mysql 递归查询父节点 和子节点

查父集合

--drop FUNCTION `getParentList`
CREATE FUNCTION `getParentList`(rootId varchar(100))
RETURNS varchar(1000)
BEGIN
DECLARE fid varchar(100) default '';
DECLARE str varchar(1000) default rootId;   

WHILE rootId is not null  do
    SET fid =(SELECT parentid FROM treeNodes WHERE id = rootId);
    IF fid is not null THEN
        SET str = concat(str, ',', fid);
        SET rootId = fid;
    ELSE
        SET rootId = fid;
    END IF;
END WHILE;
return str;
END 

查询语句

select getParentList('');   

select * from sbkfwh where FIND_IN_SET(id,getParentList(''))   

查子集合

--drop FUNCTION `getChildList`
CREATE FUNCTION `getChildList`(rootId varchar(100))
RETURNS varchar(2000)
BEGIN
DECLARE str varchar(2000);
DECLARE cid varchar(100);
SET str = '$';
SET cid = rootId;
WHILE cid is not null DO
    SET str = concat(str, ',', cid);
    SELECT group_concat(id) INTO cid FROM treeNodes where FIND_IN_SET(parentid, cid) > 0;
END WHILE;
RETURN str;
END 

查询语句

select getParentList('');
select * from sbkfwh where FIND_IN_SET(id,getChildList(''))