ORA-22905 with pipelined function

Question

Hi,
I have a strange behaviour that I do not understand.
The code below does not work. It gives me the following errors:
ORA-22905: cannot access rows from a non-nested table item
ORA-06512: at line 10
ORA-06512: at line 19
The problem comes from the line 14 in that function
adm_usergroup.GET_GROUPIDS (userid_in)
If I replace the variable userid_in by its values then it perfectly works.
Can someone give me an explanation ?
The adm_usergroup.GET_GROUPIDS (userid_in) is a pipelined function that querry a group of tables and return IDs which are number.
A call to the function works fine as using it directly in a select statement.
Cheers,
Sebastien
1 DECLARE
2 l_groups AUTH_TYPE.GROUP_RT;
3 l_groups_rec authgroup%ROWTYPE;
4
5 FUNCTION GET_GROUPS (userid_in IN AUTHUSER.USERID%TYPE)
6 RETURN AUTH_TYPE.GROUP_RT
7 IS
8 l_groups_rt AUTH_TYPE.GROUP_RT;
9 BEGIN
10 OPEN l_groups_rt FOR
11 SELECT ag.*
12 FROM authgroup ag
13 WHERE AG.GROUPID IN
14 (SELECT * FROM table (adm_usergroup.GET_GROUPIDS (userid_in)));
15
16 RETURN l_groups_rt;
17 END GET_GROUPS;
18 BEGIN
19 l_groups := GET_GROUPS (1);
20
21 LOOP
22 FETCH l_groups INTO l_groups_rec;
23
24 EXIT WHEN l_groups%NOTFOUND;
25 DBMS_OUTPUT.put_line ('ID: ' || l_groups_rec.groupid);
26 END LOOP;
27
28 CLOSE l_groups;
29 END;

Answer 1

by the way here is the full code
CREATE OR REPLACE PACKAGE AUTHDB.ADM_USERGROUP
IS
   -- get the group and sub-group ids of a given user id
   FUNCTION get_groupids (userid_in IN AUTHUSER.USERID%TYPE)
      RETURN authgroup_set
      PIPELINED;
END;
CREATE OR REPLACE PACKAGE BODY AUTHDB.ADM_USERGROUP
IS
FUNCTION get_groupids (userid_in IN AUTHUSER.USERID%TYPE)
      RETURN authgroup_set
      PIPELINED
   IS
      CURSOR group_cur
      IS
         SELECT   mo.groupid
           FROM   memberof mo
          WHERE   MO.USERID = userid_in
         UNION
             SELECT   gh.groupid
               FROM   GROUPHIERARCHY gh
         CONNECT BY   PRIOR GH.GROUPID = GH.PARENTGROUP_ID
         START WITH   GH.PARENTGROUP_ID IN (SELECT   mo.groupid
                                              FROM   memberof mo
                                             WHERE   MO.USERID = userid_in);
   BEGIN
      FOR rec IN group_cur
      LOOP
         PIPE ROW (authgroup_type (REC.GROUPID));
      END LOOP;
   END;
END;
CREATE OR REPLACE
TYPE        AUTHDB.AUTHGROUP_TYPE AS OBJECT (GROUPID NUMBER (10));
CREATE OR REPLACE
TYPE        AUTHGROUP_SET AS TABLE OF authgroup_type;
DECLARE
   l_groups       AUTH_TYPE.GROUP_RT;
   l_groups_rec   authgroup%ROWTYPE;
   FUNCTION GET_GROUPS (userid_in IN AUTHUSER.USERID%TYPE)
      RETURN AUTH_TYPE.GROUP_RT
   IS
      l_groups_rt   AUTH_TYPE.GROUP_RT;
   BEGIN
      OPEN l_groups_rt FOR
         SELECT   ag.*
           FROM   authgroup ag
          WHERE   AG.GROUPID IN
                        (SELECT   * FROM table (cast(adm_usergroup.GET_GROUPIDS (userid_in) as authgroup_set)));
      RETURN l_groups_rt;
   END GET_GROUPS;
BEGIN
   l_groups := GET_GROUPS (1);
   LOOP
      FETCH l_groups INTO   l_groups_rec;
      EXIT WHEN l_groups%NOTFOUND;
      DBMS_OUTPUT.put_line ('ID: ' || l_groups_rec.groupid);
   END LOOP;
   CLOSE l_groups;
END;