取子節點

DROP FUNCTION IF EXISTS FUN_GET_CHILD_LIST;

CREATE FUNCTION FUN_GET_CHILD_LIST (ROOT_ID INT)
RETURNS varchar(1000)
BEGIN
DECLARE sTemp VARCHAR (1000) ;
DECLARE sTempChd VARCHAR (1000) ;
SET sTemp = '$' ;
SET sTempChd = CAST(ROOT_ID AS CHAR) ;
WHILE
sTempChd IS NOT NULL DO SET sTemp = CONCAT(sTemp, ',', sTempChd) ;
SELECT 
GROUP_CONCAT(id) INTO sTempChd 
FROM
uc_module 
WHERE FIND_IN_SET(parent_id, sTempChd) > 0 ;
END WHILE ;
RETURN sTemp ;
END;

select * from uc_module where FIND_IN_SET(id,FUN_GET_CHILD_LIST(1));

取父節點

DROP FUNCTION IF EXISTS FUN_GET_PARENT_LIST;

CREATE FUNCTION `FUN_GET_PARENT_LIST`(leafId varchar(20)) 
RETURNS varchar(1000) 
BEGIN 
DECLARE fid varchar(20) default ''; 
DECLARE str varchar(1000) default leafId; 
WHILE leafId is not null do 
SET fid =(SELECT parent_id FROM uc_module WHERE id = leafId); 
IF fid is not null THEN 
SET str = concat(str, ',', fid); 
SET leafId = fid; 
ELSE 
SET leafId = fid; 
END IF; 
END WHILE; 
return str; 
END

select*from uc_module where FIND_IN_SET(id,FUN_GET_PARENT_LIST(17));