create or replace function miles_between_lat_long(
  lat1 numeric, long1 numeric, lat2 numeric, long2 numeric
) returns numeric
language 'plpgsql' as $$
declare
  x numeric = 69.1 * (lat2 - lat1);
  y numeric = 69.1 * (long2 - long1) * cos(lat1/57.3);
begin
   return sqrt(x*x + y*y);
end
$$;
	
