Code:
/ 4.0 / 4.0 / untmp / DEVDIV_TFS / Dev10 / Releases / RTMRel / ndp / fx / src / DataEntity / System / Data / Common / CommandTrees / DbUpdateCommandTree.cs / 1305376 / DbUpdateCommandTree.cs
//---------------------------------------------------------------------- //// Copyright (c) Microsoft Corporation. All rights reserved. // // // @owner [....], [....] // @backupOwner [....] //--------------------------------------------------------------------- using System; using System.Collections.Generic; using System.Data.Metadata.Edm; using System.Data.Common.CommandTrees.Internal; using System.Data.Common.Utils; using System.Diagnostics; using ReadOnlyModificationClauses = System.Collections.ObjectModel.ReadOnlyCollection; // System.Data.Common.ReadOnlyCollection conflicts namespace System.Data.Common.CommandTrees { /// /// Represents a single-row update operation expressed as a canonical command tree. /// When the [System.Diagnostics.CodeAnalysis.SuppressMessage("Microsoft.Naming", "CA1709:IdentifiersShouldBeCasedCorrectly", MessageId = "Db")] public sealed class DbUpdateCommandTree : DbModificationCommandTree { private readonly DbExpression _predicate; private readonly DbExpression _returning; private readonly ReadOnlyModificationClauses _setClauses; internal DbUpdateCommandTree(MetadataWorkspace metadata, DataSpace dataSpace, DbExpressionBinding target, DbExpression predicate, ReadOnlyModificationClauses setClauses, DbExpression returning) : base(metadata, dataSpace, target) { EntityUtil.CheckArgumentNull(predicate, "predicate"); EntityUtil.CheckArgumentNull(setClauses, "setClauses"); // returning is allowed to be null this._predicate = predicate; this._setClauses = setClauses; this._returning = returning; } ///property is set, the command returns a reader; otherwise, /// it returns a scalar indicating the number of rows affected. /// /// Gets the list of update set clauses that define the update operation. /// public IListSetClauses { get { return _setClauses; } } /// /// Gets an ///that specifies a projection of results to be returned based on the modified rows. /// If null, indicates no results should be returned from this command. /// /// The returning projection includes only the following elements: /// public DbExpression Returning { get { return _returning; } } //////
///- NewInstance expression
///- Property expression
////// Gets an ///that specifies the predicate used to determine which members of the target collection should be updated. /// /// The predicate includes only the following elements: /// public DbExpression Predicate { get { return _predicate; } } internal override DbCommandTreeKind CommandTreeKind { get { return DbCommandTreeKind.Update; } } internal override bool HasReader { get { return null != Returning; } } internal override void DumpStructure(ExpressionDumper dumper) { base.DumpStructure(dumper); if (this.Predicate != null) { dumper.Dump(this.Predicate, "Predicate"); } dumper.Begin("SetClauses", null); foreach (DbModificationClause clause in this.SetClauses) { if (null != clause) { clause.DumpStructure(dumper); } } dumper.End("SetClauses"); dumper.Dump(this.Returning, "Returning"); } internal override string PrintTree(ExpressionPrinter printer) { return printer.Print(this); } } } // File provided for Reference Use Only by Microsoft Corporation (c) 2007.///
///- Equality expression
///- Constant expression
///- IsNull expression
///- Property expression
///- Reference expression to the target
///- And expression
///- Or expression
///- Not expression
///
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