DB2 select 报22001异常

WITH t1(u,o,num) AS (    SELECT user_id,organ_id,row_number() over(PARTITION BY user_id ORDER BY organ_id) FROM V_ORGAN_USER_INFO),t2(au,ao,anum) AS (    SELECT u,o,num FROM t1 WHERE num=1    UNION ALL    SELECT t1.u,t2.ao||','||t1.o,t1.num FROM t1,t2     WHERE t1.num=t2.anum+1 AND t1.u=t2.au [color=#FF0000]AND t1.num <3[/color])SELECT au,ao FROM t2WHERE aNUM = (SELECT max(anum) FROM t2 temp WHERE temp.au=t2.au)ORDER BY t2.au;