Find all ancestors up to 3 level

WITH lvl1 AS
         (SELECT dir_id , 1 AS Lvl
          FROM t_directory AS tart1
          WHERE tart1.parentDirectory = 201
         )
        ,
     lvl2 AS
         (
             SELECT dir_id, 2 AS Lvl
             FROM t_directory AS tart2
             WHERE tart2.parentDirectory IN (SELECT dir_id FROM lvl1)
         ),
     lvl3 AS
         (
             SELECT dir_id, 3 AS Lvl
             FROM t_directory AS tart3
             WHERE tart3.parentDirectory IN (SELECT dir_id FROM lvl2)
         )
SELECT dir_id, Lvl FROM lvl1
UNION
SELECT dir_id, Lvl FROM lvl2
UNION
SELECT dir_id, Lvl FROM lvl3