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Based on your comments I'm looking at documentation:
I found a Note: A logical key for a fact table must be made up of the key columns that join to the attribute tables. Logical foreign key joins may be needed if the Oracle BI Server is to be used as an ODBC data source for certain third-party query and reporting tools.
I need to see why ODBC, and unlike the Logical Foreign key join is not overriding join Physical layer.
Btw: Since you want to go with a join using defined logical column, can you use the same expression in Physical join using expression builder?
This should work.
EX: T43770.DEPARTMENT_ID = case when T43764.DEPARTMENT_ID > 10 then T43764.DEPARTMENT_ID else 0 end
Edited by: Srini VEERAVALLI on Jan 18, 2013 4:52 PM