Code:
/ Net / Net / 3.5.50727.3053 / DEVDIV / depot / DevDiv / releases / Orcas / SP / ndp / fx / src / DataEntity / System / Data / Query / PlanCompiler / CodeGen.cs / 3 / CodeGen.cs
//---------------------------------------------------------------------- //// Copyright (c) Microsoft Corporation. All rights reserved. // // // @owner [....], [....] //--------------------------------------------------------------------- using System; using System.Collections.Generic; //using System.Diagnostics; // Please use PlanCompiler.Assert instead of Debug.Assert in this class... using System.Globalization; using md = System.Data.Metadata.Edm; using System.Data.Common.CommandTrees; using System.Data.Query.InternalTrees; using System.Data.Query.PlanCompiler; // // The CodeGen module is responsible for translating the ITree finally into a query // We assume that various tree transformations have taken place, and the tree // is finally ready to be executed. The CodeGen module // * converts the Itree into one or more CTrees (in S space) // * produces a ColumnMap to facilitate result assembly // * and wraps up everything in a plan object // // namespace System.Data.Query.PlanCompiler { internal class CodeGen { #region public methods ////// This involves /// * Converting the ITree into a set of ProviderCommandInfo objects /// * Creating a column map to enable result assembly /// Currently, we only produce a single ITree, and correspondingly, the /// following steps are trivial /// /// current compiler state /// CQTs for each store command /// column map to help in result assembly internal static void Process(PlanCompiler compilerState, out ListchildCommands, out ColumnMap resultColumnMap, out int columnCount) { CodeGen codeGen = new CodeGen(compilerState); codeGen.Process(out childCommands, out resultColumnMap, out columnCount); } #endregion #region constructors private CodeGen(PlanCompiler compilerState) { m_compilerState = compilerState; } #endregion #region private methods /// /// The real driver. This routine walks the tree, converts each subcommand /// into a CTree, and converts the columnmap into a real column map. /// Finally, it produces a "real" plan that can be used by the bridge execution, and /// returns this plan /// /// The root of the tree must be a PhysicalProjectOp. Each child of this Op /// represents a command to be executed, and the ColumnMap of this Op represents /// the eventual columnMap to be used for result assembly /// /// CQTs for store commands /// column map for result assembly private void Process(out ListchildCommands, out ColumnMap resultColumnMap, out int columnCount) { PhysicalProjectOp projectOp = (PhysicalProjectOp)this.Command.Root.Op; this.m_subCommands = new List (new Node[] { this.Command.Root }); childCommands = new List (new ProviderCommandInfo[] { ProviderCommandInfoUtils.Create( this.Command, this.Command.Root // input node )}); // Build the final column map, and count the columns we expect for it. resultColumnMap = BuildResultColumnMap(projectOp); columnCount = projectOp.Outputs.Count; } private ColumnMap BuildResultColumnMap(PhysicalProjectOp projectOp) { // convert the column map into a real column map // build up a dictionary mapping Vars to their real positions in the commands Dictionary> varMap = BuildVarMap(); ColumnMap realColumnMap = ColumnMapTranslator.Translate(projectOp.ColumnMap, varMap); return realColumnMap; } /// /// For each subcommand, build up a "location-map" for each top-level var that /// is projected out. This location map will ultimately be used to convert VarRefColumnMap /// into SimpleColumnMap /// private Dictionary> BuildVarMap() { Dictionary> varMap = new Dictionary>(); int commandId = 0; foreach (Node subCommand in m_subCommands) { PhysicalProjectOp projectOp = (PhysicalProjectOp)subCommand.Op; int columnPos = 0; foreach (Var v in projectOp.Outputs) { KeyValuePairvarLocation = new KeyValuePair (commandId, columnPos); varMap[v] = varLocation; columnPos++; } commandId++; } return varMap; } #endregion #region private state private PlanCompiler m_compilerState; private Command Command { get { return m_compilerState.Command; } } private List m_subCommands; #endregion } } // File provided for Reference Use Only by Microsoft Corporation (c) 2007. //---------------------------------------------------------------------- // // Copyright (c) Microsoft Corporation. All rights reserved. // // // @owner [....], [....] //--------------------------------------------------------------------- using System; using System.Collections.Generic; //using System.Diagnostics; // Please use PlanCompiler.Assert instead of Debug.Assert in this class... using System.Globalization; using md = System.Data.Metadata.Edm; using System.Data.Common.CommandTrees; using System.Data.Query.InternalTrees; using System.Data.Query.PlanCompiler; // // The CodeGen module is responsible for translating the ITree finally into a query // We assume that various tree transformations have taken place, and the tree // is finally ready to be executed. The CodeGen module // * converts the Itree into one or more CTrees (in S space) // * produces a ColumnMap to facilitate result assembly // * and wraps up everything in a plan object // // namespace System.Data.Query.PlanCompiler { internal class CodeGen { #region public methods ////// This involves /// * Converting the ITree into a set of ProviderCommandInfo objects /// * Creating a column map to enable result assembly /// Currently, we only produce a single ITree, and correspondingly, the /// following steps are trivial /// /// current compiler state /// CQTs for each store command /// column map to help in result assembly internal static void Process(PlanCompiler compilerState, out ListchildCommands, out ColumnMap resultColumnMap, out int columnCount) { CodeGen codeGen = new CodeGen(compilerState); codeGen.Process(out childCommands, out resultColumnMap, out columnCount); } #endregion #region constructors private CodeGen(PlanCompiler compilerState) { m_compilerState = compilerState; } #endregion #region private methods /// /// The real driver. This routine walks the tree, converts each subcommand /// into a CTree, and converts the columnmap into a real column map. /// Finally, it produces a "real" plan that can be used by the bridge execution, and /// returns this plan /// /// The root of the tree must be a PhysicalProjectOp. Each child of this Op /// represents a command to be executed, and the ColumnMap of this Op represents /// the eventual columnMap to be used for result assembly /// /// CQTs for store commands /// column map for result assembly private void Process(out ListchildCommands, out ColumnMap resultColumnMap, out int columnCount) { PhysicalProjectOp projectOp = (PhysicalProjectOp)this.Command.Root.Op; this.m_subCommands = new List (new Node[] { this.Command.Root }); childCommands = new List (new ProviderCommandInfo[] { ProviderCommandInfoUtils.Create( this.Command, this.Command.Root // input node )}); // Build the final column map, and count the columns we expect for it. resultColumnMap = BuildResultColumnMap(projectOp); columnCount = projectOp.Outputs.Count; } private ColumnMap BuildResultColumnMap(PhysicalProjectOp projectOp) { // convert the column map into a real column map // build up a dictionary mapping Vars to their real positions in the commands Dictionary> varMap = BuildVarMap(); ColumnMap realColumnMap = ColumnMapTranslator.Translate(projectOp.ColumnMap, varMap); return realColumnMap; } /// /// For each subcommand, build up a "location-map" for each top-level var that /// is projected out. This location map will ultimately be used to convert VarRefColumnMap /// into SimpleColumnMap /// private Dictionary> BuildVarMap() { Dictionary> varMap = new Dictionary>(); int commandId = 0; foreach (Node subCommand in m_subCommands) { PhysicalProjectOp projectOp = (PhysicalProjectOp)subCommand.Op; int columnPos = 0; foreach (Var v in projectOp.Outputs) { KeyValuePairvarLocation = new KeyValuePair (commandId, columnPos); varMap[v] = varLocation; columnPos++; } commandId++; } return varMap; } #endregion #region private state private PlanCompiler m_compilerState; private Command Command { get { return m_compilerState.Command; } } private List m_subCommands; #endregion } } // File provided for Reference Use Only by Microsoft Corporation (c) 2007.
Link Menu
This book is available now!
Buy at Amazon US or
Buy at Amazon UK
- PropertyChangedEventManager.cs
- DeferrableContent.cs
- SurrogateDataContract.cs
- PropertyChangedEventManager.cs
- TreeViewAutomationPeer.cs
- ReadOnlyHierarchicalDataSourceView.cs
- LoginUtil.cs
- MSAAEventDispatcher.cs
- NavigationFailedEventArgs.cs
- WebMessageBodyStyleHelper.cs
- DataGridViewTopRowAccessibleObject.cs
- GroupItemAutomationPeer.cs
- TableParagraph.cs
- MenuItemStyleCollection.cs
- ToolBar.cs
- X509Utils.cs
- ApplicationDirectory.cs
- QueryCacheKey.cs
- EventSchemaTraceListener.cs
- OdbcStatementHandle.cs
- DataControlButton.cs
- ResXDataNode.cs
- NameSpaceEvent.cs
- LinqDataSourceContextEventArgs.cs
- ExpressionsCollectionConverter.cs
- DynamicAttribute.cs
- AmbientLight.cs
- QilScopedVisitor.cs
- CreateUserWizardStep.cs
- ColorTransform.cs
- uribuilder.cs
- TabOrder.cs
- SerializableTypeCodeDomSerializer.cs
- DataGridViewColumnHeaderCell.cs
- Menu.cs
- AnnotationResourceChangedEventArgs.cs
- SchemaNames.cs
- ParameterCollection.cs
- NotificationContext.cs
- SessionStateUtil.cs
- LinqDataSourceUpdateEventArgs.cs
- WebServiceErrorEvent.cs
- cookiecontainer.cs
- InstanceOwnerException.cs
- RegexCompiler.cs
- StatusBarDrawItemEvent.cs
- Annotation.cs
- AccessControlEntry.cs
- Evidence.cs
- FileInfo.cs
- XPathParser.cs
- ArgumentNullException.cs
- QueryOperator.cs
- NameTable.cs
- DataGridView.cs
- XsltSettings.cs
- Win32Native.cs
- ComAwareEventInfo.cs
- NavigationEventArgs.cs
- ErrorTableItemStyle.cs
- DataTableReaderListener.cs
- XPathParser.cs
- Message.cs
- RC2CryptoServiceProvider.cs
- DecimalConverter.cs
- SingleConverter.cs
- BindableAttribute.cs
- Size3DConverter.cs
- regiisutil.cs
- ThicknessAnimationBase.cs
- XmlSchemaAnnotated.cs
- IApplicationTrustManager.cs
- COM2ICategorizePropertiesHandler.cs
- ButtonBaseAdapter.cs
- DocumentXPathNavigator.cs
- MessageEncodingBindingElement.cs
- HandleCollector.cs
- SkipQueryOptionExpression.cs
- TextContainer.cs
- RawMouseInputReport.cs
- AnimatedTypeHelpers.cs
- AnnotationHelper.cs
- DocumentSequence.cs
- AssemblyAttributes.cs
- TextServicesPropertyRanges.cs
- CollectionView.cs
- ProviderConnectionPointCollection.cs
- TableDetailsRow.cs
- ExpressionNode.cs
- ValidationError.cs
- XmlSchemaCollection.cs
- ReadonlyMessageFilter.cs
- SqlCacheDependencyDatabase.cs
- XmlUnspecifiedAttribute.cs
- GridViewRowCollection.cs
- entityreference_tresulttype.cs
- SR.cs
- ExtendedProperty.cs
- WebServiceParameterData.cs
- SubqueryRules.cs