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/**
* Copyright (C) 2021-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_utils.h"
#include "mongo/db/exec/sbe/match_path.h"
namespace mongo {
bool sortPatternHasPartsWithCommonPrefix(const SortPattern& sortPattern) {
StringDataSet prefixSet;
for (const auto& part : sortPattern) {
// Ignore any $meta sorts that may be present.
if (!part.fieldPath) {
continue;
}
auto [_, inserted] = prefixSet.insert(part.fieldPath->getFieldName(0));
if (!inserted) {
return true;
}
}
return false;
}
bool isIdHackEligibleQuery(const CollectionPtr& collection, const CanonicalQuery& query) {
const auto& findCommand = query.getFindCommandRequest();
return !findCommand.getShowRecordId() && findCommand.getHint().isEmpty() &&
findCommand.getMin().isEmpty() && findCommand.getMax().isEmpty() &&
!findCommand.getSkip() && CanonicalQuery::isSimpleIdQuery(findCommand.getFilter()) &&
!findCommand.getTailable() &&
CollatorInterface::collatorsMatch(query.getCollator(), collection->getDefaultCollator());
}
bool isQuerySbeCompatible(const CollectionPtr* collection, const CanonicalQuery* cq) {
tassert(6071400, "Expected CanonicalQuery pointer to not be nullptr", cq);
invariant(cq);
auto expCtx = cq->getExpCtxRaw();
const auto& sortPattern = cq->getSortPattern();
const bool allExpressionsSupported =
expCtx && expCtx->sbeCompatibility != SbeCompatibility::notCompatible;
const auto nss = cq->nss();
const bool isNotOplog = !nss.isOplog();
const bool isNotChangeCollection = !nss.isChangeCollection();
const bool doesNotContainMetadataRequirements = cq->metadataDeps().none();
const bool doesNotSortOnMetaOrPathWithNumericComponents =
!sortPattern || std::all_of(sortPattern->begin(), sortPattern->end(), [](auto&& part) {
return part.fieldPath &&
!sbe::MatchPath(part.fieldPath->fullPath()).hasNumericPathComponents();
});
// Queries against a time-series collection are not currently supported by SBE.
const bool isQueryNotAgainstTimeseriesCollection = !nss.isTimeseriesBucketsCollection();
// Queries against a clustered collection are not currently supported by SBE.
tassert(6038600, "Expected CollectionPtr to not be nullptr", collection);
const bool isQueryNotAgainstClusteredCollection =
!(collection->get() && collection->get()->isClustered());
const auto* proj = cq->getProj();
const bool doesNotRequireMatchDetails = !proj || !proj->requiresMatchDetails();
const bool doesNotHaveElemMatchProject = !proj || !proj->containsElemMatch();
const bool isNotInnerSideOfLookup = !(expCtx && expCtx->inLookup);
return allExpressionsSupported && doesNotContainMetadataRequirements &&
isQueryNotAgainstTimeseriesCollection && isQueryNotAgainstClusteredCollection &&
doesNotSortOnMetaOrPathWithNumericComponents && isNotOplog && doesNotRequireMatchDetails &&
doesNotHaveElemMatchProject && isNotChangeCollection && isNotInnerSideOfLookup &&
!(*collection && isIdHackEligibleQuery(*collection, *cq));
}
bool isQueryPlanSbeCompatible(const QuerySolution* root) {
tassert(7061701, "Expected QuerySolution pointer to not be nullptr", root);
// TODO SERVER-52958: Add support in the SBE stage builders for the COUNT_SCAN stage.
const bool isNotCountScan = !root->hasNode(StageType::STAGE_COUNT_SCAN);
return isNotCountScan;
}
} // namespace mongo
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