Stored Procedure Keys

Question

Hi
I have a function in the db which returns an Numeric value after passing an Id (numeric) . how do i create a join in physical Layer as funtion will reutrn a numeric and since it is a function it can return only one coulmn .
is there any way i can keep the id (paramater) in the phycisal layer which i am passing to the function , so that i can neccasy join in the physical layer with fact/Dim to the Stored procedure .
is the possible to create mutiple stored procedure in Physical if my function return only one column.
Regards
Riyaz

Answer 1

If I understood your question correctly you have a function that returns a numeric value based on an ID, let's call it Customer ID as a sample. What you need to do is to create a view like this:
CREATE VIEW OUTSTANDING AS
SELECT CUSTOMER_ID, get_outstanding(CUSTOMER_ID) FROM CUSTOMER
You can then query this view like this:
SELECT * FROM OUTSTANDING WHERE CUSTOMER_ID = 999
You could also use this view in your physical layer and join it by Customer ID. If you already have a fact table you could put a view on top to add the extra column with your function. This is all good and should work fine with one caveat. Execution PL/SQL functions on SQL is not efficient. Oracle has to change the context between PL/SQL and SQL for each row and context switching is an expensive operation. In a proper DWH system you will pre-populate your facts table with the results of get_outstanding for all customers so that there is not delay in calculating it when OBIEE queries the data.