salix/db/routines/vn/triggers/province_beforeUpdate.sql

DELIMITER $$
CREATE OR REPLACE DEFINER=`vn`@`localhost` TRIGGER `vn`.`province_beforeUpdate`
	BEFORE UPDATE ON `province`
	FOR EACH ROW
BEGIN 
	
	IF !(OLD.autonomyFk <=> NEW.autonomyFk) THEN
	
		SET NEW.countryFk = (SELECT a.countryFk FROM vn.autonomy a WHERE a.id = NEW.autonomyFk);

	END IF;
	
END$$
DELIMITER ;