resolve_geo_location(1) immutable lut function

init.sql

@@ -23,6 +23,16 @@ create index if not exists idx_training_data_t on training_data(t);
 create index if not exists idx_training_data_training_id on training_data(training_id);
 create index if not exists idx_training_data_geog on training_data using GIST(geog);
 
+create or replace function resolve_geo_location(geography) returns text as $$
+begin 
+	case when st_dwithin($1, st_point(45.516114, 9.216108), 500) then
+			return 'Bicocca';
+	else
+		return 'unknown';
+	end case;
+end
+$$ language plpgsql immutable;
+
 create or replace view training_duration as
 (
 select