mirror of https://gitee.com/bigwinds/arangodb
110 lines
3.7 KiB
C++
110 lines
3.7 KiB
C++
////////////////////////////////////////////////////////////////////////////////
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/// @brief Aql, execution engine
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///
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/// @file
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///
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/// DISCLAIMER
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///
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/// Copyright 2014 ArangoDB GmbH, Cologne, Germany
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/// Copyright 2004-2014 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 ArangoDB GmbH, Cologne, Germany
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///
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/// @author Jan Steemann
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/// @author Copyright 2014, ArangoDB GmbH, Cologne, Germany
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/// @author Copyright 2012-2013, triAGENS GmbH, Cologne, Germany
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////////////////////////////////////////////////////////////////////////////////
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#include "Aql/ExecutionEngine.h"
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#include "Aql/ExecutionBlock.h"
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#include "Aql/ExecutionPlan.h"
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#include "Utils/Exception.h"
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using namespace triagens::aql;
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// -----------------------------------------------------------------------------
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// --SECTION-- constructors / destructors
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// -----------------------------------------------------------------------------
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////////////////////////////////////////////////////////////////////////////////
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/// @brief create the engine
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////////////////////////////////////////////////////////////////////////////////
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ExecutionEngine::ExecutionEngine ()
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: _blocks(),
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_root(nullptr) {
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_blocks.reserve(8);
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}
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////////////////////////////////////////////////////////////////////////////////
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/// @brief destroy the engine, frees all assigned blocks
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////////////////////////////////////////////////////////////////////////////////
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ExecutionEngine::~ExecutionEngine () {
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if (_root != nullptr) {
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_root->shutdown();
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}
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for (auto it = _blocks.begin(); it != _blocks.end(); ++it) {
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delete (*it);
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}
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}
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// -----------------------------------------------------------------------------
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// --SECTION-- public functions
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// -----------------------------------------------------------------------------
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////////////////////////////////////////////////////////////////////////////////
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/// @brief create an execution engine from a plan
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////////////////////////////////////////////////////////////////////////////////
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ExecutionEngine* ExecutionEngine::instanciateFromPlan (ExecutionPlan const* plan) {
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auto engine = new ExecutionEngine();
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try {
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auto root = ExecutionBlock::instanciatePlan(plan); //engine, plan);
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root->staticAnalysis();
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root->initialize();
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engine->_root = root;
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}
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catch (...) {
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delete engine;
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throw;
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}
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return engine;
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}
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////////////////////////////////////////////////////////////////////////////////
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/// @brief add a block to the engine
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////////////////////////////////////////////////////////////////////////////////
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void ExecutionEngine::addBlock (ExecutionBlock* block) {
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TRI_ASSERT(block != nullptr);
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_blocks.push_back(block);
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}
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// -----------------------------------------------------------------------------
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// --SECTION-- END-OF-FILE
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// -----------------------------------------------------------------------------
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// Local Variables:
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// mode: outline-minor
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// outline-regexp: "/// @brief\\|/// {@inheritDoc}\\|/// @page\\|// --SECTION--\\|/// @\\}"
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// End:
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