mirror of https://gitee.com/bigwinds/arangodb
64 lines
1.9 KiB
C++
64 lines
1.9 KiB
C++
////////////////////////////////////////////////////////////////////////////////
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/// DISCLAIMER
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///
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/// Copyright 2014-2016 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 Michael Hackstein
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////////////////////////////////////////////////////////////////////////////////
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#ifndef ARANGOD_AQL_FIXED_VAR_EXPRESSION_CONTEXT_H
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#define ARANGOD_AQL_FIXED_VAR_EXPRESSION_CONTEXT_H 1
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#include "Aql/AqlValue.h"
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#include "Aql/QueryExpressionContext.h"
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#include <unordered_map>
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namespace arangodb {
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namespace velocypack {
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class Builder;
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}
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namespace aql {
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class AqlItemBlock;
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class FixedVarExpressionContext final : public QueryExpressionContext {
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public:
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explicit FixedVarExpressionContext(Query* query);
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~FixedVarExpressionContext() override = default;
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size_t numRegisters() const override;
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AqlValue getVariableValue(Variable const* variable, bool doCopy,
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bool& mustDestroy) const override;
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void clearVariableValues();
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void setVariableValue(Variable const*, AqlValue const&);
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void serializeAllVariables(transaction::Methods*, arangodb::velocypack::Builder&) const;
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private:
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/// @brief temporary storage for expression data context
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std::unordered_map<Variable const*, AqlValue> _vars;
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};
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} // namespace aql
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} // namespace arangodb
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#endif
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