System.Data.SQLite

        </font>
      </p>
      <table width="80%" cellpadding="0" cellspacing="0">
        <tr valign="top">
          <th>Name</th>
          <th>Description</th>
        </tr>
        <tr valign="top">
          <td>AppendManifestToken_SQLiteProviderManifest</td>
          <td>If this environment variable is set [to anything], it will be
          used by the System.Data.SQLite.Linq.SQLiteProviderManifest class
          (and the System.Data.SQLite.EF6.SQLiteProviderManifest class) to
          modify future provider manifest tokens by appending the value of
          the environment variable to the existing provider manifest token,
          if any.  Typically, in order for the constructed provider manifest
          token to be syntactically correct, the environment variable value
          [to be appended] must begin with a semicolon.</td>
        </tr>
        <tr valign="top">
          <td>Force_SQLiteLog</td>
          <td>If this environment variable is set [to anything], the SQLite
          logging subsystem may be initialized in a non-default application
          domain.  By default, this is not allowed due to the potential for
          application domain unloading issues.</td>
        </tr>

          <td>PROCESSOR_ARCHITECTURE</td>
          <td>This environment variable is normally set by the operating
          system itself and should reflect the native processor architecture
          of the current process (e.g. a 32-bit x86 application running on a
          64-bit x64 operating system should have the value &quot;x86&quot;).
          </td>
        </tr>
        <tr valign="top">
          <td>SQLite_ForceLogPrepare</td>
          <td>If this environment variable is set [to anything], all calls to
          prepare a SQL query will be logged, regardless of the flags for the
          associated connection.</td>
        </tr>
        <tr valign="top">
          <td>TypeName_SQLiteProviderServices</td>
          <td>If this environment variable is set [to anything], it will be
          used by the System.Data.SQLite.SQLiteFactory class as the type name
          containing the System.Data.Common.DbProviderServices implementation
          that should be used.</td>
        </tr>

      <li>Defer disposing of connections created by the static SQLiteCommand.Execute method when a data reader is returned. Fix for <a href="http://system.data.sqlite.org/index.html/info/daeaf3150a">[daeaf3150a]</a>.</li>
      <li>Wrap SELECT statements in parenthesis if they have an ORDER BY, LIMIT, or OFFSET clause and a compound operator is involved. Fix for <a href="http://system.data.sqlite.org/index.html/info/0a32885109">[0a32885109]</a>.</li>
      <li>In the SQLiteDataReader.VerifyType method, remove duplicate &quot;if&quot; statement for the DbType.SByte value and move the remaining &quot;if&quot; to the Int64 affinity. Fix for <a href="http://system.data.sqlite.org/index.html/info/c5cc2fb334">[c5cc2fb334]</a>.&nbsp;<b>** Potentially Incompatible Change **</b></li>
      <li>Handle Julian Day values that fall outside of the supported range for OLE Automation dates. Fix for <a href="http://system.data.sqlite.org/index.html/info/3e783eecbe">[3e783eecbe]</a>.&nbsp;<b>** Potentially Incompatible Change **</b></li>
      <li>Make sure the interop files are copied when publishing a project that refers to a NuGet package containing them. Fix for <a href="http://system.data.sqlite.org/index.html/info/e796ac82c1">[e796ac82c1]</a>.&nbsp;<b>** Potentially Incompatible Change **</b></li>
      <li>Make sure the interop files are copied before the PostBuildEvent. Fix for <a href="http://system.data.sqlite.org/index.html/info/f16c93a932">[f16c93a932]</a>.&nbsp;<b>** Potentially Incompatible Change **</b></li>
      <li>Modify GetSchemaTable method to avoid setting SchemaTableColumn.IsKey column to true when more than one table is referenced. Fix for <a href="http://system.data.sqlite.org/index.html/info/47c6fa04d3">[47c6fa04d3]</a>.&nbsp;<b>** Potentially Incompatible Change **</b></li>
      <li>Add AppendManifestToken_SQLiteProviderManifest environment variable to enable better integration between LINQ and the underlying store connection.</li>
      <li>Add SQLite_ForceLogPrepare environment variable to force logging of all prepared SQL regardless of the flags for the associated connection.</li>
      <li>Honor the DateTimeFormat, DateTimeKind, DateTimeFormatString, BinaryGUID connection string and/or provider manifest token properties from within the LINQ assembly. Fix for <a href="http://system.data.sqlite.org/index.html/info/8d928c3e88">[8d928c3e88]</a>.&nbsp;<b>** Potentially Incompatible Change **</b></li>
    </ul>
    <p><b>1.0.94.0 - September 9, 2014</b></p>
    <ul>
      <li>Updated to <a href="http://www.sqlite.org/releaselog/3_8_6.html">SQLite 3.8.6</a>.</li>
      <li>Updated to <a href="http://www.nuget.org/packages/EntityFramework/6.1.1">Entity Framework 6.1.1</a>.</li>
      <li>Refactor and simplify NuGet packages in order to support per-solution SQLite interop assembly files.&nbsp;<b>** Potentially Incompatible Change **</b></li>
      <li>Add RefreshFlags method to the SQLiteDataReader class to forcibly refresh its connection flags.</li>

    <AssociationSet Name="STableConstraints" Association="Self.TableTableConstraint" >
      <End Role="Parent" EntitySet="STables"/>
      <End Role="Constraint" EntitySet="SConstraints"/>
    </AssociationSet>
    <AssociationSet Name="SConstraintConstraintColumns" Association="Self.ConstraintConstraintColumn" >
      <End Role="ConstraintColumn" EntitySet="SConstraintColumns"/>
      <End Role="Constraint" EntitySet="SConstraints"/>
    </AssociationSet>
    <AssociationSet Name="SConstraintForeignKeys" Association="Self.ConstraintForeignKey" >
      <End Role="ForeignKey" EntitySet="SForeignKeys"/>
      <End Role="Constraint" EntitySet="SForeignKeyConstraints"/>
    </AssociationSet>
    <AssociationSet Name="SFromForeignKeyColumns" Association="Self.FromForeignKeyColumn" >
      <End Role="ForeignKey" EntitySet="SForeignKeys"/>
      <End Role="Column" EntitySet="STableColumns"/>

  <EntityType Name="CheckConstraint">
    <Key>
      <PropertyRef Name="Id" />
    </Key>
    <Property Name="Id" Nullable="false" Type="nvarchar" />
    <Property Name="Expression" Nullable="true" Type="nvarchar" />
  </EntityType>

  <EntityType Name="ConstraintColumn">
    <Key>
      <PropertyRef Name="ConstraintId" />
      <PropertyRef Name="ColumnId" />
    </Key>
    <Property Name="ConstraintId" Nullable="false" Type="nvarchar" />
    <Property Name="ColumnId" Nullable="false" Type="nvarchar" />

<?xml version="1.0" encoding="utf-8"?>
<Schema Namespace="EFSQLite" Provider="System.Data.SQLite.Linq" ProviderManifestToken="ISO8601" Alias="Self" xmlns="http://schemas.microsoft.com/ado/2006/04/edm/ssdl">
  <EntityContainer Name="Schema">
    <EntitySet Name="STables" EntityType="Self.Table">
      <DefiningQuery>
        SELECT
        '[' || TABLE_NAME || ']' COLLATE NOCASE [Id]
        ,   TABLE_CATALOG [CatalogName]
        ,   TABLE_SCHEMA [SchemaName]

    <AssociationSet Name="STableConstraints" Association="Self.TableTableConstraint" >
      <End Role="Parent" EntitySet="STables"/>
      <End Role="Constraint" EntitySet="SConstraints"/>
    </AssociationSet>
    <AssociationSet Name="SConstraintConstraintColumns" Association="Self.ConstraintConstraintColumn" >
      <End Role="ConstraintColumn" EntitySet="SConstraintColumns"/>
      <End Role="Constraint" EntitySet="SConstraints"/>
    </AssociationSet>
    <AssociationSet Name="SConstraintForeignKeys" Association="Self.ConstraintForeignKey" >
      <End Role="ForeignKey" EntitySet="SForeignKeys"/>
      <End Role="Constraint" EntitySet="SForeignKeyConstraints"/>
    </AssociationSet>
    <AssociationSet Name="SFromForeignKeyColumns" Association="Self.FromForeignKeyColumn" >
      <End Role="ForeignKey" EntitySet="SForeignKeys"/>
      <End Role="Column" EntitySet="STableColumns"/>

  <EntityType Name="CheckConstraint">
    <Key>
      <PropertyRef Name="Id" />
    </Key>
    <Property Name="Id" Nullable="false" Type="nvarchar" />
    <Property Name="Expression" Nullable="true" Type="nvarchar" />
  </EntityType>

  <EntityType Name="ConstraintColumn">
    <Key>
      <PropertyRef Name="ConstraintId" />
      <PropertyRef Name="ColumnId" />
    </Key>
    <Property Name="ConstraintId" Nullable="false" Type="nvarchar" />
    <Property Name="ColumnId" Nullable="false" Type="nvarchar" />

          else
          {
            ISqlFragment sqlFragment = (o as ISqlFragment);
            if (null != sqlFragment)
            {
              sqlFragment.WriteSql(writer, sqlGenerator);
            }
            else if (o is char)
            {
              writer.Write((char)o);
            }
            else
            {
              throw new InvalidOperationException();
            }
          }
        }
      }

  /// Renaming issues.
  /// When rows or columns are renamed, we produce names that are unique globally
  /// with respect to the query.  The names are derived from the original names,
  /// with an integer as a suffix. e.g. CustomerId will be renamed to CustomerId1,
  /// CustomerId2 etc.
  ///
  /// Since the names generated are globally unique, they will not conflict when the
  /// columns of a JOIN SELECT statement are joined with another JOIN.
  ///
  /// </para>
  ///
  /// <para>
  /// Record flattening.
  /// SQL server does not have the concept of records.  However, a join statement
  /// produces records.  We have to flatten the record accesses into a simple

      return functionNameToOperatorDictionary;
    }

    #endregion

    #region Constructor
    /// <summary>
    /// Basic constructor.
    /// </summary>
    private SqlGenerator(SQLiteProviderManifest manifest)
    {
      _manifest = manifest;
    }
    #endregion

      //Handle Query
      DbQueryCommandTree queryCommandTree = tree as DbQueryCommandTree;
      if (queryCommandTree != null)
      {
        SqlGenerator sqlGen = new SqlGenerator(manifest);
        parameters = null;

        string sql = sqlGen.GenerateSql((DbQueryCommandTree)tree);

        return sql;
      }

      //Handle Function
      DbFunctionCommandTree DbFunctionCommandTree = tree as DbFunctionCommandTree;

        switch (typeKind)
        {
          case PrimitiveTypeKind.Int32:
            result.Append(e.Value.ToString());
            break;

          case PrimitiveTypeKind.Binary:

            ToBlobLiteral((byte[])e.Value, result);

            break;

          case PrimitiveTypeKind.Boolean:
            result.Append((bool)e.Value ? "1" : "0");
            break;

          case PrimitiveTypeKind.Byte:
            result.Append(e.Value.ToString());
            break;

          case PrimitiveTypeKind.DateTime:
            bool needQuotes = NeedSingleQuotes(_manifest._dateTimeFormat);

            string dateString = SQLiteConvert.ToString(
                (System.DateTime)e.Value, _manifest._dateTimeFormat,
                _manifest._dateTimeKind, _manifest._dateTimeFormatString);

            if (needQuotes)
            {
                result.Append(EscapeSingleQuote(
                    dateString, false /* IsUnicode */));
            }
            else
            {
                result.Append(dateString);
            }
            break;

          case PrimitiveTypeKind.Decimal:
            string strDecimal = ((Decimal)e.Value).ToString(CultureInfo.InvariantCulture);
            // if the decimal value has no decimal part, cast as decimal to preserve type
            // if the number has precision > int64 max precision, it will be handled as decimal by sql server
            // and does not need cast. if precision is lest then 20, then cast using Max(literal precision, sql default precision)

            break;

          case PrimitiveTypeKind.Double:
            result.Append(((Double)e.Value).ToString(CultureInfo.InvariantCulture));
            break;

          case PrimitiveTypeKind.Guid:
            {
                object value = e.Value;

                if (_manifest._binaryGuid && (value is Guid))
                    ToBlobLiteral(((Guid)value).ToByteArray(), result);
                else
                    result.Append(EscapeSingleQuote(e.Value.ToString(), false /* IsUnicode */));
            }
            break;

          case PrimitiveTypeKind.Int16:
            result.Append(e.Value.ToString());
            break;

          case PrimitiveTypeKind.Int64:

    /// Lambda functions are not supported.
    /// The functions supported are:
    /// <list type="number">
    /// <item>Canonical Functions - We recognize these by their dataspace, it is DataSpace.CSpace</item>
    /// <item>Store Functions - We recognize these by the BuiltInAttribute and not being Canonical</item>
    /// <item>User-defined Functions - All the rest except for Lambda functions</item>
    /// </list>
    /// We handle Canonical and Store functions the same way: If they are in the list of functions
    /// that need special handling, we invoke the appropriate handler, otherwise we translate them to
    /// FunctionName(arg1, arg2, ..., argn).
    /// We translate user-defined functions to NamespaceName.FunctionName(arg1, arg2, ..., argn).
    /// </summary>
    /// <param name="e"></param>
    /// <returns>A <see cref="SqlBuilder"/></returns>
    public override ISqlFragment Visit(DbFunctionExpression e)

    }

    /// <summary>
    /// <see cref="Visit(DbFilterExpression)"/> for general details.
    /// We modify both the GroupBy and the Select fields of the SqlSelectStatement.
    /// GroupBy gets just the keys without aliases,
    /// and Select gets the keys and the aggregates with aliases.
    ///
    /// Whenever there exists at least one aggregate with an argument that is not is not a simple
    /// <see cref="DbPropertyExpression"/>  over <see cref="DbVariableReferenceExpression"/>,
    /// we create a nested query in which we alias the arguments to the aggregates.
    /// That is due to the following two limitations of Sql Server:
    /// <list type="number">
    /// <item>If an expression being aggregated contains an outer reference, then that outer
    /// reference must be the only column referenced in the expression </item>
    /// <item>Sql Server cannot perform an aggregate function on an expression containing
    /// an aggregate or a subquery. </item>
    /// </list>
    ///
    /// The default translation, without inner query is:
    ///
    ///     SELECT
    ///         kexp1 AS key1, kexp2 AS key2,... kexpn AS keyn,
    ///         aggf1(aexpr1) AS agg1, .. aggfn(aexprn) AS aggn
    ///     FROM input AS a
    ///     GROUP BY kexp1, kexp2, .. kexpn
    ///
    /// When we inject an innner query, the equivalent translation is:
    ///
    ///     SELECT
    ///         key1 AS key1, key2 AS key2, .. keyn AS keys,
    ///         aggf1(agg1) AS agg1, aggfn(aggn) AS aggn
    ///     FROM (
    ///             SELECT
    ///                 kexp1 AS key1, kexp2 AS key2,... kexpn AS keyn,
    ///                 aexpr1 AS agg1, .. aexprn AS aggn
    ///             FROM input AS a
    ///         ) as a
    ///     GROUP BY key1, key2, keyn
    ///
    /// </summary>
    /// <param name="e"></param>
    /// <returns>A <see cref="SqlSelectStatement"/></returns>
    public override ISqlFragment Visit(DbGroupByExpression e)
    {
      Symbol fromSymbol;
      //SqlSelectStatement result = VisitInputExpression(e.Input.Expression,

      symbolTable.Add(e.Input.GroupVariableName, fromSymbol);


      // The enumerator is shared by both the keys and the aggregates,
      // so, we do not close it in between.
      RowType groupByType = MetadataHelpers.GetEdmType<RowType>(MetadataHelpers.GetEdmType<CollectionType>(e.ResultType).TypeUsage);

      //Whenever there exists at least one aggregate with an argument that is not simply a PropertyExpression
      // over a VarRefExpression, we need a nested query in which we alias the arguments to the aggregates.
      bool needsInnerQuery = NeedsInnerQuery(e.Aggregates);

      SqlSelectStatement result;
      if (needsInnerQuery)
      {
        //Create the inner query

            // The inner query contains the default translation Key AS Alias
            innerQuery.Select.Append(separator);
            innerQuery.Select.AppendLine();
            innerQuery.Select.Append(keySql);
            innerQuery.Select.Append(" AS ");
            innerQuery.Select.Append(alias);

            //The outer resulting query projects over the key aliased in the inner query:
            //  fromSymbol.Alias AS Alias
            result.Select.Append(separator);
            result.Select.AppendLine();
            result.Select.Append(fromSymbol);
            result.Select.Append(".");
            result.Select.Append(alias);
            result.Select.Append(" AS ");

    public override ISqlFragment Visit(DbLikeExpression e)
    {
      SqlBuilder result = new SqlBuilder();
      result.Append(e.Argument.Accept(this));
      result.Append(" LIKE ");
      result.Append(e.Pattern.Accept(this));

      // if the ESCAPE expression is a DbNullExpression, then that's tantamount to
      // not having an ESCAPE at all
      if (e.Escape.ExpressionKind != DbExpressionKind.Null)
      {
        result.Append(" ESCAPE ");
        result.Append(e.Escape.Accept(this));
      }

      throw new NotSupportedException();
    }

    /// <summary>
    /// For Sql9 it translates to:
    /// SELECT Y.x1, Y.x2, ..., Y.xn
    /// FROM (
    ///     SELECT X.x1, X.x2, ..., X.xn, row_number() OVER (ORDER BY sk1, sk2, ...) AS [row_number]
    ///     FROM input as X
    ///     ) as Y
    /// WHERE Y.[row_number] > count
    /// ORDER BY sk1, sk2, ...
    /// </summary>
    /// <param name="e"></param>
    /// <returns>A <see cref="SqlBuilder"/></returns>
    public override ISqlFragment Visit(DbSkipExpression e)
    {
        Debug.Assert(e.Count is DbConstantExpression || e.Count is DbParameterReferenceExpression, "DbLimitExpression.Count is of invalid expression type");

        throw new InvalidOperationException("Special handling should be called only for functions in the list of special functions");

      return handlers[e.Function.Name](this, e);
    }

    /// <summary>
    /// Handles functions that are translated into TSQL operators.
    /// The given function should have one or two arguments.
    /// Functions with one arguemnt are translated into
    ///     op arg
    /// Functions with two arguments are translated into
    ///     arg0 op arg1
    /// Also, the arguments can be optionaly enclosed in parethesis
    /// </summary>
    /// <param name="e"></param>
    /// <param name="parenthesiseArguments">Whether the arguments should be enclosed in parethesis</param>

    }

    private static ISqlFragment HandleGetDateFunction(SqlGenerator sqlgen, DbFunctionExpression e)
    {
      SqlBuilder result = new SqlBuilder();
      Debug.Assert(e.Arguments.Count == 0, "Canonical getdate function should have no arguments");

      switch (sqlgen._manifest._dateTimeFormat)
      {
        case SQLiteDateFormats.Ticks:
          result.Append("(STRFTIME('%s', 'now') * 10000000 + 621355968000000000)");
          break;
        case SQLiteDateFormats.JulianDay:
          result.Append("CAST(STRFTIME('%J', 'now') AS double)");
          break;
        default:
          result.Append("STRFTIME('%Y-%m-%d %H:%M:%S', 'now')");
          break;
      }

      return result;
    }

    private static ISqlFragment HandleGetUtcDateFunction(SqlGenerator sqlgen, DbFunctionExpression e)
    {
      SqlBuilder result = new SqlBuilder();
      Debug.Assert(e.Arguments.Count == 0, "Canonical getutcdate function should have no arguments");

      switch (sqlgen._manifest._dateTimeFormat)
      {
        case SQLiteDateFormats.Ticks:
          result.Append("(STRFTIME('%s', 'now', 'utc') * 10000000 + 621355968000000000)");
          break;
        case SQLiteDateFormats.JulianDay:
          result.Append("CAST(STRFTIME('%J', 'now', 'utc') AS double)");
          break;

      {
        result.Append("CAST(STRFTIME('");

        // expand the datepart literal as tsql kword
        result.Append(trans);
        result.Append("', ");

        switch (sqlgen._manifest._dateTimeFormat)
        {
          case SQLiteDateFormats.Ticks:
            result.Append(String.Format("(({0} - 621355968000000000) / 10000000.0)", e.Arguments[1].Accept(sqlgen)));
            break;
          default:
            result.Append(e.Arguments[1].Accept(sqlgen));
            break;
        }

        result.Append(") AS integer)");
      }
      else
      {
        result.Append("CAST(SUBSTR(STRFTIME('%f', ");

        switch (sqlgen._manifest._dateTimeFormat)
        {
          case SQLiteDateFormats.Ticks:
            result.Append(String.Format("(({0} - 621355968000000000) / 10000000.0)", e.Arguments[1].Accept(sqlgen)));
            break;
          default:
            result.Append(e.Arguments[1].Accept(sqlgen));
            break;

    /// <param name="e"></param>
    /// <returns></returns>
    private static ISqlFragment HandleCanonicalFunctionDateAdd(SqlGenerator sqlgen, DbFunctionExpression e)
    {
      SqlBuilder result = new SqlBuilder();
      Debug.Assert(e.Arguments.Count == 2, "Canonical datepart functions should have exactly two arguments");

      switch (sqlgen._manifest._dateTimeFormat)
      {
        case SQLiteDateFormats.Ticks:
          result.Append(String.Format("(STRFTIME('%s', JULIANDAY({1}) + ({0} / 86400.0)) * 10000000 + 621355968000000000)", e.Arguments[0].Accept(sqlgen), e.Arguments[1].Accept(sqlgen)));
          break;
        case SQLiteDateFormats.JulianDay:
          result.Append(String.Format("CAST(STRFTIME('%J', JULIANDAY({1}) + ({0} / 86400.0)) AS double)", e.Arguments[0].Accept(sqlgen), e.Arguments[1].Accept(sqlgen)));
          break;
        default:
          result.Append(String.Format("STRFTIME('%Y-%m-%d %H:%M:%S', JULIANDAY({1}) + ({0} / 86400.0))", e.Arguments[0].Accept(sqlgen), e.Arguments[1].Accept(sqlgen)));
          break;
      }

      return result;
    }

    /// <summary>
    /// DateSubtract(datetime1, datetime2) -> DATEDIFF ( seconds , startdate , enddate )
    /// </summary>
    /// <param name="sqlgen"></param>
    /// <param name="e"></param>
    /// <returns></returns>
    private static ISqlFragment HandleCanonicalFunctionDateSubtract(SqlGenerator sqlgen, DbFunctionExpression e)
    {
      SqlBuilder result = new SqlBuilder();
      Debug.Assert(e.Arguments.Count == 2, "Canonical datepart functions should have exactly two arguments");

      switch (sqlgen._manifest._dateTimeFormat)
      {
        case SQLiteDateFormats.Ticks:
          result.Append(String.Format("CAST((({0} - 621355968000000000) / 10000000.0)  - (({1} - 621355968000000000) / 10000000.0) * 86400.0 AS integer)", e.Arguments[0].Accept(sqlgen), e.Arguments[1].Accept(sqlgen)));
          break;
        default:
          result.Append(String.Format("CAST((JULIANDAY({1}) - JULIANDAY({0})) * 86400.0 AS integer)", e.Arguments[0].Accept(sqlgen), e.Arguments[1].Accept(sqlgen)));
          break;
      }

      return result;
    }

    /// <summary>
    /// Handler for canonical functions for extracting date parts.
    /// For example:
    ///     Year(date) -> DATEPART( year, date)
    /// </summary>
    /// <param name="sqlgen"></param>
    /// <param name="e"></param>
    /// <returns></returns>
    private static ISqlFragment HandleCanonicalFunctionDatepart(SqlGenerator sqlgen, DbFunctionExpression e)

      SqlBuilder result = new SqlBuilder();
      result.Append("CAST(STRFTIME('");
      result.Append(trans);
      result.Append("', ");

      Debug.Assert(e.Arguments.Count == 1, "Canonical datepart functions should have exactly one argument");

      switch (sqlgen._manifest._dateTimeFormat)
      {
        case SQLiteDateFormats.Ticks:
          result.Append(String.Format("(({0} - 621355968000000000) / 10000000.0)", e.Arguments[0].Accept(sqlgen)));
          break;
        default:
          result.Append(e.Arguments[0].Accept(sqlgen));
          break;

      {
        symbolTable.Add(inputVarName, fromSymbol);
      }
    }

    /// <summary>
    /// Translates a list of SortClauses.
    /// Used in the translation of OrderBy
    /// </summary>
    /// <param name="orderByClause">The SqlBuilder to which the sort keys should be appended</param>
    /// <param name="sortKeys"></param>
    void AddSortKeys(SqlBuilder orderByClause, IList<DbSortClause> sortKeys)
    {
      string separator = "";
      foreach (DbSortClause sortClause in sortKeys)

      selectStatement.From.AppendLine();
      selectStatement.From.Append(") ");


      return selectStatement;
    }

    /// <summary>
    /// Determines if values of the specified <see cref="SQLiteDateFormats" />
    /// require wrapping in single quotes.
    /// </summary>
    /// <param name="format">
    /// The <see cref="SQLiteDateFormats" /> format.
    /// </param>
    /// <returns>
    /// Non-zero if single quotes are required for a value in the specified
    /// <see cref="SQLiteDateFormats" />.
    /// </returns>
    private static bool NeedSingleQuotes(
        SQLiteDateFormats format
        )
    {
        return format != SQLiteDateFormats.Ticks &&
            format != SQLiteDateFormats.JulianDay &&
            format != SQLiteDateFormats.UnixEpoch;
    }

    /// <summary>
    /// Before we embed a string literal in a SQL string, we should
    /// convert all ' to '', and enclose the whole string in single quotes.
    /// </summary>
    /// <param name="s"></param>
    /// <param name="isUnicode"></param>
    /// <returns>The escaped sql string.</returns>
    private static string EscapeSingleQuote(string s, bool isUnicode)
    {
      return "'" + s.Replace("'", "''") + "'";
    }

    /// <summary>
    /// Returns the sql primitive/native type name.
    /// It will include size, precision or scale depending on type information present in the
    /// type facets
    /// </summary>
    /// <param name="type"></param>
    /// <returns></returns>
    private string GetSqlPrimitiveType(TypeUsage type)
    {
      PrimitiveType primitiveType = MetadataHelpers.GetEdmType<PrimitiveType>(type);

    /// <returns></returns>
    private ISqlFragment HandleCountExpression(DbExpression e)
    {
      ISqlFragment result;

      if (e.ExpressionKind == DbExpressionKind.Constant)
      {
        //For constant expression we should not cast the value,
        // thus we don't go throught the default DbConstantExpression handling
        SqlBuilder sqlBuilder = new SqlBuilder();
        sqlBuilder.Append(((DbConstantExpression)e).Value.ToString());
        result = sqlBuilder;
      }
      else
      {

    /// <returns></returns>
    bool IsCompatible(SqlSelectStatement result, DbExpressionKind expressionKind)
    {
      switch (expressionKind)
      {
        case DbExpressionKind.Distinct:
          return result.Top == null
            // The projection after distinct may not project all
            // columns used in the Order By
              && result.OrderBy.IsEmpty;

        case DbExpressionKind.Filter:
          return result.Select.IsEmpty
                  && result.Where.IsEmpty
                  && result.GroupBy.IsEmpty

    /// For the rest, we need to treat them as there was a dummy
    /// <code>
    /// -- originally {expression}
    /// -- change that to
    /// SELECT *
    /// FROM {expression} as c
    /// </code>
    ///
    /// DbLimitExpression needs to start the statement but not add the default columns
    /// </summary>
    /// <param name="e"></param>
    /// <param name="addDefaultColumns"></param>
    /// <returns></returns>
    SqlSelectStatement VisitExpressionEnsureSqlStatement(DbExpression e, bool addDefaultColumns)
    {

        // Should we actually support this?
        //result.Append(QuoteIdentifier((string)function.MetadataProperties["Schema"].Value ?? "dbo"));
        //result.Append(".");
        result.Append(QuoteIdentifier(storeFunctionName));
      }
    }

    /// <summary>
    /// Appends the literal BLOB string representation of the specified
    /// byte array to the <see cref="SqlBuilder" />.
    /// </summary>
    /// <param name="bytes">
    /// The byte array to be formatted as a literal BLOB string.
    /// </param>
    /// <param name="builder">
    /// The <see cref="SqlBuilder" /> object to use.  If null, an exception
    /// will be thrown.
    /// </param>
    private static void ToBlobLiteral(
        byte[] bytes,
        SqlBuilder builder
        )
    {
        if (builder == null)
            throw new ArgumentNullException("builder");

        if (bytes == null)
        {
            builder.Append("NULL"); /* TODO: Reasonable? */
            return;
        }

        builder.Append(" X'");

        for (int index = 0; index < bytes.Length; index++)
        {
            builder.Append(hexDigits[(bytes[index] & 0xF0) >> 4]);
            builder.Append(hexDigits[bytes[index] & 0x0F]);
        }

        builder.Append("' ");
    }

    /// <summary>
    /// Helper method for the Group By visitor
    /// Returns true if at least one of the aggregates in the given list
    /// has an argument that is not a <see cref="DbPropertyExpression"/>
    /// over <see cref="DbVariableReferenceExpression"/>
    /// </summary>
    /// <param name="aggregates"></param>
    /// <returns></returns>
    static bool NeedsInnerQuery(IList<DbAggregate> aggregates)
    {
      foreach (DbAggregate aggregate in aggregates)
      {
        Debug.Assert(aggregate.Arguments.Count == 1);
        if (!IsPropertyOverVarRef(aggregate.Arguments[0]))
        {
          return true;
        }
      }
      return false;
    }

    /// <summary>
    /// Determines whether the given expression is a <see cref="DbPropertyExpression"/>
    /// over <see cref="DbVariableReferenceExpression"/>
    /// </summary>
    /// <param name="expression"></param>
    /// <returns></returns>
    static bool IsPropertyOverVarRef(DbExpression expression)
    {
      DbPropertyExpression propertyExpression = expression as DbPropertyExpression;
      if (propertyExpression == null)
      {
        return false;
      }
      DbVariableReferenceExpression varRefExpression = propertyExpression.Instance as DbVariableReferenceExpression;
      if (varRefExpression == null)
      {
        return false;
      }
      return true;
    }

    #endregion

    private class KeyFieldExpressionComparer : IEqualityComparer<DbExpression>
    {
      // Fields
      internal static readonly SqlGenerator.KeyFieldExpressionComparer Singleton = new SqlGenerator.KeyFieldExpressionComparer();

      // Methods
      private KeyFieldExpressionComparer()

#if USE_ENTITY_FRAMEWORK_6
namespace System.Data.SQLite.EF6
#else
namespace System.Data.SQLite.Linq
#endif
{
  using System;
  using System.Collections.Generic;
  using System.IO;
  using System.Reflection;

#if !PLATFORM_COMPACTFRAMEWORK
  using System.Text;
#endif

  using System.Xml;

#if USE_ENTITY_FRAMEWORK_6
  using System.Data.Entity.Core;
  using System.Data.Entity.Core.Common;
  using System.Data.Entity.Core.Metadata.Edm;
#else
  using System.Data.Common;
  using System.Data.Metadata.Edm;
#endif

  /// <summary>
  /// The Provider Manifest for SQL Server
  /// </summary>
  internal sealed class SQLiteProviderManifest : DbXmlEnabledProviderManifest
  {
    internal SQLiteDateFormats _dateTimeFormat;
    internal DateTimeKind _dateTimeKind;
    internal string _dateTimeFormatString;
    internal bool _binaryGuid;

    /// <summary>
    /// Constructs the provider manifest.
    /// </summary>
    /// <remarks>
    /// Previously, the manifest token was interpreted as a <see cref="SQLiteDateFormats" />,
    /// because the <see cref="DateTime" /> functions are vastly different depending on the
    /// connection was opened.  However, the manifest token may specify a connection string
    /// instead.  WARNING: Only the "DateTimeFormat", "DateTimeKind", "DateTimeFormatString",
    /// and "BinaryGUID" connection parameters are extracted from it.  All other connection
    /// parameters, if any are present, are silently ignored.
    /// </remarks>
    /// <param name="manifestToken">
    /// A token used to infer the capabilities of the store.
    /// </param>
    public SQLiteProviderManifest(string manifestToken)
      : base(GetProviderManifest())
    {
        SetFromOptions(ParseProviderManifestToken(GetProviderManifestToken(manifestToken)));
    }

    private static XmlReader GetProviderManifest()
    {
      return GetXmlResource("System.Data.SQLite.SQLiteProviderServices.ProviderManifest.xml");
    }

    /// <summary>
    /// Determines and returns the effective provider manifest token to use,
    /// based on the specified provider manifest token and the environment,
    /// if applicable.
    /// </summary>
    /// <param name="manifestToken">
    /// The original provider manifest token passed to the constructor for this
    /// class.
    /// </param>
    /// <returns>
    /// The effective provider manifest token.
    /// </returns>
    private static string GetProviderManifestToken(
        string manifestToken
        )
    {
#if !PLATFORM_COMPACTFRAMEWORK
        string value = UnsafeNativeMethods.GetSettingValue(
            "AppendManifestToken_SQLiteProviderManifest", null);

        if (String.IsNullOrEmpty(value))
            return manifestToken;

        int capacity = value.Length;

        if (manifestToken != null)
            capacity += manifestToken.Length;

        StringBuilder builder = new StringBuilder(capacity);

        builder.Append(manifestToken);
        builder.Append(value);

        return builder.ToString();
#else
        //
        // NOTE: The .NET Compact Framework lacks environment variable support.
        //       Therefore, just return the original provider manifest token
        //       verbatim in this case.
        //
        return manifestToken;
#endif
    }

    /// <summary>
    /// Attempts to parse a provider manifest token.  It must contain either a
    /// legacy string that specifies the <see cref="SQLiteDateFormats" /> value
    /// -OR- string that uses the standard connection string syntax; otherwise,
    /// the results are undefined.
    /// </summary>
    /// <param name="manifestToken">
    /// The manifest token to parse.
    /// </param>
    /// <returns>
    /// The dictionary containing the connection string parameters.
    /// </returns>
    private static SortedList<string, string> ParseProviderManifestToken(
        string manifestToken
        )
    {
        return SQLiteConnection.ParseConnectionString(manifestToken, false, true);
    }

    /// <summary>
    /// Attempts to set the provider manifest options from the specified
    /// connection string parameters.  An exception may be thrown if one
    /// or more of the connection string parameter values do not conform
    /// to the expected type.
    /// </summary>
    /// <param name="opts">
    /// The dictionary containing the connection string parameters.
    /// </param>
    internal void SetFromOptions(
        SortedList<string, string> opts
        )
    {
        _dateTimeFormat = SQLiteConnection.DefaultDateTimeFormat;
        _dateTimeKind = SQLiteConnection.DefaultDateTimeKind;
        _dateTimeFormatString = SQLiteConnection.DefaultDateTimeFormatString;
        _binaryGuid = /* SQLiteConnection.DefaultBinaryGUID; */ false; /* COMPAT: Legacy. */

        if (opts == null)
            return;

#if !PLATFORM_COMPACTFRAMEWORK
        string[] names = Enum.GetNames(typeof(SQLiteDateFormats));
#else
        string[] names = {
            SQLiteDateFormats.Ticks.ToString(),
            SQLiteDateFormats.ISO8601.ToString(),
            SQLiteDateFormats.JulianDay.ToString(),
            SQLiteDateFormats.UnixEpoch.ToString(),
            SQLiteDateFormats.InvariantCulture.ToString(),
            SQLiteDateFormats.CurrentCulture.ToString(),
            "Default"
        };
#endif

        foreach (string name in names)
        {
            if (String.IsNullOrEmpty(name))
                continue;

            object value = SQLiteConnection.FindKey(opts, name, null);

            if (value == null)
                continue;

            _dateTimeFormat = (SQLiteDateFormats)Enum.Parse(
                typeof(SQLiteDateFormats), name, true);
        }

        object enumValue;

        enumValue = SQLiteConnection.TryParseEnum(
            typeof(SQLiteDateFormats), SQLiteConnection.FindKey(
            opts, "DateTimeFormat", null), true);

        if (enumValue is SQLiteDateFormats)
            _dateTimeFormat = (SQLiteDateFormats)enumValue;

        enumValue = SQLiteConnection.TryParseEnum(
            typeof(DateTimeKind), SQLiteConnection.FindKey(
            opts, "DateTimeKind", null), true);

        if (enumValue is DateTimeKind)
            _dateTimeKind = (DateTimeKind)enumValue;

        string stringValue = SQLiteConnection.FindKey(
            opts, "DateTimeFormatString", null);

        if (stringValue != null)
            _dateTimeFormatString = stringValue;

        stringValue = SQLiteConnection.FindKey(
            opts, "BinaryGUID", null);

        if (stringValue != null)
            _binaryGuid = SQLiteConvert.ToBoolean(stringValue);
    }

    /// <summary>
    /// Returns manifest information for the provider
    /// </summary>
    /// <param name="informationType">The name of the information to be retrieved.</param>
    /// <returns>An XmlReader at the begining of the information requested.</returns>
    protected override XmlReader GetDbInformation(string informationType)

#if USE_ENTITY_FRAMEWORK_6
namespace System.Data.SQLite.EF6
#else
namespace System.Data.SQLite.Linq
#endif
{
  using System;
  using System.Collections.Generic;
  using System.Data.Common;
  using System.Diagnostics;
  using System.Globalization;
  using System.Text;

#if USE_ENTITY_FRAMEWORK_6
  using System.Data.Entity.Core.Common;
  using System.Data.Entity.Core.Metadata.Edm;
  using System.Data.Entity.Core.Common.CommandTrees;
#else
  using System.Data.Metadata.Edm;

        command.Dispose();
        throw;
      }
    }

    protected override string GetDbProviderManifestToken(DbConnection connection)
    {
        if (connection == null)
            throw new ArgumentNullException("connection");


        if (String.IsNullOrEmpty(connection.ConnectionString))
            throw new ArgumentNullException("ConnectionString");




        return connection.ConnectionString;


    }

    protected override DbProviderManifest GetDbProviderManifest(string versionHint)
    {
      return new SQLiteProviderManifest(versionHint);
    }

<?xml version="1.0"?>
<!--
 *
 * System.Data.SQLite.dll.config -
 *
 * Written by Joe Mistachkin.
 * Released to the public domain, use at your own risk!
 *
-->
<configuration>
  <appSettings>
    <!--
        NOTE: If this environment variable is set [to anything], it will be
              used by the System.Data.SQLite.Linq.SQLiteProviderManifest class
              (and the System.Data.SQLite.EF6.SQLiteProviderManifest class) to
              modify future provider manifest tokens by appending the value of
              the environment variable to the existing provider manifest token,
              if any.  Typically, in order for the constructed provider
              manifest token to be syntactically correct, the environment
              variable value [to be appended] must begin with a semicolon.
    -->
    <!--
    <add key="AppendManifestToken_SQLiteProviderManifest" value="" />
    -->

    <!--
        NOTE: If this configuration variable is set [to anything], the SQLite
              logging subsystem may be initialized in a non-default application
              domain.  By default, this is not allowed due to the potential
              for application domain unloading issues.
    -->
    <!--

              architecture of the current process (e.g. a 32-bit x86
              application running on a 64-bit x64 operating system should have
              the value "x86").
    -->
    <!--
    <add key="PROCESSOR_ARCHITECTURE" value="%PROCESSOR_ARCHITECTURE%" />
    -->

    <!--
        NOTE: If this environment variable is set [to anything], all calls to
              prepare a SQL query will be logged, regardless of the flags for
              the associated connection.
    -->
    <!--
    <add key="SQLite_ForceLogPrepare" value="1" />
    -->

    <!--
        NOTE: If this environment variable is set [to anything], it will be
              used by the System.Data.SQLite.SQLiteFactory class as the type
              name containing the System.Data.Common.DbProviderServices
              implementation that should be used.
    -->

    internal override string GetLastError(string defValue)
    {
        string result = SQLiteBase.GetLastError(_sql, _sql);
        if (String.IsNullOrEmpty(result)) result = defValue;
        return result;
    }

    ///////////////////////////////////////////////////////////////////////////////////////////////

    #region Query Diagnostics Support
#if !PLATFORM_COMPACTFRAMEWORK
    /// <summary>
    /// This field is used to keep track of whether or not the
    /// "SQLite_ForceLogPrepare" environment variable has been queried.  If so,
    /// it will only be non-zero if the environment variable was present.
    /// </summary>
    private static bool? forceLogPrepare = null;

    ///////////////////////////////////////////////////////////////////////////////////////////////

    /// <summary>
    /// Determines if all calls to prepare a SQL query will be logged,
    /// regardless of the flags for the associated connection.
    /// </summary>
    /// <returns>
    /// Non-zero to log all calls to prepare a SQL query.
    /// </returns>
    private static bool ForceLogPrepare()
    {
        lock (syncRoot)
        {
            if (forceLogPrepare == null)
            {
                if (UnsafeNativeMethods.GetSettingValue(
                        "SQLite_ForceLogPrepare", null) != null)
                {
                    forceLogPrepare = true;
                }
                else
                {
                    forceLogPrepare = false;
                }
            }

            return (bool)forceLogPrepare;
        }
    }
#endif
    #endregion

    ///////////////////////////////////////////////////////////////////////////////////////////////

    internal override SQLiteStatement Prepare(SQLiteConnection cnn, string strSql, SQLiteStatement previous, uint timeoutMS, ref string strRemain)
    {
      if (!String.IsNullOrEmpty(strSql))
      {
        //
        // NOTE: SQLite does not support the concept of separate schemas

              "{0}.", baseSchemaName), String.Empty);
        }
      }

      SQLiteConnectionFlags flags =
          (cnn != null) ? cnn.Flags : SQLiteConnectionFlags.Default;

      if (
#if !PLATFORM_COMPACTFRAMEWORK
          ForceLogPrepare() ||
#endif
          ((flags & SQLiteConnectionFlags.LogPrepare) == SQLiteConnectionFlags.LogPrepare))
      {
          if ((strSql == null) || (strSql.Length == 0) || (strSql.Trim().Length == 0))
              SQLiteLog.LogMessage("Preparing {<nothing>}...");
          else
              SQLiteLog.LogMessage(String.Format(
                  CultureInfo.CurrentCulture, "Preparing {{{0}}}...", strSql));
      }

    internal const IsolationLevel DeferredIsolationLevel = IsolationLevel.ReadCommitted;
    internal const IsolationLevel ImmediateIsolationLevel = IsolationLevel.Serializable;

    private const SQLiteConnectionFlags DefaultFlags = SQLiteConnectionFlags.Default;
    private const SQLiteSynchronousEnum DefaultSynchronous = SQLiteSynchronousEnum.Default;
    private const SQLiteJournalModeEnum DefaultJournalMode = SQLiteJournalModeEnum.Default;
    private const IsolationLevel DefaultIsolationLevel = IsolationLevel.Serializable;
    internal const SQLiteDateFormats DefaultDateTimeFormat = SQLiteDateFormats.Default;
    internal const DateTimeKind DefaultDateTimeKind = DateTimeKind.Unspecified;
    internal const string DefaultDateTimeFormatString = null;
    private const string DefaultDataSource = null;
    private const string DefaultUri = null;
    private const string DefaultFullUri = null;
    private const string DefaultHexPassword = null;
    private const string DefaultPassword = null;
    private const int DefaultVersion = 3;
    private const int DefaultPageSize = 1024;
    private const int DefaultMaxPageCount = 0;
    private const int DefaultCacheSize = 2000;
    private const int DefaultMaxPoolSize = 100;
    private const int DefaultConnectionTimeout = 30;
    private const bool DefaultNoSharedFlags = false;
    private const bool DefaultFailIfMissing = false;
    private const bool DefaultReadOnly = false;
    internal const bool DefaultBinaryGUID = true;
    private const bool DefaultUseUTF16Encoding = false;
    private const bool DefaultToFullPath = true;
    private const bool DefaultPooling = false; // TODO: Maybe promote this to static property?
    private const bool DefaultLegacyFormat = false;
    private const bool DefaultForeignKeys = false;
    private const bool DefaultEnlist = true;
    private const bool DefaultSetDefaults = true;

        if (handle.IsClosed)
            throw new InvalidOperationException("The connection handle is closed.");
    }

    ///////////////////////////////////////////////////////////////////////////////////////////////

    /// <summary>
    /// Parses a connection string into component parts using the custom
    /// connection string parser.  An exception may be thrown if the syntax
    /// of the connection string is incorrect.
    /// </summary>
    /// <param name="connectionString">
    /// The connection string to parse.
    /// </param>
    /// <param name="parseViaFramework">
    /// Non-zero to parse the connection string using the algorithm provided
    /// by the framework itself.  This is not applicable when running on the
    /// .NET Compact Framework.
    /// </param>
    /// <param name="allowNameOnly">
    /// Non-zero if names are allowed without values.
    /// </param>
    /// <returns>
    /// The list of key/value pairs corresponding to the parameters specified
    /// within the connection string.
    /// </returns>
    internal static SortedList<string, string> ParseConnectionString(
        string connectionString,
        bool parseViaFramework,
        bool allowNameOnly
        )
    {
        return parseViaFramework ?
            ParseConnectionStringViaFramework(connectionString, false) :
            ParseConnectionString(connectionString, allowNameOnly);
    }

    ///////////////////////////////////////////////////////////////////////////////////////////////

    private void SetupSQLiteBase(SortedList<string, string> opts)
    {
        object enumValue;

      else if (path.StartsWith ("/", StringComparison.OrdinalIgnoreCase))
            return path;
      else
            throw new InvalidOperationException ("Invalid connection string: invalid URI");
    }

    /// <summary>
    /// Parses a connection string into component parts using the custom
    /// connection string parser.  An exception may be thrown if the syntax
    /// of the connection string is incorrect.
    /// </summary>
    /// <param name="connectionString">
    /// The connection string to parse.
    /// </param>
    /// <param name="allowNameOnly">
    /// Non-zero if names are allowed without values.
    /// </param>
    /// <returns>
    /// The list of key/value pairs corresponding to the parameters specified
    /// within the connection string.
    /// </returns>
    private static SortedList<string, string> ParseConnectionString(
        string connectionString,
        bool allowNameOnly
        )
    {
      string s = connectionString;
      int n;
      SortedList<string, string> ls = new SortedList<string, string>(StringComparer.OrdinalIgnoreCase);

      // First split into semi-colon delimited values.
      string error = null;

        if (arParts[n].Length == 0)
          continue;

        int indexOf = arParts[n].IndexOf('=');

        if (indexOf != -1)
          ls.Add(UnwrapString(arParts[n].Substring(0, indexOf).Trim()), UnwrapString(arParts[n].Substring(indexOf + 1).Trim()));
        else if (allowNameOnly)
          ls.Add(UnwrapString(arParts[n].Trim()), String.Empty);
        else
          throw new ArgumentException(String.Format(CultureInfo.CurrentCulture, "Invalid ConnectionString format for part \"{0}\", no equal sign found", arParts[n]));
      }
      return ls;
    }

    /// <summary>
    /// Parses a connection string using the built-in (i.e. framework provided)
    /// connection string parser class and returns the key/value pairs.  An
    /// exception may be thrown if the connection string is invalid or cannot be
    /// parsed.  When compiled for the .NET Compact Framework, the custom
    /// connection string parser is always used instead because the framework
    /// provided one is unavailable there.
    /// </summary>
    /// <param name="connectionString">
    /// The connection string to parse.
    /// </param>
    /// <param name="strict">
    /// Non-zero to throw an exception if any connection string values are not of
    /// the <see cref="String" /> type.  This is not applicable when running on
    /// the .NET Compact Framework.
    /// </param>
    /// <returns>The list of key/value pairs.</returns>
    private static SortedList<string, string> ParseConnectionStringViaFramework(
        string connectionString,
        bool strict
        )
    {
#if !PLATFORM_COMPACTFRAMEWORK
        DbConnectionStringBuilder connectionStringBuilder
            = new DbConnectionStringBuilder();

        return result;
#else
        //
        // NOTE: On the .NET Compact Framework, always use our custom connection
        //       string parser as the built-in (i.e. framework provided) one is
        //       unavailable.
        //
        return ParseConnectionString(connectionString, false);
#endif
    }

#if !PLATFORM_COMPACTFRAMEWORK
    /// <summary>
    /// Manual distributed transaction enlistment support
    /// </summary>

      if (_connectionState != ConnectionState.Closed)
        throw new InvalidOperationException();

      Close();

      SortedList<string, string> opts = ParseConnectionString(
          _connectionString, _parseViaFramework, false);

      OnChanged(this, new ConnectionEventArgs(
          SQLiteConnectionEventType.ConnectionString, null, null, null, null,
          null, _connectionString, new object[] { opts }));

      object enumValue;

      "OneTwo=ThreeFour" "\"OneTwo\"=\"ThreeFour\"" \
      "One Two=Three Four" "\"One Two\"=\"Three Four\"" \
      "OneTwo=ThreeFour;" "\"OneTwo\"=\"ThreeFour\";" \
      "One Two=Three Four;" "\"One Two\"=\"Three Four\";"]

  foreach string $strings {
    set list [object invoke -flags +NonPublic \
        System.Data.SQLite.SQLiteConnection ParseConnectionString \
        $string false]

    object foreach -alias pair $list {
      lappend result [list [$pair Key] [$pair Value]]
    }
  }

  set result

###############################################################################
#
# tkt-8d928c3e88.eagle --
#
# Written by Joe Mistachkin.
# Released to the public domain, use at your own risk!
#
###############################################################################

package require Eagle
package require Eagle.Library
package require Eagle.Test

runTestPrologue

###############################################################################

package require System.Data.SQLite.Test
runSQLiteTestPrologue
runSQLiteTestFilesPrologue

###############################################################################

runTest {test tkt-8d928c3e88-1.1 {LINQ w/BinaryGUID=false} -body {
  #
  # NOTE: Re-copy the reference database file used for this unit test to the
  #       build directory in case it has been changed by a previous test run.
  #
  file copy -force $northwindEfDbFile \
      [file join [getBuildDirectory] [file tail $northwindEfDbFile]]

  set result [list]
  set output ""

  set code [catch {
    testClrExec $testLinqExeFile [list -eventflags Wait -directory \
        [file dirname $testLinqExeFile] -nocarriagereturns -stdout output \
        -success 0] -binaryguid false
  } error]

  tlog "---- BEGIN STDOUT OUTPUT\n"
  tlog $output
  tlog "\n---- END STDOUT OUTPUT\n"

  lappend result $code

  if {$code == 0} then {
    lappend result [string trim $output]
  } else {
    lappend result [string trim $error]
  }

  set result
} -cleanup {
  unset -nocomplain code output error result
} -constraints {eagle monoToDo SQLite file_System.Data.SQLite.dll testExec\
file_System.Data.SQLite.Linq.dll file_testlinq.exe file_northwindEF.db} \
-result {0 2d3d2d3d-2d3d-2d3d-2d3d-2d3d2d3d2d3d}}

###############################################################################

runTest {test tkt-8d928c3e88-1.2 {LINQ w/BinaryGUID=true} -body {
  #
  # NOTE: Re-copy the reference database file used for this unit test to the
  #       build directory in case it has been changed by a previous test run.
  #
  file copy -force $northwindEfDbFile \
      [file join [getBuildDirectory] [file tail $northwindEfDbFile]]

  set result [list]
  set output ""

  set code [catch {
    testClrExec $testLinqExeFile [list -eventflags Wait -directory \
        [file dirname $testLinqExeFile] -nocarriagereturns -stdout output \
        -success 0] -binaryguid true
  } error]

  tlog "---- BEGIN STDOUT OUTPUT\n"
  tlog $output
  tlog "\n---- END STDOUT OUTPUT\n"

  lappend result $code

  if {$code == 0} then {
    lappend result [string trim $output]
  } else {
    lappend result [string trim $error]
  }

  set result
} -cleanup {
  unset -nocomplain code output error result
} -constraints {eagle monoToDo SQLite file_System.Data.SQLite.dll testExec\
file_System.Data.SQLite.Linq.dll file_testlinq.exe file_northwindEF.db} \
-result {0 =-=-=-=--=-=-=-=}}

###############################################################################

runTest {test tkt-8d928c3e88-2.1 {LINQ w/DateTimeFormat=Ticks} -body {
  #
  # NOTE: Re-copy the reference database file used for this unit test to the
  #       build directory in case it has been changed by a previous test run.
  #
  file copy -force $northwindEfDbFile \
      [file join [getBuildDirectory] [file tail $northwindEfDbFile]]

  set result [list]
  set output ""

  set code [catch {
    testClrExec $testLinqExeFile [list -eventflags Wait -directory \
        [file dirname $testLinqExeFile] -nocarriagereturns -stdout output \
        -success 0] -datetime2 Ticks
  } error]

  tlog "---- BEGIN STDOUT OUTPUT\n"
  tlog $output
  tlog "\n---- END STDOUT OUTPUT\n"

  lappend result $code

  if {$code == 0} then {
    lappend result [string trim $output]
  } else {
    lappend result [string trim $error]
  }

  set result
} -cleanup {
  unset -nocomplain code output error result
} -constraints {eagle monoToDo SQLite file_System.Data.SQLite.dll testExec\
file_System.Data.SQLite.Linq.dll file_testlinq.exe file_northwindEF.db} \
-match regexp -result \
{\sWHERE \[Extent1\]\.\[OrderDate\] < 629876736000000000\s}}

###############################################################################

runTest {test tkt-8d928c3e88-2.2 {LINQ w/DateTimeFormat=JulianDay} -body {
  #
  # NOTE: Re-copy the reference database file used for this unit test to the
  #       build directory in case it has been changed by a previous test run.
  #
  file copy -force $northwindEfDbFile \
      [file join [getBuildDirectory] [file tail $northwindEfDbFile]]

  set result [list]
  set output ""

  set code [catch {
    testClrExec $testLinqExeFile [list -eventflags Wait -directory \
        [file dirname $testLinqExeFile] -nocarriagereturns -stdout output \
        -success 0] -datetime2 JulianDay
  } error]

  tlog "---- BEGIN STDOUT OUTPUT\n"
  tlog $output
  tlog "\n---- END STDOUT OUTPUT\n"

  lappend result $code

  if {$code == 0} then {
    lappend result [string trim $output]
  } else {
    lappend result [string trim $error]
  }

  set result
} -cleanup {
  unset -nocomplain code output error result
} -constraints {eagle monoToDo SQLite file_System.Data.SQLite.dll testExec\
file_System.Data.SQLite.Linq.dll file_testlinq.exe file_northwindEF.db} \
-match regexp -result {\sWHERE \[Extent1\]\.\[OrderDate\] < 2450449\.5\s}}

###############################################################################

runTest {test tkt-8d928c3e88-2.3 {LINQ w/DateTimeFormat=UnixEpoch} -body {
  #
  # NOTE: Re-copy the reference database file used for this unit test to the
  #       build directory in case it has been changed by a previous test run.
  #
  file copy -force $northwindEfDbFile \
      [file join [getBuildDirectory] [file tail $northwindEfDbFile]]

  set result [list]
  set output ""

  set code [catch {
    testClrExec $testLinqExeFile [list -eventflags Wait -directory \
        [file dirname $testLinqExeFile] -nocarriagereturns -stdout output \
        -success 0] -datetime2 UnixEpoch
  } error]

  tlog "---- BEGIN STDOUT OUTPUT\n"
  tlog $output
  tlog "\n---- END STDOUT OUTPUT\n"

  lappend result $code

  if {$code == 0} then {
    lappend result [string trim $output]
  } else {
    lappend result [string trim $error]
  }

  set result
} -cleanup {
  unset -nocomplain code output error result
} -constraints {eagle monoToDo SQLite file_System.Data.SQLite.dll testExec\
file_System.Data.SQLite.Linq.dll file_testlinq.exe file_northwindEF.db} \
-match regexp -result {\sWHERE \[Extent1\]\.\[OrderDate\] < 852076800\s}}

###############################################################################

runTest {test tkt-8d928c3e88-2.4 {LINQ w/DateTimeFormat=ISO8601} -body {
  #
  # NOTE: Re-copy the reference database file used for this unit test to the
  #       build directory in case it has been changed by a previous test run.
  #
  file copy -force $northwindEfDbFile \
      [file join [getBuildDirectory] [file tail $northwindEfDbFile]]

  set result [list]
  set output ""

  set code [catch {
    testClrExec $testLinqExeFile [list -eventflags Wait -directory \
        [file dirname $testLinqExeFile] -nocarriagereturns -stdout output \
        -success 0] -datetime2 ISO8601
  } error]

  tlog "---- BEGIN STDOUT OUTPUT\n"
  tlog $output
  tlog "\n---- END STDOUT OUTPUT\n"

  lappend result $code

  if {$code == 0} then {
    lappend result [string trim $output]
  } else {
    lappend result [string trim $error]
  }

  set result
} -cleanup {
  unset -nocomplain code output error result
} -constraints {eagle monoToDo SQLite file_System.Data.SQLite.dll testExec\
file_System.Data.SQLite.Linq.dll file_testlinq.exe file_northwindEF.db} \
-match regexp -result \
{\sWHERE \[Extent1\]\.\[OrderDate\] < '1997-01-01 00:00:00'\s}}

###############################################################################

runSQLiteTestFilesEpilogue
runSQLiteTestEpilogue
runTestEpilogue

runTest {test tkt-e47b3d8346-1.1 {parse semi-colon in data source} -setup {
  unset -nocomplain result list pair
} -body {
  set result [list]

  set list [object invoke -flags +NonPublic \
      System.Data.SQLite.SQLiteConnection ParseConnectionString \
      {Data Source="C:\full\path\to\file.db;more.data.here";} false]

  object foreach -alias pair $list {
    lappend result [list [$pair Key] [$pair Value]]
  }

  set result
} -cleanup {

    <li>Defer disposing of connections created by the static SQLiteCommand.Execute method when a data reader is returned. Fix for [daeaf3150a].</li>
    <li>Wrap SELECT statements in parenthesis if they have an ORDER BY, LIMIT, or OFFSET clause and a compound operator is involved. Fix for [0a32885109].</li>
    <li>In the SQLiteDataReader.VerifyType method, remove duplicate &quot;if&quot; statement for the DbType.SByte value and move the remaining &quot;if&quot; to the Int64 affinity. Fix for [c5cc2fb334].&nbsp;<b>** Potentially Incompatible Change **</b></li>
    <li>Handle Julian Day values that fall outside of the supported range for OLE Automation dates. Fix for [3e783eecbe].&nbsp;<b>** Potentially Incompatible Change **</b></li>
    <li>Make sure the interop files are copied when publishing a project that refers to a NuGet package containing them. Fix for [e796ac82c1].&nbsp;<b>** Potentially Incompatible Change **</b></li>
    <li>Make sure the interop files are copied before the PostBuildEvent. Fix for [f16c93a932].&nbsp;<b>** Potentially Incompatible Change **</b></li>
    <li>Modify GetSchemaTable method to avoid setting SchemaTableColumn.IsKey column to true when more than one table is referenced. Fix for [47c6fa04d3].&nbsp;<b>** Potentially Incompatible Change **</b></li>
    <li>Add AppendManifestToken_SQLiteProviderManifest environment variable to enable better integration between LINQ and the underlying store connection.</li>
    <li>Add SQLite_ForceLogPrepare environment variable to force logging of all prepared SQL regardless of the flags for the associated connection.</li>
    <li>Honor the DateTimeFormat, DateTimeKind, DateTimeFormatString, BinaryGUID connection string and/or provider manifest token properties from within the LINQ assembly. Fix for [8d928c3e88].&nbsp;<b>** Potentially Incompatible Change **</b></li>
</ul>
<p>
    <b>1.0.94.0 - September 9, 2014</b>
</p>
<ul>
    <li>Updated to <a href="http://www.sqlite.org/releaselog/3_8_6.html">SQLite 3.8.6</a>.</li>
    <li>Updated to <a href="http://www.nuget.org/packages/EntityFramework/6.1.1">Entity Framework 6.1.1</a>.</li>

/********************************************************
 * ADO.NET 2.0 Data Provider for SQLite Version 3.X
 * Written by Robert Simpson (robert@blackcastlesoft.com)
 *
 * Released to the public domain, use at your own risk!
 ********************************************************/

using System;
using System.Data.Common;
using System.Diagnostics;
using System.Linq;
using System.Reflection;
using System.Text;
using System.Transactions;

#if USE_ENTITY_FRAMEWORK_6
using System.Data.Entity.Core.EntityClient;
using System.Data.Entity.Core.Objects;
#else
using System.Data.EntityClient;
using System.Data.Objects;
#endif

namespace testlinq
{
  class Program
  {

              case "old":
                  {
                      return OldTests();
                  }
              case "datetime":
                  {
                      return DateTimeTest();
                  }
              case "datetime2":
                  {
                      string dateTimeFormat = null;

                      if (args.Length > 1)
                          dateTimeFormat = args[1];

                      DateTimeTest2(dateTimeFormat);
                      return 0;
                  }
              case "skip":
                  {
                      int pageSize = 0;

                      if (args.Length > 1)
                      {

                      return EFTransactionTest(value);
                  }
              case "update":
                  {
                      return UpdateTest();
                  }
              case "binaryguid":
                  {
                      bool value = false;

                      if (args.Length > 1)
                      {
                          if (!bool.TryParse(args[1], out value))
                          {
                              Console.WriteLine(
                                  "cannot parse \"{0}\" as boolean",
                                  args[1]);

                              return 1;
                          }
                      }

                      return BinaryGuidTest(value);
                  }
              default:
                  {
                      Console.WriteLine("unknown test \"{0}\"", arg);
                      return 1;
                  }
          }
      }

      /// <summary>
      /// Attempts to obtain the underlying store connection
      /// (a <see cref="DbConnection" />) from the specified
      /// <see cref="EntityConnection" />.
      /// </summary>
      /// <param name="entityConnection">
      /// The <see cref="EntityConnection" /> to use.
      /// </param>
      /// <returns>
      /// The <see cref="DbConnection" /> -OR- null if it
      /// cannot be determined.
      /// </returns>
      private static DbConnection GetStoreConnection(
          EntityConnection entityConnection
          )
      {
          //
          // NOTE: No entity connection, no store connection.
          //
          if (entityConnection == null)
              return null;

          //
          // HACK: We need the underlying store connection and
          //       the legacy versions of the .NET Framework do
          //       not expose it; therefore, attempt to grab it
          //       by force.
          //
          FieldInfo fieldInfo = typeof(EntityConnection).GetField(
              "_storeConnection", BindingFlags.Instance |
              BindingFlags.NonPublic);

          //
          // NOTE: If the field is not found, just return null.
          //
          if (fieldInfo == null)
              return null;

          return fieldInfo.GetValue(entityConnection) as DbConnection;
      }

      //
      // NOTE: Used to test the fix for ticket [8b7d179c3c].
      //
      private static int SkipTest(int pageSize)
      {
          using (northwindEFEntities db = new northwindEFEntities())

              Console.WriteLine(
                  "inserted {0} updated {1}", counts[0], counts[1]);
          }

          return 0;
      }

      //
      // NOTE: Used to test the BinaryGUID fix (i.e. BLOB literal formatting
      //       of GUID values when the BinaryGUID connection property has been
      //       enabled).
      //
      private static int BinaryGuidTest(bool binaryGuid)
      {
          Environment.SetEnvironmentVariable(
              "AppendManifestToken_SQLiteProviderManifest",
              String.Format(";BinaryGUID={0};", binaryGuid));

          using (northwindEFEntities db = new northwindEFEntities())
          {
              string sql = "SELECT VALUE GUID " +
                  "'2d3d2d3d-2d3d-2d3d-2d3d-2d3d2d3d2d3d' " +
                  "FROM Orders AS o WHERE o.OrderID = 10248;";

              ObjectQuery<string> query = db.CreateQuery<string>(sql);

              foreach (string s in query)
                  Console.WriteLine(s);
          }

          Environment.SetEnvironmentVariable(
              "AppendManifestToken_SQLiteProviderManifest",
              null);

          return 0;
      }

      private static int DateTimeTest()
      {
          using (northwindEFEntities db = new northwindEFEntities())
          {
              DateTime dateTime = new DateTime(1997, 1, 1, 0, 0, 0, DateTimeKind.Local);
              int c1 = db.Orders.Where(i => i.OrderDate == new DateTime(1997, 1, 1, 0, 0, 0, DateTimeKind.Local)).Count();
              int c2 = db.Orders.Where(i => i.OrderDate == dateTime).Count();
              return c1 == c2 ? 0 : 1;
          }
      }

      private static void DateTimeTest2(
          string dateTimeFormat
          )
      {
          TraceListener listener = new ConsoleTraceListener();

          Trace.Listeners.Add(listener);
          Environment.SetEnvironmentVariable("SQLite_ForceLogPrepare", "1");

          if (dateTimeFormat != null)
          {
              Environment.SetEnvironmentVariable(
                  "AppendManifestToken_SQLiteProviderManifest",
                  String.Format(";DateTimeFormat={0};", dateTimeFormat));
          }

          using (northwindEFEntities db = new northwindEFEntities())
          {
              db.Orders.Where(i => i.OrderDate <
                  new DateTime(1997, 1, 1, 0, 0, 0, DateTimeKind.Local)).Count();
          }

          if (dateTimeFormat != null)
          {
              Environment.SetEnvironmentVariable(
                  "AppendManifestToken_SQLiteProviderManifest",
                  null);
          }

          Environment.SetEnvironmentVariable("SQLite_ForceLogPrepare", null);
          Trace.Listeners.Remove(listener);
      }

    private static int OldTests()
    {
      using (northwindEFEntities db = new northwindEFEntities())
      {
        {
          string entitySQL = "SELECT VALUE o FROM Orders AS o WHERE SQLite.DatePart('yyyy', o.OrderDate) = 1997 ORDER BY o.OrderID;";

    <li>Defer disposing of connections created by the static SQLiteCommand.Execute method when a data reader is returned. Fix for [daeaf3150a].</li>
    <li>Wrap SELECT statements in parenthesis if they have an ORDER BY, LIMIT, or OFFSET clause and a compound operator is involved. Fix for [0a32885109].</li>
    <li>In the SQLiteDataReader.VerifyType method, remove duplicate &quot;if&quot; statement for the DbType.SByte value and move the remaining &quot;if&quot; to the Int64 affinity.  Fix for [c5cc2fb334].&nbsp;<b>** Potentially Incompatible Change **</b></li>
    <li>Handle Julian Day values that fall outside of the supported range for OLE Automation dates. Fix for [3e783eecbe].&nbsp;<b>** Potentially Incompatible Change **</b></li>
    <li>Make sure the interop files are copied when publishing a project that refers to a NuGet package containing them. Fix for [e796ac82c1].&nbsp;<b>** Potentially Incompatible Change **</b></li>
    <li>Make sure the interop files are copied before the PostBuildEvent. Fix for [f16c93a932].&nbsp;<b>** Potentially Incompatible Change **</b></li>
    <li>Modify GetSchemaTable method to avoid setting SchemaTableColumn.IsKey column to true when more than one table is referenced. Fix for [47c6fa04d3].&nbsp;<b>** Potentially Incompatible Change **</b></li>
    <li>Add AppendManifestToken_SQLiteProviderManifest environment variable to enable better integration between LINQ and the underlying store connection.</li>
    <li>Add SQLite_ForceLogPrepare environment variable to force logging of all prepared SQL regardless of the flags for the associated connection.</li>
    <li>Honor the DateTimeFormat, DateTimeKind, DateTimeFormatString, BinaryGUID connection string and/or provider manifest token properties from within the LINQ assembly. Fix for [8d928c3e88].&nbsp;<b>** Potentially Incompatible Change **</b></li>
</ul>
<p>
    <b>1.0.94.0 - September 9, 2014</b>
</p>
<ul>
    <li>Updated to [http://www.sqlite.org/releaselog/3_8_6.html|SQLite 3.8.6].</li>
    <li>Updated to [http://www.nuget.org/packages/EntityFramework/6.1.1|Entity Framework 6.1.1].</li>