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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/platform/basic.h"
#include "mongo/db/exec/sbe/stages/collection_helpers.h"
#include "mongo/db/catalog/collection_catalog.h"
namespace mongo::sbe {
std::tuple<CollectionPtr, NamespaceString, uint64_t> acquireCollection(OperationContext* opCtx,
const UUID& collUuid) {
// The collection is either locked at a higher level or a snapshot of the catalog (consistent
// with the storage engine snapshot from which we are reading) has been stashed on the
// 'OperationContext'. Either way, this means that the UUID must still exist in our view of the
// collection catalog.
CollectionPtr collPtr = CollectionCatalog::get(opCtx)->lookupCollectionByUUID(opCtx, collUuid);
tassert(5071000, str::stream() << "Collection uuid " << collUuid << " does not exist", collPtr);
auto nss = collPtr->ns();
return std::make_tuple(
std::move(collPtr), std::move(nss), CollectionCatalog::get(opCtx)->getEpoch());
}
CollectionPtr restoreCollection(OperationContext* opCtx,
const NamespaceString& collName,
const UUID& collUuid,
uint64_t catalogEpoch) {
// Re-lookup the collection pointer, by UUID. If the collection has been dropped, then this UUID
// lookup will result in a null pointer. If the collection has been renamed, then the resulting
// collection object should have a different name from the original 'collName'. In either
// scenario, we throw a 'QueryPlanKilled' error and terminate the query.
CollectionPtr collPtr = CollectionCatalog::get(opCtx)->lookupCollectionByUUID(opCtx, collUuid);
if (!collPtr) {
PlanYieldPolicy::throwCollectionDroppedError(collUuid);
}
if (collName != collPtr->ns()) {
PlanYieldPolicy::throwCollectionRenamedError(collName, collPtr->ns(), collUuid);
}
uassert(ErrorCodes::QueryPlanKilled,
"the catalog was closed and reopened",
CollectionCatalog::get(opCtx)->getEpoch() == catalogEpoch);
return collPtr;
}
} // namespace mongo::sbe
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