mirror of https://gitee.com/bigwinds/arangodb
93 lines
2.9 KiB
C++
93 lines
2.9 KiB
C++
////////////////////////////////////////////////////////////////////////////////
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/// DISCLAIMER
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///
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/// Copyright 2014-2019 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 Markus Pfeiffer
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////////////////////////////////////////////////////////////////////////////////
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#include "Aql/Ast.h"
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#include "Aql/ExecutionBlockImpl.h"
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#include "Aql/ExecutionPlan.h"
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#include "Aql/NodeFinder.h"
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#include "Aql/IdExecutor.h"
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#include "Aql/Query.h"
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#include "Aql/SubqueryEndExecutionNode.h"
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#include <velocypack/Iterator.h>
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#include <velocypack/velocypack-aliases.h>
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namespace arangodb {
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namespace aql {
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SubqueryEndNode::SubqueryEndNode(ExecutionPlan* plan, arangodb::velocypack::Slice const& base)
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: ExecutionNode(plan, base),
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_outVariable(Variable::varFromVPack(plan->getAst(), base, "outVariable")) {}
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void SubqueryEndNode::toVelocyPackHelper(VPackBuilder& nodes, unsigned flags) const {
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ExecutionNode::toVelocyPackHelperGeneric(nodes, flags);
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nodes.add(VPackValue("outVariable"));
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_outVariable->toVelocyPack(nodes);
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nodes.close();
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}
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std::unique_ptr<ExecutionBlock> SubqueryEndNode::createBlock(
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ExecutionEngine& engine,
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std::unordered_map<ExecutionNode*, ExecutionBlock*> const& cache) const {
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TRI_ASSERT(false);
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return nullptr;
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}
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ExecutionNode* SubqueryEndNode::clone(ExecutionPlan* plan, bool withDependencies,
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bool withProperties) const {
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auto outVariable = _outVariable;
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if (withProperties) {
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outVariable = plan->getAst()->variables()->createVariable(outVariable);
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}
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auto c = std::make_unique<SubqueryEndNode>(plan, _id, outVariable);
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return cloneHelper(std::move(c), withDependencies, withProperties);
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}
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void SubqueryEndNode::replaceOutVariable(Variable const* var) {
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_outVariable = var;
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}
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CostEstimate SubqueryEndNode::estimateCost() const {
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TRI_ASSERT(_dependencies.size() == 1);
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CostEstimate estimate = _dependencies.at(0)->getCost();
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return estimate;
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}
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bool SubqueryEndNode::isEqualTo(SubqueryEndNode const& other) const
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{
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TRI_ASSERT(_outVariable != nullptr); TRI_ASSERT(other._outVariable != nullptr);
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return ExecutionNode::isEqualTo(other) &&
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_outVariable->isEqualTo(*(other._outVariable));
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}
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} // namespace aql
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} // namespace arangodb
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