local formulaes and selections in BO

Hello Experts,

I have a very complex query to be designed in bex, which is furthur used in BO. The Bex query has lot of RKF,s and CKF,s to be defined so it is reacing SAP limit of 999 elements. If i use formulaes in place of RKF;s and CKF's, can i access them in BO Xi 3.1. If so, could you let me know the process.

Thanks

Prashanth