DELIMITER $$
CREATE OR REPLACE DEFINER=`root`@`localhost` TRIGGER `bs`.`nightTask_beforeUpdate`
	BEFORE UPDATE ON `nightTask`
	FOR EACH ROW
BEGIN

	IF NOT (NEW.`schema`REGEXP '^[0-9a-zA-Z_]+$') OR NOT (NEW.`procedure`REGEXP '^[0-9a-zA-Z_]+$') THEN

		CALL util.throw('ONLY_ALPHANUMERICS_ALLOWED');
		
	END IF;

END$$
DELIMITER ;
