<pre name="code" class="html">root 用户创建函数; delimiter $$ CREATE FUNCTION `loadTreeByParent`(begin_sn INT) RETURNS varchar(600) CHARSET utf8 BEGIN DECLARE rest VARCHAR(600); DECLARE temp VARCHAR(60); SET rest='$'; SET temp=CAST(begin_sn AS CHAR); WHILE temp IS NOT NULL DO SET rest=CONCAT(rest,',',temp); SELECT GROUP_CONCAT(sn) INTO temp FROM ClientManager WHERE FIND_IN_SET(parent,temp)>0; END WHILE; RETURN rest; END$$ CREATE DEFINER=`root`@`%` FUNCTION `loadTreeByParent`(begin_sn INT) RETURNS varchar(600) CHARSET utf8 BEGIN DECLARE rest VARCHAR(600); DECLARE temp VARCHAR(60); SET rest='$'; SET temp=CAST(begin_sn AS CHAR); WHILE temp IS NOT NULL DO SET rest=CONCAT(rest,',',temp); SELECT GROUP_CONCAT(sn) INTO temp FROM ClientManager WHERE FIND_IN_SET(parent,temp)>0; END WHILE; RETURN rest; END zjzc_app 创建函数; drop function loadTreeByParent; CREATE DEFINER=`zjzc_app`@`%` FUNCTION `loadTreeByParent`(begin_sn INT) RETURNS varchar(600) CHARSET utf8 BEGIN DECLARE rest VARCHAR(600); DECLARE temp VARCHAR(60); SET rest='$'; SET temp=CAST(begin_sn AS CHAR); WHILE temp IS NOT NULL DO SET rest=CONCAT(rest,',',temp); SELECT GROUP_CONCAT(sn) INTO temp FROM ClientManager WHERE FIND_IN_SET(parent,temp)>0; END WHILE; RETURN rest; END 用root用户登录,执行; zjzc-mysql:/root# cat t1.sql $$ CREATE DEFINER=`zjzc_app`@`%` FUNCTION `loadTreeByParent`(begin_sn INT) RETURNS varchar(600) CHARSET utf8 BEGIN DECLARE rest VARCHAR(600); DECLARE temp VARCHAR(60); SET rest='$'; SET temp=CAST(begin_sn AS CHAR); WHILE temp IS NOT NULL DO SET rest=CONCAT(rest,',',temp); SELECT GROUP_CONCAT(sn) INTO temp FROM ClientManager WHERE FIND_IN_SET(parent,temp)>0; END WHILE; RETURN rest; END$$ zjzc-mysql:/root# mysql -A -uroot -p1234567 Warning: Using a password on the command line interface can be insecure. Welcome to the MySQL monitor. Commands end with ; or g. Your MySQL connection id is 241 Server version: 5.6.22-log Source distribution Copyright (c) 2000, 2014, Oracle and/or its affiliates. All rights reserved. Oracle is a registered trademark of Oracle Corporation and/or its affiliates. Other names may be trademarks of their respective owners. Type 'help;' or 'h' for help. Type 'c' to clear the current input statement. mysql> use zjzc; Database changed mysql> source t1.sql ERROR 1304 (42000): FUNCTION loadTreeByParent already exists mysql> drop function loadTreeByParent -> ; Query OK, 0 rows affected (0.00 sec) mysql> source t1.sql Query OK, 0 rows affected (0.00 sec) [DEFINER = { user | CURRENT_USER }]:定义创建者,可以手动指定数据库中已经存在的用户,或者默认(使用当前用户).