* synopsis: key=r[P2]                        */
#define OP_IdxDelete     107 /* synopsis: key=r[P2@P3]                     */
#define OP_IdxRowid      108 /* synopsis: r[P2]=rowid                      */
#define OP_IdxLT         109 /* synopsis: key=r[P3@P4]                     */
#define OP_IdxGE         110 /* synopsis: key=r[P3@P4]                     */
#define OP_Destroy       111
#define OP_Clear         112
#define OP_CreateIndex   113 /* synopsis: r[P2]=root iDb=P1                */
#define OP_CreateTable   114 /* synopsis: r[P2]=root iDb=P1                */
#define OP_ParseSchema   115
#define OP_LoadAnalysis  116
#define OP_DropTable     117
#define OP_DropIndex     118
#define OP_DropTrigger   119
#define OP_IntegrityCk   120
#define OP_RowSetAdd     121 /* synopsis: rowset(P1)=r[P2]                 */
#define OP_RowSetRead    122 /* synopsis: r[P3]=rowset(P1)                 */
#define OP_RowSetTest    123 /* synopsis: if r[P3] in rowset(P1) goto P2   */
#define OP_Program       124
#define OP_Param         125
#define OP_FkCounter     126 /* synopsis: fkctr[P1]+=P2                    */
#define OP_FkIfZero      127 /* synopsis: if fkctr[P1]==0 goto P2          */
#define OP_MemMax        128 /* synopsis: r[P1]=max(r[P1],r[P2])           */
#define OP_IfPos         129 /* synopsis: if r[P1]>0 goto P2               */
#define OP_IfNeg         130 /* synopsis: if r[P1]<0 goto P2               */
#define OP_IfZero        131 /* synopsis: r[P1]+=P3, if r[P1]==0 goto P2   */

#define OP_AggFinal      132 /* synopsis: accum=r[P1] N=P2                 */
#define OP_Real          133 /* same as TK_FLOAT, synopsis: r[P2]=P4       */
#define OP_IncrVacuum    134
#define OP_Expire        135
#define OP_TableLock     136 /* synopsis: iDb=P1 root=P2 write=P3          */
#define OP_VBegin        137
#define OP_VCreate       138
#define OP_VDestroy      139
#define OP_VOpen         140
#define OP_VColumn       141 /* synopsis: r[P3]=vcolumn(P2)                */
#define OP_VNext         142
#define OP_ToText        143 /* same as TK_TO_TEXT                         */
#define OP_ToBlob        144 /* same as TK_TO_BLOB                         */
#define OP_ToNumeric     145 /* same as TK_TO_NUMERIC                      */
#define OP_ToInt         146 /* same as TK_TO_INT                          */
#define OP_ToReal        147 /* same as TK_TO_REAL                         */
#define OP_VRename       148
#define OP_Pagecount     149
#define OP_MaxPgcnt      150
#define OP_Trace         151
#define OP_Noop          152
#define OP_Explain       153


/* Properties such as "out2" or "jump" that are specified in
** comments following the "case" for each opcode in the vdbe.c
** are encoded into bitvectors as follows:
*/
#define OPFLG_JUMP            0x0001  /* jump:  P2 holds jmp target */
................................................................................
/*   0 */ 0x00, 0x00, 0x00, 0x00, 0x00, 0x01, 0x01, 0x01,\
/*   8 */ 0x01, 0x01, 0x00, 0x00, 0x02, 0x00, 0x01, 0x00,\
/*  16 */ 0x01, 0x01, 0x04, 0x24, 0x04, 0x10, 0x00, 0x02,\
/*  24 */ 0x02, 0x02, 0x02, 0x02, 0x02, 0x00, 0x00, 0x20,\
/*  32 */ 0x00, 0x00, 0x04, 0x05, 0x04, 0x00, 0x00, 0x01,\
/*  40 */ 0x01, 0x05, 0x05, 0x00, 0x00, 0x00, 0x02, 0x02,\
/*  48 */ 0x10, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,\
/*  56 */ 0x00, 0x00, 0x11, 0x11, 0x11, 0x11, 0x08, 0x11,\
/*  64 */ 0x11, 0x11, 0x11, 0x02, 0x02, 0x00, 0x00, 0x4c,\
/*  72 */ 0x4c, 0x00, 0x00, 0x00, 0x05, 0x05, 0x15, 0x15,\
/*  80 */ 0x15, 0x15, 0x15, 0x15, 0x00, 0x4c, 0x4c, 0x4c,\
/*  88 */ 0x4c, 0x4c, 0x4c, 0x4c, 0x4c, 0x4c, 0x4c, 0x00,\
/*  96 */ 0x24, 0x02, 0x00, 0x02, 0x00, 0x01, 0x01, 0x01,\
/* 104 */ 0x01, 0x08, 0x08, 0x00, 0x02, 0x01, 0x01, 0x02,\
/* 112 */ 0x00, 0x02, 0x02, 0x00, 0x00, 0x00, 0x00, 0x00,\
/* 120 */ 0x00, 0x0c, 0x45, 0x15, 0x01, 0x02, 0x00, 0x01,\
/* 128 */ 0x08, 0x05, 0x05, 0x05, 0x00, 0x02, 0x01, 0x00,\
/* 136 */ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01, 0x04,\
/* 144 */ 0x04, 0x04, 0x04, 0x04, 0x00, 0x02, 0x02, 0x00,\
/* 152 */ 0x00, 0x00,}

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

/*
** Prototypes for the VDBE interface.  See comments on the implementation
** for a description of what each of these routines does.
*/
SQLITE_PRIVATE Vdbe *sqlite3VdbeCreate(Parse*);
SQLITE_PRIVATE int sqlite3VdbeAddOp0(Vdbe*,int);
SQLITE_PRIVATE int sqlite3VdbeAddOp1(Vdbe*,int,int);
SQLITE_PRIVATE int sqlite3VdbeAddOp2(Vdbe*,int,int,int);
SQLITE_PRIVATE int sqlite3VdbeAddOp3(Vdbe*,int,int,int,int);
SQLITE_PRIVATE int sqlite3VdbeAddOp4(Vdbe*,int,int,int,int,const char *zP4,int);
SQLITE_PRIVATE int sqlite3VdbeAddOp4Int(Vdbe*,int,int,int,int,int);
SQLITE_PRIVATE int sqlite3VdbeAddOpList(Vdbe*, int nOp, VdbeOpList const *aOp);
................................................................................
SQLITE_PRIVATE void sqlite3VdbeAddParseSchemaOp(Vdbe*,int,char*);
SQLITE_PRIVATE void sqlite3VdbeChangeP1(Vdbe*, u32 addr, int P1);
SQLITE_PRIVATE void sqlite3VdbeChangeP2(Vdbe*, u32 addr, int P2);
SQLITE_PRIVATE void sqlite3VdbeChangeP3(Vdbe*, u32 addr, int P3);
SQLITE_PRIVATE void sqlite3VdbeChangeP5(Vdbe*, u8 P5);
SQLITE_PRIVATE void sqlite3VdbeJumpHere(Vdbe*, int addr);
SQLITE_PRIVATE void sqlite3VdbeChangeToNoop(Vdbe*, int addr);
SQLITE_PRIVATE int sqlite3VdbeDeletePriorOpcode(Vdbe*, u8 op);
SQLITE_PRIVATE void sqlite3VdbeChangeP4(Vdbe*, int addr, const char *zP4, int N);
SQLITE_PRIVATE void sqlite3VdbeSetP4KeyInfo(Parse*, Index*);
SQLITE_PRIVATE void sqlite3VdbeUsesBtree(Vdbe*, int);
SQLITE_PRIVATE VdbeOp *sqlite3VdbeGetOp(Vdbe*, int);
SQLITE_PRIVATE int sqlite3VdbeMakeLabel(Vdbe*);
SQLITE_PRIVATE void sqlite3VdbeRunOnlyOnce(Vdbe*);
SQLITE_PRIVATE void sqlite3VdbeDelete(Vdbe*);
................................................................................

/* Functions used to obtain and release page references. */ 
SQLITE_PRIVATE int sqlite3PagerAcquire(Pager *pPager, Pgno pgno, DbPage **ppPage, int clrFlag);
#define sqlite3PagerGet(A,B,C) sqlite3PagerAcquire(A,B,C,0)
SQLITE_PRIVATE DbPage *sqlite3PagerLookup(Pager *pPager, Pgno pgno);
SQLITE_PRIVATE void sqlite3PagerRef(DbPage*);
SQLITE_PRIVATE void sqlite3PagerUnref(DbPage*);
SQLITE_PRIVATE void sqlite3PagerUnrefNotNull(DbPage*);

/* Operations on page references. */
SQLITE_PRIVATE int sqlite3PagerWrite(DbPage*);
SQLITE_PRIVATE void sqlite3PagerDontWrite(DbPage*);
SQLITE_PRIVATE int sqlite3PagerMovepage(Pager*,DbPage*,Pgno,int);
SQLITE_PRIVATE int sqlite3PagerPageRefcount(DbPage*);
SQLITE_PRIVATE void *sqlite3PagerGetData(DbPage *); 
................................................................................
SQLITE_PRIVATE void *sqlite3PagerGetExtra(DbPage *); 

/* Functions used to manage pager transactions and savepoints. */
SQLITE_PRIVATE void sqlite3PagerPagecount(Pager*, int*);
SQLITE_PRIVATE int sqlite3PagerBegin(Pager*, int exFlag, int);
SQLITE_PRIVATE int sqlite3PagerCommitPhaseOne(Pager*,const char *zMaster, int);
SQLITE_PRIVATE int sqlite3PagerExclusiveLock(Pager*);
SQLITE_PRIVATE int sqlite3PagerSync(Pager *pPager, const char *zMaster);
SQLITE_PRIVATE int sqlite3PagerCommitPhaseTwo(Pager*);
SQLITE_PRIVATE int sqlite3PagerRollback(Pager*);
SQLITE_PRIVATE int sqlite3PagerOpenSavepoint(Pager *pPager, int n);
SQLITE_PRIVATE int sqlite3PagerSavepoint(Pager *pPager, int op, int iSavepoint);
SQLITE_PRIVATE int sqlite3PagerSharedLock(Pager *pPager);

#ifndef SQLITE_OMIT_WAL
................................................................................
** sqlite3_test_control(SQLITE_TESTCTRL_OPTIMIZATIONS,...) interface to
** selectively disable various optimizations.
*/
#define SQLITE_QueryFlattener 0x0001   /* Query flattening */
#define SQLITE_ColumnCache    0x0002   /* Column cache */
#define SQLITE_GroupByOrder   0x0004   /* GROUPBY cover of ORDERBY */
#define SQLITE_FactorOutConst 0x0008   /* Constant factoring */
/*                not used    0x0010   // Was: SQLITE_IdxRealAsInt */
#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 */
................................................................................
#endif
  Trigger *pTrigger;   /* List of triggers stored in pSchema */
  Schema *pSchema;     /* Schema that contains this table */
  Table *pNextZombie;  /* Next on the Parse.pZombieTab list */
};

/*
** Allowed values for Table.tabFlags.
*/
#define TF_Readonly        0x01    /* Read-only system table */
#define TF_Ephemeral       0x02    /* An ephemeral table */
#define TF_HasPrimaryKey   0x04    /* Table has a primary key */
#define TF_Autoincrement   0x08    /* Integer primary key is autoincrement */
#define TF_Virtual         0x10    /* Is a virtual table */
#define TF_WithoutRowid    0x20    /* No rowid used. PRIMARY KEY is the key */
#define TF_Recursive       0x40    /* Recursive reference within CTE */


/*
** Test to see whether or not a table is a virtual table.  This is
** done as a macro so that it will be optimized out when virtual
** table support is omitted from the build.
*/
................................................................................
  u8 directMode;          /* Direct rendering mode means take data directly
                          ** from source tables rather than from accumulators */
  u8 useSortingIdx;       /* In direct mode, reference the sorting index rather
                          ** than the source table */
  int sortingIdx;         /* Cursor number of the sorting index */
  int sortingIdxPTab;     /* Cursor number of pseudo-table */
  int nSortingColumn;     /* Number of columns in the sorting index */
  int mnReg, mxReg;       /* Range of registers allocated for aCol and aFunc */
  ExprList *pGroupBy;     /* The group by clause */
  struct AggInfo_col {    /* For each column used in source tables */
    Table *pTab;             /* Source table */
    int iTable;              /* Cursor number of the source table */
    int iColumn;             /* Column number within the source table */
    int iSorterColumn;       /* Column number in the sorting index */
    int iMem;                /* Memory location that acts as accumulator */
................................................................................
    Select *pSelect;  /* A SELECT statement used in place of a table name */
    int addrFillSub;  /* Address of subroutine to manifest a subquery */
    int regReturn;    /* Register holding return address of addrFillSub */
    u8 jointype;      /* Type of join between this able and the previous */
    unsigned notIndexed :1;    /* True if there is a NOT INDEXED clause */
    unsigned isCorrelated :1;  /* True if sub-query is correlated */
    unsigned viaCoroutine :1;  /* Implemented as a co-routine */
    unsigned isRecursive :1;   /* True for recursive reference in WITH */
#ifndef SQLITE_OMIT_EXPLAIN
    u8 iSelectId;     /* If pSelect!=0, the id of the sub-select in EQP */
#endif
    int iCursor;      /* The VDBE cursor number used to access this table */
    Expr *pOn;        /* The ON clause of a join */
    IdList *pUsing;   /* The USING clause of a join */
    Bitmask colUsed;  /* Bit N (1<<N) set if column N of pTab is used */
................................................................................
  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 */
  Select *pRightmost;    /* Right-most select in a compound select statement */
  Expr *pLimit;          /* LIMIT expression. NULL means not used. */
  Expr *pOffset;         /* OFFSET expression. NULL means not used. */
  With *pWith;           /* WITH clause attached to this select. Or NULL. */
};

/*
** Allowed values for Select.selFlags.  The "SF" prefix stands for
** "Select Flag".
*/
#define SF_Distinct        0x0001  /* Output should be DISTINCT */
................................................................................
#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() */
#define SF_Recursive       0x0800  /* The recursive part of a recursive CTE */


/*
** 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 */
................................................................................

#define SRT_Output       5  /* Output each row of result */
#define SRT_Mem          6  /* Store result in a memory cell */
#define SRT_Set          7  /* Store results as keys in an index */
#define SRT_Table        8  /* Store result as data with an automatic rowid */
#define SRT_EphemTab     9  /* Create transient tab and store like SRT_Table */
#define SRT_Coroutine   10  /* Generate a single row of result */
#define SRT_DistTable   11  /* Like SRT_TABLE, but unique results only */

/*
** An instance of this object describes where to put of the results of
** a SELECT statement.
*/
struct SelectDest {
  u8 eDest;         /* How to dispose of the results.  On of SRT_* above. */
................................................................................
  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 nOpAlloc;        /* Number of slots allocated for Vdbe.aOp[] */
  int nLabel;          /* Number of labels used */
  int *aLabel;         /* Space to hold the labels */
  int iFixedOp;        /* Never back out opcodes iFixedOp-1 or earlier */
  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 */
................................................................................
  Token sLastToken;         /* The last token parsed */
#ifndef SQLITE_OMIT_VIRTUALTABLE
  Token sArg;               /* Complete text of a module argument */
  Table **apVtabLock;       /* Pointer to virtual tables needing locking */
#endif
  Table *pZombieTab;        /* List of Table objects to delete after code gen */
  TriggerPrg *pTriggerPrg;  /* Linked list of coded triggers */
  With *pWith;              /* Current WITH clause, or NULL */
  u8 bFreeWith;             /* True if pWith should be freed with parser */
};

/*
** Return true if currently inside an sqlite3_declare_vtab() call.
*/
#ifdef SQLITE_OMIT_VIRTUALTABLE
  #define IN_DECLARE_VTAB 0
................................................................................
struct TriggerStep {
  u8 op;               /* One of TK_DELETE, TK_UPDATE, TK_INSERT, TK_SELECT */
  u8 orconf;           /* OE_Rollback etc. */
  Trigger *pTrig;      /* The trigger that this step is a part of */
  Select *pSelect;     /* SELECT statment or RHS of INSERT INTO .. SELECT ... */
  Token target;        /* Target table for DELETE, UPDATE, INSERT */
  Expr *pWhere;        /* The WHERE clause for DELETE or UPDATE steps */
  ExprList *pExprList; /* SET clause for UPDATE. */
  IdList *pIdList;     /* Column names for INSERT */
  TriggerStep *pNext;  /* Next in the link-list */
  TriggerStep *pLast;  /* Last element in link-list. Valid for 1st elem only */
};

/*
** The following structure contains information used by the sqliteFix...
................................................................................

/*
** Context pointer passed down through the tree-walk.
*/
struct Walker {
  int (*xExprCallback)(Walker*, Expr*);     /* Callback for expressions */
  int (*xSelectCallback)(Walker*,Select*);  /* Callback for SELECTs */
  void (*xSelectCallback2)(Walker*,Select*);/* Second callback for SELECTs */
  Parse *pParse;                            /* Parser context.  */
  int walkerDepth;                          /* Number of subqueries */

  union {                                   /* Extra data for callback */
    NameContext *pNC;                          /* Naming context */
    int i;                                     /* Integer value */
    SrcList *pSrcList;                         /* FROM clause */
    struct SrcCount *pSrcCount;                /* Counting column references */
  } u;
};
................................................................................
/*
** Return code from the parse-tree walking primitives and their
** callbacks.
*/
#define WRC_Continue    0   /* Continue down into children */
#define WRC_Prune       1   /* Omit children but continue walking siblings */
#define WRC_Abort       2   /* Abandon the tree walk */

/*
** An instance of this structure represents a set of one or more CTEs
** (common table expressions) created by a single WITH clause.
*/
struct With {
  int nCte;                       /* Number of CTEs in the WITH clause */
  With *pOuter;                   /* Containing WITH clause, or NULL */
  struct Cte {                    /* For each CTE in the WITH clause.... */
    char *zName;                    /* Name of this CTE */
    ExprList *pCols;                /* List of explicit column names, or NULL */
    Select *pSelect;                /* The definition of this CTE */
    const char *zErr;               /* Error message for circular references */
  } a[1];
};

/*
** Assuming zIn points to the first byte of a UTF-8 character,
** advance zIn to point to the first byte of the next UTF-8 character.
*/
#define SQLITE_SKIP_UTF8(zIn) {                        \
  if( (*(zIn++))>=0xc0 ){                              \
................................................................................

#ifndef SQLITE_OMIT_FLOATING_POINT
SQLITE_PRIVATE   int sqlite3IsNaN(double);
#else
# define sqlite3IsNaN(X)  0
#endif

/*
** An instance of the following structure holds information about SQL
** functions arguments that are the parameters to the printf() function.
*/
struct PrintfArguments {
  int nArg;                /* Total number of arguments */
  int nUsed;               /* Number of arguments used so far */
  sqlite3_value **apArg;   /* The argument values */
};

#define SQLITE_PRINTF_INTERNAL 0x01
#define SQLITE_PRINTF_SQLFUNC  0x02
SQLITE_PRIVATE void sqlite3VXPrintf(StrAccum*, u32, const char*, va_list);

SQLITE_PRIVATE void sqlite3XPrintf(StrAccum*, u32, const char*, ...);

SQLITE_PRIVATE char *sqlite3MPrintf(sqlite3*,const char*, ...);
SQLITE_PRIVATE char *sqlite3VMPrintf(sqlite3*,const char*, va_list);
SQLITE_PRIVATE char *sqlite3MAppendf(sqlite3*,char*,const char*,...);
#if defined(SQLITE_TEST) || defined(SQLITE_DEBUG)
SQLITE_PRIVATE   void sqlite3DebugPrintf(const char*, ...);
#endif
#if defined(SQLITE_TEST)
................................................................................
SQLITE_PRIVATE   void sqlite3AutoincrementBegin(Parse *pParse);
SQLITE_PRIVATE   void sqlite3AutoincrementEnd(Parse *pParse);
#else
# define sqlite3AutoincrementBegin(X)
# define sqlite3AutoincrementEnd(X)
#endif
SQLITE_PRIVATE int sqlite3CodeCoroutine(Parse*, Select*, SelectDest*);
SQLITE_PRIVATE void sqlite3Insert(Parse*, SrcList*, Select*, IdList*, int);
SQLITE_PRIVATE void *sqlite3ArrayAllocate(sqlite3*,void*,int,int*,int*);
SQLITE_PRIVATE IdList *sqlite3IdListAppend(sqlite3*, IdList*, Token*);
SQLITE_PRIVATE int sqlite3IdListIndex(IdList*,const char*);
SQLITE_PRIVATE SrcList *sqlite3SrcListEnlarge(sqlite3*, SrcList*, int, int);
SQLITE_PRIVATE SrcList *sqlite3SrcListAppend(sqlite3*, SrcList*, Token*, Token*);
SQLITE_PRIVATE SrcList *sqlite3SrcListAppendFromTerm(Parse*, SrcList*, Token*, Token*,
                                      Token*, Select*, Expr*, IdList*);
................................................................................
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*,Trigger*,int,int,int,i16,u8,u8,u8);
SQLITE_PRIVATE void sqlite3GenerateRowIndexDelete(Parse*, Table*, int, int, int*);
SQLITE_PRIVATE int sqlite3GenerateIndexKey(Parse*, Index*, int, int, int, int*,Index*,int);
SQLITE_PRIVATE void sqlite3GenerateConstraintChecks(Parse*,Table*,int*,int,int,int,int,
                                     u8,u8,int,int*);
SQLITE_PRIVATE void sqlite3CompleteInsertion(Parse*,Table*,int,int,int,int*,int,int,int);
SQLITE_PRIVATE int sqlite3OpenTableAndIndices(Parse*, Table*, int, int, u8*, int*, int*);
SQLITE_PRIVATE void sqlite3BeginWriteOperation(Parse*, int, int);
SQLITE_PRIVATE void sqlite3MultiWrite(Parse*);
SQLITE_PRIVATE void sqlite3MayAbort(Parse*);
................................................................................
SQLITE_PRIVATE   void sqlite3CodeRowTrigger(Parse*, Trigger *, int, ExprList*, int, Table *,
                            int, int, int);
SQLITE_PRIVATE   void sqlite3CodeRowTriggerDirect(Parse *, Trigger *, Table *, int, int, int);
  void sqliteViewTriggers(Parse*, Table*, Expr*, int, ExprList*);
SQLITE_PRIVATE   void sqlite3DeleteTriggerStep(sqlite3*, TriggerStep*);
SQLITE_PRIVATE   TriggerStep *sqlite3TriggerSelectStep(sqlite3*,Select*);
SQLITE_PRIVATE   TriggerStep *sqlite3TriggerInsertStep(sqlite3*,Token*, IdList*,
                                        Select*,u8);
SQLITE_PRIVATE   TriggerStep *sqlite3TriggerUpdateStep(sqlite3*,Token*,ExprList*, Expr*, u8);
SQLITE_PRIVATE   TriggerStep *sqlite3TriggerDeleteStep(sqlite3*,Token*, Expr*);
SQLITE_PRIVATE   void sqlite3DeleteTrigger(sqlite3*, Trigger*);
SQLITE_PRIVATE   void sqlite3UnlinkAndDeleteTrigger(sqlite3*,int,const char*);
SQLITE_PRIVATE   u32 sqlite3TriggerColmask(Parse*,Trigger*,ExprList*,int,int,Table*,int);
# define sqlite3ParseToplevel(p) ((p)->pToplevel ? (p)->pToplevel : (p))
#else
................................................................................
SQLITE_PRIVATE char sqlite3ExprAffinity(Expr *pExpr);
SQLITE_PRIVATE int sqlite3Atoi64(const char*, i64*, int, u8);
SQLITE_PRIVATE void sqlite3Error(sqlite3*, int, const char*,...);
SQLITE_PRIVATE void *sqlite3HexToBlob(sqlite3*, const char *z, int n);
SQLITE_PRIVATE u8 sqlite3HexToInt(int h);
SQLITE_PRIVATE int sqlite3TwoPartName(Parse *, Token *, Token *, Token **);


#if defined(SQLITE_TEST) 
SQLITE_PRIVATE const char *sqlite3ErrName(int);
#endif

SQLITE_PRIVATE const char *sqlite3ErrStr(int);
SQLITE_PRIVATE int sqlite3ReadSchema(Parse *pParse);
SQLITE_PRIVATE CollSeq *sqlite3FindCollSeq(sqlite3*,u8 enc, const char*,int);
SQLITE_PRIVATE CollSeq *sqlite3LocateCollSeq(Parse *pParse, const char*zName);
................................................................................
#endif
SQLITE_PRIVATE u8 sqlite3GetBoolean(const char *z,int);

SQLITE_PRIVATE const void *sqlite3ValueText(sqlite3_value*, u8);
SQLITE_PRIVATE int sqlite3ValueBytes(sqlite3_value*, u8);
SQLITE_PRIVATE void sqlite3ValueSetStr(sqlite3_value*, int, const void *,u8, 
                        void(*)(void*));
SQLITE_PRIVATE void sqlite3ValueSetNull(sqlite3_value*);
SQLITE_PRIVATE void sqlite3ValueFree(sqlite3_value*);
SQLITE_PRIVATE sqlite3_value *sqlite3ValueNew(sqlite3 *);
SQLITE_PRIVATE char *sqlite3Utf16to8(sqlite3 *, const void*, int, u8);
SQLITE_PRIVATE int sqlite3ValueFromExpr(sqlite3 *, Expr *, u8, u8, sqlite3_value **);
SQLITE_PRIVATE void sqlite3ValueApplyAffinity(sqlite3_value *, u8, u8);
#ifndef SQLITE_AMALGAMATION
SQLITE_PRIVATE const unsigned char sqlite3OpcodeProperty[];
................................................................................
  FuncDestructor *pDestructor
);
SQLITE_PRIVATE int sqlite3ApiExit(sqlite3 *db, int);
SQLITE_PRIVATE int sqlite3OpenTempDatabase(Parse *);

SQLITE_PRIVATE void sqlite3StrAccumInit(StrAccum*, char*, int, int);
SQLITE_PRIVATE void sqlite3StrAccumAppend(StrAccum*,const char*,int);
SQLITE_PRIVATE void sqlite3StrAccumAppendAll(StrAccum*,const char*);
SQLITE_PRIVATE void sqlite3AppendSpace(StrAccum*,int);
SQLITE_PRIVATE char *sqlite3StrAccumFinish(StrAccum*);
SQLITE_PRIVATE void sqlite3StrAccumReset(StrAccum*);
SQLITE_PRIVATE void sqlite3SelectDestInit(SelectDest*,int,int);
SQLITE_PRIVATE Expr *sqlite3CreateColumnExpr(sqlite3 *, SrcList *, int, int);

SQLITE_PRIVATE void sqlite3BackupRestart(sqlite3_backup *);
................................................................................
SQLITE_PRIVATE CollSeq *sqlite3BinaryCompareCollSeq(Parse *, Expr *, Expr *);
SQLITE_PRIVATE int sqlite3TempInMemory(const sqlite3*);
SQLITE_PRIVATE const char *sqlite3JournalModename(int);
#ifndef SQLITE_OMIT_WAL
SQLITE_PRIVATE   int sqlite3Checkpoint(sqlite3*, int, int, int*, int*);
SQLITE_PRIVATE   int sqlite3WalDefaultHook(void*,sqlite3*,const char*,int);
#endif
#ifndef SQLITE_OMIT_CTE
SQLITE_PRIVATE   With *sqlite3WithAdd(Parse*,With*,Token*,ExprList*,Select*);
SQLITE_PRIVATE   void sqlite3WithDelete(sqlite3*,With*);
SQLITE_PRIVATE   void sqlite3WithPush(Parse*, With*, u8);
#else
#define sqlite3WithPush(x,y,z)
#define sqlite3WithDelete(x,y)
#endif

/* Declarations for functions in fkey.c. All of these are replaced by
** no-op macros if OMIT_FOREIGN_KEY is defined. In this case no foreign
** key functionality is available. If OMIT_TRIGGER is defined but
** OMIT_FOREIGN_KEY is not, only some of the functions are no-oped. In
** this case foreign keys are parsed, but no other functionality is 
** provided (enforcement of FK constraints requires the triggers sub-system).
................................................................................
struct Vdbe {
  sqlite3 *db;            /* The database connection that owns this statement */
  Op *aOp;                /* Space to hold the virtual machine's program */
  Mem *aMem;              /* The memory locations */
  Mem **apArg;            /* Arguments to currently executing user function */
  Mem *aColName;          /* Column names to return */
  Mem *pResultSet;        /* Pointer to an array of results */
  Parse *pParse;          /* Parsing context used to create this Vdbe */
  int nMem;               /* Number of memory locations currently allocated */
  int nOp;                /* Number of instructions in the program */




  int nCursor;            /* Number of slots in apCsr[] */
  u32 magic;              /* Magic number for sanity checking */
  char *zErrMsg;          /* Error message written here */
  Vdbe *pPrev,*pNext;     /* Linked list of VDBEs with the same Vdbe.db */
  VdbeCursor **apCsr;     /* One element of this array for each open cursor */
  Mem *aVar;              /* Values for the OP_Variable opcode. */
  char **azVar;           /* Name of variables */
  ynVar nVar;             /* Number of entries in aVar[] */
  ynVar nzVar;            /* Number of entries in azVar[] */
  u32 cacheCtr;           /* VdbeCursor row cache generation counter */
  int pc;                 /* The program counter */
  int rc;                 /* Value to return */
  u16 nResColumn;         /* Number of columns in one row of the result set */
  u8 errorAction;         /* Recovery action to do in case of an error */
  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 */
................................................................................
void sqliteVdbePopStack(Vdbe*,int);
SQLITE_PRIVATE int sqlite3VdbeCursorMoveto(VdbeCursor*);
#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*, Mem*, u32);
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*);
................................................................................
** and we need to know about the failures.  Use sqlite3OsFileControlHint()
** when simply tossing information over the wall to the VFS and we do not
** really care if the VFS receives and understands the information since it
** is only a hint and can be safely ignored.  The sqlite3OsFileControlHint()
** routine has no return value since the return value would be meaningless.
*/
SQLITE_PRIVATE int sqlite3OsFileControl(sqlite3_file *id, int op, void *pArg){
#ifdef SQLITE_TEST
  if( op!=SQLITE_FCNTL_COMMIT_PHASETWO ){
    /* Faults are not injected into COMMIT_PHASETWO because, assuming SQLite
    ** is using a regular VFS, it is called after the corresponding 
    ** transaction has been committed. Injecting a fault at this point 
    ** confuses the test scripts - the COMMIT comand returns SQLITE_NOMEM
    ** but the transaction is committed anyway.
    **
    ** The core must call OsFileControl() though, not OsFileControlHint(),
    ** as if a custom VFS (e.g. zipvfs) returns an error here, it probably
    ** means the commit really has failed and an error should be returned
    ** to the user.  */
    DO_OS_MALLOC_TEST(id);
  }
#endif
  return id->pMethods->xFileControl(id, op, pArg);
}
SQLITE_PRIVATE void sqlite3OsFileControlHint(sqlite3_file *id, int op, void *pArg){
  (void)id->pMethods->xFileControl(id, op, pArg);
}

SQLITE_PRIVATE int sqlite3OsSectorSize(sqlite3_file *id){
................................................................................
}

/*
** TRUE if p is a lookaside memory allocation from db
*/
#ifndef SQLITE_OMIT_LOOKASIDE
static int isLookaside(sqlite3 *db, void *p){
  return p>=db->lookaside.pStart && p<db->lookaside.pEnd;
}
#else
#define isLookaside(A,B) 0
#endif

/*
** Return the size of a memory allocation previously obtained from
................................................................................
*/
SQLITE_PRIVATE int sqlite3MallocSize(void *p){
  assert( sqlite3MemdebugHasType(p, MEMTYPE_HEAP) );
  assert( sqlite3MemdebugNoType(p, MEMTYPE_DB) );
  return sqlite3GlobalConfig.m.xSize(p);
}
SQLITE_PRIVATE int sqlite3DbMallocSize(sqlite3 *db, void *p){
  assert( db!=0 );
  assert( sqlite3_mutex_held(db->mutex) );
  if( isLookaside(db, p) ){
    return db->lookaside.sz;
  }else{
    assert( sqlite3MemdebugHasType(p, MEMTYPE_DB) );
    assert( sqlite3MemdebugHasType(p, MEMTYPE_LOOKASIDE|MEMTYPE_HEAP) );
    assert( db!=0 || sqlite3MemdebugNoType(p, MEMTYPE_LOOKASIDE) );
    return sqlite3GlobalConfig.m.xSize(p);
  }
................................................................................
    sqlite3StrAccumAppend(pAccum, zSpaces, sizeof(zSpaces)-1);
    N -= sizeof(zSpaces)-1;
  }
  if( N>0 ){
    sqlite3StrAccumAppend(pAccum, zSpaces, N);
  }
}

/*
** Set the StrAccum object to an error mode.
*/
static void setStrAccumError(StrAccum *p, u8 eError){
  p->accError = eError;
  p->nAlloc = 0;
}

/*
** Extra argument values from a PrintfArguments object
*/
static sqlite3_int64 getIntArg(PrintfArguments *p){
  if( p->nArg<=p->nUsed ) return 0;
  return sqlite3_value_int64(p->apArg[p->nUsed++]);
}
static double getDoubleArg(PrintfArguments *p){
  if( p->nArg<=p->nUsed ) return 0.0;
  return sqlite3_value_double(p->apArg[p->nUsed++]);
}
static char *getTextArg(PrintfArguments *p){
  if( p->nArg<=p->nUsed ) return 0;
  return (char*)sqlite3_value_text(p->apArg[p->nUsed++]);
}


/*
** On machines with a small stack size, you can redefine the
** SQLITE_PRINT_BUF_SIZE to be something smaller, if desired.
*/
#ifndef SQLITE_PRINT_BUF_SIZE
# define SQLITE_PRINT_BUF_SIZE 70
................................................................................
#endif
#define etBUFSIZE SQLITE_PRINT_BUF_SIZE  /* Size of the output buffer */

/*
** Render a string given by "fmt" into the StrAccum object.
*/
SQLITE_PRIVATE void sqlite3VXPrintf(
  StrAccum *pAccum,          /* Accumulate results here */
  u32 bFlags,                /* SQLITE_PRINTF_* flags */
  const char *fmt,           /* Format string */
  va_list ap                 /* arguments */
){
  int c;                     /* Next character in the format string */
  char *bufpt;               /* Pointer to the conversion buffer */
  int precision;             /* Precision of the current field */
  int length;                /* Length of the field */
  int idx;                   /* A general purpose loop counter */
  int width;                 /* Width of the current field */
................................................................................
  etByte flag_alternateform; /* True if "#" flag is present */
  etByte flag_altform2;      /* True if "!" flag is present */
  etByte flag_zeropad;       /* True if field width constant starts with zero */
  etByte flag_long;          /* True if "l" flag is present */
  etByte flag_longlong;      /* True if the "ll" flag is present */
  etByte done;               /* Loop termination flag */
  etByte xtype = 0;          /* Conversion paradigm */
  u8 bArgList;               /* True for SQLITE_PRINTF_SQLFUNC */
  u8 useIntern;              /* Ok to use internal conversions (ex: %T) */
  char prefix;               /* Prefix character.  "+" or "-" or " " or '\0'. */
  sqlite_uint64 longvalue;   /* Value for integer types */
  LONGDOUBLE_TYPE realvalue; /* Value for real types */
  const et_info *infop;      /* Pointer to the appropriate info structure */
  char *zOut;                /* Rendering buffer */
  int nOut;                  /* Size of the rendering buffer */
  char *zExtra;              /* Malloced memory used by some conversion */
................................................................................
#ifndef SQLITE_OMIT_FLOATING_POINT
  int  exp, e2;              /* exponent of real numbers */
  int nsd;                   /* Number of significant digits returned */
  double rounder;            /* Used for rounding floating point values */
  etByte flag_dp;            /* True if decimal point should be shown */
  etByte flag_rtz;           /* True if trailing zeros should be removed */
#endif
  PrintfArguments *pArgList = 0; /* Arguments for SQLITE_PRINTF_SQLFUNC */
  char buf[etBUFSIZE];       /* Conversion buffer */

  bufpt = 0;
  if( bFlags ){
    if( (bArgList = (bFlags & SQLITE_PRINTF_SQLFUNC))!=0 ){
      pArgList = va_arg(ap, PrintfArguments*);
    }
    useIntern = bFlags & SQLITE_PRINTF_INTERNAL;
  }else{
    bArgList = useIntern = 0;
  }
  for(; (c=(*fmt))!=0; ++fmt){
    if( c!='%' ){
      int amt;
      bufpt = (char *)fmt;
      amt = 1;
      while( (c=(*++fmt))!='%' && c!=0 ) amt++;
      sqlite3StrAccumAppend(pAccum, bufpt, amt);
................................................................................
        case '0':   flag_zeropad = 1;         break;
        default:    done = 1;                 break;
      }
    }while( !done && (c=(*++fmt))!=0 );
    /* Get the field width */
    width = 0;
    if( c=='*' ){
      if( bArgList ){
        width = (int)getIntArg(pArgList);
      }else{
        width = va_arg(ap,int);
      }
      if( width<0 ){
        flag_leftjustify = 1;
        width = -width;
      }
      c = *++fmt;
    }else{
      while( c>='0' && c<='9' ){
................................................................................
      }
    }
    /* Get the precision */
    if( c=='.' ){
      precision = 0;
      c = *++fmt;
      if( c=='*' ){
        if( bArgList ){
          precision = (int)getIntArg(pArgList);
        }else{
          precision = va_arg(ap,int);
        }
        if( precision<0 ) precision = -precision;
        c = *++fmt;
      }else{
        while( c>='0' && c<='9' ){
          precision = precision*10 + c - '0';
          c = *++fmt;
        }
................................................................................
    }
    /* Fetch the info entry for the field */
    infop = &fmtinfo[0];
    xtype = etINVALID;
    for(idx=0; idx<ArraySize(fmtinfo); idx++){
      if( c==fmtinfo[idx].fmttype ){
        infop = &fmtinfo[idx];
        if( useIntern || (infop->flags & FLAG_INTERN)==0 ){
          xtype = infop->type;
        }else{
          return;
        }
        break;
      }
    }
................................................................................
        flag_longlong = sizeof(char*)==sizeof(i64);
        flag_long = sizeof(char*)==sizeof(long int);
        /* Fall through into the next case */
      case etORDINAL:
      case etRADIX:
        if( infop->flags & FLAG_SIGNED ){
          i64 v;
          if( bArgList ){
            v = getIntArg(pArgList);
          }else if( flag_longlong ){
            v = va_arg(ap,i64);
          }else if( flag_long ){
            v = va_arg(ap,long int);
          }else{
            v = va_arg(ap,int);
          }
          if( v<0 ){
................................................................................
          }else{
            longvalue = v;
            if( flag_plussign )        prefix = '+';
            else if( flag_blanksign )  prefix = ' ';
            else                       prefix = 0;
          }
        }else{
          if( bArgList ){
            longvalue = (u64)getIntArg(pArgList);
          }else if( flag_longlong ){
            longvalue = va_arg(ap,u64);
          }else if( flag_long ){
            longvalue = va_arg(ap,unsigned long int);
          }else{
            longvalue = va_arg(ap,unsigned int);
          }
          prefix = 0;
................................................................................
        if( precision<etBUFSIZE-10 ){
          nOut = etBUFSIZE;
          zOut = buf;
        }else{
          nOut = precision + 10;
          zOut = zExtra = sqlite3Malloc( nOut );
          if( zOut==0 ){
            setStrAccumError(pAccum, STRACCUM_NOMEM);
            return;
          }
        }
        bufpt = &zOut[nOut-1];
        if( xtype==etORDINAL ){
          static const char zOrd[] = "thstndrd";
          int x = (int)(longvalue % 10);
................................................................................
          for(; (x=(*pre))!=0; pre++) *(--bufpt) = x;
        }
        length = (int)(&zOut[nOut-1]-bufpt);
        break;
      case etFLOAT:
      case etEXP:
      case etGENERIC:
        if( bArgList ){
          realvalue = getDoubleArg(pArgList);
        }else{
          realvalue = va_arg(ap,double);
        }
#ifdef SQLITE_OMIT_FLOATING_POINT
        length = 0;
#else
        if( precision<0 ) precision = 6;         /* Set default precision */
        if( realvalue<0.0 ){
          realvalue = -realvalue;
          prefix = '-';
................................................................................
          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 ){
            setStrAccumError(pAccum, 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 */
................................................................................
          i = prefix!=0;
          while( nPad-- ) bufpt[i++] = '0';
          length = width;
        }
#endif /* !defined(SQLITE_OMIT_FLOATING_POINT) */
        break;
      case etSIZE:
        if( !bArgList ){
          *(va_arg(ap,int*)) = pAccum->nChar;
        }
        length = width = 0;
        break;
      case etPERCENT:
        buf[0] = '%';
        bufpt = buf;
        length = 1;
        break;
      case etCHARX:
        if( bArgList ){
          bufpt = getTextArg(pArgList);
          c = bufpt ? bufpt[0] : 0;
        }else{
          c = va_arg(ap,int);
        }
        buf[0] = (char)c;
        if( precision>=0 ){
          for(idx=1; idx<precision; idx++) buf[idx] = (char)c;
          length = precision;
        }else{
          length =1;
        }
        bufpt = buf;
        break;
      case etSTRING:
      case etDYNSTRING:
        if( bArgList ){
          bufpt = getTextArg(pArgList);
        }else{
          bufpt = va_arg(ap,char*);
        }
        if( bufpt==0 ){
          bufpt = "";
        }else if( xtype==etDYNSTRING && !bArgList ){
          zExtra = bufpt;
        }
        if( precision>=0 ){
          for(length=0; length<precision && bufpt[length]; length++){}
        }else{
          length = sqlite3Strlen30(bufpt);
        }
................................................................................
      case etSQLESCAPE:
      case etSQLESCAPE2:
      case etSQLESCAPE3: {
        int i, j, k, n, isnull;
        int needQuote;
        char ch;
        char q = ((xtype==etSQLESCAPE3)?'"':'\'');   /* Quote character */
        char *escarg;

        if( bArgList ){
          escarg = getTextArg(pArgList);
        }else{
          escarg = va_arg(ap,char*);
        }
        isnull = escarg==0;
        if( isnull ) escarg = (xtype==etSQLESCAPE2 ? "NULL" : "(NULL)");
        k = precision;
        for(i=n=0; k!=0 && (ch=escarg[i])!=0; i++, k--){
          if( ch==q )  n++;
        }
        needQuote = !isnull && xtype==etSQLESCAPE2;
        n += i + 1 + needQuote*2;
        if( n>etBUFSIZE ){
          bufpt = zExtra = sqlite3Malloc( n );
          if( bufpt==0 ){
            setStrAccumError(pAccum, STRACCUM_NOMEM);
            return;
          }
        }else{
          bufpt = buf;
        }
        j = 0;
        if( needQuote ) bufpt[j++] = q;
................................................................................
        /* The precision in %q and %Q means how many input characters to
        ** consume, not the length of the output...
        ** if( precision>=0 && precision<length ) length = precision; */
        break;
      }
      case etTOKEN: {
        Token *pToken = va_arg(ap, Token*);
        assert( bArgList==0 );
        if( pToken && pToken->n ){
          sqlite3StrAccumAppend(pAccum, (const char*)pToken->z, pToken->n);
        }
        length = width = 0;
        break;
      }
      case etSRCLIST: {
        SrcList *pSrc = va_arg(ap, SrcList*);
        int k = va_arg(ap, int);
        struct SrcList_item *pItem = &pSrc->a[k];
        assert( bArgList==0 );
        assert( k>=0 && k<pSrc->nSrc );
        if( pItem->zDatabase ){
          sqlite3StrAccumAppendAll(pAccum, pItem->zDatabase);
          sqlite3StrAccumAppend(pAccum, ".", 1);
        }
        sqlite3StrAccumAppendAll(pAccum, pItem->zName);
        length = width = 0;
        break;
      }
      default: {
        assert( xtype==etINVALID );
        return;
      }
................................................................................
    if( flag_leftjustify ){
      register int nspace;
      nspace = width-length;
      if( nspace>0 ){
        sqlite3AppendSpace(pAccum, nspace);
      }
    }
    if( zExtra ) sqlite3_free(zExtra);
  }/* End for loop over the format string */
} /* 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 );
  assert( p->zText!=0 || p->nChar==0 || p->accError );
  assert( N>=0 );
  assert( p->accError==0 || p->nAlloc==0 );
  if( p->nChar+N >= p->nAlloc ){
    char *zNew;
    if( p->accError ){
      testcase(p->accError==STRACCUM_TOOBIG);
      testcase(p->accError==STRACCUM_NOMEM);
      return;
    }







    if( !p->useMalloc ){

      N = p->nAlloc - p->nChar - 1;
      setStrAccumError(p, STRACCUM_TOOBIG);
      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);
        setStrAccumError(p, 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{

        sqlite3StrAccumReset(p);
        setStrAccumError(p, STRACCUM_NOMEM);
        return;
      }
    }
  }
  assert( p->zText );
  memcpy(&p->zText[p->nChar], z, N);
  p->nChar += N;
}

/*
** Append the complete text of zero-terminated string z[] to the p string.
*/
SQLITE_PRIVATE void sqlite3StrAccumAppendAll(StrAccum *p, const char *z){
  sqlite3StrAccumAppend(p, z, sqlite3Strlen30(z));
}


/*
** Finish off a string by making sure it is zero-terminated.
** Return a pointer to the resulting string.  Return a NULL
** pointer if any kind of error was encountered.
*/
SQLITE_PRIVATE char *sqlite3StrAccumFinish(StrAccum *p){
................................................................................
        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{
        setStrAccumError(p, STRACCUM_NOMEM);
      }
    }
  }
  return p->zText;
}

/*
................................................................................
  char *z;
  char zBase[SQLITE_PRINT_BUF_SIZE];
  StrAccum acc;
  assert( db!=0 );
  sqlite3StrAccumInit(&acc, zBase, sizeof(zBase),
                      db->aLimit[SQLITE_LIMIT_LENGTH]);
  acc.db = db;
  sqlite3VXPrintf(&acc, SQLITE_PRINTF_INTERNAL, zFormat, ap);
  z = sqlite3StrAccumFinish(&acc);
  if( acc.accError==STRACCUM_NOMEM ){
    db->mallocFailed = 1;
  }
  return z;
}

................................................................................
  va_end(ap);
  sqlite3StrAccumFinish(&acc);
  fprintf(stdout,"%s", zBuf);
  fflush(stdout);
}
#endif


/*
** variable-argument wrapper around sqlite3VXPrintf().
*/
SQLITE_PRIVATE void sqlite3XPrintf(StrAccum *p, u32 bFlags, const char *zFormat, ...){
  va_list ap;
  va_start(ap,zFormat);
  sqlite3VXPrintf(p, bFlags, zFormat, ap);
  va_end(ap);
}


/************** End of printf.c **********************************************/
/************** Begin file random.c ******************************************/
/*
** 2001 September 15
**
** The author disclaims copyright to this source code.  In place of
................................................................................
** encoded in UTF-8.
**
** To clear the most recent error for sqlite handle "db", sqlite3Error
** should be called with err_code set to SQLITE_OK and zFormat set
** to NULL.
*/
SQLITE_PRIVATE void sqlite3Error(sqlite3 *db, int err_code, const char *zFormat, ...){
  assert( db!=0 );
  db->errCode = err_code;
  if( zFormat && (db->pErr || (db->pErr = sqlite3ValueNew(db))!=0) ){
    char *z;
    va_list ap;
    va_start(ap, zFormat);
    z = sqlite3VMPrintf(db, zFormat, ap);
    va_end(ap);
    sqlite3ValueSetStr(db->pErr, -1, z, SQLITE_UTF8, SQLITE_DYNAMIC);
  }else if( db->pErr ){
    sqlite3ValueSetNull(db->pErr);

  }
}

/*
** Add an error message to pParse->zErrMsg and increment pParse->nErr.
** The following formatting characters are allowed:
**
................................................................................
     /*  23 */ "Integer"          OpHelp("r[P2]=P1"),
     /*  24 */ "Int64"            OpHelp("r[P2]=P4"),
     /*  25 */ "String"           OpHelp("r[P2]='P4' (len=P1)"),
     /*  26 */ "Null"             OpHelp("r[P2..P3]=NULL"),
     /*  27 */ "Blob"             OpHelp("r[P2]=P4 (len=P1)"),
     /*  28 */ "Variable"         OpHelp("r[P2]=parameter(P1,P4)"),
     /*  29 */ "Move"             OpHelp("r[P2@P3]=r[P1@P3]"),
     /*  30 */ "Copy"             OpHelp("r[P2@P3+1]=r[P1@P3+1]"),
     /*  31 */ "SCopy"            OpHelp("r[P2]=r[P1]"),
     /*  32 */ "ResultRow"        OpHelp("output=r[P1@P2]"),
     /*  33 */ "CollSeq"          OpHelp(""),
     /*  34 */ "AddImm"           OpHelp("r[P1]=r[P1]+P2"),
     /*  35 */ "MustBeInt"        OpHelp(""),
     /*  36 */ "RealAffinity"     OpHelp(""),
     /*  37 */ "Permutation"      OpHelp(""),
................................................................................
     /*  47 */ "ReadCookie"       OpHelp(""),
     /*  48 */ "SetCookie"        OpHelp(""),
     /*  49 */ "VerifyCookie"     OpHelp(""),
     /*  50 */ "OpenRead"         OpHelp("root=P2 iDb=P3"),
     /*  51 */ "OpenWrite"        OpHelp("root=P2 iDb=P3"),
     /*  52 */ "OpenAutoindex"    OpHelp("nColumn=P2"),
     /*  53 */ "OpenEphemeral"    OpHelp("nColumn=P2"),
     /*  54 */ "SwapCursors"      OpHelp(""),
     /*  55 */ "SorterOpen"       OpHelp(""),
     /*  56 */ "OpenPseudo"       OpHelp("content in r[P2@P3]"),
     /*  57 */ "Close"            OpHelp(""),
     /*  58 */ "SeekLt"           OpHelp("key=r[P3@P4]"),
     /*  59 */ "SeekLe"           OpHelp("key=r[P3@P4]"),
     /*  60 */ "SeekGe"           OpHelp("key=r[P3@P4]"),
     /*  61 */ "SeekGt"           OpHelp("key=r[P3@P4]"),
     /*  62 */ "Seek"             OpHelp("intkey=r[P2]"),
     /*  63 */ "NoConflict"       OpHelp("key=r[P3@P4]"),
     /*  64 */ "NotFound"         OpHelp("key=r[P3@P4]"),
     /*  65 */ "Found"            OpHelp("key=r[P3@P4]"),
     /*  66 */ "NotExists"        OpHelp("intkey=r[P3]"),
     /*  67 */ "Sequence"         OpHelp("r[P2]=rowid"),
     /*  68 */ "NewRowid"         OpHelp("r[P2]=rowid"),
     /*  69 */ "Insert"           OpHelp("intkey=r[P3] data=r[P2]"),
     /*  70 */ "InsertInt"        OpHelp("intkey=P3 data=r[P2]"),
     /*  71 */ "Or"               OpHelp("r[P3]=(r[P1] || r[P2])"),
     /*  72 */ "And"              OpHelp("r[P3]=(r[P1] && r[P2])"),

     /*  73 */ "Delete"           OpHelp(""),
     /*  74 */ "ResetCount"       OpHelp(""),
     /*  75 */ "SorterCompare"    OpHelp("if key(P1)!=rtrim(r[P3],P4) goto P2"),
     /*  76 */ "IsNull"           OpHelp("if r[P1]==NULL goto P2"),
     /*  77 */ "NotNull"          OpHelp("if r[P1]!=NULL goto P2"),
     /*  78 */ "Ne"               OpHelp("if r[P1]!=r[P3] goto P2"),
     /*  79 */ "Eq"               OpHelp("if r[P1]==r[P3] goto P2"),
     /*  80 */ "Gt"               OpHelp("if r[P1]>r[P3] goto P2"),
     /*  81 */ "Le"               OpHelp("if r[P1]<=r[P3] goto P2"),
     /*  82 */ "Lt"               OpHelp("if r[P1]<r[P3] goto P2"),
     /*  83 */ "Ge"               OpHelp("if r[P1]>=r[P3] goto P2"),

     /*  84 */ "SorterData"       OpHelp("r[P2]=data"),
     /*  85 */ "BitAnd"           OpHelp("r[P3]=r[P1]&r[P2]"),
     /*  86 */ "BitOr"            OpHelp("r[P3]=r[P1]|r[P2]"),
     /*  87 */ "ShiftLeft"        OpHelp("r[P3]=r[P2]<<r[P1]"),
     /*  88 */ "ShiftRight"       OpHelp("r[P3]=r[P2]>>r[P1]"),
     /*  89 */ "Add"              OpHelp("r[P3]=r[P1]+r[P2]"),
     /*  90 */ "Subtract"         OpHelp("r[P3]=r[P2]-r[P1]"),
     /*  91 */ "Multiply"         OpHelp("r[P3]=r[P1]*r[P2]"),
     /*  92 */ "Divide"           OpHelp("r[P3]=r[P2]/r[P1]"),
     /*  93 */ "Remainder"        OpHelp("r[P3]=r[P2]%r[P1]"),
     /*  94 */ "Concat"           OpHelp("r[P3]=r[P2]+r[P1]"),

     /*  95 */ "RowKey"           OpHelp("r[P2]=key"),
     /*  96 */ "BitNot"           OpHelp("r[P1]= ~r[P1]"),
     /*  97 */ "String8"          OpHelp("r[P2]='P4'"),

     /*  98 */ "RowData"          OpHelp("r[P2]=data"),
     /*  99 */ "Rowid"            OpHelp("r[P2]=rowid"),
     /* 100 */ "NullRow"          OpHelp(""),
     /* 101 */ "Last"             OpHelp(""),
     /* 102 */ "SorterSort"       OpHelp(""),
     /* 103 */ "Sort"             OpHelp(""),
     /* 104 */ "Rewind"           OpHelp(""),
     /* 105 */ "SorterInsert"     OpHelp(""),
     /* 106 */ "IdxInsert"        OpHelp("key=r[P2]"),
     /* 107 */ "IdxDelete"        OpHelp("key=r[P2@P3]"),
     /* 108 */ "IdxRowid"         OpHelp("r[P2]=rowid"),
     /* 109 */ "IdxLT"            OpHelp("key=r[P3@P4]"),
     /* 110 */ "IdxGE"            OpHelp("key=r[P3@P4]"),
     /* 111 */ "Destroy"          OpHelp(""),
     /* 112 */ "Clear"            OpHelp(""),
     /* 113 */ "CreateIndex"      OpHelp("r[P2]=root iDb=P1"),
     /* 114 */ "CreateTable"      OpHelp("r[P2]=root iDb=P1"),
     /* 115 */ "ParseSchema"      OpHelp(""),
     /* 116 */ "LoadAnalysis"     OpHelp(""),
     /* 117 */ "DropTable"        OpHelp(""),
     /* 118 */ "DropIndex"        OpHelp(""),
     /* 119 */ "DropTrigger"      OpHelp(""),
     /* 120 */ "IntegrityCk"      OpHelp(""),
     /* 121 */ "RowSetAdd"        OpHelp("rowset(P1)=r[P2]"),
     /* 122 */ "RowSetRead"       OpHelp("r[P3]=rowset(P1)"),
     /* 123 */ "RowSetTest"       OpHelp("if r[P3] in rowset(P1) goto P2"),
     /* 124 */ "Program"          OpHelp(""),
     /* 125 */ "Param"            OpHelp(""),
     /* 126 */ "FkCounter"        OpHelp("fkctr[P1]+=P2"),
     /* 127 */ "FkIfZero"         OpHelp("if fkctr[P1]==0 goto P2"),
     /* 128 */ "MemMax"           OpHelp("r[P1]=max(r[P1],r[P2])"),
     /* 129 */ "IfPos"            OpHelp("if r[P1]>0 goto P2"),
     /* 130 */ "IfNeg"            OpHelp("if r[P1]<0 goto P2"),
     /* 131 */ "IfZero"           OpHelp("r[P1]+=P3, if r[P1]==0 goto P2"),

     /* 132 */ "AggFinal"         OpHelp("accum=r[P1] N=P2"),
     /* 133 */ "Real"             OpHelp("r[P2]=P4"),
     /* 134 */ "IncrVacuum"       OpHelp(""),
     /* 135 */ "Expire"           OpHelp(""),
     /* 136 */ "TableLock"        OpHelp("iDb=P1 root=P2 write=P3"),
     /* 137 */ "VBegin"           OpHelp(""),
     /* 138 */ "VCreate"          OpHelp(""),
     /* 139 */ "VDestroy"         OpHelp(""),
     /* 140 */ "VOpen"            OpHelp(""),
     /* 141 */ "VColumn"          OpHelp("r[P3]=vcolumn(P2)"),
     /* 142 */ "VNext"            OpHelp(""),
     /* 143 */ "ToText"           OpHelp(""),
     /* 144 */ "ToBlob"           OpHelp(""),
     /* 145 */ "ToNumeric"        OpHelp(""),
     /* 146 */ "ToInt"            OpHelp(""),
     /* 147 */ "ToReal"           OpHelp(""),
     /* 148 */ "VRename"          OpHelp(""),
     /* 149 */ "Pagecount"        OpHelp(""),
     /* 150 */ "MaxPgcnt"         OpHelp(""),
     /* 151 */ "Trace"            OpHelp(""),
     /* 152 */ "Noop"             OpHelp(""),
     /* 153 */ "Explain"          OpHelp(""),
  };
  return azName[i];
}
#endif

/************** End of opcodes.c *********************************************/
/************** Begin file os_unix.c *****************************************/
................................................................................
  }else{
    pInode->nRef++;
  }
  *ppInode = pInode;
  return SQLITE_OK;
}

/*
** Return TRUE if pFile has been renamed or unlinked since it was first opened.
*/
static int fileHasMoved(unixFile *pFile){
  struct stat buf;
  return pFile->pInode!=0 &&
         (osStat(pFile->zPath, &buf)!=0 || buf.st_ino!=pFile->pInode->fileId.ino);
}


/*
** Check a unixFile that is a database.  Verify the following:
**
** (1) There is exactly one hard link on the file
** (2) The file is not a symbolic link
** (3) The file has not been renamed or unlinked
................................................................................
    return;
  }
  if( buf.st_nlink>1 ){
    sqlite3_log(SQLITE_WARNING, "multiple links to file: %s", pFile->zPath);
    pFile->ctrlFlags |= UNIXFILE_WARNED;
    return;
  }
  if( fileHasMoved(pFile) ){



    sqlite3_log(SQLITE_WARNING, "file renamed while open: %s", pFile->zPath);
    pFile->ctrlFlags |= UNIXFILE_WARNED;
    return;
  }
}


................................................................................
    case SQLITE_FCNTL_TEMPFILENAME: {
      char *zTFile = sqlite3_malloc( pFile->pVfs->mxPathname );
      if( zTFile ){
        unixGetTempname(pFile->pVfs->mxPathname, zTFile);
        *(char**)pArg = zTFile;
      }
      return SQLITE_OK;
    }
    case SQLITE_FCNTL_HAS_MOVED: {
      *(int*)pArg = fileHasMoved(pFile);
      return SQLITE_OK;
    }
#if SQLITE_MAX_MMAP_SIZE>0
    case SQLITE_FCNTL_MMAP_SIZE: {
      i64 newLimit = *(i64*)pArg;
      int rc = SQLITE_OK;
      if( newLimit>sqlite3GlobalConfig.mxMmap ){
        newLimit = sqlite3GlobalConfig.mxMmap;
................................................................................
** argument that was passed to the unixFetch() invocation. 
**
** Or, if the third argument is NULL, then this function is being called 
** to inform the VFS layer that, according to POSIX, any existing mapping 
** may now be invalid and should be unmapped.
*/
static int unixUnfetch(sqlite3_file *fd, i64 iOff, void *p){
#if SQLITE_MAX_MMAP_SIZE>0
  unixFile *pFd = (unixFile *)fd;   /* The underlying database file */
  UNUSED_PARAMETER(iOff);


  /* If p==0 (unmap the entire file) then there must be no outstanding 
  ** xFetch references. Or, if p!=0 (meaning it is an xFetch reference),
  ** then there must be at least one outstanding.  */
  assert( (p==0)==(pFd->nFetchOut==0) );

  /* If p!=0, it must match the iOff value. */
  assert( p==0 || p==&((u8 *)pFd->pMapRegion)[iOff] );
................................................................................
  if( p ){
    pFd->nFetchOut--;
  }else{
    unixUnmapfile(pFd);
  }

  assert( pFd->nFetchOut>=0 );
#else
  UNUSED_PARAMETER(fd);
  UNUSED_PARAMETER(p);
  UNUSED_PARAMETER(iOff);
#endif
  return SQLITE_OK;
}

/*
** Here ends the implementation of all sqlite3_file methods.
**
................................................................................
** structure. Unless SQLITE_PCACHE_SEPARATE_HEADER is defined, a buffer of
** PgHdr1.pCache->szPage bytes is allocated directly before this structure 
** in memory.
*/
struct PgHdr1 {
  sqlite3_pcache_page page;
  unsigned int iKey;             /* Key value (page number) */
  u8 isPinned;                   /* Page in use, not on the LRU list */
  PgHdr1 *pNext;                 /* Next in hash table chain */
  PCache1 *pCache;               /* Cache that currently owns this page */
  PgHdr1 *pLruNext;              /* Next in LRU list of unpinned pages */
  PgHdr1 *pLruPrev;              /* Previous in LRU list of unpinned pages */
};

/*
................................................................................

/*
** This function is used internally to remove the page pPage from the 
** PGroup LRU list, if is part of it. If pPage is not part of the PGroup
** LRU list, then this function is a no-op.
**
** The PGroup mutex must be held when this function is called.


*/
static void pcache1PinPage(PgHdr1 *pPage){
  PCache1 *pCache;
  PGroup *pGroup;

  assert( pPage!=0 );
  assert( pPage->isPinned==0 );
  pCache = pPage->pCache;
  pGroup = pCache->pGroup;
  assert( pPage->pLruNext || pPage==pGroup->pLruTail );
  assert( pPage->pLruPrev || pPage==pGroup->pLruHead );
  assert( sqlite3_mutex_held(pGroup->mutex) );

  if( pPage->pLruPrev ){
    pPage->pLruPrev->pLruNext = pPage->pLruNext;
  }else{
    pGroup->pLruHead = pPage->pLruNext;
  }
  if( pPage->pLruNext ){
    pPage->pLruNext->pLruPrev = pPage->pLruPrev;




  }else{
    pGroup->pLruTail = pPage->pLruPrev;
  }
  pPage->pLruNext = 0;
  pPage->pLruPrev = 0;
  pPage->isPinned = 1;
  pCache->nRecyclable--;

}


/*
** Remove the page supplied as an argument from the hash table 
** (PCache1.apHash structure) that it is currently stored in.
**
................................................................................
** to recycle pages to reduce the number allocated to nMaxPage.
*/
static void pcache1EnforceMaxPage(PGroup *pGroup){
  assert( sqlite3_mutex_held(pGroup->mutex) );
  while( pGroup->nCurrentPage>pGroup->nMaxPage && pGroup->pLruTail ){
    PgHdr1 *p = pGroup->pLruTail;
    assert( p->pCache->pGroup==pGroup );
    assert( p->isPinned==0 );
    pcache1PinPage(p);
    pcache1RemoveFromHash(p);
    pcache1FreePage(p);
  }
}

/*
................................................................................
  for(h=0; h<pCache->nHash; h++){
    PgHdr1 **pp = &pCache->apHash[h]; 
    PgHdr1 *pPage;
    while( (pPage = *pp)!=0 ){
      if( pPage->iKey>=iLimit ){
        pCache->nPage--;
        *pp = pPage->pNext;
        if( !pPage->isPinned ) pcache1PinPage(pPage);
        pcache1FreePage(pPage);
      }else{
        pp = &pPage->pNext;
        TESTONLY( nPage++; )
      }
    }
  }
................................................................................
  /* Step 1: Search the hash table for an existing entry. */
  if( pCache->nHash>0 ){
    unsigned int h = iKey % pCache->nHash;
    for(pPage=pCache->apHash[h]; pPage&&pPage->iKey!=iKey; pPage=pPage->pNext);
  }

  /* Step 2: Abort if no existing page is found and createFlag is 0 */
  if( pPage ){
    if( !pPage->isPinned ) pcache1PinPage(pPage);
    goto fetch_out;
  }
  if( createFlag==0 ){
    goto fetch_out;
  }

  /* The pGroup local variable will normally be initialized by the
  ** pcache1EnterMutex() macro above.  But if SQLITE_MUTEX_OMIT is defined,
  ** then pcache1EnterMutex() is a no-op, so we have to initialize the
  ** local variable here.  Delaying the initialization of pGroup is an
................................................................................
  if( pCache->bPurgeable && pGroup->pLruTail && (
         (pCache->nPage+1>=pCache->nMax)
      || pGroup->nCurrentPage>=pGroup->nMaxPage
      || pcache1UnderMemoryPressure(pCache)
  )){
    PCache1 *pOther;
    pPage = pGroup->pLruTail;
    assert( pPage->isPinned==0 );
    pcache1RemoveFromHash(pPage);
    pcache1PinPage(pPage);
    pOther = pPage->pCache;

    /* We want to verify that szPage and szExtra are the same for pOther
    ** and pCache.  Assert that we can verify this by comparing sums. */
    assert( (pCache->szPage & (pCache->szPage-1))==0 && pCache->szPage>=512 );
................................................................................
    unsigned int h = iKey % pCache->nHash;
    pCache->nPage++;
    pPage->iKey = iKey;
    pPage->pNext = pCache->apHash[h];
    pPage->pCache = pCache;
    pPage->pLruPrev = 0;
    pPage->pLruNext = 0;
    pPage->isPinned = 1;
    *(void **)pPage->page.pExtra = 0;
    pCache->apHash[h] = pPage;
  }

fetch_out:
  if( pPage && iKey>pCache->iMaxKey ){
    pCache->iMaxKey = iKey;
................................................................................
  pcache1EnterMutex(pGroup);

  /* It is an error to call this function if the page is already 
  ** part of the PGroup LRU list.
  */
  assert( pPage->pLruPrev==0 && pPage->pLruNext==0 );
  assert( pGroup->pLruHead!=pPage && pGroup->pLruTail!=pPage );
  assert( pPage->isPinned==1 );

  if( reuseUnlikely || pGroup->nCurrentPage>pGroup->nMaxPage ){
    pcache1RemoveFromHash(pPage);
    pcache1FreePage(pPage);
  }else{
    /* Add the page to the PGroup LRU list. */
    if( pGroup->pLruHead ){
................................................................................
      pPage->pLruNext = pGroup->pLruHead;
      pGroup->pLruHead = pPage;
    }else{
      pGroup->pLruTail = pPage;
      pGroup->pLruHead = pPage;
    }
    pCache->nRecyclable++;
    pPage->isPinned = 0;
  }

  pcache1LeaveMutex(pCache->pGroup);
}

/*
** Implementation of the sqlite3_pcache.xRekey method. 
................................................................................
    PgHdr1 *p;
    pcache1EnterMutex(&pcache1.grp);
    while( (nReq<0 || nFree<nReq) && ((p=pcache1.grp.pLruTail)!=0) ){
      nFree += pcache1MemSize(p->page.pBuf);
#ifdef SQLITE_PCACHE_SEPARATE_HEADER
      nFree += sqlite3MemSize(p);
#endif
      assert( p->isPinned==0 );
      pcache1PinPage(p);
      pcache1RemoveFromHash(p);
      pcache1FreePage(p);
    }
    pcache1LeaveMutex(&pcache1.grp);
  }
  return nFree;
................................................................................
  int *pnMax,          /* OUT: Global maximum cache size */
  int *pnMin,          /* OUT: Sum of PCache1.nMin for purgeable caches */
  int *pnRecyclable    /* OUT: Total number of pages available for recycling */
){
  PgHdr1 *p;
  int nRecyclable = 0;
  for(p=pcache1.grp.pLruHead; p; p=p->pLruNext){
    assert( p->isPinned==0 );
    nRecyclable++;
  }
  *pnCurrent = pcache1.grp.nCurrentPage;
  *pnMax = (int)pcache1.grp.nMaxPage;
  *pnMin = (int)pcache1.grp.nMinPage;
  *pnRecyclable = nRecyclable;
}
................................................................................
**   * 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){
  Pager *pPager = pPg->pPager;
  PagerSavepoint *p;
  Pgno pgno = pPg->pgno;
  int i;


  for(i=0; i<pPager->nSavepoint; i++){
    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.
*/
static int pageInJournal(Pager *pPager, PgHdr *pPg){
  return sqlite3BitvecTest(pPager->pInJournal, pPg->pgno);
}

/*
** Read a 32-bit integer from the given file descriptor.  Store the integer
** that is read in *pRes.  Return SQLITE_OK if everything worked, or an
** error code is something goes wrong.
**
................................................................................
  unsigned char aMagic[8];   /* A buffer to hold the magic header */
  zMaster[0] = '\0';

  if( SQLITE_OK!=(rc = sqlite3OsFileSize(pJrnl, &szJ))
   || szJ<16
   || SQLITE_OK!=(rc = read32bits(pJrnl, szJ-16, &len))
   || len>=nMaster 
   || len==0 
   || SQLITE_OK!=(rc = read32bits(pJrnl, szJ-12, &cksum))
   || SQLITE_OK!=(rc = sqlite3OsRead(pJrnl, aMagic, 8, szJ-8))
   || memcmp(aMagic, aJournalMagic, 8)
   || SQLITE_OK!=(rc = sqlite3OsRead(pJrnl, zMaster, len, szJ-16-len))
  ){
    return rc;
  }
................................................................................

#ifdef SQLITE_CHECK_PAGES
  sqlite3PcacheIterateDirty(pPager->pPCache, pager_set_pagehash);
  if( pPager->dbSize==0 && sqlite3PcacheRefCount(pPager->pPCache)>0 ){
    PgHdr *p = pager_lookup(pPager, 1);
    if( p ){
      p->pageHash = 0;
      sqlite3PagerUnrefNotNull(p);
    }
  }
#endif

  sqlite3BitvecDestroy(pPager->pInJournal);
  pPager->pInJournal = 0;
  pPager->nRec = 0;
................................................................................
    ** At this point the journal has been finalized and the transaction 
    ** successfully committed, but the EXCLUSIVE lock is still held on the
    ** file. So it is safe to truncate the database file to its minimum
    ** required size.  */
    assert( pPager->eLock==EXCLUSIVE_LOCK );
    rc = pager_truncate(pPager, pPager->dbSize);
  }

  if( rc==SQLITE_OK && bCommit && isOpen(pPager->fd) ){
    rc = sqlite3OsFileControl(pPager->fd, SQLITE_FCNTL_COMMIT_PHASETWO, 0);
    if( rc==SQLITE_NOTFOUND ) rc = SQLITE_OK;
  }

  if( !pPager->exclusiveMode 
   && (!pagerUseWal(pPager) || sqlite3WalExclusiveMode(pPager->pWal, 0))
  ){
    rc2 = pagerUnlockDb(pPager, SHARED_LOCK);
    pPager->changeCountDone = 0;
  }
................................................................................
    zMaster = pPager->pTmpSpace;
    rc = readMasterJournal(pPager->jfd, zMaster, pPager->pVfs->mxPathname+1);
    testcase( rc!=SQLITE_OK );
  }
  if( rc==SQLITE_OK
   && (pPager->eState>=PAGER_WRITER_DBMOD || pPager->eState==PAGER_OPEN)
  ){
    rc = sqlite3PagerSync(pPager, 0);
  }
  if( rc==SQLITE_OK ){
    rc = pager_end_transaction(pPager, zMaster[0]!='\0', 0);
    testcase( rc!=SQLITE_OK );
  }
  if( rc==SQLITE_OK && zMaster[0] && res ){
    /* If there was a master journal and this routine will return success,
................................................................................
      rc = sqlite3WalFindFrame(pPager->pWal, pPg->pgno, &iFrame);
      if( rc==SQLITE_OK ){
        rc = readDbPage(pPg, iFrame);
      }
      if( rc==SQLITE_OK ){
        pPager->xReiniter(pPg);
      }
      sqlite3PagerUnrefNotNull(pPg);
    }
  }

  /* Normally, if a transaction is rolled back, any backup processes are
  ** updated as data is copied out of the rollback journal and into the
  ** database. This is not generally possible with a WAL database, as
  ** rollback involves simply truncating the log file. Therefore, if one
................................................................................
  if( pPager->journalMode!=PAGER_JOURNALMODE_OFF ){

    /* Open the sub-journal, if it has not already been opened */
    assert( pPager->useJournal );
    assert( isOpen(pPager->jfd) || pagerUseWal(pPager) );
    assert( isOpen(pPager->sjfd) || pPager->nSubRec==0 );
    assert( pagerUseWal(pPager) 
         || pageInJournal(pPager, pPg) 
         || pPg->pgno>pPager->dbOrigSize 
    );
    rc = openSubJournal(pPager);

    /* If the sub-journal was opened successfully (or was already open),
    ** write the journal record into the file.  */
    if( rc==SQLITE_OK ){
................................................................................
  /* memset(pPager->aHash, 0, sizeof(pPager->aHash)); */
  /* pPager->szMmap = SQLITE_DEFAULT_MMAP_SIZE // will be set by btree.c */

  *ppPager = pPager;
  return SQLITE_OK;
}


/* Verify that the database file has not be deleted or renamed out from
** under the pager.  Return SQLITE_OK if the database is still were it ought
** to be on disk.  Return non-zero (SQLITE_READONLY_DBMOVED or some other error
** code from sqlite3OsAccess()) if the database has gone missing.
*/
static int databaseIsUnmoved(Pager *pPager){
  int bHasMoved = 0;
  int rc;

  if( pPager->tempFile ) return SQLITE_OK;
  if( pPager->dbSize==0 ) return SQLITE_OK;
  assert( pPager->zFilename && pPager->zFilename[0] );
  rc = sqlite3OsFileControl(pPager->fd, SQLITE_FCNTL_HAS_MOVED, &bHasMoved);
  if( rc==SQLITE_NOTFOUND ){
    /* If the HAS_MOVED file-control is unimplemented, assume that the file
    ** has not been moved.  That is the historical behavior of SQLite: prior to
    ** version 3.8.3, it never checked */
    rc = SQLITE_OK;
  }else if( rc==SQLITE_OK && bHasMoved ){
    rc = SQLITE_READONLY_DBMOVED;
  }
  return rc;
}


/*
** This function is called after transitioning from PAGER_UNLOCK to
** PAGER_SHARED state. It tests if there is a hot journal present in
** the file-system for the given pager. A hot journal is one that 
** needs to be played back. According to this function, a hot-journal
................................................................................
  }else{

    if( bMmapOk && pagerUseWal(pPager) ){
      rc = sqlite3WalFindFrame(pPager->pWal, pgno, &iFrame);
      if( rc!=SQLITE_OK ) goto pager_acquire_err;
    }

    if( bMmapOk && iFrame==0 ){
      void *pData = 0;

      rc = sqlite3OsFetch(pPager->fd, 
          (i64)(pgno-1) * pPager->pageSize, pPager->pageSize, &pData
      );

      if( rc==SQLITE_OK && pData ){
................................................................................
** Release a page reference.
**
** If the number of references to the page drop to zero, then the
** page is added to the LRU list.  When all references to all pages
** are released, a rollback occurs and the lock on the database is
** removed.
*/
SQLITE_PRIVATE void sqlite3PagerUnrefNotNull(DbPage *pPg){
  Pager *pPager;
  assert( pPg!=0 );
  pPager = pPg->pPager;
  if( pPg->flags & PGHDR_MMAP ){
    pagerReleaseMapPage(pPg);
  }else{
    sqlite3PcacheRelease(pPg);
  }
  pagerUnlockIfUnused(pPager);
}
SQLITE_PRIVATE void sqlite3PagerUnref(DbPage *pPg){
  if( pPg ) sqlite3PagerUnrefNotNull(pPg);
}

/*
** This function is called at the start of every write transaction.
** There must already be a RESERVED or EXCLUSIVE lock on the database 
** file when this routine is called.
**
................................................................................
      }else{
        const int flags =                   /* VFS flags to open journal file */
          SQLITE_OPEN_READWRITE|SQLITE_OPEN_CREATE|
          (pPager->tempFile ? 
            (SQLITE_OPEN_DELETEONCLOSE|SQLITE_OPEN_TEMP_JOURNAL):
            (SQLITE_OPEN_MAIN_JOURNAL)
          );

        /* Verify that the database still has the same name as it did when
        ** it was originally opened. */
        rc = databaseIsUnmoved(pPager);
        if( rc==SQLITE_OK ){
#ifdef SQLITE_ENABLE_ATOMIC_WRITE
          rc = sqlite3JournalOpen(
              pVfs, pPager->zJournal, pPager->jfd, flags, jrnlBufferSize(pPager)
          );
#else
          rc = sqlite3OsOpen(pVfs, pPager->zJournal, pPager->jfd, flags, 0);
#endif
        }
      }
      assert( rc!=SQLITE_OK || isOpen(pPager->jfd) );
    }
  
  
    /* Write the first journal header to the journal file and open 
    ** the sub-journal if necessary.
................................................................................
** Mark a single data page as writeable. The page is written into the 
** main journal or sub-journal as required. If the page is written into
** one of the journals, the corresponding bit is set in the 
** Pager.pInJournal bitvec and the PagerSavepoint.pInSavepoint bitvecs
** of any open savepoints as appropriate.
*/
static int pager_write(PgHdr *pPg){

  Pager *pPager = pPg->pPager;
  int rc = SQLITE_OK;
  int inJournal;

  /* This routine is not called unless a write-transaction has already 
  ** been started. The journal file may or may not be open at this point.
  ** It is never called in the ERROR state.
  */
  assert( pPager->eState==PAGER_WRITER_LOCKED
       || pPager->eState==PAGER_WRITER_CACHEMOD
       || pPager->eState==PAGER_WRITER_DBMOD
  );
  assert( assert_pager_state(pPager) );



  assert( pPager->errCode==0 );



  assert( pPager->readOnly==0 );

  CHECK_PAGE(pPg);

  /* The journal file needs to be opened. Higher level routines have already
  ** obtained the necessary locks to begin the write-transaction, but the
  ** rollback journal might not yet be open. Open it now if this is the case.
  **
................................................................................
  assert( pPager->eState>=PAGER_WRITER_CACHEMOD );
  assert( assert_pager_state(pPager) );

  /* Mark the page as dirty.  If the page has already been written
  ** to the journal then we can return right away.
  */
  sqlite3PcacheMakeDirty(pPg);
  inJournal = pageInJournal(pPager, pPg);
  if( inJournal && (pPager->nSavepoint==0 || !subjRequiresPage(pPg)) ){
    assert( !pagerUseWal(pPager) );
  }else{
  
    /* The transaction journal now exists and we have a RESERVED or an
    ** EXCLUSIVE lock on the main database file.  Write the current page to
    ** the transaction journal if it is not there already.
    */
    if( !inJournal && !pagerUseWal(pPager) ){
      assert( pagerUseWal(pPager)==0 );
      if( pPg->pgno<=pPager->dbOrigSize && isOpen(pPager->jfd) ){
        u32 cksum;
        char *pData2;
        i64 iOff = pPager->journalOff;

        /* We should never write to the journal file the page that
        ** contains the database locks.  The following assert verifies
        ** that we do not. */
        assert( pPg->pgno!=PAGER_MJ_PGNO(pPager) );

        assert( pPager->journalHdr<=pPager->journalOff );
        CODEC2(pPager, pPg->pData, pPg->pgno, 7, return SQLITE_NOMEM, pData2);
        cksum = pager_cksum(pPager, (u8*)pData2);

        /* Even if an IO or diskfull error occurs while journalling the
        ** page in the block above, set the need-sync flag for the page.
        ** Otherwise, when the transaction is rolled back, the logic in
        ** playback_one_page() will think that the page needs to be restored
        ** in the database file. And if an IO error occurs while doing so,
................................................................................
    }
  
    /* If the statement journal is open and the page is not in it,
    ** then write the current page to the statement journal.  Note that
    ** the statement journal format differs from the standard journal format
    ** in that it omits the checksums and the header.
    */
    if( pPager->nSavepoint>0 && subjRequiresPage(pPg) ){
      rc = subjournalPage(pPg);
    }
  }

  /* Update the database size and return.
  */
  if( pPager->dbSize<pPg->pgno ){
................................................................................
** as appropriate. Otherwise, SQLITE_OK.
*/
SQLITE_PRIVATE int sqlite3PagerWrite(DbPage *pDbPage){
  int rc = SQLITE_OK;

  PgHdr *pPg = pDbPage;
  Pager *pPager = pPg->pPager;


  assert( (pPg->flags & PGHDR_MMAP)==0 );
  assert( pPager->eState>=PAGER_WRITER_LOCKED );
  assert( pPager->eState!=PAGER_ERROR );
  assert( assert_pager_state(pPager) );

  if( pPager->sectorSize > (u32)pPager->pageSize ){
    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 */
    Pgno nPagePerSector = (pPager->sectorSize/pPager->pageSize);

    /* Set the doNotSpill NOSYNC bit 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->doNotSpill & SPILLFLAG_NOSYNC)==0 );
................................................................................
        if( pg!=PAGER_MJ_PGNO(pPager) ){
          rc = sqlite3PagerGet(pPager, pg, &pPage);
          if( rc==SQLITE_OK ){
            rc = pager_write(pPage);
            if( pPage->flags&PGHDR_NEED_SYNC ){
              needSync = 1;
            }
            sqlite3PagerUnrefNotNull(pPage);
          }
        }
      }else if( (pPage = pager_lookup(pPager, pg))!=0 ){
        if( pPage->flags&PGHDR_NEED_SYNC ){
          needSync = 1;
        }
        sqlite3PagerUnrefNotNull(pPage);
      }
    }

    /* If the PGHDR_NEED_SYNC flag is set for any of the nPage pages 
    ** starting at pg1, then it needs to be set for all of them. Because
    ** writing to any of these nPage pages may damage the others, the
    ** journal file must contain sync()ed copies of all of them
................................................................................
    */
    if( rc==SQLITE_OK && needSync ){
      assert( !MEMDB );
      for(ii=0; ii<nPage; ii++){
        PgHdr *pPage = pager_lookup(pPager, pg1+ii);
        if( pPage ){
          pPage->flags |= PGHDR_NEED_SYNC;
          sqlite3PagerUnrefNotNull(pPage);
        }
      }
    }

    assert( (pPager->doNotSpill & SPILLFLAG_NOSYNC)!=0 );
    pPager->doNotSpill &= ~SPILLFLAG_NOSYNC;
  }else{
................................................................................
/*
** Sync the database file to disk. This is a no-op for in-memory databases
** or pages with the Pager.noSync flag set.
**
** If successful, or if called on a pager for which it is a no-op, this
** function returns SQLITE_OK. Otherwise, an IO error code is returned.
*/
SQLITE_PRIVATE int sqlite3PagerSync(Pager *pPager, const char *zMaster){
  int rc = SQLITE_OK;




  if( isOpen(pPager->fd) ){

    void *pArg = (void*)zMaster;
    rc = sqlite3OsFileControl(pPager->fd, SQLITE_FCNTL_SYNC, pArg);
    if( rc==SQLITE_NOTFOUND ) rc = SQLITE_OK;

  }
  if( rc==SQLITE_OK && !pPager->noSync ){
    assert( !MEMDB );
    rc = sqlite3OsSync(pPager->fd, pPager->syncFlags);
  }
  return rc;
}

/*
** This function may only be called while a write-transaction is active in
** rollback. If the connection is in WAL mode, this call is a no-op. 
................................................................................
        assert( pPager->eState==PAGER_WRITER_DBMOD );
        rc = pager_truncate(pPager, nNew);
        if( rc!=SQLITE_OK ) goto commit_phase_one_exit;
      }
  
      /* Finally, sync the database file. */
      if( !noSync ){
        rc = sqlite3PagerSync(pPager, zMaster);
      }
      IOTRACE(("DBSYNC %p\n", pPager))
    }
  }

commit_phase_one_exit:
  if( rc==SQLITE_OK && !pagerUseWal(pPager) ){
................................................................................
    }
  }else{
    rc = pager_playback(pPager, 0);
  }

  assert( pPager->eState==PAGER_READER || rc!=SQLITE_OK );
  assert( rc==SQLITE_OK || rc==SQLITE_FULL || rc==SQLITE_CORRUPT
          || rc==SQLITE_NOMEM || (rc&0xFF)==SQLITE_IOERR 
          || rc==SQLITE_CANTOPEN
  );

  /* If an error occurs during a ROLLBACK, we can no longer trust the pager
  ** cache. So call pager_error() on the way out to make any error persistent.
  */
  return pager_error(pPager, rc);
}

................................................................................
  ** If the isCommit flag is set, there is no need to remember that
  ** the journal needs to be sync()ed before database page pPg->pgno 
  ** can be written to. The caller has already promised not to write to it.
  */
  if( (pPg->flags&PGHDR_NEED_SYNC) && !isCommit ){
    needSyncPgno = pPg->pgno;
    assert( pPager->journalMode==PAGER_JOURNALMODE_OFF ||
            pageInJournal(pPager, pPg) || pPg->pgno>pPager->dbOrigSize );
    assert( pPg->flags&PGHDR_DIRTY );
  }

  /* If the cache contains a page with page-number pgno, remove it
  ** from its hash chain. Also, if the PGHDR_NEED_SYNC flag was set for 
  ** page pgno before the 'move' operation, it needs to be retained 
  ** for the page moved there.
................................................................................
  /* For an in-memory database, make sure the original page continues
  ** to exist, in case the transaction needs to roll back.  Use pPgOld
  ** as the original page since it has already been allocated.
  */
  if( MEMDB ){
    assert( pPgOld );
    sqlite3PcacheMove(pPgOld, origPgno);
    sqlite3PagerUnrefNotNull(pPgOld);
  }

  if( needSyncPgno ){
    /* If needSyncPgno is non-zero, then the journal file needs to be 
    ** sync()ed before any data is written to database file page needSyncPgno.
    ** Currently, no such page exists in the page-cache and the 
    ** "is journaled" bitvec flag has been set. This needs to be remedied by
................................................................................
        assert( pPager->pTmpSpace!=0 );
        sqlite3BitvecClear(pPager->pInJournal, needSyncPgno, pPager->pTmpSpace);
      }
      return rc;
    }
    pPgHdr->flags |= PGHDR_NEED_SYNC;
    sqlite3PcacheMakeDirty(pPgHdr);
    sqlite3PagerUnrefNotNull(pPgHdr);
  }

  return SQLITE_OK;
}
#endif

/*
................................................................................
  assert( sqlite3_mutex_held(pBt->mutex) );
  assert( bReadonly==PAGER_GET_READONLY || bReadonly==0 );

  if( pgno>btreePagecount(pBt) ){
    rc = SQLITE_CORRUPT_BKPT;
  }else{
    rc = btreeGetPage(pBt, pgno, ppPage, bReadonly);
    if( rc==SQLITE_OK && (*ppPage)->isInit==0 ){
      rc = btreeInitPage(*ppPage);
      if( rc!=SQLITE_OK ){
        releasePage(*ppPage);
      }
    }
  }

................................................................................
** Release a MemPage.  This should be called once for each prior
** call to btreeGetPage.
*/
static void releasePage(MemPage *pPage){
  if( pPage ){
    assert( pPage->aData );
    assert( pPage->pBt );
    assert( pPage->pDbPage!=0 );
    assert( sqlite3PagerGetExtra(pPage->pDbPage) == (void*)pPage );
    assert( sqlite3PagerGetData(pPage->pDbPage)==pPage->aData );
    assert( sqlite3_mutex_held(pPage->pBt->mutex) );
    sqlite3PagerUnrefNotNull(pPage->pDbPage);
  }
}

/*
** During a rollback, when the pager reloads information into the cache
** so that the cache is restored to its original state at the start of
** the transaction, for each page restored this routine is called.
................................................................................
  }
  return rc;
}

/*
** Return a pointer to payload information from the entry that the 
** pCur cursor is pointing to.  The pointer is to the beginning of
** the key if index btrees (pPage->intKey==0) and is the data for
** table btrees (pPage->intKey==1). The number of bytes of available
** key/data is written into *pAmt.  If *pAmt==0, then the value
** returned will not be a valid pointer.
**
** This routine is an optimization.  It is common for the entire key
** and data to fit on the local page and for there to be no overflow
** pages.  When that is so, this routine can be used to access the
** key and data without making a copy.  If the key and/or data spills
** onto overflow pages, then accessPayload() must be used to reassemble
** the key/data and copy it into a preallocated buffer.
**
** The pointer returned by this routine looks directly into the cached
** page of the database.  The data might change or move the next time
** any btree routine is called.
*/
static const void *fetchPayload(
  BtCursor *pCur,      /* Cursor pointing to entry to read from */
  u32 *pAmt            /* Write the number of available bytes here */

){





  assert( pCur!=0 && pCur->iPage>=0 && pCur->apPage[pCur->iPage]);
  assert( pCur->eState==CURSOR_VALID );
  assert( sqlite3_mutex_held(pCur->pBtree->db->mutex) );
  assert( cursorHoldsMutex(pCur) );

  assert( pCur->aiIdx[pCur->iPage]<pCur->apPage[pCur->iPage]->nCell );
  if( pCur->info.nSize==0 ){
    btreeParseCell(pCur->apPage[pCur->iPage], pCur->aiIdx[pCur->iPage],
                   &pCur->info);
  }











  *pAmt = pCur->info.nLocal;




  return (void*)(pCur->info.pCell + pCur->info.nHeader);
}


/*
** For the entry that cursor pCur is point to, return as
** many bytes of the key or data as are available on the local
** b-tree page.  Write the number of available bytes into *pAmt.
................................................................................
** Hence, a mutex on the BtShared should be held prior to calling
** this routine.
**
** These routines is used to get quick access to key and data
** in the common case where no overflow pages are used.
*/
SQLITE_PRIVATE const void *sqlite3BtreeKeyFetch(BtCursor *pCur, u32 *pAmt){




  return fetchPayload(pCur, pAmt);
}


SQLITE_PRIVATE const void *sqlite3BtreeDataFetch(BtCursor *pCur, u32 *pAmt){




  return fetchPayload(pCur, pAmt);


}


/*
** Move the cursor down to a new child page.  The newPgno argument is the
** page number of the child page to move to.
**
................................................................................
** indicating a table b-tree, or if the caller did specify a KeyInfo 
** structure the flags byte is set to 0x02 or 0x0A, indicating an index
** b-tree).
*/
static int moveToRoot(BtCursor *pCur){
  MemPage *pRoot;
  int rc = SQLITE_OK;



  assert( cursorHoldsMutex(pCur) );
  assert( CURSOR_INVALID < CURSOR_REQUIRESEEK );
  assert( CURSOR_VALID   < CURSOR_REQUIRESEEK );
  assert( CURSOR_FAULT   > CURSOR_REQUIRESEEK );
  if( pCur->eState>=CURSOR_REQUIRESEEK ){
    if( pCur->eState==CURSOR_FAULT ){
................................................................................
      assert( pCur->skipNext!=SQLITE_OK );
      return pCur->skipNext;
    }
    sqlite3BtreeClearCursor(pCur);
  }

  if( pCur->iPage>=0 ){


    while( pCur->iPage ) releasePage(pCur->apPage[pCur->iPage--]);


  }else if( pCur->pgnoRoot==0 ){
    pCur->eState = CURSOR_INVALID;
    return SQLITE_OK;
  }else{
    rc = getAndInitPage(pCur->pBtree->pBt, pCur->pgnoRoot, &pCur->apPage[0],
                        pCur->wrFlag==0 ? PAGER_GET_READONLY : 0);
    if( rc!=SQLITE_OK ){
      pCur->eState = CURSOR_INVALID;
      return rc;
    }
    pCur->iPage = 0;

................................................................................
  assert( pRoot->isInit && (pCur->pKeyInfo==0)==pRoot->intKey );

  pCur->aiIdx[0] = 0;
  pCur->info.nSize = 0;
  pCur->atLast = 0;
  pCur->validNKey = 0;

  if( pRoot->nCell>0 ){
    pCur->eState = CURSOR_VALID;
  }else if( !pRoot->leaf ){
    Pgno subpage;
    if( pRoot->pgno!=1 ) return SQLITE_CORRUPT_BKPT;
    subpage = get4byte(&pRoot->aData[pRoot->hdrOffset+8]);
    pCur->eState = CURSOR_VALID;
    rc = moveToChild(pCur, subpage);
  }else{
    pCur->eState = CURSOR_INVALID;
  }
  return rc;
}

/*
** Move the cursor down to the left-most leaf entry beneath the
** entry to which it is currently pointing.
................................................................................
        ** page is less than 16384 bytes and may be stored as a 2-byte
        ** varint. This information is used to attempt to avoid parsing 
        ** the entire cell by checking for the cases where the record is 
        ** stored entirely within the b-tree page by inspecting the first 
        ** 2 bytes of the cell.
        */
        nCell = pCell[0];
        if( nCell<=pPage->max1bytePayload ){


          /* This branch runs if the record-size field of the cell is a
          ** single byte varint and the record fits entirely on the main
          ** b-tree page.  */
          testcase( pCell+nCell+1==pPage->aDataEnd );
          c = sqlite3VdbeRecordCompare(nCell, (void*)&pCell[1], pIdxKey);
        }else if( !(pCell[1] & 0x80) 
          && (nCell = ((nCell&0x7f)<<7) + pCell[1])<=pPage->maxLocal

        ){
          /* The record-size field is a 2 byte varint and the record 
          ** fits entirely on the main b-tree page.  */
          testcase( pCell+nCell+2==pPage->aDataEnd );
          c = sqlite3VdbeRecordCompare(nCell, (void*)&pCell[2], pIdxKey);
        }else{
          /* The record flows over onto one or more overflow pages. In
................................................................................

  /* Fill in the header. */
  nHeader = 0;
  if( !pPage->leaf ){
    nHeader += 4;
  }
  if( pPage->hasData ){
    nHeader += putVarint32(&pCell[nHeader], nData+nZero);
  }else{
    nData = nZero = 0;
  }
  nHeader += putVarint(&pCell[nHeader], *(u64*)&nKey);
  btreeParseCellPtr(pPage, pCell, &info);
  assert( info.nHeader==nHeader );
  assert( info.nKey==nKey );
................................................................................
**
** "sz" must be the number of bytes in the cell.
*/
static void dropCell(MemPage *pPage, int idx, int sz, int *pRC){
  u32 pc;         /* Offset to cell content of cell being deleted */
  u8 *data;       /* pPage->aData */
  u8 *ptr;        /* Used to move bytes around within data[] */

  int rc;         /* The return code */
  int hdr;        /* Beginning of the header.  0 most pages.  100 page 1 */

  if( *pRC ) return;

  assert( idx>=0 && idx<pPage->nCell );
  assert( sz==cellSize(pPage, idx) );
................................................................................
    return;
  }
  rc = freeSpace(pPage, pc, sz);
  if( rc ){
    *pRC = rc;
    return;
  }






  pPage->nCell--;
  memmove(ptr, ptr+2, 2*(pPage->nCell - idx));
  put2byte(&data[hdr+3], pPage->nCell);
  pPage->nFree += 2;
}

/*
** Insert a new cell on pPage at cell index "i".  pCell points to the
** content of the cell.
................................................................................
){
  int idx = 0;      /* Where to write new cell content in data[] */
  int j;            /* Loop counter */
  int end;          /* First byte past the last cell pointer in data[] */
  int ins;          /* Index in data[] where new cell pointer is inserted */
  int cellOffset;   /* Address of first cell pointer in data[] */
  u8 *data;         /* The content of the whole page */



  int nSkip = (iChild ? 4 : 0);

  if( *pRC ) return;

  assert( i>=0 && i<=pPage->nCell+pPage->nOverflow );
  assert( pPage->nCell<=MX_CELL(pPage->pBt) && MX_CELL(pPage->pBt)<=10921 );
  assert( pPage->nOverflow<=ArraySize(pPage->apOvfl) );
................................................................................
    assert( idx+sz <= (int)pPage->pBt->usableSize );
    pPage->nCell++;
    pPage->nFree -= (u16)(2 + sz);
    memcpy(&data[idx+nSkip], pCell+nSkip, sz-nSkip);
    if( iChild ){
      put4byte(&data[idx], iChild);
    }
    memmove(&data[ins+2], &data[ins], end-ins);






    put2byte(&data[ins], idx);
    put2byte(&data[pPage->hdrOffset+3], pPage->nCell);
#ifndef SQLITE_OMIT_AUTOVACUUM
    if( pPage->pBt->autoVacuum ){
      /* The cell may contain a pointer to an overflow page. If so, write
      ** the entry for the overflow page into the pointer map.
      */
................................................................................
  int freePageFlag,        /* Deallocate page if true */
  int *pnChange            /* Add number of Cells freed to this counter */
){
  MemPage *pPage;
  int rc;
  unsigned char *pCell;
  int i;
  int hdr;

  assert( sqlite3_mutex_held(pBt->mutex) );
  if( pgno>btreePagecount(pBt) ){
    return SQLITE_CORRUPT_BKPT;
  }

  rc = getAndInitPage(pBt, pgno, &pPage, 0);
  if( rc ) return rc;
  hdr = pPage->hdrOffset;
  for(i=0; i<pPage->nCell; i++){
    pCell = findCell(pPage, i);
    if( !pPage->leaf ){
      rc = clearDatabasePage(pBt, get4byte(pCell), 1, pnChange);
      if( rc ) goto cleardatabasepage_out;
    }
    rc = clearCell(pPage, pCell);
    if( rc ) goto cleardatabasepage_out;
  }
  if( !pPage->leaf ){
    rc = clearDatabasePage(pBt, get4byte(&pPage->aData[hdr+8]), 1, pnChange);
    if( rc ) goto cleardatabasepage_out;
  }else if( pnChange ){
    assert( pPage->intKey );
    *pnChange += pPage->nCell;
  }
  if( freePageFlag ){
    freePage(pPage, &rc);
  }else if( (rc = sqlite3PagerWrite(pPage->pDbPage))==0 ){
    zeroPage(pPage, pPage->aData[hdr] | PTF_LEAF);
  }

cleardatabasepage_out:
  releasePage(pPage);
  return rc;
}

................................................................................
  pCheck->mxErr--;
  pCheck->nErr++;
  va_start(ap, zFormat);
  if( pCheck->errMsg.nChar ){
    sqlite3StrAccumAppend(&pCheck->errMsg, "\n", 1);
  }
  if( zMsg1 ){
    sqlite3StrAccumAppendAll(&pCheck->errMsg, zMsg1);
  }
  sqlite3VXPrintf(&pCheck->errMsg, 1, zFormat, ap);
  va_end(ap);
  if( pCheck->errMsg.accError==STRACCUM_NOMEM ){
    pCheck->mallocFailed = 1;
  }
}
................................................................................
          }
          if( rc==SQLITE_OK ){
            rc = backupTruncateFile(pFile, iSize);
          }

          /* Sync the database file to disk. */
          if( rc==SQLITE_OK ){
            rc = sqlite3PagerSync(pDestPager, 0);
          }
        }else{
          sqlite3PagerTruncateImage(pDestPager, nDestTruncate);
          rc = sqlite3PagerCommitPhaseOne(pDestPager, 0, 0);
        }
    
        /* Finish committing the transaction to the destination database. */
................................................................................
  }

  /* If a transaction is still open on the Btree, roll it back. */
  sqlite3BtreeRollback(p->pDest, SQLITE_OK);

  /* Set the error code of the destination database handle. */
  rc = (p->rc==SQLITE_DONE) ? SQLITE_OK : p->rc;
  if( p->pDestDb ){
    sqlite3Error(p->pDestDb, rc, 0);

    /* Exit the mutexes and free the backup context structure. */

    sqlite3LeaveMutexAndCloseZombie(p->pDestDb);
  }
  sqlite3BtreeLeave(p->pSrc);
  if( p->pDestDb ){
    /* EVIDENCE-OF: R-64852-21591 The sqlite3_backup object is created by a
    ** call to sqlite3_backup_init() and is destroyed by a call to
    ** sqlite3_backup_finish(). */
................................................................................
  assert(rc==SQLITE_NOMEM || pMem->enc==desiredEnc);
  return rc;
#endif
}

/*
** Make sure pMem->z points to a writable allocation of at least 
** min(n,32) bytes.
**
** If the bPreserve argument is true, then copy of the content of
** pMem->z into the new allocation.  pMem must be either a string or
** blob if bPreserve is true.  If bPreserve is false, any prior content
** in pMem->z is discarded.




*/
SQLITE_PRIVATE int sqlite3VdbeMemGrow(Mem *pMem, int n, int bPreserve){
  assert( 1 >=
    ((pMem->zMalloc && pMem->zMalloc==pMem->z) ? 1 : 0) +
    (((pMem->flags&MEM_Dyn)&&pMem->xDel) ? 1 : 0) + 
    ((pMem->flags&MEM_Ephem) ? 1 : 0) + 
    ((pMem->flags&MEM_Static) ? 1 : 0)
  );
  assert( (pMem->flags&MEM_RowSet)==0 );

  /* If the bPreserve flag is set to true, then the memory cell must already
  ** contain a valid string or blob value.  */
  assert( bPreserve==0 || pMem->flags&(MEM_Blob|MEM_Str) );
  testcase( bPreserve && pMem->z==0 );

  if( pMem->zMalloc==0 || sqlite3DbMallocSize(pMem->db, pMem->zMalloc)<n ){
    if( n<32 ) n = 32;

    if( bPreserve && pMem->z==pMem->zMalloc ){
      pMem->z = pMem->zMalloc = sqlite3DbReallocOrFree(pMem->db, pMem->z, n);
      bPreserve = 0;
    }else{
      sqlite3DbFree(pMem->db, pMem->zMalloc);
      pMem->zMalloc = sqlite3DbMallocRaw(pMem->db, n);
    }
    if( pMem->zMalloc==0 ){
      sqlite3VdbeMemRelease(pMem);
      pMem->flags = MEM_Null;  
      return SQLITE_NOMEM;
    }
  }


  if( pMem->z && bPreserve && pMem->z!=pMem->zMalloc ){
    memcpy(pMem->zMalloc, pMem->z, pMem->n);
  }
  if( (pMem->flags&MEM_Dyn)!=0 && pMem->xDel ){
    assert( pMem->xDel!=SQLITE_DYNAMIC );
    pMem->xDel((void *)(pMem->z));
  }

  pMem->z = pMem->zMalloc;



  pMem->flags &= ~(MEM_Ephem|MEM_Static);

  pMem->xDel = 0;

  return SQLITE_OK;
}

/*
** Make the given Mem object MEM_Dyn.  In other words, make it so
** that any TEXT or BLOB content is stored in memory obtained from
** malloc().  In this way, we know that the memory is safe to be
** overwritten or altered.
................................................................................
/*
** Release any memory held by the Mem. This may leave the Mem in an
** inconsistent state, for example with (Mem.z==0) and
** (Mem.type==SQLITE_TEXT).
*/
SQLITE_PRIVATE void sqlite3VdbeMemRelease(Mem *p){
  VdbeMemRelease(p);
  if( p->zMalloc ){
    sqlite3DbFree(p->db, p->zMalloc);

    p->zMalloc = 0;
  }
  p->z = 0;
  assert( p->xDel==0 );  /* Zeroed by VdbeMemRelease() above */
}

/*
** Convert a 64-bit IEEE double into a 64-