mysql中实现类似oracle的SYS_CONNECT_BY_PATH功能 oracle中的SYS_CONNECT_BY_PATH函数为开发带来了便利,mysql中如何实现类的功能呢? DELIMITER $$ CREATE FUNCTION `getParentList` (rootId VARCHAR (50)) RETURNS VARCHAR (1000) BEGIN DECLARE sParentLis
mysql中实现类似oracle的SYS_CONNECT_BY_PATH功能
oracle中的SYS_CONNECT_BY_PATH函数为开发带来了便利,mysql中如何实现类似的功能呢?
DELIMITER $$
CREATE FUNCTION `getParentList` (rootId VARCHAR (50)) RETURNS VARCHAR (1000)
BEGIN
DECLARE sParentList VARCHAR (1000) ;
DECLARE sParentTemp VARCHAR(1000);
SET sParentTemp =CAST(rootId AS CHAR);
WHILE sParentTemp IS NOT NULL DO
IF (sParentList IS NOT NULL) THEN
SET sParentList = CONCAT(sParentTemp,'/',sParentList);
ELSE
SET sParentList = CONCAT(sParentTemp);
END IF;
SELECT GROUP_CONCAT(parent_module_id) INTO sParentTemp FROM TOP_SYS_MODULE WHERE FIND_IN_SET(module_id,sParentTemp)>0;
END WHILE;
RETURN sParentList;
END$$
DELIMITER ;
SELECT module_id,parent_module_id,getParentList(module_id) FROM TOP_SYS_MODULE;
Statement:The content of this article is voluntarily contributed by netizens, and the copyright belongs to the original author. This site does not assume corresponding legal responsibility. If you find any content suspected of plagiarism or infringement, please contact admin@php.cn