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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_stats/agg_key.h"
#include "mongo/db/query/explain_options.h"
#include <absl/container/node_hash_set.h>
#include <boost/cstdint.hpp>
#include <functional>
#include <initializer_list>
#include <memory>
#include <numeric>
#include <vector>
#include <boost/move/utility_core.hpp>
#include <boost/optional/optional.hpp>
#include <boost/smart_ptr/intrusive_ptr.hpp>
#include "mongo/crypto/fle_field_schema_gen.h"
#include "mongo/db/pipeline/exchange_spec_gen.h"
#include "mongo/db/pipeline/pipeline.h"
#include "mongo/db/query/query_shape/agg_cmd_shape.h"
#include "mongo/db/query/query_shape/query_shape.h"
#include "mongo/db/query/query_shape/serialization_options.h"
#include "mongo/db/query/query_shape/shape_helpers.h"
#include "mongo/idl/basic_types_gen.h"
#include "mongo/util/assert_util.h"
namespace mongo::query_stats {
AggCmdComponents::AggCmdComponents(const AggregateCommandRequest& request_,
stdx::unordered_set<NamespaceString> involvedNamespaces_)
: involvedNamespaces(std::move(involvedNamespaces_)),
_bypassDocumentValidation(request_.getBypassDocumentValidation().value_or(false)),
_verbosity(request_.getExplain()),
_hasField() {
_hasField.batchSize = request_.getCursor().getBatchSize().has_value();
_hasField.bypassDocumentValidation = request_.getBypassDocumentValidation().has_value();
_hasField.explain = request_.getExplain().has_value();
_hasField.passthroughToShard = request_.getPassthroughToShard().has_value();
}
void AggCmdComponents::HashValue(absl::HashState state) const {
// The hashing for verbosity in this branch needed to be different because the compiler was
// complaining about the different wrappers. This is not important since this computation is
// only used locally in memory on a single machine, and the query shape is still stable.
auto verbosity =
_hasField.explain ? std::string(ExplainOptions::verbosityString(_verbosity.value())) : "";
state = absl::HashState::combine(std::move(state),
_bypassDocumentValidation,
_hasField.batchSize,
_hasField.bypassDocumentValidation,
verbosity,
_hasField.explain,
_hasField.passthroughToShard);
// We don't need to add 'involvedNamespaces' here since they are already tracked/duplicated in
// the Pipeline component of the query shape. We just expose them here for ease of
// analysis/querying.
}
void AggCmdComponents::appendTo(BSONObjBuilder& bob, const SerializationOptions& opts) const {
// otherNss
if (!involvedNamespaces.empty()) {
BSONArrayBuilder otherNss = bob.subarrayStart(kOtherNssFieldName);
for (const auto& nss : involvedNamespaces) {
BSONObjBuilder otherNsEntryBob = otherNss.subobjStart();
shape_helpers::appendNamespaceShape(otherNsEntryBob, nss, opts);
otherNsEntryBob.doneFast();
}
otherNss.doneFast();
}
// bypassDocumentValidation
if (_hasField.bypassDocumentValidation) {
bob.append(AggregateCommandRequest::kBypassDocumentValidationFieldName,
_bypassDocumentValidation);
}
// We don't store the specified batch size values since they don't matter.
// Provide an arbitrary literal long here.
tassert(78429,
"Serialization policy not supported - original values have been discarded",
opts.literalPolicy != LiteralSerializationPolicy::kUnchanged);
if (_hasField.batchSize) {
// cursor
BSONObjBuilder cursorInfo = bob.subobjStart(AggregateCommandRequest::kCursorFieldName);
opts.appendLiteral(&cursorInfo, SimpleCursorOptions::kBatchSizeFieldName, 0ll);
cursorInfo.doneFast();
}
if (_hasField.explain) {
// The verbosity can be explicitly set by using the .explain() command, but when using the
// flag {explain: true} it is set to 'queryPlanner'.
bob.append(AggregateCommandRequest::kExplainFieldName,
ExplainOptions::verbosityString(_verbosity.value()));
}
// The values here don't matter (assuming we're not using the 'kUnchanged' policy).
tassert(8949601,
"Serialization policy not supported - original values have been discarded",
opts.literalPolicy != LiteralSerializationPolicy::kUnchanged);
if (_hasField.passthroughToShard) {
BSONObjBuilder passthroughToShardInfo =
bob.subobjStart(AggregateCommandRequest::kPassthroughToShardFieldName);
static const PassthroughToShardOptions representativePassthroughOptions = []() {
PassthroughToShardOptions passthroughOpts;
// The value doesn't matter since we will only use this for shapified output.
passthroughOpts.setShard("?");
return passthroughOpts;
}();
representativePassthroughOptions.serialize(&passthroughToShardInfo, opts);
passthroughToShardInfo.doneFast();
}
}
size_t AggCmdComponents::size() const {
return sizeof(AggCmdComponents) +
std::accumulate(involvedNamespaces.begin(),
involvedNamespaces.end(),
0,
[](int64_t total, const auto& nss) { return total + nss.size(); });
}
void AggKey::appendCommandSpecificComponents(BSONObjBuilder& bob,
const SerializationOptions& opts) const {
return _components.appendTo(bob, opts);
}
AggKey::AggKey(AggregateCommandRequest request,
const Pipeline& pipeline,
const boost::intrusive_ptr<ExpressionContext>& expCtx,
stdx::unordered_set<NamespaceString> involvedNamespaces,
const NamespaceString& origNss,
query_shape::CollectionType collectionType)
: Key(expCtx->opCtx,
std::make_unique<query_shape::AggCmdShape>(
request, origNss, involvedNamespaces, pipeline, expCtx),
request.getHint(),
request.getReadConcern(),
request.getMaxTimeMS().has_value(),
collectionType),
_components(request, std::move(involvedNamespaces)) {}
} // namespace mongo::query_stats
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