mysql用户自定义函数实例与部分问题解决方法_MySQL

一、查看创建函数的功能是否开启：

mysql> show variables like '%func%';+-----------------------------------------+-------+| Variable_name | Value |+-----------------------------------------+-------+| log_bin_trust_function_creators | ON |+-----------------------------------------+-------+1 row in set (0.02 sec)

二、如果Value处值为OFF，则需将其开启。

mysql> set global log_bin_trust_function_creators=1;use app02delimiter //mysql>DROP FUNCTION IF EXISTS `testhanshu`;CREATE FUNCTION `testhanshu`(`tustate` int)RETURNS varchar(2000)BEGINdeclare oneAddr varchar(200) default '';declare allAddr varchar(2000) default '';DECLARE done INT DEFAULT FALSE;declare curl CURSOR for select utruename from tsys_user where ustate = tustate;DECLARE CONTINUE HANDLER FOR NOT FOUND SET done = 1;open curl;  REPEATFETCH curl INTO oneAddr;IF NOT done THENset oneAddr = CONCAT(oneAddr, ';');set allAddr = CONCAT(allAddr, oneAddr);END IF;UNTIL done END REPEAT;close curl;RETURN allAddr;END;mysql>select testhanshu(1);

在使用MySql自己定义的函数时，出现错误java.sql.SQLException: This function has none of DETERMINISTIC, NO SQL, or READS SQL DATA in its declaration and binary logging is enabled (you *might* want to use the less safe log_bin_trust_function_creators variable)

解决办法有三种：

1. 登录MySql客户端，执行： SET GLOBAL log_bin_trust_function_creators = 1;
2.在登录MySQL服务器是，在服务启动时加上 “--log-bin-trust-function-creators=1 ”参数并设置为1。
3.在my.ini（my.cnf）中的[mysqld]区段中加上 log-bin-trust-function-creators=1。

以上就是mysql用户自定义函数实例与部分问题解决方法_MySQL的内容，