Mondrian Queries on InfoBright

Dear all,

I am facing an issue when using InfoBright Enterprise as datawarehouse. Columnar Databases perfrom very well if they work with sub select, avoiding large dimension join.

Let me explain: fact + product dimensio will cause mondrian to run a query of type

SELECT.. FROM facttable f, producttable p WHERE f.prodId = p.prodId AND p.prodColor = "Red".

Instead would be better to run this query:

SELECT
*
FROM facttable f
WHERE f.prodId IN (SELECT p.prodId FROM producttable p WHERE p.color="RED")

Anyone know how to configure (if possible) this capbility?
Thanks
Roberto