if (preg_match('/^[0-9]+$/', $this->sHouseNumber)) {
$sIpolHnr = 'WHERE parent_place_id = sin.place_id ';
$sIpolHnr .= ' AND startnumber is not NULL AND sin.address_rank < 30';
if (preg_match('/^[0-9]+$/', $this->sHouseNumber)) {
$sIpolHnr = 'WHERE parent_place_id = sin.place_id ';
$sIpolHnr .= ' AND startnumber is not NULL AND sin.address_rank < 30';