A problem with a Materialized View

Question

Hi,
I have a ordinary table with a three column compound primary key (COL_Id, COL_ValidFrom, COL_CaseId)
I also have a MV that selects from that table. This one compiles just fine. It looks like this:
CREATE MATERIALIZED VIEW "MV_02"
REFRESH FORCE ON COMMIT
AS SELECT COL_Id, COL_ValidFrom, MAX(COL_CaseId) CaseId FROM TBL_MediaText GROUP BY COL_Id, COL_ValidFrom;
Works fine. Now I'm trying to create a second MV that selects from the first MV. It looks like this:
CREATE MATERIALIZED VIEW "MV_03"
REFRESH FORCE ON COMMIT
AS
SELECT a.COL_Id, a.CaseId, a.COL_ValidFrom, NVL(MIN(b.COL_ValidFrom)-1, TO_DATE('2099-12-31','yyyy-mm-dd')) ValidTo
FROM MV_02 a, MV_02 b
WHERE a.COL_Id=b.COL_Id(+) AND a.COL_ValidFrom < b.COL_ValidFrom(+)
GROUP BY a.COL_Id, a.CaseId, a.COL_ValidFrom;
This one does not parse. (ORA-12054) There seem to be a probelem with the ON COMMIT command. I have searched the web and found some info on the subject. It tells me to create a MV log, wich I have. I've also tried to put count(*) and count(b.COL_validfrom). But it just wont work.
I see a possibilty of yhe problem laying in te fact that I join using two parts of my PK. Also there might be a problem with the fact that i can't create a log for MV_02 WITH PRIMARY KEY. Or maybe you can't have a MV selecting from another MV?
Do anyone know how i should specify my Logs and/or querys in order for this to parse?
I'm using 10.1, and I do have the ON REFRESH COMMIT-privilege.
Thanks!
Message was edited by:
DavidNils

Answer 1

May be you are trying for this....I don't know how helpful is my solution for you.
SQL> CREATE MATERIALIZED VIEW MVE
  2  TABLESPACE JAM
  3  REFRESH FORCE ON COMMIT
  4  AS SELECT D.DEPTNO,D.DNAME, E.ENAME, E.JOB FROM
  5  EMP E, DEPT D
  6  WHERE D.DEPTNO = E.DEPTNO(+)
  7  /
Materialized view created.
SQL> CREATE MATERIALIZED VIEW MVEF
  2  TABLESPACE JAM
  3  REFRESH FORCE WITH ROWID
  4  AS SELECT * FROM MVE;
Materialized view created.Message was edited by:
Jameel