DB2 SQL Extract hierarchy from linked list like table

CREATE TABLE EMPL
 (
 NAME VARCHAR(15),
 EMPID INT NOT NULL PRIMARY KEY,
 MGRID INT
 );

INSERT INTO EMPL VALUES
 ('Sal',       1, NULL),
 ('Berni',     2, 1),
 ('Serge',     3, 2),
 ('Kathy',     4, 2),
 ('David',     5, 1),
 ('Katherine', 6, 5),
 ('Miro',      7, 6),
 ('John',      8, 6),
 ('Rick',      9, 6),
 ('Eric',     10, 7),
 ('Steve',    11, 7),
 ('Haiwei',   12, 7),
 ('Yuri',     13, 8),
 ('Kaarel',   14, 8);

WITH n(empid, name, mgrid) AS
 (SELECT empid, name, mgrid
 FROM EMPL
 WHERE name = 'Sal'
 UNION ALL
 SELECT nplus1.empid, nplus1.name, nplus1.mgrid
 FROM EMPL as nplus1, n
 WHERE n.empid = nplus1.mgrid
 )
 SELECT empid, name, mgrid FROM n;

-- With level
 WITH n(empid, name, mgrid, lvl) AS
 (SELECT empid, name, mgrid, 1 as lvl
 FROM EMPL
 WHERE name = 'Sal'
 UNION ALL
 SELECT nplus1.empid, nplus1.name, nplus1.mgrid, n.lvl+1 as lvl
 FROM EMPL as nplus1, n
 WHERE n.empid = nplus1.mgrid
 )
 SELECT empid, name, mgrid, lvl FROM n;

Results:
EMPID|NAME|MGRID|LVL
1|Sal|(null)|1
2|Berni|1|2
5|David|1|2
3|Serge|2|3
4|Kathy|2|3
6|Katherine|5|3
7|Miro|6|4
8|John|6|4
9|Rick|6|4
10|Eric|7|5
11|Steve|7|5
12|Haiwei|7|5
13|Yuri|8|5
14|Kaarel|8|5