Code:
/ 4.0 / 4.0 / DEVDIV_TFS / Dev10 / Releases / RTMRel / ndp / fx / src / DataEntity / System / Data / Query / PlanCompiler / ProviderCommandInfoUtils.cs / 1305376 / ProviderCommandInfoUtils.cs
//---------------------------------------------------------------------- //// Copyright (c) Microsoft Corporation. All rights reserved. // // // @owner [....] // @backupOwner [....] //--------------------------------------------------------------------- using System; using System.Collections.Generic; //using System.Diagnostics; // Please use PlanCompiler.Assert instead of Debug.Assert in this class... using System.Data.Common.CommandTrees; using System.Data.Common; using md = System.Data.Metadata.Edm; using System.Data.Query.InternalTrees; using System.Data.Query.PlanCompiler; namespace System.Data.Query.PlanCompiler { ////// Helper class for creating a ProviderCommandInfo given an Iqt Node. /// internal static class ProviderCommandInfoUtils { #region Public Methods ////// Creates a ProviderCommandInfo for the given node. /// This method should be called when the keys, foreign keys and sort keys are known ahead of time. /// Typically it is used when the original command is factored into multiple commands. /// /// The owning command, used for creating VarVecs, etc /// The root of the sub-command for which a ProviderCommandInfo should be generated /// A list of ProviderCommandInfos that were created for the child sub-commands. ///The resulting ProviderCommandInfo internal static ProviderCommandInfo Create( Command command, Node node, Listchildren) { PhysicalProjectOp projectOp = node.Op as PhysicalProjectOp; PlanCompiler.Assert(projectOp != null, "Expected root Op to be a physical Project"); // build up the CQT DbCommandTree ctree = CTreeGenerator.Generate(command, node); DbQueryCommandTree cqtree = ctree as DbQueryCommandTree; PlanCompiler.Assert(cqtree != null, "null query command tree"); // Get the rowtype for the result cqt md.CollectionType collType = TypeHelpers.GetEdmType (cqtree.Query.ResultType); PlanCompiler.Assert(md.TypeSemantics.IsRowType(collType.TypeUsage), "command rowtype is not a record"); // Build up a mapping from Vars to the corresponding output property/column Dictionary outputVarMap = BuildOutputVarMap(projectOp, collType.TypeUsage); return new ProviderCommandInfo(ctree, children); } /// /// Creates a ProviderCommandInfo for the given node. /// This method should be called when the keys and the sort keys are not known ahead of time. /// Typically it is used when there is only one command, that is no query factoring is done. /// This method also has the option of pulling up keys and sort information. /// /// The owning command, used for creating VarVecs, etc /// The root of the sub-command for which a ProviderCommandInfo should be generated ///The resulting ProviderCommandInfo internal static ProviderCommandInfo Create( Command command, Node node) { return Create( command, node, new List() //children ); } #endregion #region Private Methods /// /// Build up a mapping from Vars to the corresponding property of the output row type /// /// the physical projectOp /// output type ///a map from Vars to the output type member private static Dictionary BuildOutputVarMap(PhysicalProjectOp projectOp, md.TypeUsage outputType) { Dictionary outputVarMap = new Dictionary(); PlanCompiler.Assert(md.TypeSemantics.IsRowType(outputType), "PhysicalProjectOp result type is not a RowType?"); IEnumeratorpropertyEnumerator = TypeHelpers.GetEdmType (outputType).Properties.GetEnumerator(); IEnumerator varEnumerator = projectOp.Outputs.GetEnumerator(); while (true) { bool foundProp = propertyEnumerator.MoveNext(); bool foundVar = varEnumerator.MoveNext(); if (foundProp != foundVar) { throw EntityUtil.InternalError(EntityUtil.InternalErrorCode.ColumnCountMismatch, 1); } if (!foundProp) { break; } outputVarMap[varEnumerator.Current] = propertyEnumerator.Current; } return outputVarMap; } #endregion } } // File provided for Reference Use Only by Microsoft Corporation (c) 2007. //---------------------------------------------------------------------- // // Copyright (c) Microsoft Corporation. All rights reserved. // // // @owner [....] // @backupOwner [....] //--------------------------------------------------------------------- using System; using System.Collections.Generic; //using System.Diagnostics; // Please use PlanCompiler.Assert instead of Debug.Assert in this class... using System.Data.Common.CommandTrees; using System.Data.Common; using md = System.Data.Metadata.Edm; using System.Data.Query.InternalTrees; using System.Data.Query.PlanCompiler; namespace System.Data.Query.PlanCompiler { ////// Helper class for creating a ProviderCommandInfo given an Iqt Node. /// internal static class ProviderCommandInfoUtils { #region Public Methods ////// Creates a ProviderCommandInfo for the given node. /// This method should be called when the keys, foreign keys and sort keys are known ahead of time. /// Typically it is used when the original command is factored into multiple commands. /// /// The owning command, used for creating VarVecs, etc /// The root of the sub-command for which a ProviderCommandInfo should be generated /// A list of ProviderCommandInfos that were created for the child sub-commands. ///The resulting ProviderCommandInfo internal static ProviderCommandInfo Create( Command command, Node node, Listchildren) { PhysicalProjectOp projectOp = node.Op as PhysicalProjectOp; PlanCompiler.Assert(projectOp != null, "Expected root Op to be a physical Project"); // build up the CQT DbCommandTree ctree = CTreeGenerator.Generate(command, node); DbQueryCommandTree cqtree = ctree as DbQueryCommandTree; PlanCompiler.Assert(cqtree != null, "null query command tree"); // Get the rowtype for the result cqt md.CollectionType collType = TypeHelpers.GetEdmType (cqtree.Query.ResultType); PlanCompiler.Assert(md.TypeSemantics.IsRowType(collType.TypeUsage), "command rowtype is not a record"); // Build up a mapping from Vars to the corresponding output property/column Dictionary outputVarMap = BuildOutputVarMap(projectOp, collType.TypeUsage); return new ProviderCommandInfo(ctree, children); } /// /// Creates a ProviderCommandInfo for the given node. /// This method should be called when the keys and the sort keys are not known ahead of time. /// Typically it is used when there is only one command, that is no query factoring is done. /// This method also has the option of pulling up keys and sort information. /// /// The owning command, used for creating VarVecs, etc /// The root of the sub-command for which a ProviderCommandInfo should be generated ///The resulting ProviderCommandInfo internal static ProviderCommandInfo Create( Command command, Node node) { return Create( command, node, new List() //children ); } #endregion #region Private Methods /// /// Build up a mapping from Vars to the corresponding property of the output row type /// /// the physical projectOp /// output type ///a map from Vars to the output type member private static Dictionary BuildOutputVarMap(PhysicalProjectOp projectOp, md.TypeUsage outputType) { Dictionary outputVarMap = new Dictionary(); PlanCompiler.Assert(md.TypeSemantics.IsRowType(outputType), "PhysicalProjectOp result type is not a RowType?"); IEnumeratorpropertyEnumerator = TypeHelpers.GetEdmType (outputType).Properties.GetEnumerator(); IEnumerator varEnumerator = projectOp.Outputs.GetEnumerator(); while (true) { bool foundProp = propertyEnumerator.MoveNext(); bool foundVar = varEnumerator.MoveNext(); if (foundProp != foundVar) { throw EntityUtil.InternalError(EntityUtil.InternalErrorCode.ColumnCountMismatch, 1); } if (!foundProp) { break; } outputVarMap[varEnumerator.Current] = propertyEnumerator.Current; } return outputVarMap; } #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
- ObjectAssociationEndMapping.cs
- TimersDescriptionAttribute.cs
- SynchronizedInputProviderWrapper.cs
- OptimisticConcurrencyException.cs
- ConfigUtil.cs
- MulticastOption.cs
- TransactionChannelFaultConverter.cs
- XmlComplianceUtil.cs
- FacetValueContainer.cs
- SqlNamer.cs
- EventHandlingScope.cs
- SymmetricKeyWrap.cs
- CodeAccessSecurityEngine.cs
- SchemaImporterExtensionElement.cs
- TiffBitmapDecoder.cs
- DetailsViewModeEventArgs.cs
- ModelItemCollection.cs
- CompleteWizardStep.cs
- WebPartVerbsEventArgs.cs
- DataPointer.cs
- TypeBrowserDialog.cs
- AddInIpcChannel.cs
- LookupBindingPropertiesAttribute.cs
- ExecutionEngineException.cs
- SqlTypeConverter.cs
- CultureInfo.cs
- StreamInfo.cs
- BufferedWebEventProvider.cs
- xml.cs
- CodeTypeParameterCollection.cs
- SqlXml.cs
- CrossAppDomainChannel.cs
- ConstructorNeedsTagAttribute.cs
- Pair.cs
- FormsAuthenticationEventArgs.cs
- StackOverflowException.cs
- Label.cs
- EntityExpressionVisitor.cs
- CLRBindingWorker.cs
- Expressions.cs
- HierarchicalDataSourceDesigner.cs
- DoubleKeyFrameCollection.cs
- DataViewListener.cs
- FusionWrap.cs
- AccessorTable.cs
- FileLevelControlBuilderAttribute.cs
- ScriptIgnoreAttribute.cs
- MdiWindowListItemConverter.cs
- FrameworkTemplate.cs
- SimpleRecyclingCache.cs
- DataGridViewImageColumn.cs
- XPathItem.cs
- NetworkAddressChange.cs
- DataGridViewCellFormattingEventArgs.cs
- remotingproxy.cs
- SoapReflectionImporter.cs
- UseManagedPresentationBindingElementImporter.cs
- PresentationUIStyleResources.cs
- DoubleAnimationBase.cs
- TextSegment.cs
- ListBindableAttribute.cs
- PersistChildrenAttribute.cs
- Typography.cs
- CannotUnloadAppDomainException.cs
- ISAPIApplicationHost.cs
- RealizationContext.cs
- WindowsTooltip.cs
- ArrayConverter.cs
- EventlogProvider.cs
- GridViewDesigner.cs
- TrackBarRenderer.cs
- RemotingConfigParser.cs
- TextTabProperties.cs
- QueryContinueDragEventArgs.cs
- WebServicesSection.cs
- CodeRemoveEventStatement.cs
- EncodedStreamFactory.cs
- BamlRecordWriter.cs
- BitmapMetadataEnumerator.cs
- MaterialGroup.cs
- FamilyCollection.cs
- XmlDocumentFragment.cs
- DataContractJsonSerializer.cs
- SystemResourceHost.cs
- XmlSchemaGroupRef.cs
- ZipIOExtraFieldZip64Element.cs
- oledbmetadatacolumnnames.cs
- Queue.cs
- MappingException.cs
- FlowNode.cs
- XamlTreeBuilder.cs
- UnsafeNativeMethods.cs
- ErrorStyle.cs
- Renderer.cs
- ControlParameter.cs
- Separator.cs
- Matrix.cs
- FaultContractInfo.cs
- PagePropertiesChangingEventArgs.cs
- GenericsInstances.cs