DELIMITER $$
CREATE OR REPLACE DEFINER=`vn`@`localhost` TRIGGER `hedera`.`link_afterUpdate`
	AFTER UPDATE ON `link`
	FOR EACH ROW
BEGIN
	IF !(NEW.image <=> OLD.image) THEN
		CALL image_unref('link', OLD.image);
		CALL image_ref('link', NEW.image);
	END IF;
END$$
DELIMITER ;
