Code:
/ 4.0 / 4.0 / untmp / DEVDIV_TFS / Dev10 / Releases / RTMRel / ndp / fx / src / DataEntity / System / Data / Query / InternalTrees / PhysicalOps.cs / 1305376 / PhysicalOps.cs
//---------------------------------------------------------------------- //// Copyright (c) Microsoft Corporation. All rights reserved. // // // @owner [....] // @backupOwner [....] //--------------------------------------------------------------------- using System; using System.Collections.Generic; using System.Data.Metadata.Edm; using System.Diagnostics; using System.Globalization; using System.Data.Query.PlanCompiler; using md = System.Data.Metadata.Edm; namespace System.Data.Query.InternalTrees { ////// A PhysicalProjectOp is a physical Op capping the entire command tree (and the /// subtrees of CollectOps). /// internal class PhysicalProjectOp : PhysicalOp { #region public methods ////// Instance for pattern matching in rules /// internal static readonly PhysicalProjectOp Pattern = new PhysicalProjectOp(); ////// Get the column map that describes how the result should be reshaped /// internal SimpleCollectionColumnMap ColumnMap { get { return m_columnMap; } } ////// Get the (ordered) list of output vars that this node produces /// internal VarList Outputs { get { return m_outputVars; } } ////// Visitor pattern method /// /// The BasicOpVisitor that is visiting this Op /// The Node that references this Op [DebuggerNonUserCode] internal override void Accept(BasicOpVisitor v, Node n) { v.Visit(this, n); } ////// Visitor pattern method for visitors with a return value /// /// The visitor /// The node in question ///An instance of TResultType [DebuggerNonUserCode] internal override TResultType Accept(BasicOpVisitorOfT v, Node n) { return v.Visit(this, n); } #endregion #region private constructors /// /// basic constructor /// /// List of outputs from this Op /// column map that describes the result to be shaped internal PhysicalProjectOp(VarList outputVars, SimpleCollectionColumnMap columnMap) : this() { Debug.Assert(null != columnMap, "null columnMap?"); m_outputVars = outputVars; m_columnMap = columnMap; } private PhysicalProjectOp() : base(OpType.PhysicalProject) { } #endregion #region private state private SimpleCollectionColumnMap m_columnMap; private VarList m_outputVars; #endregion } ////// Represents information about one collection being managed by the NestOps. /// The CollectionVar is a Var that represents the entire collection. /// internal class CollectionInfo { #region public methods ////// The collection-var /// internal Var CollectionVar { get { return m_collectionVar; } } ////// the column map for the collection element /// internal ColumnMap ColumnMap { get { return m_columnMap; } } ////// list of vars describing the collection element; flattened to remove /// nested collections /// internal VarList FlattenedElementVars { get { return m_flattenedElementVars; } } ////// list of keys specific to this collection /// internal VarVec Keys { get { return m_keys; } } ////// list of sort keys specific to this collection /// internal ListSortKeys { get { return m_sortKeys; } } /// /// Discriminator Value for this collection (for a given NestOp). /// Should we break this out into a subtype of CollectionInfo /// internal object DiscriminatorValue { get { return m_discriminatorValue; } } #endregion #region constructors internal CollectionInfo(Var collectionVar, ColumnMap columnMap, VarList flattenedElementVars, VarVec keys, ListsortKeys, object discriminatorValue) { m_collectionVar = collectionVar; m_columnMap = columnMap; m_flattenedElementVars = flattenedElementVars; m_keys = keys; m_sortKeys = sortKeys; m_discriminatorValue = discriminatorValue; } #endregion #region private state private Var m_collectionVar; // the collection Var private ColumnMap m_columnMap; // column map for the collection element private VarList m_flattenedElementVars; // elementVars, removing collections; private VarVec m_keys; //list of keys specific to this collection private List m_sortKeys; //list of sort keys specific to this collection private object m_discriminatorValue; #endregion } /// /// Base class for Nest operations /// internal abstract class NestBaseOp : PhysicalOp { #region publics ////// (Ordered) list of prefix sort keys (defines ordering of results) /// internal ListPrefixSortKeys { get { return m_prefixSortKeys; } } /// /// Outputs of the NestOp. Includes the Keys obviously, and one Var for each of /// the collections produced. In addition, this may also include non-key vars /// from the outer row /// internal VarVec Outputs { get { return m_outputs; } } ////// Information about each collection managed by the NestOp /// internal ListCollectionInfo { get { return m_collectionInfoList; } } #endregion #region constructors internal NestBaseOp(OpType opType, List prefixSortKeys, VarVec outputVars, List collectionInfoList) : base(opType) { m_outputs = outputVars; m_collectionInfoList = collectionInfoList; m_prefixSortKeys = prefixSortKeys; } #endregion #region private state private List m_prefixSortKeys; // list of sort key prefixes private VarVec m_outputs; // list of all output vars private List m_collectionInfoList; #endregion } /// /// Single-stream nest aggregation Op. /// (Somewhat similar to a group-by op - should we merge these?) /// internal class SingleStreamNestOp : NestBaseOp { #region publics ////// 1 child - the input /// internal override int Arity { get { return 1; } } ////// The discriminator Var (when there are multiple collections) /// internal Var Discriminator { get { return m_discriminator; } } ////// List of postfix sort keys (mostly to deal with multi-level nested collections) /// internal ListPostfixSortKeys { get { return m_postfixSortKeys; } } /// /// Set of keys for this nest operation /// internal VarVec Keys { get { return m_keys; } } ////// Visitor pattern method /// /// The BasicOpVisitor that is visiting this Op /// The Node that references this Op [DebuggerNonUserCode] internal override void Accept(BasicOpVisitor v, Node n) { v.Visit(this, n); } ////// Visitor pattern method for visitors with a return value /// /// The visitor /// The node in question ///An instance of TResultType [DebuggerNonUserCode] internal override TResultType Accept(BasicOpVisitorOfT v, Node n) { return v.Visit(this, n); } #endregion #region constructors internal SingleStreamNestOp(VarVec keys, List prefixSortKeys, List postfixSortKeys, VarVec outputVars, List collectionInfoList, Var discriminatorVar) : base(OpType.SingleStreamNest, prefixSortKeys, outputVars, collectionInfoList) { m_keys = keys; m_postfixSortKeys = postfixSortKeys; m_discriminator = discriminatorVar; } #endregion #region private state private VarVec m_keys; // keys for this operation private Var m_discriminator; // Var describing the discriminator List m_postfixSortKeys; // list of postfix sort keys #endregion } /// /// Represents a multi-stream nest operation. The first input represents the /// container row, while all the other inputs represent collections /// internal class MultiStreamNestOp : NestBaseOp { #region publics ////// Visitor pattern method /// /// The BasicOpVisitor that is visiting this Op /// The Node that references this Op [DebuggerNonUserCode] internal override void Accept(BasicOpVisitor v, Node n) { v.Visit(this, n); } ////// Visitor pattern method for visitors with a return value /// /// The visitor /// The node in question ///An instance of TResultType [DebuggerNonUserCode] internal override TResultType Accept(BasicOpVisitorOfT v, Node n) { return v.Visit(this, n); } #endregion #region constructors internal MultiStreamNestOp(List prefixSortKeys, VarVec outputVars, List collectionInfoList) : base(OpType.MultiStreamNest, prefixSortKeys, outputVars, collectionInfoList) { } #endregion #region private state #endregion } } // File provided for Reference Use Only by Microsoft Corporation (c) 2007.
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