PhysicalOps.cs source code in C# .NET

                        Code:
                         / Net / Net / 3.5.50727.3053 / DEVDIV / depot / DevDiv / releases / Orcas / SP / ndp / fx / src / DataEntity / System / Data / Query / InternalTrees / PhysicalOps.cs / 3 / PhysicalOps.cs
                        
                        
                            //---------------------------------------------------------------------- 
// 
//      Copyright (c) Microsoft Corporation.  All rights reserved.
// 
// 
// @owner  [....], [....]
//--------------------------------------------------------------------- 
 
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 List SortKeys 
        {
            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, List sortKeys, 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 List PrefixSortKeys
        {
            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 List CollectionInfo
        {
            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 List PostfixSortKeys
        { 
            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.
//---------------------------------------------------------------------- 
// 
//      Copyright (c) Microsoft Corporation.  All rights reserved.
// 
// 
// @owner  [....], [....]
//--------------------------------------------------------------------- 
 
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 List SortKeys 
        {
            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, List sortKeys, 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 List PrefixSortKeys
        {
            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 List CollectionInfo
        {
            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 List PostfixSortKeys
        { 
            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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