Fact vertical capabilities - Full outer Join - How to?

Question

Hi,
I have the same problem described in another post: Forcing full outer join between two facts according to common dimensions
I will use the same example:
Let's assume 2 fact tables F1 and F2 and 2 dimension D1 and D2.
Fi is joined to Dj thanks to IDs.
F1 and F2 have got aggregates sum(mes1), respectively sum(mes2).
The group by is performed on dim1 for D1 and dim2 for D2.
The following 2 queries work fine...but separately:
select dim1, dim2, sum(mes1) from F1, D1, D2 where ... group by dim1, dim2; //7 lines
select dim1, dim2, sum(mes2) from F2, D1, D2 where ... group by dim1, dim2; //8 lines
When I try to select dim1, dim2, sum(mes1) and sum(mes2), the following sql is created by the BI server:
WITH SAWITH0 AS (
select dim1, dim2, sum(mes1) c3 from F1, D1, D2 where ... group by dim1, dim2
), SAWITH1 AS (
select dim1, dim2, sum(mes2) c3 from F2, D1, D2 where ... group by dim1, dim2
select ... dim1,
... dim2,
... SAWITH0.c3,
... SAWITH1.c3
FROM SAWITH0 LEFT OUTER JOIN SAWITH1
on SAWITH0.dim1=SAWITH1.dim1 and SAWITH0.dim2=SAWITH1.dim2
I get only 7 lines. It means I miss one line from the second query on F2.
The solution is to perform a full outer join between both queries..
The reply was a link to fact vertical capabilities of OBIEE
(http://gerardnico.com/wiki/dat/obiee/logical_sql/obiee_full_outer_join)
(http://gerardnico.com/wiki/dat/obiee/bi_server/design/obiee_densification_design_preservation_dimension)
In this post the solution is to add a dummy fact table to force a crossjoin.
This solution don't work in my case because I don't need to return all the members of the dimension, I just need to return the dimension member that are joined to both facts..
if in the example, the dimension have 20 member with the fact vertical capabilities solution my reports will show 20 rows... and I only want to see 8 rows...
Any Idea?
Thanks...

Answer 1

I found what was the real problem:
I have two diferent physical and logical Facts with 4 common dimensions and 1 dimesion that only affect to the second fact.
In my report I'm filtering for this last dimension so the OBI use this query (the more restrictive) and made a left join with the second result...
The problem is what I need is filter only by the column, but I cant do it because I'm using a column selector and I can't do a FILTER USING statement using a dashboard prompt...
Any Idea?
Thanks