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/**
* Copyright (C) 2015 MongoDB Inc.
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License, version 3,
* as published by the Free Software Foundation.
*
* 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
* GNU Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*
* 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 GNU Affero General 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.
*/
#define MONGO_LOG_DEFAULT_COMPONENT ::mongo::logger::LogComponent::kCommand
#include "mongo/platform/basic.h"
#include "mongo/db/catalog/drop_indexes.h"
#include "mongo/db/background.h"
#include "mongo/db/catalog/collection.h"
#include "mongo/db/catalog/database.h"
#include "mongo/db/catalog/index_catalog.h"
#include "mongo/db/client.h"
#include "mongo/db/concurrency/write_conflict_exception.h"
#include "mongo/db/curop.h"
#include "mongo/db/db_raii.h"
#include "mongo/db/index/index_descriptor.h"
#include "mongo/db/index_builder.h"
#include "mongo/db/repl/replication_coordinator_global.h"
#include "mongo/db/service_context.h"
#include "mongo/util/log.h"
namespace mongo {
namespace {
Status wrappedRun(OperationContext* txn,
const StringData& dbname,
const std::string& toDeleteNs,
Database* const db,
const BSONObj& jsobj,
BSONObjBuilder* anObjBuilder) {
if (!serverGlobalParams.quiet) {
LOG(0) << "CMD: dropIndexes " << toDeleteNs;
}
Collection* collection = db ? db->getCollection(toDeleteNs) : nullptr;
// If db/collection does not exist, short circuit and return.
if (!db || !collection) {
return Status(ErrorCodes::NamespaceNotFound, "ns not found");
}
OldClientContext ctx(txn, toDeleteNs);
BackgroundOperation::assertNoBgOpInProgForNs(toDeleteNs);
IndexCatalog* indexCatalog = collection->getIndexCatalog();
anObjBuilder->appendNumber("nIndexesWas", indexCatalog->numIndexesTotal(txn));
BSONElement f = jsobj.getField("index");
if (f.type() == String) {
std::string indexToDelete = f.valuestr();
if (indexToDelete == "*") {
Status s = indexCatalog->dropAllIndexes(txn, false);
if (!s.isOK()) {
return s;
}
anObjBuilder->append("msg", "non-_id indexes dropped for collection");
return Status::OK();
}
IndexDescriptor* desc = collection->getIndexCatalog()->findIndexByName(txn, indexToDelete);
if (desc == NULL) {
return Status(ErrorCodes::IndexNotFound,
str::stream() << "index not found with name [" << indexToDelete << "]");
}
if (desc->isIdIndex()) {
return Status(ErrorCodes::InvalidOptions, "cannot drop _id index");
}
Status s = indexCatalog->dropIndex(txn, desc);
if (!s.isOK()) {
return s;
}
return Status::OK();
}
if (f.type() == Object) {
IndexDescriptor* desc =
collection->getIndexCatalog()->findIndexByKeyPattern(txn, f.embeddedObject());
if (desc == NULL) {
return Status(ErrorCodes::IndexNotFound,
str::stream()
<< "can't find index with key: " << f.embeddedObject().toString());
}
if (desc->isIdIndex()) {
return Status(ErrorCodes::InvalidOptions, "cannot drop _id index");
}
Status s = indexCatalog->dropIndex(txn, desc);
if (!s.isOK()) {
return s;
}
return Status::OK();
}
return Status(ErrorCodes::IndexNotFound, "invalid index name spec");
}
} // namespace
Status dropIndexes(OperationContext* txn,
const NamespaceString& nss,
const BSONObj& idxDescriptor,
BSONObjBuilder* result) {
StringData dbName = nss.db();
MONGO_WRITE_CONFLICT_RETRY_LOOP_BEGIN {
ScopedTransaction transaction(txn, MODE_IX);
AutoGetDb autoDb(txn, dbName, MODE_X);
bool userInitiatedWritesAndNotPrimary = txn->writesAreReplicated() &&
!repl::getGlobalReplicationCoordinator()->canAcceptWritesFor(nss);
if (userInitiatedWritesAndNotPrimary) {
return Status(ErrorCodes::NotMaster,
str::stream() << "Not primary while dropping indexes in " << nss.ns());
}
WriteUnitOfWork wunit(txn);
Status status = wrappedRun(txn, dbName, nss.ns(), autoDb.getDb(), idxDescriptor, result);
if (!status.isOK()) {
return status;
}
auto opObserver = getGlobalServiceContext()->getOpObserver();
if (opObserver)
opObserver->onDropIndex(txn, dbName.toString() + ".$cmd", idxDescriptor);
wunit.commit();
}
MONGO_WRITE_CONFLICT_RETRY_LOOP_END(txn, "dropIndexes", dbName);
return Status::OK();
}
} // namespace mongo
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