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/**
* Copyright (C) 2022-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.
*/
#include "mongo/db/query/sbe_stage_builder_eval_frame.h"
#include "mongo/db/query/optimizer/node.h"
#include "mongo/db/query/optimizer/syntax/syntax.h"
#include "mongo/db/query/sbe_stage_builder.h"
#include "mongo/db/query/sbe_stage_builder_abt_helpers.h"
#include "mongo/db/query/sbe_stage_builder_abt_holder_impl.h"
namespace mongo::stage_builder {
EvalExpr::EvalExpr(const abt::HolderPtr& a) : _storage(abt::wrap(a->_value)) {}
std::unique_ptr<sbe::EExpression> EvalExpr::extractExpr(optimizer::SlotVarMap& varMap,
const sbe::RuntimeEnvironment& runtimeEnv) {
if (hasSlot()) {
return sbe::makeE<sbe::EVariable>(stdx::get<sbe::value::SlotId>(_storage));
}
if (hasABT()) {
return abtToExpr(stdx::get<abt::HolderPtr>(_storage)->_value, varMap, runtimeEnv);
}
if (stdx::holds_alternative<bool>(_storage)) {
return std::unique_ptr<sbe::EExpression>{};
}
return std::move(stdx::get<std::unique_ptr<sbe::EExpression>>(_storage));
}
std::unique_ptr<sbe::EExpression> EvalExpr::extractExpr(StageBuilderState& state) {
return extractExpr(state.slotVarMap, *state.data->env);
}
abt::HolderPtr EvalExpr::extractABT(optimizer::SlotVarMap& varMap) {
if (hasSlot()) {
auto slotId = stdx::get<sbe::value::SlotId>(_storage);
auto varName = makeVariableName(slotId);
varMap.emplace(varName, slotId);
return abt::wrap(optimizer::make<optimizer::Variable>(varName));
}
tassert(6950800,
"Unexpected: extractABT() method invoked on an EExpression object",
stdx::holds_alternative<abt::HolderPtr>(_storage));
return std::move(stdx::get<abt::HolderPtr>(_storage));
}
} // namespace mongo::stage_builder
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