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/**
* Copyright (C) 2019-present MongoDB, Inc.
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the Server Side Public License, version 1,
* as published by MongoDB, Inc.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* Server Side Public License for more details.
*
* You should have received a copy of the Server Side Public License
* along with this program. If not, see
* <http://www.mongodb.com/licensing/server-side-public-license>.
*
* As a special exception, the copyright holders give permission to link the
* code of portions of this program with the OpenSSL library under certain
* conditions as described in each individual source file and distribute
* linked combinations including the program with the OpenSSL library. You
* must comply with the Server Side Public License in all respects for
* all of the code used other than as permitted herein. If you modify file(s)
* with this exception, you may extend this exception to your version of the
* file(s), but you are not obligated to do so. If you do not wish to do so,
* delete this exception statement from your version. If you delete this
* exception statement from all source files in the program, then also delete
* it in the license file.
*/
#pragma once
#include "mongo/db/exec/sbe/stages/stages.h"
#include "mongo/db/exec/trial_run_progress_tracker.h"
namespace mongo::sbe {
class SortStage final : public PlanStage {
public:
SortStage(std::unique_ptr<PlanStage> input,
value::SlotVector obs,
std::vector<value::SortDirection> dirs,
value::SlotVector vals,
size_t limit,
TrialRunProgressTracker* tracker);
std::unique_ptr<PlanStage> clone() const final;
void prepare(CompileCtx& ctx) final;
value::SlotAccessor* getAccessor(CompileCtx& ctx, value::SlotId slot) final;
void open(bool reOpen) final;
PlanState getNext() final;
void close() final;
std::unique_ptr<PlanStageStats> getStats() const final;
const SpecificStats* getSpecificStats() const final;
std::vector<DebugPrinter::Block> debugPrint() const final;
private:
using TableType = std::
multimap<value::MaterializedRow, value::MaterializedRow, value::MaterializedRowComparator>;
using SortKeyAccessor = value::MaterializedRowKeyAccessor<TableType::iterator>;
using SortValueAccessor = value::MaterializedRowValueAccessor<TableType::iterator>;
const value::SlotVector _obs;
const std::vector<value::SortDirection> _dirs;
const value::SlotVector _vals;
const size_t _limit;
std::vector<value::SlotAccessor*> _inKeyAccessors;
std::vector<value::SlotAccessor*> _inValueAccessors;
value::SlotMap<std::unique_ptr<value::SlotAccessor>> _outAccessors;
TableType _st;
TableType::iterator _stIt;
// If provided, used during a trial run to accumulate certain execution stats. Once the trial
// run is complete, this pointer is reset to nullptr.
TrialRunProgressTracker* _tracker{nullptr};
};
} // namespace mongo::sbe
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