Business layer

Hi,

I tried an adding to an SQL Query as new column obj in the derived table. Now already my DF has the some structure and universe has been already designed on top of it and created business layer also.

I can do changes to the fields present in DF layer. Now how do i reflect the same changes in fields either new addition/ removal of object from the Business Layer as Business layer creates folder as classes and objects automatically only once..

Thanks,

Dinya