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arangodb/arangod/Aql/ExecutionEngine.cpp

110 lines
3.7 KiB
C++

////////////////////////////////////////////////////////////////////////////////
/// @brief Aql, execution engine
///
/// @file
///
/// DISCLAIMER
///
/// Copyright 2014 ArangoDB GmbH, Cologne, Germany
/// Copyright 2004-2014 triAGENS GmbH, Cologne, Germany
///
/// Licensed under the Apache License, Version 2.0 (the "License");
/// you may not use this file except in compliance with the License.
/// You may obtain a copy of the License at
///
/// http://www.apache.org/licenses/LICENSE-2.0
///
/// Unless required by applicable law or agreed to in writing, software
/// distributed under the License is distributed on an "AS IS" BASIS,
/// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
/// See the License for the specific language governing permissions and
/// limitations under the License.
///
/// Copyright holder is ArangoDB GmbH, Cologne, Germany
///
/// @author Jan Steemann
/// @author Copyright 2014, ArangoDB GmbH, Cologne, Germany
/// @author Copyright 2012-2013, triAGENS GmbH, Cologne, Germany
////////////////////////////////////////////////////////////////////////////////
#include "Aql/ExecutionEngine.h"
#include "Aql/ExecutionBlock.h"
#include "Aql/ExecutionPlan.h"
#include "Utils/Exception.h"
using namespace triagens::aql;
// -----------------------------------------------------------------------------
// --SECTION-- constructors / destructors
// -----------------------------------------------------------------------------
////////////////////////////////////////////////////////////////////////////////
/// @brief create the engine
////////////////////////////////////////////////////////////////////////////////
ExecutionEngine::ExecutionEngine ()
: _blocks(),
_root(nullptr) {
_blocks.reserve(8);
}
////////////////////////////////////////////////////////////////////////////////
/// @brief destroy the engine, frees all assigned blocks
////////////////////////////////////////////////////////////////////////////////
ExecutionEngine::~ExecutionEngine () {
if (_root != nullptr) {
_root->shutdown();
}
for (auto it = _blocks.begin(); it != _blocks.end(); ++it) {
delete (*it);
}
}
// -----------------------------------------------------------------------------
// --SECTION-- public functions
// -----------------------------------------------------------------------------
////////////////////////////////////////////////////////////////////////////////
/// @brief create an execution engine from a plan
////////////////////////////////////////////////////////////////////////////////
ExecutionEngine* ExecutionEngine::instanciateFromPlan (ExecutionPlan const* plan) {
auto engine = new ExecutionEngine();
try {
auto root = ExecutionBlock::instanciatePlan(plan); //engine, plan);
root->staticAnalysis();
root->initialize();
engine->_root = root;
}
catch (...) {
delete engine;
throw;
}
return engine;
}
////////////////////////////////////////////////////////////////////////////////
/// @brief add a block to the engine
////////////////////////////////////////////////////////////////////////////////
void ExecutionEngine::addBlock (ExecutionBlock* block) {
TRI_ASSERT(block != nullptr);
_blocks.push_back(block);
}
// -----------------------------------------------------------------------------
// --SECTION-- END-OF-FILE
// -----------------------------------------------------------------------------
// Local Variables:
// mode: outline-minor
// outline-regexp: "/// @brief\\|/// {@inheritDoc}\\|/// @page\\|// --SECTION--\\|/// @\\}"
// End: