遞迴查詢父類的所有子節點
select * from (
select t1.*,
if(find_in_set(parentid, @pids) > 0, @pids := concat(@pids, ',', id), 0) as ischild
from (
select * from tbl_dept t where t.status = 0 order by parentid, id
) t1,
(select @pids := 2) t2
) t3 where ischild != 0
hibernate 報錯 space is not allowed after parameter prefix 『:』
解決方式：
//根據子id遞迴查詢所有父節點
select id,name,level,parentid
from (
select
@r as _id,
(select @r := parentid from tbl_dept where id = _id) as parent_id,
@l := @l + 1 as lvl
from
(select @r := 8, @l := 0) vars,
tbl_dept h
where @r <> 0) t1
join tbl_dept t2
on t1._id = t2.id
order by id
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