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/**
* Copyright (C) 2020-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/query/plan_ranker.h"
#include "mongo/db/query/sbe_stage_builder.h"
namespace mongo::sbe::plan_ranker {
/**
* Structure with data needed to execute the multi-planning trial period for a single SBE candidate
* plan.
*/
struct CandidatePlanData {
stage_builder::PlanStageData stageData;
std::unique_ptr<TrialRunTracker> tracker;
value::SlotAccessor* resultAccessor = nullptr;
value::SlotAccessor* recordIdAccessor = nullptr;
bool open = false;
};
using CandidatePlan =
mongo::plan_ranker::BaseCandidatePlan<std::unique_ptr<mongo::sbe::PlanStage>,
std::pair<BSONObj, boost::optional<RecordId>>,
CandidatePlanData>;
/**
* A factory function to create a plan ranker for an SBE plan stage stats tree.
*/
std::unique_ptr<mongo::plan_ranker::PlanScorer<PlanStageStats>> makePlanScorer(
const QuerySolution* solution);
/**
* Helper to calculate productivity if you already know the advances and reads.
*/
double calculateProductivity(size_t advances, size_t numReads);
} // namespace mongo::sbe::plan_ranker
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