@MappedSuperclass
@Entity
@Table(name = "event")
public class EventInfo implements Serializable {
   protected Integer id;
   protected GroupInfo group;
//...
}

@Entity
@Table(name = "event")
public class Event extends EventInfo {
//...
}

"from EventInfo e where e.group.id=:gid ..."

"select new EventInfo(e.id, ...) from Event e ..."

@Basic(fetch = FetchType.LAZY)

q.setResultTransformer(CriteriaSpecification.DISTINCT_ROOT_ENTITY);

Hibernate:
    select
        eventinfo0_.id as id26_,
        eventinfo0_.ending as ending26_,
        eventinfo0_.group_fk as group13_26_,
        eventinfo0_.name as name26_,
        eventinfo0_.starting as starting26_
    from
        se_event eventinfo0_
    where
        eventinfo0_.group_fk=?
        and eventinfo0_.starting>=?
    order by
        eventinfo0_.starting desc
Hibernate:
    select
        event0_.id as id26_,
        event0_.ending as ending26_,
        event0_.group_fk as group13_26_,
        event0_.name as name26_,
        event0_.starting as starting26_,
        event0_.access as access26_,
        event0_.description as descript8_26_,
        event0_.fee as fee26_,
        event0_.limitation as limitation26_,
        event0_.location as location26_,
        event0_.ORGANIZER_FK as ORGANIZER14_26_,
        event0_.status as status26_
    from
        se_event event0_
    where
        event0_.group_fk=?
        and event0_.starting>=?
    order by
        event0_.starting desc