how to change I/O field to radio button?

HI, experts

Now I'm learning ABAP successful SAP and person 1 question that I cannot solve.

first, make I/O tract with SDYN_CONN successful surface painter

As we tin spot successful the SPFLI transparent table, determination are AA, AZ, DL and different datas successful CARRID tract which is aforesaid arsenic SDYN_CONN-CARRID(Airline tract successful screen)

And I privation to alteration this tract to vigor fastener with fewer datas from SPFLI.

I delete the I/O tract successful surface creator and make vigor fastener from surface element.

but present I person to constitute travel logic for these vigor buttons. I thought I request to make CASE connection and constitute SELECT connection for each button's relation codification to get due information from SPFLI. Below codification is what I thought.

I deliberation this is small soiled and dilatory logic due to the fact that for each button, programme request to entree DB to get data. I deliberation this occupation could beryllium solved with interior tables but I truly don't cognize however to constitute logic. 

Could you assistance me?