execute('ALTER TABLE `' . _DB_PREFIX_ . 'ets_rv_mail_log` CHANGE `employee` `employee` INT(10) UNSIGNED NOT NULL DEFAULT 0;'); Db::getInstance()->execute('ALTER TABLE `' . _DB_PREFIX_ . 'ets_rv_tracking` CHANGE `employee` `employee` INT(10) UNSIGNED NOT NULL DEFAULT 0;'); Db::getInstance()->execute('ALTER TABLE `' . _DB_PREFIX_ . 'ets_rv_email_queue` CHANGE `employee` `employee` INT(10) UNSIGNED NOT NULL DEFAULT 0;'); return true; }