private function checkIfRatingExists($ratingId)
    {
        $ratingId = MySqlLegacySupport::getInstance()->real_escape_string($ratingId);

        $sQuery = "SELECT COUNT(*) AS item_count FROM pkg_shop_rating_service_rating WHERE remote_key = '".$ratingId."' ";
        $result = MySqlLegacySupport::getInstance()->query($sQuery);
        if ($result) {
            $row = MySqlLegacySupport::getInstance()->fetch_object($result);
            if ($row->item_count < 1) {
                return false;
            }
        }

        return true;
    }