mysql的从子到父递归查询

mysql实现递归
select * from table start with id in (id个数未知)

connect by prior parent_id=id
这是oracle的，想转成mysql的
表结构
id name code parent_id
1 aaa 001 null
2 bbb 001.002 1
就是普通的树形结构，在线等啊！！！

mysql要想是想start with 得自己写个方法

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  

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