System.Data.SQLite
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Overview
Comment:pre 1.0.59.0
Downloads: Tarball | ZIP archive | SQL archive
Timelines: family | ancestors | descendants | both | sourceforge
Files: files | file ages | folders
SHA1:016669885b3cd7ce13d51785a951c75068732b77
User & Date: rmsimpson 2008-09-03 05:03:45
Context
2008-09-22
16:02
1.0.59.0 check-in: eb68645c41 user: rmsimpson tags: sourceforge
2008-09-03
05:03
pre 1.0.59.0 check-in: 016669885b user: rmsimpson tags: sourceforge
2008-09-02
15:46
pre 1.0.59.0 check-in: c0dab1edea user: rmsimpson tags: sourceforge
Changes
Hide Diffs Unified Diffs Ignore Whitespace Patch

Added SQLite.Designer/Resources/ToolboxItems.txt.









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[SQLite]
System.Data.SQLite.SQLiteConnection, System.Data.SQLite
System.Data.SQLite.SQLiteDataAdapter, System.Data.SQLite
System.Data.SQLite.SQLiteCommand, System.Data.SQLite

Added System.Data.SQLite.Linq/Properties/Resources.Designer.cs.



























































































































































































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//------------------------------------------------------------------------------
// <auto-generated>
//     This code was generated by a tool.
//     Runtime Version:2.0.50727.3053
//
//     Changes to this file may cause incorrect behavior and will be lost if
//     the code is regenerated.
// </auto-generated>
//------------------------------------------------------------------------------

namespace System.Data.SQLite.Properties {
    using System;
    
    
    /// <summary>
    ///   A strongly-typed resource class, for looking up localized strings, etc.
    /// </summary>
    // This class was auto-generated by the StronglyTypedResourceBuilder
    // class via a tool like ResGen or Visual Studio.
    // To add or remove a member, edit your .ResX file then rerun ResGen
    // with the /str option, or rebuild your VS project.
    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("System.Resources.Tools.StronglyTypedResourceBuilder", "2.0.0.0")]
    [global::System.Diagnostics.DebuggerNonUserCodeAttribute()]
    [global::System.Runtime.CompilerServices.CompilerGeneratedAttribute()]
    internal class Resources {
        
        private static global::System.Resources.ResourceManager resourceMan;
        
        private static global::System.Globalization.CultureInfo resourceCulture;
        
        [global::System.Diagnostics.CodeAnalysis.SuppressMessageAttribute("Microsoft.Performance", "CA1811:AvoidUncalledPrivateCode")]
        internal Resources() {
        }
        
        /// <summary>
        ///   Returns the cached ResourceManager instance used by this class.
        /// </summary>
        [global::System.ComponentModel.EditorBrowsableAttribute(global::System.ComponentModel.EditorBrowsableState.Advanced)]
        internal static global::System.Resources.ResourceManager ResourceManager {
            get {
                if (object.ReferenceEquals(resourceMan, null)) {
                    global::System.Resources.ResourceManager temp = new global::System.Resources.ResourceManager("System.Data.SQLite.Properties.Resources", typeof(Resources).Assembly);
                    resourceMan = temp;
                }
                return resourceMan;
            }
        }
        
        /// <summary>
        ///   Overrides the current thread's CurrentUICulture property for all
        ///   resource lookups using this strongly typed resource class.
        /// </summary>
        [global::System.ComponentModel.EditorBrowsableAttribute(global::System.ComponentModel.EditorBrowsableState.Advanced)]
        internal static global::System.Globalization.CultureInfo Culture {
            get {
                return resourceCulture;
            }
            set {
                resourceCulture = value;
            }
        }
        
        /// <summary>
        ///   Looks up a localized string similar to CREATE TEMP VIEW SCHEMACONSTRAINTCOLUMNS AS
        ///SELECT CONSTRAINT_CATALOG, NULL AS CONSTRAINT_SCHEMA, CONSTRAINT_NAME, TABLE_CATALOG, NULL AS TABLE_SCHEMA, TABLE_NAME, COLUMN_NAME 
        ///FROM TEMP.SCHEMAINDEXCOLUMNS
        ///UNION
        ///SELECT CONSTRAINT_CATALOG, NULL, CONSTRAINT_NAME, TABLE_CATALOG, NULL, TABLE_NAME, FKEY_FROM_COLUMN
        ///FROM TEMP.SCHEMAFOREIGNKEYS;.
        /// </summary>
        internal static string SQL_CONSTRAINTCOLUMNS {
            get {
                return ResourceManager.GetString("SQL_CONSTRAINTCOLUMNS", resourceCulture);
            }
        }
        
        /// <summary>
        ///   Looks up a localized string similar to CREATE TEMP VIEW SCHEMACONSTRAINTS AS
        ///SELECT INDEX_CATALOG AS CONSTRAINT_CATALOG, NULL AS CONSTRAINT_SCHEMA, INDEX_NAME AS CONSTRAINT_NAME, TABLE_CATALOG, NULL AS TABLE_SCHEMA, TABLE_NAME, &apos;PRIMARY KEY&apos; AS CONSTRAINT_TYPE, 0 AS IS_DEFERRABLE, 0 AS INITIALLY_DEFERRED, NULL AS CHECK_CLAUSE
        ///FROM TEMP.SCHEMAINDEXES WHERE PRIMARY_KEY = 1
        ///UNION
        ///SELECT INDEX_CATALOG, NULL, INDEX_NAME, TABLE_CATALOG, NULL, TABLE_NAME, &apos;UNIQUE&apos;, 0, 0, NULL 
        ///FROM TEMP.SCHEMAINDEXES WHERE PRIMARY_KEY = 0 AND [UNIQUE] = 1
        ///UNION
        /// [rest of string was truncated]&quot;;.
        /// </summary>
        internal static string SQL_CONSTRAINTS {
            get {
                return ResourceManager.GetString("SQL_CONSTRAINTS", resourceCulture);
            }
        }
    }
}

Added System.Data.SQLite.Linq/Properties/Resources.resx.























































































































































































































































































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<?xml version="1.0" encoding="utf-8"?>
<root>
  <!-- 
    Microsoft ResX Schema 
    
    Version 2.0
    
    The primary goals of this format is to allow a simple XML format 
    that is mostly human readable. The generation and parsing of the 
    various data types are done through the TypeConverter classes 
    associated with the data types.
    
    Example:
    
    ... ado.net/XML headers & schema ...
    <resheader name="resmimetype">text/microsoft-resx</resheader>
    <resheader name="version">2.0</resheader>
    <resheader name="reader">System.Resources.ResXResourceReader, System.Windows.Forms, ...</resheader>
    <resheader name="writer">System.Resources.ResXResourceWriter, System.Windows.Forms, ...</resheader>
    <data name="Name1"><value>this is my long string</value><comment>this is a comment</comment></data>
    <data name="Color1" type="System.Drawing.Color, System.Drawing">Blue</data>
    <data name="Bitmap1" mimetype="application/x-microsoft.net.object.binary.base64">
        <value>[base64 mime encoded serialized .NET Framework object]</value>
    </data>
    <data name="Icon1" type="System.Drawing.Icon, System.Drawing" mimetype="application/x-microsoft.net.object.bytearray.base64">
        <value>[base64 mime encoded string representing a byte array form of the .NET Framework object]</value>
        <comment>This is a comment</comment>
    </data>
                
    There are any number of "resheader" rows that contain simple 
    name/value pairs.
    
    Each data row contains a name, and value. The row also contains a 
    type or mimetype. Type corresponds to a .NET class that support 
    text/value conversion through the TypeConverter architecture. 
    Classes that don't support this are serialized and stored with the 
    mimetype set.
    
    The mimetype is used for serialized objects, and tells the 
    ResXResourceReader how to depersist the object. This is currently not 
    extensible. For a given mimetype the value must be set accordingly:
    
    Note - application/x-microsoft.net.object.binary.base64 is the format 
    that the ResXResourceWriter will generate, however the reader can 
    read any of the formats listed below.
    
    mimetype: application/x-microsoft.net.object.binary.base64
    value   : The object must be serialized with 
            : System.Runtime.Serialization.Formatters.Binary.BinaryFormatter
            : and then encoded with base64 encoding.
    
    mimetype: application/x-microsoft.net.object.soap.base64
    value   : The object must be serialized with 
            : System.Runtime.Serialization.Formatters.Soap.SoapFormatter
            : and then encoded with base64 encoding.

    mimetype: application/x-microsoft.net.object.bytearray.base64
    value   : The object must be serialized into a byte array 
            : using a System.ComponentModel.TypeConverter
            : and then encoded with base64 encoding.
    -->
  <xsd:schema id="root" xmlns="" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:msdata="urn:schemas-microsoft-com:xml-msdata">
    <xsd:import namespace="http://www.w3.org/XML/1998/namespace" />
    <xsd:element name="root" msdata:IsDataSet="true">
      <xsd:complexType>
        <xsd:choice maxOccurs="unbounded">
          <xsd:element name="metadata">
            <xsd:complexType>
              <xsd:sequence>
                <xsd:element name="value" type="xsd:string" minOccurs="0" />
              </xsd:sequence>
              <xsd:attribute name="name" use="required" type="xsd:string" />
              <xsd:attribute name="type" type="xsd:string" />
              <xsd:attribute name="mimetype" type="xsd:string" />
              <xsd:attribute ref="xml:space" />
            </xsd:complexType>
          </xsd:element>
          <xsd:element name="assembly">
            <xsd:complexType>
              <xsd:attribute name="alias" type="xsd:string" />
              <xsd:attribute name="name" type="xsd:string" />
            </xsd:complexType>
          </xsd:element>
          <xsd:element name="data">
            <xsd:complexType>
              <xsd:sequence>
                <xsd:element name="value" type="xsd:string" minOccurs="0" msdata:Ordinal="1" />
                <xsd:element name="comment" type="xsd:string" minOccurs="0" msdata:Ordinal="2" />
              </xsd:sequence>
              <xsd:attribute name="name" type="xsd:string" use="required" msdata:Ordinal="1" />
              <xsd:attribute name="type" type="xsd:string" msdata:Ordinal="3" />
              <xsd:attribute name="mimetype" type="xsd:string" msdata:Ordinal="4" />
              <xsd:attribute ref="xml:space" />
            </xsd:complexType>
          </xsd:element>
          <xsd:element name="resheader">
            <xsd:complexType>
              <xsd:sequence>
                <xsd:element name="value" type="xsd:string" minOccurs="0" msdata:Ordinal="1" />
              </xsd:sequence>
              <xsd:attribute name="name" type="xsd:string" use="required" />
            </xsd:complexType>
          </xsd:element>
        </xsd:choice>
      </xsd:complexType>
    </xsd:element>
  </xsd:schema>
  <resheader name="resmimetype">
    <value>text/microsoft-resx</value>
  </resheader>
  <resheader name="version">
    <value>2.0</value>
  </resheader>
  <resheader name="reader">
    <value>System.Resources.ResXResourceReader, System.Windows.Forms, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089</value>
  </resheader>
  <resheader name="writer">
    <value>System.Resources.ResXResourceWriter, System.Windows.Forms, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089</value>
  </resheader>
  <data name="SQL_CONSTRAINTCOLUMNS" xml:space="preserve">
    <value>CREATE TEMP VIEW SCHEMACONSTRAINTCOLUMNS AS
SELECT CONSTRAINT_CATALOG, NULL AS CONSTRAINT_SCHEMA, CONSTRAINT_NAME, TABLE_CATALOG, NULL AS TABLE_SCHEMA, TABLE_NAME, COLUMN_NAME 
FROM TEMP.SCHEMAINDEXCOLUMNS
UNION
SELECT CONSTRAINT_CATALOG, NULL, CONSTRAINT_NAME, TABLE_CATALOG, NULL, TABLE_NAME, FKEY_FROM_COLUMN
FROM TEMP.SCHEMAFOREIGNKEYS;</value>
  </data>
  <data name="SQL_CONSTRAINTS" xml:space="preserve">
    <value>CREATE TEMP VIEW SCHEMACONSTRAINTS AS
SELECT INDEX_CATALOG AS CONSTRAINT_CATALOG, NULL AS CONSTRAINT_SCHEMA, INDEX_NAME AS CONSTRAINT_NAME, TABLE_CATALOG, NULL AS TABLE_SCHEMA, TABLE_NAME, 'PRIMARY KEY' AS CONSTRAINT_TYPE, 0 AS IS_DEFERRABLE, 0 AS INITIALLY_DEFERRED, NULL AS CHECK_CLAUSE
FROM TEMP.SCHEMAINDEXES WHERE PRIMARY_KEY = 1
UNION
SELECT INDEX_CATALOG, NULL, INDEX_NAME, TABLE_CATALOG, NULL, TABLE_NAME, 'UNIQUE', 0, 0, NULL 
FROM TEMP.SCHEMAINDEXES WHERE PRIMARY_KEY = 0 AND [UNIQUE] = 1
UNION
SELECT CONSTRAINT_CATALOG, NULL, CONSTRAINT_NAME, TABLE_CATALOG, NULL, TABLE_NAME, CONSTRAINT_TYPE, IS_DEFERRABLE, INITIALLY_DEFERRED, NULL 
FROM TEMP.SCHEMAFOREIGNKEYS;</value>
  </data>
</root>

Changes to System.Data.SQLite.Linq/SQL.

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//---------------------------------------------------------------------
// <copyright file="TopClause.cs" company="Microsoft">
//      Copyright (c) Microsoft Corporation.  All rights reserved.
// </copyright>
//---------------------------------------------------------------------


namespace System.Data.SQLite
{
  using System;
  using System.Collections.Generic;
  using System.Diagnostics;
  using System.Globalization;
  using System.IO;
  using System.Text;
  using System.Data.Metadata.Edm;

  using System.Data.Common.CommandTrees;

  /// <summary>
  /// TopClause represents the a TOP expression in a SqlSelectStatement. 

  /// It has a count property, which indicates how many TOP rows should be selected and a 
  /// boolen WithTies property.
  /// </summary>
  class TopClause : ISqlFragment
  {
    ISqlFragment topCount;
    bool withTies;


    /// <summary>
    /// Do we need to add a WITH_TIES to the top statement
    /// </summary>
    internal bool WithTies
    {
      get { return withTies; }


    }

    /// <summary>
    /// How many top rows should be selected.

    /// </summary>







    internal ISqlFragment TopCount
    {





      get { return topCount; }
    }

    /// <summary>
    /// Creates a TopClause with the given topCount and withTies.
    /// </summary>
    /// <param name="topCount"></param>
    /// <param name="withTies"></param>
    internal TopClause(ISqlFragment topCount, bool withTies)
    {
      this.topCount = topCount;
      this.withTies = withTies;
    }

    /// <summary>


    /// Creates a TopClause with the given topCount and withTies.
    /// </summary>
    /// <param name="topCount"></param>


    /// <param name="withTies"></param>
    internal TopClause(int topCount, bool withTies)
    {
      SqlBuilder sqlBuilder = new SqlBuilder();
      sqlBuilder.Append(topCount.ToString(CultureInfo.InvariantCulture));
      this.topCount = sqlBuilder;
      this.withTies = withTies;

    }





    #region ISqlFragment Members

    /// <summary>
    /// Write out the TOP part of sql select statement 
    /// It basically writes TOP (X) [WITH TIES].


    /// </summary>
    /// <param name="writer"></param>

    /// <param name="sqlGenerator"></param>
    public void WriteSql(SqlWriter writer, SqlGenerator sqlGenerator)

    {
      writer.Write(" LIMIT ");
      this.TopCount.WriteSql(writer, sqlGenerator);

      if (this.WithTies)










































        throw new NotSupportedException("WITH TIES");

      //writer.Write(" ");

      //if (this.WithTies)
      //{
      //    writer.Write("WITH TIES ");
      //}




    }


    #endregion
  }



}






























































































































































































































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/********************************************************
 * 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!
 ********************************************************/

namespace System.Data.SQLite
{
  using System;
  using System.Collections.Generic;
  using System.Data;
  using System.Data.Common.CommandTrees;
  using System.Data.Entity;
  using System.Runtime.CompilerServices;


  internal class SqlChecker : DbExpressionVisitor<bool>
  {
    private static Type sql8rewriter;


    static SqlChecker()



    {


      sql8rewriter = Type.GetType("System.Data.SqlClient.SqlGen.Sql8ExpressionRewriter, System.Data.Entity, Version=3.5.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089", false);
    }






    private SqlChecker()
    {
    }

    /// <summary>

    /// SQLite doesn't support things like SKIP and a few other things.  So determine if the query has to be rewritten
    /// </summary>
    /// <remarks>
    /// Microsoft went to all the trouble of making things like SKIP work on Sql Server 2000 by doing a rewrite of the commandtree.
    /// However, all that fancy stuff is hidden from us.  Thanks to reflection however, we can go ahead and use the Sql 2000 rewriter code
    /// they made.
    /// </remarks>
    /// <param name="tree">The tree to inspect for a rewrite</param>
    /// <returns>Returns a new query tree if it needs rewriting</returns>
    internal static DbQueryCommandTree Rewrite(DbQueryCommandTree tree)
    {
      SqlChecker visitor = new SqlChecker();
      if (tree.Query.Accept<bool>(visitor))
      {
        tree = sql8rewriter.InvokeMember("Rewrite", System.Reflection.BindingFlags.NonPublic | System.Reflection.BindingFlags.InvokeMethod | System.Reflection.BindingFlags.Static, null, null, new object[] { tree }) as DbQueryCommandTree;
      }      
      return tree;
    }






    public override bool Visit(DbAndExpression expression)
    {
      return VisitBinaryExpression(expression);

    }


    public override bool Visit(DbApplyExpression expression)
    {
      throw new NotSupportedException("apply expression");


    }

    public override bool Visit(DbArithmeticExpression expression)

    {




      return VisitExpressionList(expression.Arguments);
    }

    public override bool Visit(DbCaseExpression expression)
    {
      bool flag1 = VisitExpressionList(expression.When);
      bool flag2 = VisitExpressionList(expression.Then);
      bool flag3 = VisitExpression(expression.Else);

      return (flag1 || flag2 || flag3);


    }

    public override bool Visit(DbCastExpression expression)

    {
      return VisitUnaryExpression(expression);

    }

    public override bool Visit(DbComparisonExpression expression)

    {

      return VisitBinaryExpression(expression);
    }

    public override bool Visit(DbConstantExpression expression)
    {
      return false;
    }

    public override bool Visit(DbCrossJoinExpression expression)
    {
      return VisitExpressionBindingList(expression.Inputs);
    }

    public override bool Visit(DbDerefExpression expression)
    {
      return VisitUnaryExpression(expression);
    }

    public override bool Visit(DbDistinctExpression expression)
    {
      return VisitUnaryExpression(expression);
    }

    public override bool Visit(DbElementExpression expression)
    {
      return VisitUnaryExpression(expression);
    }

    public override bool Visit(DbEntityRefExpression expression)
    {
      return VisitUnaryExpression(expression);
    }

    public override bool Visit(DbExceptExpression expression)
    {
      VisitExpression(expression.Left);
      VisitExpression(expression.Right);
      return true;
    }

    public override bool Visit(DbExpression expression)
    {
      throw new NotSupportedException(expression.GetType().FullName);
    }






    public override bool Visit(DbFilterExpression expression)
    {
      bool flag1 = VisitExpressionBinding(expression.Input);
      bool flag2 = VisitExpression(expression.Predicate);

      return (flag1 || flag2);
    }


    public override bool Visit(DbFunctionExpression expression)
    {
      return VisitExpressionList(expression.Arguments);
    }

    public override bool Visit(DbGroupByExpression expression)
    {
      bool flag1 = VisitExpression(expression.Input.Expression);
      bool flag2 = VisitExpressionList(expression.Keys);
      bool flag3 = VisitAggregateList(expression.Aggregates);

      return (flag1 || flag2 || flag3);
    }

    public override bool Visit(DbIntersectExpression expression)
    {
      VisitExpression(expression.Left);
      VisitExpression(expression.Right);
      return true;
    }

    public override bool Visit(DbIsEmptyExpression expression)
    {
      return VisitUnaryExpression(expression);
    }

    public override bool Visit(DbIsNullExpression expression)
    {
      return VisitUnaryExpression(expression);
    }

    public override bool Visit(DbIsOfExpression expression)
    {
      return VisitUnaryExpression(expression);
    }

    public override bool Visit(DbJoinExpression expression)
    {
      bool flag1 = VisitExpressionBinding(expression.Left);
      bool flag2 = VisitExpressionBinding(expression.Right);
      bool flag3 = VisitExpression(expression.JoinCondition);
      return (flag1 || flag2 || flag3);
    }

    public override bool Visit(DbLikeExpression expression)
    {
      bool flag1 = VisitExpression(expression.Argument);
      bool flag2 = VisitExpression(expression.Pattern);
      bool flag3 = VisitExpression(expression.Escape);
      return (flag1 || flag2 || flag3);
    }

    public override bool Visit(DbLimitExpression expression)
    {
      return VisitExpression(expression.Argument);
    }

    public override bool Visit(DbNewInstanceExpression expression)
    {
      return VisitExpressionList(expression.Arguments);
    }

    public override bool Visit(DbNotExpression expression)
    {
      return VisitUnaryExpression(expression);
    }

    public override bool Visit(DbNullExpression expression)
    {
      return false;
    }

    public override bool Visit(DbOfTypeExpression expression)
    {
      return VisitUnaryExpression(expression);
    }

    public override bool Visit(DbOrExpression expression)
    {
      return VisitBinaryExpression(expression);
    }

    public override bool Visit(DbParameterReferenceExpression expression)
    {
      return false;
    }

    public override bool Visit(DbProjectExpression expression)
    {
      bool flag1 = VisitExpressionBinding(expression.Input);
      bool flag2 = VisitExpression(expression.Projection);
      return (flag1 || flag2);
    }

    public override bool Visit(DbPropertyExpression expression)
    {
      return VisitExpression(expression.Instance);
    }

    public override bool Visit(DbQuantifierExpression expression)
    {
      bool flag1 = VisitExpressionBinding(expression.Input);
      bool flag2 = VisitExpression(expression.Predicate);
      return (flag1 || flag2);
    }

    public override bool Visit(DbRefExpression expression)
    {
      return VisitUnaryExpression(expression);
    }

    public override bool Visit(DbRefKeyExpression expression)
    {
      return VisitUnaryExpression(expression);
    }

    public override bool Visit(DbRelationshipNavigationExpression expression)
    {
      return VisitExpression(expression.NavigationSource);
    }

    public override bool Visit(DbScanExpression expression)
    {
      return false;
    }

    public override bool Visit(DbSkipExpression expression)
    {
      VisitExpressionBinding(expression.Input);
      VisitSortClauseList(expression.SortOrder);
      VisitExpression(expression.Count);
      return true;
    }

    public override bool Visit(DbSortExpression expression)
    {
      bool flag1 = VisitExpressionBinding(expression.Input);
      bool flag2 = VisitSortClauseList(expression.SortOrder);
      return (flag1 || flag2);
    }

    public override bool Visit(DbTreatExpression expression)
    {
      return VisitUnaryExpression(expression);
    }

    public override bool Visit(DbUnionAllExpression expression)
    {
      return VisitBinaryExpression(expression);
    }

    public override bool Visit(DbVariableReferenceExpression expression)
    {
      return false;
    }

    private bool VisitAggregate(DbAggregate aggregate)
    {
      return VisitExpressionList(aggregate.Arguments);
    }

    private bool VisitAggregateList(IList<DbAggregate> list)
    {
      return VisitList<DbAggregate>(new ListElementHandler<DbAggregate>(VisitAggregate), list);
    }

    private bool VisitBinaryExpression(DbBinaryExpression expr)
    {
      bool flag1 = VisitExpression(expr.Left);
      bool flag2 = VisitExpression(expr.Right);
      return (flag1 || flag2);
    }

    private bool VisitExpression(DbExpression expression)
    {
      if (expression == null)
      {
        return false;
      }
      return expression.Accept<bool>(this);
    }

    private bool VisitExpressionBinding(DbExpressionBinding expressionBinding)
    {
      return VisitExpression(expressionBinding.Expression);
    }

    private bool VisitExpressionBindingList(IList<DbExpressionBinding> list)
    {
      return VisitList<DbExpressionBinding>(new ListElementHandler<DbExpressionBinding>(VisitExpressionBinding), list);
    }

    private bool VisitExpressionList(IList<DbExpression> list)
    {
      return VisitList<DbExpression>(new ListElementHandler<DbExpression>(VisitExpression), list);
    }

    private static bool VisitList<TElementType>(ListElementHandler<TElementType> handler, IList<TElementType> list)
    {
      bool flag = false;
      foreach (TElementType local in list)
      {
        bool flag2 = handler(local);
        flag = flag || flag2;
      }
      return flag;
    }

    private bool VisitSortClause(DbSortClause sortClause)
    {
      return VisitExpression(sortClause.Expression);
    }

    private bool VisitSortClauseList(IList<DbSortClause> list)
    {
      return VisitList<DbSortClause>(new ListElementHandler<DbSortClause>(VisitSortClause), list);
    }

    private bool VisitUnaryExpression(DbUnaryExpression expr)
    {
      return VisitExpression(expr.Argument);
    }

    private delegate bool ListElementHandler<TElementType>(TElementType element);
  }
}