sql 递归查询 孩子节点数据

# sql 递归查询 孩子节点数据

-- 向上查询（查询所有父亲节点，包含自己）
WITH RECURSIVE res AS (
    SELECT t1.* FROM gaia_ocm_area AS t1
    --WHERE t1.id = '当前节点'
    UNION
    SELECT t2.* FROM gaia_ocm_area AS t2
    INNER JOIN res AS t3 ON t2.id = t3.parent_id  
    WHERE 1=1
)
SELECT res.* FROM res

-- 向下查询（查询所有孩子节点，包含自己）
WITH RECURSIVE res AS (
    SELECT t1.* FROM gaia_ocm_area AS t1  
    --WHERE t1.id = '当前节点'
    UNION 
    SELECT t2.* FROM gaia_ocm_area AS t2
    INNER JOIN res AS t3 ON t3.id = t2.parent_id
    WHERE 1=1
)
SELECT res.* from res

-- 向下查询（查询所有儿子节点，不包含自己） -->
WITH RECURSIVE res AS (
    SELECT t1.* FROM gaia_ocm_area AS t1
    WHERE t1.parent_id = #{
     currentNodeId}
    UNION
    SELECT t2.* FROM gaia_ocm_area AS t2
    INNER JOIN res AS t3 ON t3.id = t2.parent_id
)
SELECT res.* from res