SWITCH:
{
 if (..cond1..) {... last SWITCH};
 if (..cond2..) {
   ... grab one row fetchrow_hashref ..populate field names..
   do {..code
     last if blah;
      ...code...   
   } while (condX);
 last SWITCH
};
 if (..cond3..) {... last SWITCH};
}