DELIMITER $$
CREATE OR REPLACE DEFINER=`vn`@`localhost` TRIGGER `vn`.`mandate_beforeInsert`
	BEFORE INSERT ON `mandate`
	FOR EACH ROW
BEGIN
	IF (NEW.code IS NULL) THEN
		SET NEW.code=CONCAT(NEW.clientFk,'-',(SELECT AUTO_INCREMENT 
		    FROM information_schema.TABLES 
		    WHERE TABLE_SCHEMA='vn' and TABLE_NAME='mandate'));
    END IF;
END$$
DELIMITER ;