protected function ensureMigrateColumn(\databox $databox)
    {
        try {
            $sql = 'ALTER TABLE `record`
                    ADD `migrate35` TINYINT( 1 ) UNSIGNED NOT NULL ,
                    ADD INDEX ( `migrate35` ) ';
            $stmt = $databox->get_connection()->prepare($sql);
            $stmt->execute();
            $stmt->closeCursor();
        } catch (\Exception $e) {

        }
    }