mirror of https://gitee.com/bigwinds/arangodb
75 lines
2.2 KiB
C++
75 lines
2.2 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 Max Neunhoeffer
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////////////////////////////////////////////////////////////////////////////////
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#ifndef ARANGOD_AQL_ENUMERATE_LIST_BLOCK_H
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#define ARANGOD_AQL_ENUMERATE_LIST_BLOCK_H 1
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#include "Aql/ExecutionNode.h"
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#include "ExecutionBlock.h"
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namespace arangodb {
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namespace aql {
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class AqlItemBlock;
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class ExecutionEngine;
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class EnumerateListBlock final : public ExecutionBlock {
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public:
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EnumerateListBlock(ExecutionEngine*, EnumerateListNode const*);
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~EnumerateListBlock();
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std::pair<ExecutionState, Result> initializeCursor(AqlItemBlock* items, size_t pos) override;
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std::pair<ExecutionState, std::unique_ptr<AqlItemBlock>> getSome(size_t atMost) override final;
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// skip atMost documents, returns the number actually skipped . . .
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std::pair<ExecutionState, size_t> skipSome(size_t atMost) override final;
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private:
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// cppcheck-suppress *
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AqlValue getAqlValue(AqlValue const& inVarReg, size_t n, bool& mustDestroy);
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// cppcheck-suppress *
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void throwArrayExpectedException(AqlValue const& value);
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private:
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// current position in the _inVariable
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size_t _index;
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// total number of elements in DOCVEC
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size_t _docVecSize;
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// the register index containing the inVariable of the
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// EnumerateListNode
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RegisterId _inVarRegId;
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// @brief number of requests in flight in the moment we hit WAITING
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size_t _inflight;
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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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