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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/exec/sbe/expressions/expression.h"
#include "mongo/db/exec/sbe/stages/stages.h"
#include "mongo/db/exec/sbe/values/value.h"
#include "mongo/db/operation_context.h"
#include "mongo/db/query/projection.h"
namespace mongo::stage_builder {
/**
* Generates an SBE plan stage sub-tree implementing a query projection. The 'stage' parameter
* defines an input stage to the generated SBE plan stage sub-tree. The 'inputVar' defines a
* variable to read the input document from.
*/
std::pair<sbe::value::SlotId, std::unique_ptr<sbe::PlanStage>> generateProjection(
OperationContext* opCtx,
const projection_ast::Projection* proj,
std::unique_ptr<sbe::PlanStage> stage,
sbe::value::SlotIdGenerator* slotIdGenerator,
sbe::value::FrameIdGenerator* frameIdGenerator,
sbe::value::SlotId inputVar,
sbe::RuntimeEnvironment* env,
PlanNodeId planNodeId);
} // namespace mongo::stage_builder
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