String query = "SELECT t.name FROM CarType t "
                + "WHERE EXISTS ( "
                    + "SELECT car.id FROM Car car "
                    + "WHERE car.type = t "
                    + "AND NOT EXISTS ( SELECT r.id FROM Reservation r "
                        + "WHERE r IN (car.reservations) "
                        /*+ "AND ( (r.startDate > :start AND r.startDate < :end) "
                            + "OR (r.endDate > :start AND r.endDate < :end) "
                            + "OR (r.startDate <= :start AND r.endDate >= :end) "
                        + ") "*/
                    + ") "
                + ") "
                + "ORDER BY t.rentalPricePerDay ASC";