How to use Oracle Hints in OBIEE

Hello guys
I have a report that is running forever and I have reviewed the explain plan over and over, which makes me think that the join between these 2 tables are slowing everything down --- The fact table has 10Billion records and the Dim has 10 Millions records. Even if the report has filters on various columns of the 2 tables, it is still taking forever. The explain is showing that its doing a nested loop join of these 2 tables which takes a lot of time.
I am thinking of using some Hint to force the query to scan the dimension table first (with the filter condition I defined, it will return 80 rows only from Dim table), and then use the result set of the scanning to go and look for matching records only in the fact table. Its should help speed up the query..
I'd like to know what kind of hints can help with that kind of operation, also how to define these kind of hints in OBIEE. Now I know that in Physical Layers, I can include hints in physical table property, but how to determine which table (fact or dim) to embed the join hints?
Need advice from anybody who have experience working with hints?
Much appreciation!

Just an update:
I have tried a couple of join operation hints like USE_NL and USE_HASH hints, it changes the join method but didn't help with performance at all.
The original SQL that OBIEE generates is: ----------Takes about 20 mins to return a dozen rows
select sum(T991020.LP Amount) as c1,
T991021.DAYOFWEEK as c2,
T991021.PU DATES as c3
from RD_Grant.PU_DATES T991021, Dimension -----Huge
PU_Grant.PU_FACTS_9 T991020 FACT ----Gigantic
where (T991020.COMPANY = T991021.COMPANY
and T991020.DATES = T991021.DATES
and T991020.DATES between "10/10/2009" and "31/10/2009"
and T991021.DAYOFWEEK = 'Sunday'
and T991021.DATES between '09/13/2009' and '11/03/2009')
group by T991021.PU DATES, T991021.DAYOFWEEK
Basically I am still thinking of finding a way to force the query to scan the dimension table first (with the filter condition I defined, it will return 80 rows only from Dim table), and then use the result set of the scanning to go and look for matching records only in the fact table. Its should help speed up the query..
Any suggestions?
Thanks
Edited by: user7276913 on Nov 5, 2009 7:07 PM
Edited by: user7276913 on Nov 5, 2009 7:22 PM

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