Should A repository call another repository? Or should a repository call a service layer?

Question

I am trying to figure out how to tackle this problem. I have to insert some data into 2 tables lets call them Table A and Table B.

Table A has these columns
         


        

Answer 1

The guard clause (param1 != "hi") should be in a higher layer, such as an application service layer.

The service layer should coordinate the two repositories.