DELIMITER $$
CREATE FUNCTION `getParentList` (rootId VARCHAR (50)) RETURNS VARCHAR (1000)BEGIN
DECLARE sParentList VARCHAR (1000) ;
DECLARE sParentTemp VARCHAR(1000);
SET sParentTemp =CAST(rootId AS CHAR);
WHILE sParentTemp IS NOT NULL DO
IF (sParentList IS NOT NULL) THEN
SET sParentList = CONCAT(sParentTemp,'//m.sbmmt.com/m/',sParentList);
ELSE
SET sParentList = CONCAT(sParentTemp);
END IF;
SELECT GROUP_CONCAT(parent_module_id) INTO sParentTemp FROM TOP_SYS_MODULE WHERE FIND_IN_SET(module_id,sParentTemp)>0;
END WHILE;
RETURN sParentList;
END$$
DELIMITER ;
SELECT module_id,parent_module_id,getParentList(module_id) FROM TOP_SYS_MODULE;