myql中常用上级路径包含本身

陈勇劲2024-01-18 8:43

mysql自定义函数获取上级的路径实例

sql 复制代码

CREATE  FUNCTION `querydept_path_name`(depetId VARCHAR(255)) RETURNS varchar(255) CHARSET utf8
BEGIN
DECLARE sTempPath VARCHAR(255);
DECLARE sTempChd VARCHAR(255);
DECLARE sFullPath VARCHAR(255);
 
SET sTempChd = depetId;
SET sFullPath ='';
SET sTempPath ='';
 
WHILE (sTempChd <> '' ) DO
select ifnull((SELECT dept_name FROM dept_info  WHERE id = sTempChd),'') INTO sTempPath;
SET sFullPath = CONCAT(sFullPath,sTempPath,'/');
select ifnull((SELECT parent_id FROM dept_info  WHERE id = sTempChd),'')  INTO sTempChd;

END WHILE;
 
RETURN sFullPath;
END

函数创建失败错误信息

创建函数时报错信息

sql 复制代码

[Err] 1418 - 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

解决方法

在mysql数据库中执行以下语句（临时生效，重启后失效）

sql 复制代码

set global log_bin_trust_function_creators=TRUE;

或者

sql 复制代码

set global log_bin_trust_function_creators=1;

在配置文件/etc/my.cnf的[mysqld]或者my-default.ini文件中配置

sql 复制代码

[mysqld]
log_bin_trust_function_creators=1

测试函数路径

默认路径为逆序

sql 复制代码

select querydept_path_name('10011')

路径正序

sql 复制代码

select REVERSE(querydept_path_name('10011'))