DELIMITER $$
CREATE OR REPLACE DEFINER=`root`@`localhost` TRIGGER `vn`.`postCode_afterUpdate`
	AFTER UPDATE ON `postCode`
	FOR EACH ROW
BEGIN
	IF !(OLD.townFk <=> NEW.townFk) THEN
		CALL zoneGeo_setParent(NEW.geoFk,
			(SELECT geoFk FROM town WHERE id = NEW.townFk));
	END IF;

	IF !(OLD.`code` <=> NEW.`code`) THEN
		UPDATE zoneGeo SET `name` = NEW.`code`
			WHERE id = NEW.geoFk;
	END IF;
END$$
DELIMITER ;