@Bean
@Order(0)
public class MyHybridSqlService implements ISqlService{
...
  public ...select(){
     if(it_is_a_workday){
          return     BEANS.get(MyPostgresSqlServiceA.class).select....
     }
     else{
          return     BEANS.get(MyPostgresSqlServiceB.class).select....
     }
  }
}