SELECT a FROM A a LEFT JOIN a.b where ...

SELECT a FROM A a LEFT JOIN a.b where a.b_id = b.id(+)

SELECT a FROM where a.b.id > 5

SELECT a.* FROM A b cross join B b where b.id > 5

SQL Error: 25156, SQLState: 99999
ORA-25156: old style outer join (+) cannot be used with ANSI joins

SELECT alarm FROM Alarm as a LEFT JOIN alarm.madeBy as user where user.name = 'George' and a.source.name = 'UFO'

FROM Alarms a, Users u cross join Sources s where a.user_id = u.user_id(+) and a.source_id = s.source_id and u.name = 'George' and s.name = 'UFO'

@Entity
@Table(name = 'Alarms')
public class Alarm {
   @Id
   private BigDecimial id;

   @ManyToOne
   @JoinColumn(name = "user_id")
   private User madeBy;

   @ManyToOne
   @JoinColumn(name = "source_id")
   private Source source;
}

<property name="hibernate.dialect">org.hibernate.dialect.Oracle9Dialect</property>