$changeTagDefStore = MediaWikiServices::getInstance()->getChangeTagDefStore();
try {
$this->addWhereFld( 'ct_tag_id', $changeTagDefStore->getId( $params['tag'] ) );
$changeTagDefStore = MediaWikiServices::getInstance()->getChangeTagDefStore();
try {
$this->addWhereFld( 'ct_tag_id', $changeTagDefStore->getId( $params['tag'] ) );