mirror of https://gitee.com/bigwinds/arangodb
1296 lines
46 KiB
C++
1296 lines
46 KiB
C++
////////////////////////////////////////////////////////////////////////////////
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/// @brief Infrastructure for ExecutionBlocks (the execution engine)
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///
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/// @file arangod/Aql/ExecutionBlock.h
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///
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/// DISCLAIMER
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///
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/// Copyright 2010-2014 triagens GmbH, Cologne, Germany
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///
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/// Licensed under the Apache License, Version 2.0 (the "License");
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/// you may not use this file except in compliance with the License.
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/// You may obtain a copy of the License at
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///
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/// http://www.apache.org/licenses/LICENSE-2.0
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///
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/// Unless required by applicable law or agreed to in writing, software
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/// distributed under the License is distributed on an "AS IS" BASIS,
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/// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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/// See the License for the specific language governing permissions and
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/// limitations under the License.
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///
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/// Copyright holder is triAGENS GmbH, Cologne, Germany
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///
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/// @author Max Neunhoeffer
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/// @author Copyright 2014, triagens GmbH, Cologne, Germany
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////////////////////////////////////////////////////////////////////////////////
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#ifndef ARANGODB_AQL_EXECUTION_BLOCK_H
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#define ARANGODB_AQL_EXECUTION_BLOCK_H 1
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#include <Basics/JsonHelper.h>
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#include <ShapedJson/shaped-json.h>
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#include "Aql/Types.h"
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#include "Aql/AqlItemBlock.h"
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#include "Aql/Collection.h"
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#include "Aql/ExecutionNode.h"
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#include "Aql/WalkerWorker.h"
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#include "Utils/AqlTransaction.h"
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#include "Utils/transactions.h"
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#include "Utils/V8TransactionContext.h"
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namespace triagens {
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namespace aql {
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// -----------------------------------------------------------------------------
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// --SECTION-- AggregatorGroup
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// -----------------------------------------------------------------------------
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////////////////////////////////////////////////////////////////////////////////
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/// @brief details about the current group
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////////////////////////////////////////////////////////////////////////////////
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struct AggregatorGroup {
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std::vector<AqlValue> groupValues;
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std::vector<TRI_document_collection_t const*> collections;
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std::vector<AqlItemBlock*> groupBlocks;
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size_t firstRow;
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size_t lastRow;
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bool rowsAreValid;
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AggregatorGroup ()
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: firstRow(0),
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lastRow(0),
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rowsAreValid(false) {
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}
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~AggregatorGroup () {
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reset();
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}
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void initialize (size_t capacity);
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void reset ();
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void setFirstRow (size_t value) {
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firstRow = value;
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rowsAreValid = true;
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}
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void setLastRow (size_t value) {
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lastRow = value;
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rowsAreValid = true;
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}
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void addValues (AqlItemBlock const* src, RegisterId groupRegister);
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};
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// -----------------------------------------------------------------------------
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// --SECTION-- ExecutionBlock
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// -----------------------------------------------------------------------------
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class ExecutionBlock {
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public:
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////////////////////////////////////////////////////////////////////////////////
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/// @brief constructor
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////////////////////////////////////////////////////////////////////////////////
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ExecutionBlock (AQL_TRANSACTION_V8* trx,
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ExecutionNode const* ep)
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: _trx(trx), _exeNode(ep), _done(false), _depth(0),
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_varOverview(nullptr) {
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}
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////////////////////////////////////////////////////////////////////////////////
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/// @brief destructor
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////////////////////////////////////////////////////////////////////////////////
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virtual ~ExecutionBlock ();
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public:
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////////////////////////////////////////////////////////////////////////////////
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/// @brief functionality to walk an execution block recursively
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////////////////////////////////////////////////////////////////////////////////
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void walk (WalkerWorker<ExecutionBlock>* worker);
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////////////////////////////////////////////////////////////////////////////////
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/// @brief add a dependency
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////////////////////////////////////////////////////////////////////////////////
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void addDependency (ExecutionBlock* ep) {
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_dependencies.push_back(ep);
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}
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////////////////////////////////////////////////////////////////////////////////
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/// @brief get all dependencies
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////////////////////////////////////////////////////////////////////////////////
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std::vector<ExecutionBlock*> getDependencies () {
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return _dependencies;
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}
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////////////////////////////////////////////////////////////////////////////////
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/// @brief remove a dependency, returns true if the pointer was found and
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/// removed, please note that this does not delete ep!
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////////////////////////////////////////////////////////////////////////////////
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bool removeDependency (ExecutionBlock* ep);
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////////////////////////////////////////////////////////////////////////////////
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/// @brief access the pos-th dependency
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////////////////////////////////////////////////////////////////////////////////
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ExecutionBlock* operator[] (size_t pos) {
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if (pos >= _dependencies.size()) {
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return nullptr;
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}
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return _dependencies.at(pos);
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}
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////////////////////////////////////////////////////////////////////////////////
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/// @brief static analysis, walker class and information collector
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////////////////////////////////////////////////////////////////////////////////
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struct VarInfo {
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unsigned int const depth;
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RegisterId const registerId;
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VarInfo () = delete;
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VarInfo (int depth, int registerId)
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: depth(depth), registerId(registerId) {
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}
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};
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struct VarOverview : public WalkerWorker<ExecutionBlock> {
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// The following are collected for global usage in the ExecutionBlock:
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// map VariableIds to their depth and registerId:
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std::unordered_map<VariableId, VarInfo> varInfo;
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// number of variables in the frame of the current depth:
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std::vector<RegisterId> nrRegsHere;
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// number of variables in this and all outer frames together,
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// the entry with index i here is always the sum of all values
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// in nrRegsHere from index 0 to i (inclusively) and the two
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// have the same length:
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std::vector<RegisterId> nrRegs;
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// We collect the subquery blocks to deal with them at the end:
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std::vector<ExecutionBlock*> subQueryBlocks;
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// Local for the walk:
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unsigned int depth;
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unsigned int totalNrRegs;
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// This is used to tell all Blocks and share a pointer to ourselves
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shared_ptr<VarOverview>* me;
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VarOverview ()
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: depth(0), totalNrRegs(0), me(nullptr) {
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nrRegsHere.push_back(0);
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nrRegs.push_back(0);
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};
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void setSharedPtr (shared_ptr<VarOverview>* shared) {
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me = shared;
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}
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// Copy constructor used for a subquery:
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VarOverview (VarOverview const& v, unsigned int newdepth);
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~VarOverview () {};
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virtual bool enterSubquery (ExecutionBlock* super,
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ExecutionBlock* sub) {
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return false; // do not walk into subquery
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}
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virtual void after (ExecutionBlock *eb);
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};
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////////////////////////////////////////////////////////////////////////////////
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/// @brief Methods for execution
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/// Lifecycle is:
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/// CONSTRUCTOR
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/// then the ExecutionEngine automatically calls
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/// staticAnalysis() once, including subqueries
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/// then the ExecutionEngine automatically calls
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/// initialize() once, including subqueries
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/// possibly repeat many times:
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/// initCursor(...) (optionally with bind parameters)
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/// // use cursor functionality
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/// then the ExecutionEngine automatically calls
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/// shutdown()
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/// DESTRUCTOR
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////////////////////////////////////////////////////////////////////////////////
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////////////////////////////////////////////////////////////////////////////////
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/// @brief static analysis
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////////////////////////////////////////////////////////////////////////////////
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void staticAnalysis (ExecutionBlock* super = nullptr);
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////////////////////////////////////////////////////////////////////////////////
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/// @brief initialize
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////////////////////////////////////////////////////////////////////////////////
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virtual int initialize ();
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////////////////////////////////////////////////////////////////////////////////
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/// @brief initCursor, could be called multiple times
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////////////////////////////////////////////////////////////////////////////////
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virtual int initCursor (AqlItemBlock* items, size_t pos);
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////////////////////////////////////////////////////////////////////////////////
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/// @brief shutdown, will be called exactly once for the whole query
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////////////////////////////////////////////////////////////////////////////////
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virtual int shutdown ();
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////////////////////////////////////////////////////////////////////////////////
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/// @brief copy register data from one block (src) into another (dst)
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/// register values are cloned
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////////////////////////////////////////////////////////////////////////////////
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protected:
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void inheritRegisters (AqlItemBlock const* src,
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AqlItemBlock* dst,
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size_t row);
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////////////////////////////////////////////////////////////////////////////////
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/// @brief the following is internal to pull one more block and append it to
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/// our _buffer deque. Returns true if a new block was appended and false if
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/// the dependent node is exhausted.
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////////////////////////////////////////////////////////////////////////////////
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bool getBlock (size_t atLeast, size_t atMost);
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////////////////////////////////////////////////////////////////////////////////
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/// @brief getOne, gets one more item
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////////////////////////////////////////////////////////////////////////////////
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public:
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virtual AqlItemBlock* getOne () {
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return getSome(1, 1);
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}
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////////////////////////////////////////////////////////////////////////////////
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/// @brief getSome, gets some more items, semantic is as follows: not
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/// more than atMost items may be delivered. The method tries to
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/// return a block of at least atLeast items, however, it may return
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/// less (for example if there are not enough items to come). However,
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/// if it returns an actual block, it must contain at least one item.
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////////////////////////////////////////////////////////////////////////////////
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virtual AqlItemBlock* getSome (size_t atLeast, size_t atMost);
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////////////////////////////////////////////////////////////////////////////////
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/// @brief getSome, skips some more items, semantic is as follows: not
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/// more than atMost items may be skipped. The method tries to
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/// skip a block of at least atLeast items, however, it may skip
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/// less (for example if there are not enough items to come). The number of
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/// elements skipped is returned.
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////////////////////////////////////////////////////////////////////////////////
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virtual size_t skipSome (size_t atLeast, size_t atMost);
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// skip exactly <number> outputs, returns <true> if _done after
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// skipping, and <false> otherwise . . .
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bool skip (size_t number);
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virtual bool hasMore ();
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virtual int64_t count () {
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return _dependencies[0]->count();
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}
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virtual int64_t remaining ();
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ExecutionNode const* getPlanNode () {
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return _exeNode;
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}
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protected:
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////////////////////////////////////////////////////////////////////////////////
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/// @brief generic method to get or skip some
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////////////////////////////////////////////////////////////////////////////////
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virtual int getOrSkipSome (size_t atLeast,
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size_t atMost,
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bool skipping,
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AqlItemBlock*& result,
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size_t& skipped);
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////////////////////////////////////////////////////////////////////////////////
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/// @brief the transaction for this query
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////////////////////////////////////////////////////////////////////////////////
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AQL_TRANSACTION_V8* _trx;
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////////////////////////////////////////////////////////////////////////////////
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/// @brief our corresponding ExecutionNode node
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////////////////////////////////////////////////////////////////////////////////
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ExecutionNode const* _exeNode;
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////////////////////////////////////////////////////////////////////////////////
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/// @brief our dependent nodes
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////////////////////////////////////////////////////////////////////////////////
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std::vector<ExecutionBlock*> _dependencies;
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////////////////////////////////////////////////////////////////////////////////
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/// @brief this is our buffer for the items, it is a deque of AqlItemBlocks.
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/// We keep the following invariant between this and the other two variables
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/// _pos and _done: If _buffer.size() != 0, then 0 <= _pos < _buffer[0]->size()
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/// and _buffer[0][_pos] is the next item to be handed on. If _done is true,
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/// then no more documents will ever be returned. _done will be set to
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/// true if and only if we have no more data ourselves (i.e. _buffer.size()==0)
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/// and we have unsuccessfully tried to get another block from our dependency.
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////////////////////////////////////////////////////////////////////////////////
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std::deque<AqlItemBlock*> _buffer;
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////////////////////////////////////////////////////////////////////////////////
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/// @brief current working position in the first entry of _buffer
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////////////////////////////////////////////////////////////////////////////////
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size_t _pos;
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////////////////////////////////////////////////////////////////////////////////
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/// @brief if this is set, we are done, this is reset to false by execute()
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////////////////////////////////////////////////////////////////////////////////
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bool _done;
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////////////////////////////////////////////////////////////////////////////////
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/// @brief depth of frames (number of FOR statements here or above)
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////////////////////////////////////////////////////////////////////////////////
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int _depth; // will be filled in by staticAnalysis
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////////////////////////////////////////////////////////////////////////////////
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/// @brief info about variables, filled in by staticAnalysis
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////////////////////////////////////////////////////////////////////////////////
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std::shared_ptr<VarOverview> _varOverview;
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public:
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////////////////////////////////////////////////////////////////////////////////
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/// @brief batch size value
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////////////////////////////////////////////////////////////////////////////////
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static size_t const DefaultBatchSize;
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};
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// -----------------------------------------------------------------------------
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// --SECTION-- SingletonBlock
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// -----------------------------------------------------------------------------
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class SingletonBlock : public ExecutionBlock {
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public:
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SingletonBlock (AQL_TRANSACTION_V8* trx, SingletonNode const* ep)
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: ExecutionBlock(trx, ep), _inputRegisterValues(nullptr) {
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}
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~SingletonBlock () {
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if (_inputRegisterValues != nullptr) {
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delete _inputRegisterValues;
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_inputRegisterValues = nullptr;
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}
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}
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int initialize () {
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_inputRegisterValues = nullptr; // just in case
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return ExecutionBlock::initialize();
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}
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////////////////////////////////////////////////////////////////////////////////
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/// @brief initCursor, store a copy of the register values coming from above
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////////////////////////////////////////////////////////////////////////////////
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int initCursor (AqlItemBlock* items, size_t pos);
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int shutdown ();
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bool hasMore () {
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return ! _done;
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}
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int64_t count () {
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return 1;
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}
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int64_t remaining () {
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return _done ? 0 : 1;
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}
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////////////////////////////////////////////////////////////////////////////////
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/// @brief the bind data coming from outside
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////////////////////////////////////////////////////////////////////////////////
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private:
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int getOrSkipSome (size_t atLeast,
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size_t atMost,
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bool skipping,
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AqlItemBlock*& result,
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size_t& skipped);
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////////////////////////////////////////////////////////////////////////////////
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/// @brief _inputRegisterValues
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////////////////////////////////////////////////////////////////////////////////
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AqlItemBlock* _inputRegisterValues;
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};
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// -----------------------------------------------------------------------------
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// --SECTION-- EnumerateCollectionBlock
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// -----------------------------------------------------------------------------
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class EnumerateCollectionBlock : public ExecutionBlock {
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public:
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EnumerateCollectionBlock (AQL_TRANSACTION_V8* trx,
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EnumerateCollectionNode const* ep);
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~EnumerateCollectionBlock ();
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////////////////////////////////////////////////////////////////////////////////
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/// @brief initialize fetching of documents
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////////////////////////////////////////////////////////////////////////////////
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void initDocuments () {
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_internalSkip = 0;
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if (! moreDocuments()) {
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_done = true;
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}
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}
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////////////////////////////////////////////////////////////////////////////////
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/// @brief continue fetching of documents
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////////////////////////////////////////////////////////////////////////////////
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bool moreDocuments ();
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////////////////////////////////////////////////////////////////////////////////
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/// @brief initialize, here we fetch all docs from the database
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////////////////////////////////////////////////////////////////////////////////
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int initialize ();
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////////////////////////////////////////////////////////////////////////////////
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/// @brief initCursor, here we release our docs from this collection
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////////////////////////////////////////////////////////////////////////////////
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int initCursor (AqlItemBlock* items, size_t pos);
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AqlItemBlock* getSome (size_t atLeast, size_t atMost);
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////////////////////////////////////////////////////////////////////////////////
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// skip between atLeast and atMost, returns the number actually skipped . . .
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// will only return less than atLeast if there aren't atLeast many
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// things to skip overall.
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////////////////////////////////////////////////////////////////////////////////
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size_t skipSome (size_t atLeast, size_t atMost);
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// -----------------------------------------------------------------------------
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// --SECTION-- private variables
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// -----------------------------------------------------------------------------
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private:
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////////////////////////////////////////////////////////////////////////////////
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/// @brief collection
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////////////////////////////////////////////////////////////////////////////////
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Collection* _collection;
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////////////////////////////////////////////////////////////////////////////////
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/// @brief total number of documents in the collection
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////////////////////////////////////////////////////////////////////////////////
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uint32_t _totalCount;
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////////////////////////////////////////////////////////////////////////////////
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/// @brief internal skip value
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////////////////////////////////////////////////////////////////////////////////
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TRI_voc_size_t _internalSkip;
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////////////////////////////////////////////////////////////////////////////////
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/// @brief document buffer
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////////////////////////////////////////////////////////////////////////////////
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std::vector<TRI_doc_mptr_copy_t> _documents;
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////////////////////////////////////////////////////////////////////////////////
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/// @brief current position in _allDocs
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////////////////////////////////////////////////////////////////////////////////
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size_t _posInAllDocs;
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};
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// -----------------------------------------------------------------------------
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// --SECTION-- EnumerateListBlock
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// -----------------------------------------------------------------------------
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class EnumerateListBlock : public ExecutionBlock {
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public:
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EnumerateListBlock (AQL_TRANSACTION_V8* trx,
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EnumerateListNode const* ep)
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: ExecutionBlock(trx, ep) {
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}
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~EnumerateListBlock () {
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}
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int initialize ();
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////////////////////////////////////////////////////////////////////////////////
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/// @brief initCursor, here we release our docs from this collection
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////////////////////////////////////////////////////////////////////////////////
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int initCursor (AqlItemBlock* items, size_t pos);
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AqlItemBlock* getSome (size_t atLeast, size_t atMost);
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////////////////////////////////////////////////////////////////////////////////
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// skip between atLeast and atMost returns the number actually skipped . . .
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// will only return less than atLeast if there aren't atLeast many
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// things to skip overall.
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////////////////////////////////////////////////////////////////////////////////
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size_t skipSome (size_t atLeast, size_t atMost);
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////////////////////////////////////////////////////////////////////////////////
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/// @brief create an AqlValue from the inVariable using the current _index
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////////////////////////////////////////////////////////////////////////////////
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private:
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|
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AqlValue getAqlValue (AqlValue inVarReg);
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|
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////////////////////////////////////////////////////////////////////////////////
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/// @brief current position in the _inVariable
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////////////////////////////////////////////////////////////////////////////////
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size_t _index;
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////////////////////////////////////////////////////////////////////////////////
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/// @brief current block in DOCVEC
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////////////////////////////////////////////////////////////////////////////////
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size_t _thisblock;
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|
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////////////////////////////////////////////////////////////////////////////////
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/// @brief number of elements in DOCVEC before the current block
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////////////////////////////////////////////////////////////////////////////////
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size_t _seen;
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|
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////////////////////////////////////////////////////////////////////////////////
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/// @brief total number of elements in DOCVEC
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////////////////////////////////////////////////////////////////////////////////
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size_t _DOCVECsize;
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|
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////////////////////////////////////////////////////////////////////////////////
|
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/// @brief document collection from DOCVEC
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|
////////////////////////////////////////////////////////////////////////////////
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|
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TRI_document_collection_t const* _collection;
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|
|
|
////////////////////////////////////////////////////////////////////////////////
|
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/// @brief the register index containing the inVariable of the EnumerateListNode
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|
////////////////////////////////////////////////////////////////////////////////
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|
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RegisterId _inVarRegId;
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};
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|
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// -----------------------------------------------------------------------------
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// --SECTION-- CalculationBlock
|
|
// -----------------------------------------------------------------------------
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|
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class CalculationBlock : public ExecutionBlock {
|
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|
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public:
|
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|
|
CalculationBlock (AQL_TRANSACTION_V8* trx,
|
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CalculationNode const* en)
|
|
: ExecutionBlock(trx, en),
|
|
_expression(en->expression()),
|
|
_outReg(0) {
|
|
|
|
}
|
|
|
|
~CalculationBlock () {
|
|
}
|
|
|
|
int initialize ();
|
|
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
/// @brief doEvaluation, private helper to do the work
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
|
|
private:
|
|
|
|
void doEvaluation (AqlItemBlock* result);
|
|
|
|
public:
|
|
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
/// @brief getSome
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
|
|
virtual AqlItemBlock* getSome (size_t atLeast,
|
|
size_t atMost);
|
|
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
/// @brief we hold a pointer to the expression in the plan
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
|
|
private:
|
|
Expression* _expression;
|
|
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
/// @brief info about input variables
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
|
|
std::vector<Variable*> _inVars;
|
|
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
/// @brief info about input registers
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
|
|
std::vector<RegisterId> _inRegs;
|
|
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
/// @brief output register
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
|
|
RegisterId _outReg;
|
|
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
/// @brief whether or not the expression is a simple variable reference
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
|
|
bool _isReference;
|
|
|
|
};
|
|
|
|
// -----------------------------------------------------------------------------
|
|
// --SECTION-- SubqueryBlock
|
|
// -----------------------------------------------------------------------------
|
|
|
|
class SubqueryBlock : public ExecutionBlock {
|
|
|
|
public:
|
|
|
|
SubqueryBlock (AQL_TRANSACTION_V8* trx,
|
|
SubqueryNode const* en,
|
|
ExecutionBlock* subquery)
|
|
: ExecutionBlock(trx, en), _outReg(0),
|
|
_subquery(subquery) {
|
|
}
|
|
|
|
~SubqueryBlock () {
|
|
}
|
|
|
|
int initialize ();
|
|
|
|
virtual AqlItemBlock* getSome (size_t atLeast,
|
|
size_t atMost);
|
|
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
/// @brief getter for the pointer to the subquery
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
|
|
ExecutionBlock* getSubquery() {
|
|
return _subquery;
|
|
}
|
|
|
|
private:
|
|
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
/// @brief output register
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
|
|
RegisterId _outReg;
|
|
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
/// @brief we need to have an executionblock and where to write the result
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
|
|
ExecutionBlock* _subquery;
|
|
};
|
|
|
|
// -----------------------------------------------------------------------------
|
|
// --SECTION-- FilterBlock
|
|
// -----------------------------------------------------------------------------
|
|
|
|
class FilterBlock : public ExecutionBlock {
|
|
|
|
public:
|
|
|
|
FilterBlock (AQL_TRANSACTION_V8* trx, FilterNode const* ep)
|
|
: ExecutionBlock(trx, ep) {
|
|
}
|
|
|
|
~FilterBlock () {
|
|
}
|
|
|
|
int initialize ();
|
|
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
/// @brief internal function to actually decide
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
|
|
private:
|
|
|
|
bool takeItem (AqlItemBlock* items, size_t index) {
|
|
AqlValue v = items->getValue(index, _inReg);
|
|
return v.isTrue();
|
|
}
|
|
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
/// @brief internal function to get another block
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
|
|
bool getBlock (size_t atLeast, size_t atMost);
|
|
|
|
int getOrSkipSome (size_t atLeast,
|
|
size_t atMost,
|
|
bool skipping,
|
|
AqlItemBlock*& result,
|
|
size_t& skipped);
|
|
|
|
bool hasMore ();
|
|
|
|
int64_t count () {
|
|
return -1; // refuse to work
|
|
}
|
|
|
|
int64_t remaining () {
|
|
return -1; // refuse to work
|
|
}
|
|
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
/// @brief input register
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
|
|
private:
|
|
|
|
RegisterId _inReg;
|
|
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
/// @brief vector of indices of those documents in the current block
|
|
/// that are chosen
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
|
|
std::vector<size_t> _chosen;
|
|
|
|
};
|
|
|
|
// -----------------------------------------------------------------------------
|
|
// --SECTION-- AggregateBlock
|
|
// -----------------------------------------------------------------------------
|
|
|
|
class AggregateBlock : public ExecutionBlock {
|
|
|
|
public:
|
|
|
|
AggregateBlock (AQL_TRANSACTION_V8* trx,
|
|
ExecutionNode const* ep)
|
|
: ExecutionBlock(trx, ep),
|
|
_groupRegister(0),
|
|
_variableNames() {
|
|
}
|
|
|
|
virtual ~AggregateBlock () {};
|
|
|
|
int initialize ();
|
|
|
|
private:
|
|
|
|
int getOrSkipSome (size_t atLeast,
|
|
size_t atMost,
|
|
bool skipping,
|
|
AqlItemBlock*& result,
|
|
size_t& skipped);
|
|
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
/// @brief writes the current group data into the result
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
|
|
void emitGroup (AqlItemBlock const* cur,
|
|
AqlItemBlock* res,
|
|
size_t row);
|
|
|
|
private:
|
|
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
/// @brief pairs, consisting of out register and in register
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
|
|
std::vector<std::pair<RegisterId, RegisterId>> _aggregateRegisters;
|
|
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
/// @brief details about the current group
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
|
|
AggregatorGroup _currentGroup;
|
|
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
/// @brief the optional register that contains the values for each group
|
|
/// if no values should be returned, then this has a value of 0
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
|
|
RegisterId _groupRegister;
|
|
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
/// @brief list of variables names for the registers
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
|
|
std::vector<std::string> _variableNames;
|
|
|
|
};
|
|
|
|
// -----------------------------------------------------------------------------
|
|
// --SECTION-- SortBlock
|
|
// -----------------------------------------------------------------------------
|
|
|
|
class SortBlock : public ExecutionBlock {
|
|
|
|
public:
|
|
|
|
SortBlock (AQL_TRANSACTION_V8* trx,
|
|
ExecutionNode const* ep)
|
|
: ExecutionBlock(trx, ep),
|
|
_stable(false) {
|
|
}
|
|
|
|
virtual ~SortBlock () {};
|
|
|
|
int initialize ();
|
|
|
|
virtual int initCursor (AqlItemBlock* items, size_t pos);
|
|
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
/// @brief dosorting
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
|
|
private:
|
|
|
|
void doSorting ();
|
|
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
/// @brief OurLessThan
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
|
|
class OurLessThan {
|
|
public:
|
|
OurLessThan (AQL_TRANSACTION_V8* trx,
|
|
std::deque<AqlItemBlock*>& buffer,
|
|
std::vector<std::pair<RegisterId, bool>>& sortRegisters,
|
|
std::vector<TRI_document_collection_t const*>& colls)
|
|
: _trx(trx),
|
|
_buffer(buffer),
|
|
_sortRegisters(sortRegisters),
|
|
_colls(colls) {
|
|
}
|
|
|
|
bool operator() (std::pair<size_t, size_t> const& a,
|
|
std::pair<size_t, size_t> const& b);
|
|
|
|
private:
|
|
AQL_TRANSACTION_V8* _trx;
|
|
std::deque<AqlItemBlock*>& _buffer;
|
|
std::vector<std::pair<RegisterId, bool>>& _sortRegisters;
|
|
std::vector<TRI_document_collection_t const*>& _colls;
|
|
};
|
|
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
/// @brief pairs, consisting of variable and sort direction
|
|
/// (true = ascending | false = descending)
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
|
|
std::vector<std::pair<RegisterId, bool>> _sortRegisters;
|
|
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
/// @brief whether or not the sort should be stable
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
|
|
bool _stable;
|
|
|
|
};
|
|
|
|
// -----------------------------------------------------------------------------
|
|
// --SECTION-- LimitBlock
|
|
// -----------------------------------------------------------------------------
|
|
|
|
class LimitBlock : public ExecutionBlock {
|
|
|
|
public:
|
|
|
|
LimitBlock (AQL_TRANSACTION_V8* trx, LimitNode const* ep)
|
|
: ExecutionBlock(trx, ep), _offset(ep->_offset), _limit(ep->_limit),
|
|
_state(0) { // start in the beginning
|
|
}
|
|
|
|
~LimitBlock () {
|
|
}
|
|
|
|
int initialize ();
|
|
|
|
int initCursor (AqlItemBlock* items, size_t pos);
|
|
|
|
virtual int getOrSkipSome (size_t atLeast,
|
|
size_t atMost,
|
|
bool skipping,
|
|
AqlItemBlock*& result,
|
|
size_t& skipped);
|
|
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
/// @brief _offset
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
|
|
size_t _offset;
|
|
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
/// @brief _limit
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
|
|
size_t _limit;
|
|
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
/// @brief _count, number of items already handed on
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
|
|
size_t _count;
|
|
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
/// @brief _state, 0 is beginning, 1 is after offset, 2 is done
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
|
|
int _state;
|
|
};
|
|
|
|
// -----------------------------------------------------------------------------
|
|
// --SECTION-- ReturnBlock
|
|
// -----------------------------------------------------------------------------
|
|
|
|
class ReturnBlock : public ExecutionBlock {
|
|
|
|
public:
|
|
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
/// @brief constructor
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
|
|
ReturnBlock (AQL_TRANSACTION_V8* trx, ReturnNode const* ep)
|
|
: ExecutionBlock(trx, ep) {
|
|
|
|
}
|
|
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
/// @brief destructor
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
|
|
~ReturnBlock () {
|
|
}
|
|
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
/// @brief getSome
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
|
|
virtual AqlItemBlock* getSome (size_t atLeast,
|
|
size_t atMost);
|
|
|
|
};
|
|
|
|
// -----------------------------------------------------------------------------
|
|
// --SECTION-- ModificationBlock
|
|
// -----------------------------------------------------------------------------
|
|
|
|
class ModificationBlock : public ExecutionBlock {
|
|
|
|
public:
|
|
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
/// @brief constructor
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
|
|
ModificationBlock (AQL_TRANSACTION_V8*, ModificationNode const*);
|
|
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
/// @brief destructor
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
|
|
virtual ~ModificationBlock ();
|
|
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
/// @brief getSome
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
|
|
virtual AqlItemBlock* getSome (size_t atLeast,
|
|
size_t atMost);
|
|
|
|
// -----------------------------------------------------------------------------
|
|
// --SECTION-- protected methods
|
|
// -----------------------------------------------------------------------------
|
|
|
|
protected:
|
|
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
/// @brief the actual work horse
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
|
|
virtual void work (std::vector<AqlItemBlock*>&) = 0;
|
|
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
/// @brief resolve a collection name and return cid and document key
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
|
|
int resolve (char const*,
|
|
TRI_voc_cid_t&,
|
|
std::string&) const;
|
|
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
/// @brief extract a key from the AqlValue passed
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
|
|
int extractKey (AqlValue const&,
|
|
TRI_document_collection_t const*,
|
|
std::string&) const;
|
|
|
|
// -----------------------------------------------------------------------------
|
|
// --SECTION-- protected variables
|
|
// -----------------------------------------------------------------------------
|
|
|
|
protected:
|
|
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
/// @brief collection
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
|
|
Collection* _collection;
|
|
|
|
};
|
|
|
|
|
|
// -----------------------------------------------------------------------------
|
|
// --SECTION-- RemoveBlock
|
|
// -----------------------------------------------------------------------------
|
|
|
|
class RemoveBlock : public ModificationBlock {
|
|
|
|
public:
|
|
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
/// @brief constructor
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
|
|
RemoveBlock (AQL_TRANSACTION_V8* trx, RemoveNode const* ep);
|
|
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
/// @brief destructor
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
|
|
~RemoveBlock ();
|
|
|
|
// -----------------------------------------------------------------------------
|
|
// --SECTION-- protected methods
|
|
// -----------------------------------------------------------------------------
|
|
|
|
protected:
|
|
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
/// @brief the actual work horse for removing data
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
|
|
void work (std::vector<AqlItemBlock*>&);
|
|
|
|
};
|
|
|
|
// -----------------------------------------------------------------------------
|
|
// --SECTION-- InsertBlock
|
|
// -----------------------------------------------------------------------------
|
|
|
|
class InsertBlock : public ModificationBlock {
|
|
|
|
public:
|
|
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
/// @brief constructor
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
|
|
InsertBlock (AQL_TRANSACTION_V8* trx, InsertNode const* ep);
|
|
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
/// @brief destructor
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
|
|
~InsertBlock ();
|
|
|
|
// -----------------------------------------------------------------------------
|
|
// --SECTION-- protected methods
|
|
// -----------------------------------------------------------------------------
|
|
|
|
protected:
|
|
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
/// @brief the actual work horse for inserting data
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
|
|
void work (std::vector<AqlItemBlock*>&);
|
|
|
|
};
|
|
|
|
// -----------------------------------------------------------------------------
|
|
// --SECTION-- UpdateBlock
|
|
// -----------------------------------------------------------------------------
|
|
|
|
class UpdateBlock : public ModificationBlock {
|
|
|
|
public:
|
|
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
/// @brief constructor
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
|
|
UpdateBlock (AQL_TRANSACTION_V8* trx, UpdateNode const* ep);
|
|
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
/// @brief destructor
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
|
|
~UpdateBlock ();
|
|
|
|
// -----------------------------------------------------------------------------
|
|
// --SECTION-- protected methods
|
|
// -----------------------------------------------------------------------------
|
|
|
|
protected:
|
|
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
/// @brief the actual work horse for updating data
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
|
|
void work (std::vector<AqlItemBlock*>&);
|
|
|
|
};
|
|
|
|
// -----------------------------------------------------------------------------
|
|
// --SECTION-- ReplaceBlock
|
|
// -----------------------------------------------------------------------------
|
|
|
|
class ReplaceBlock : public ModificationBlock {
|
|
|
|
public:
|
|
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
/// @brief constructor
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
|
|
ReplaceBlock (AQL_TRANSACTION_V8* trx, ReplaceNode const* ep);
|
|
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
/// @brief destructor
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
|
|
~ReplaceBlock ();
|
|
|
|
// -----------------------------------------------------------------------------
|
|
// --SECTION-- protected methods
|
|
// -----------------------------------------------------------------------------
|
|
|
|
protected:
|
|
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
/// @brief the actual work horse for replacing data
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
|
|
void work (std::vector<AqlItemBlock*>&);
|
|
|
|
};
|
|
|
|
// -----------------------------------------------------------------------------
|
|
// --SECTION-- NoResultsBlock
|
|
// -----------------------------------------------------------------------------
|
|
|
|
class NoResultsBlock : public ExecutionBlock {
|
|
|
|
public:
|
|
|
|
NoResultsBlock (AQL_TRANSACTION_V8* trx, SingletonNode const* ep)
|
|
: ExecutionBlock(trx, ep) {
|
|
}
|
|
|
|
~NoResultsBlock () {
|
|
}
|
|
|
|
int initialize () {
|
|
return ExecutionBlock::initialize();
|
|
}
|
|
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
/// @brief initCursor, store a copy of the register values coming from above
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
|
|
int initCursor (AqlItemBlock* items, size_t pos);
|
|
|
|
bool hasMore () {
|
|
return false;
|
|
}
|
|
|
|
int64_t count () {
|
|
return 0;
|
|
}
|
|
|
|
int64_t remaining () {
|
|
return 0;
|
|
}
|
|
|
|
private:
|
|
|
|
int getOrSkipSome (size_t atLeast,
|
|
size_t atMost,
|
|
bool skipping,
|
|
AqlItemBlock*& result,
|
|
size_t& skipped);
|
|
|
|
};
|
|
|
|
} // namespace triagens::aql
|
|
} // namespace triagens
|
|
|
|
#endif
|
|
|
|
// Local Variables:
|
|
// mode: outline-minor
|
|
// outline-regexp: "^\\(/// @brief\\|/// {@inheritDoc}\\|/// @addtogroup\\|// --SECTION--\\|/// @\\}\\)"
|
|
// End:
|