mirror of https://gitee.com/bigwinds/arangodb
88 lines
3.1 KiB
C++
88 lines
3.1 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 Jan Christoph Uhde
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////////////////////////////////////////////////////////////////////////////////
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#include "IdExecutor.h"
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#include "Aql/AqlValue.h"
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#include "Aql/ConstFetcher.h"
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#include "Aql/OutputAqlItemRow.h"
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#include "Aql/SingleRowFetcher.h"
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#include "Basics/Common.h"
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#include <algorithm>
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using namespace arangodb;
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using namespace arangodb::aql;
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IdExecutorInfos::IdExecutorInfos(RegisterId nrInOutRegisters,
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// cppcheck-suppress passedByValue
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std::unordered_set<RegisterId> registersToKeep,
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// cppcheck-suppress passedByValue
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std::unordered_set<RegisterId> registersToClear)
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: ExecutorInfos(make_shared_unordered_set(), make_shared_unordered_set(),
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nrInOutRegisters, nrInOutRegisters,
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std::move(registersToClear), std::move(registersToKeep)) {}
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template <class UsedFetcher>
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IdExecutor<UsedFetcher>::IdExecutor(Fetcher& fetcher, IdExecutorInfos& infos)
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: _fetcher(fetcher){};
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template <class UsedFetcher>
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IdExecutor<UsedFetcher>::~IdExecutor() = default;
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template <class UsedFetcher>
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std::pair<ExecutionState, NoStats> IdExecutor<UsedFetcher>::produceRows(OutputAqlItemRow& output) {
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ExecutionState state;
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NoStats stats;
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InputAqlItemRow inputRow = InputAqlItemRow{CreateInvalidInputRowHint{}};
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std::tie(state, inputRow) = _fetcher.fetchRow();
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if (state == ExecutionState::WAITING) {
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TRI_ASSERT(!inputRow);
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return {state, std::move(stats)};
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}
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if (!inputRow) {
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TRI_ASSERT(state == ExecutionState::DONE);
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return {state, std::move(stats)};
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}
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TRI_IF_FAILURE("SingletonBlock::getOrSkipSome") {
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THROW_ARANGO_EXCEPTION(TRI_ERROR_DEBUG);
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}
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TRI_ASSERT(state == ExecutionState::HASMORE || state == ExecutionState::DONE);
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/*Second parameter are to ignore registers that should be kept but are missing in the input row*/
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output.copyRow(inputRow, std::is_same<UsedFetcher, ConstFetcher>::value);
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TRI_ASSERT(output.produced());
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TRI_IF_FAILURE("SingletonBlock::getOrSkipSomeSet") {
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THROW_ARANGO_EXCEPTION(TRI_ERROR_DEBUG);
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}
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return {state, std::move(stats)};
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}
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template class ::arangodb::aql::IdExecutor<ConstFetcher>;
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// ID can always pass through
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template class ::arangodb::aql::IdExecutor<SingleRowFetcher<true>>;
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