DELIMITER ;; CREATE TRIGGER `foo_before_insert` -- 触发器的名称 BEFORE INSERT ON `foo` -- 表名
FOR EACH ROW BEGIN IF new.id IS NULL THEN SET new.id = uuid(); END IF; END;; DELIMITER ;
代码源于：https://stackoverflow.com/questions/46134550/mysql-set-default-id-uuid
原文：https://www.cnblogs.com/Jcc-learningnotes/p/13910626.html