code for customer exit variable in sap bi report ?

Hi,

I need to use a customer exit variable reading from a custom table, from a list of values. That is instead of giving the value in the global filter selection of a query, we need to use a customer exit to read from a custom variable and execute the report only for those values in the table.

I have searched and could not find any doc for the same. Can any abap/bi expert, please provide me a link or code to use for the customer exit variable. Hope I am clear.

Please let me know if you need more details.

thank you

DR