columns(['id', 'bound_south_lat', 'bound_west_lng', 'bound_north_lat', 'bound_east_lng']); $result = $select->execute(); while ($map = $result->fetch(IResultSet::FETCH_ASSOC)) { $bounds = Bounds::createDirectly($map['bound_south_lat'], $map['bound_west_lng'], $map['bound_north_lat'], $map['bound_east_lng']); $modify = new Modify(\Container::$dbConnection, 'maps'); $modify->setId($map['id']); $modify->set('area', $bounds->calculateApproximateArea()); $modify->save(); }