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/**
* Copyright (C) 2023-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/query_shape/agg_cmd_shape.h"
#include "mongo/db/query/query_shape/shape_helpers.h"
namespace mongo::query_shape {
AggCmdShapeComponents::AggCmdShapeComponents(
const AggregateCommandRequest& aggRequest,
stdx::unordered_set<NamespaceString> involvedNamespaces_,
std::vector<BSONObj> pipeline)
: allowDiskUse(aggRequest.getAllowDiskUse()),
involvedNamespaces(std::move(involvedNamespaces_)),
representativePipeline(std::move(pipeline)) {}
AggCmdShapeComponents::AggCmdShapeComponents(
OptionalBool allowDiskUse,
stdx::unordered_set<NamespaceString> involvedNamespaces_,
std::vector<BSONObj> pipeline)
: allowDiskUse(allowDiskUse),
involvedNamespaces(std::move(involvedNamespaces_)),
representativePipeline(std::move(pipeline)) {}
void AggCmdShapeComponents::HashValue(absl::HashState state) const {
state = absl::HashState::combine(std::move(state), allowDiskUse);
for (auto&& shapifiedStage : representativePipeline) {
state = absl::HashState::combine(std::move(state), simpleHash(shapifiedStage));
}
}
void AggCmdShape::appendLetCmdSpecificShapeComponents(
BSONObjBuilder& bob,
const boost::intrusive_ptr<ExpressionContext>& expCtx,
const SerializationOptions& opts) const {
tassert(7633000,
"We don't support serializing to the unmodified shape here, since we have already "
"shapified and stored the representative query - we've lost the original literals",
opts.literalPolicy != LiteralSerializationPolicy::kUnchanged);
if (opts == SerializationOptions::kRepresentativeQueryShapeSerializeOptions) {
// We have this copy stored already!
return _components.appendTo(bob);
} else {
// The cached pipeline shape doesn't match the requested options, so we have to
// re-parse the pipeline from the initial request.
expCtx->inMongos = _inMongos;
expCtx->addResolvedNamespaces(_components.involvedNamespaces);
auto reparsed = Pipeline::parse(_components.representativePipeline, expCtx);
auto serializedPipeline = reparsed->serializeToBson(opts);
AggCmdShapeComponents{
_components.allowDiskUse, _components.involvedNamespaces, serializedPipeline}
.appendTo(bob);
}
}
void AggCmdShapeComponents::appendTo(BSONObjBuilder& bob) const {
bob.append("command", "aggregate");
// pipeline
bob.append(AggregateCommandRequest::kPipelineFieldName, representativePipeline);
// allowDiskUse
if (allowDiskUse.has_value()) {
bob.append(AggregateCommandRequest::kAllowDiskUseFieldName, bool(allowDiskUse));
}
}
// As part of the size, we must track the allocation of elements in the representative
// pipeline, as well as the elements in the unordered set of involved namespaces.
size_t AggCmdShapeComponents::size() const {
return sizeof(AggCmdShapeComponents) + shape_helpers::containerSize(representativePipeline) +
shape_helpers::containerSize(involvedNamespaces);
}
AggCmdShape::AggCmdShape(const AggregateCommandRequest& aggregateCommand,
NamespaceString origNss,
stdx::unordered_set<NamespaceString> involvedNamespaces_,
const Pipeline& pipeline,
const boost::intrusive_ptr<ExpressionContext>& expCtx)
: CmdWithLetShape(aggregateCommand.getLet(),
expCtx,
_components,
std::move(origNss),
aggregateCommand.getCollation().value_or(BSONObj())),
_components(aggregateCommand,
std::move(involvedNamespaces_),
pipeline.serializeToBson(
SerializationOptions::kRepresentativeQueryShapeSerializeOptions)),
_inMongos(expCtx->inMongos) {}
size_t AggCmdShape::extraSize() const {
// To account for possible padding, we calculate the extra space with the difference instead of
// using sizeof(bool);
return sizeof(AggCmdShape) - sizeof(CmdWithLetShape) - sizeof(AggCmdShapeComponents);
}
} // namespace mongo::query_shape
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