mirror of https://gitee.com/bigwinds/arangodb
92 lines
3.4 KiB
C++
92 lines
3.4 KiB
C++
////////////////////////////////////////////////////////////////////////////////
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/// DISCLAIMER
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///
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/// Copyright 2018 ArangoDB 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 Andrey Abramov
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/// @author Vasiliy Nabatchikov
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////////////////////////////////////////////////////////////////////////////////
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#ifndef ARANGOD_IRESEARCH__IRESEARCH_EXPRESSION_CONTEXT_H
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#define ARANGOD_IRESEARCH__IRESEARCH_EXPRESSION_CONTEXT_H 1
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#include "Aql/ExecutionNode.h"
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#include "Aql/InputAqlItemRow.h"
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#include "Aql/QueryExpressionContext.h"
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#include "Aql/RegisterPlan.h"
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#include "Basics/Exceptions.h"
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namespace arangodb {
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namespace aql {
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class AqlItemBlock;
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struct AstNode;
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class ExecutionEngine;
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} // namespace aql
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namespace iresearch {
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class IResearchViewNode;
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///////////////////////////////////////////////////////////////////////////////
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/// @struct ViewExpressionContextBase
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/// @brief FIXME remove this struct once IResearchView will be able to evaluate
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/// epxressions with loop variable in SEARCH expressions
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///////////////////////////////////////////////////////////////////////////////
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struct ViewExpressionContextBase : public aql::QueryExpressionContext {
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explicit ViewExpressionContextBase(arangodb::aql::Query* query)
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: aql::QueryExpressionContext(query) {}
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aql::AstNode const* _expr{}; // for troubleshooting
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}; // ViewExpressionContextBase
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///////////////////////////////////////////////////////////////////////////////
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/// @struct ViewExpressionContext
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///////////////////////////////////////////////////////////////////////////////
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struct ViewExpressionContext final : public ViewExpressionContextBase {
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using VarInfoMap = std::unordered_map<aql::VariableId, aql::VarInfo>;
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ViewExpressionContext(aql::Query* query, aql::RegisterId numRegs,
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aql::Variable const& outVar,
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VarInfoMap const& varInfoMap, int nodeDepth)
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: ViewExpressionContextBase(query),
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_numRegs(numRegs),
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_outVar(outVar),
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_varInfoMap(varInfoMap),
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_nodeDepth(nodeDepth) {}
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virtual size_t numRegisters() const override;
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virtual aql::AqlValue getVariableValue(aql::Variable const* variable, bool doCopy,
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bool& mustDestroy) const override;
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inline aql::Variable const& outVariable() const noexcept { return _outVar; }
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inline VarInfoMap const& varInfoMap() const noexcept { return _varInfoMap; }
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inline int nodeDepth() const noexcept { return _nodeDepth; }
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aql::InputAqlItemRow _inputRow{aql::CreateInvalidInputRowHint{}};
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aql::RegisterId const _numRegs;
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aql::Variable const& _outVar;
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VarInfoMap const& _varInfoMap;
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int const _nodeDepth;
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}; // ViewExpressionContext
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} // namespace iresearch
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} // namespace arangodb
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#endif // ARANGOD_IRESEARCH__IRESEARCH_EXPRESSION_CONTEXT_H 1
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