+ if ( $wgChangeTagsSchemaMigrationStage > MIGRATION_WRITE_BOTH ) {
+ $changeTagDefStore = MediaWikiServices::getInstance()->getChangeTagDefStore();
+ try {
+ $this->addWhereFld( 'ct_tag_id', $changeTagDefStore->getId( $params['tag'] ) );
+ } catch ( NameTableAccessException $exception ) {
+ // Return nothing.
+ $this->addWhere( '1=0' );
+ }
+ } else {
+ $this->addWhereFld( 'ct_tag', $params['tag'] );
+ }