[sql] Oracle - How to create a materialized view with FAST REFRESH and JOINS

So I'm pretty sure Oracle supports this, so I have no idea what I'm doing wrong. This code works:

CREATE MATERIALIZED VIEW MV_Test
  NOLOGGING
  CACHE
  BUILD IMMEDIATE 
  REFRESH FAST ON COMMIT 
  AS
    SELECT V.* FROM TPM_PROJECTVERSION V;

If I add in a JOIN, it breaks:

CREATE MATERIALIZED VIEW MV_Test
  NOLOGGING
  CACHE
  BUILD IMMEDIATE 
  REFRESH FAST ON COMMIT 
  AS
    SELECT V.*, P.* FROM TPM_PROJECTVERSION V
    INNER JOIN TPM_PROJECT P ON P.PROJECTID = V.PROJECTID

Now I get the error:

ORA-12054: cannot set the ON COMMIT refresh attribute for the materialized view

I've created materialized view logs on both TPM_PROJECT and TPM_PROJECTVERSION. TPM_PROJECT has a primary key of PROJECTID and TPM_PROJECTVERSION has a compound primary key of (PROJECTID,VERSIONID). What's the trick to this? I've been digging through Oracle manuals to no avail. Thanks!

You will get the error on REFRESH_FAST, if you do not create materialized view logs for the master table(s) the query is referring to. If anyone is not familiar with materialized views or using it for the first time, the better way is to use oracle sqldeveloper and graphically put in the options, and the errors also provide much better sense.

Have you tried it without the ANSI join ?

CREATE MATERIALIZED VIEW MV_Test
  NOLOGGING
  CACHE
  BUILD IMMEDIATE 
  REFRESH FAST ON COMMIT 
  AS
SELECT V.*, P.* FROM TPM_PROJECTVERSION V,TPM_PROJECT P 
WHERE  P.PROJECTID = V.PROJECTID

The key checks for FAST REFRESH includes the following:

1) An Oracle materialized view log must be present for each base table.
2) The RowIDs of all the base tables must appear in the SELECT list of the MVIEW query definition.
3) If there are outer joins, unique constraints must be placed on the join columns of the inner table.

No 3 is easy to miss and worth highlighting here