mirror of https://gitee.com/bigwinds/arangodb
76 lines
2.4 KiB
C++
76 lines
2.4 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.cpp
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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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#include "Aql/ExecutionBlock.h"
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#include "Utils/Exception.h"
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using namespace triagens::basics;
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using namespace triagens::arango;
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using namespace triagens::aql;
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ExecutionBlock::~ExecutionBlock () {
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}
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int ExecutionBlock::bind (std::map<std::string, struct TRI_json_s*>* params) {
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return TRI_ERROR_NO_ERROR;
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}
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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 ExecutionBlock::walk (WalkerWorker* worker) {
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// Only do every node exactly once:
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if (worker->done(this)) {
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return;
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}
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worker->before(this);
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// Now the children in their natural order:
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for (auto it = _dependencies.begin();
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it != _dependencies.end();
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++it) {
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(*it)->walk(worker);
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}
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// Now handle a subquery:
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if (_exeNode->getType() == ExecutionNode::SUBQUERY) {
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// auto p = static_cast<SubqueryBlock*>(this);
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if (worker->enterSubquery(this, nullptr)) { ; // p->_subquery
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// p->_subquery->walk(worker);
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worker->leaveSubquery(this, nullptr); // p->_subquery
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}
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}
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worker->after(this);
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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}\\|/// @addtogroup\\|// --SECTION--\\|/// @\\}\\)"
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// End:
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