Re: [hibernate-dev] [ORM] Query with condition on subclass attribute
I don't see it documented in the user guide. Is it safe to assume that this
functionality won't be going away?
On Wed, Jul 1, 2020 at 5:11 PM Steve Ebersole wrote:
> It is not portable. Hibernate applies an implicit treat-as operation in
> such cases. This is actually Hibernate's behavior from the beginning. JPA
> says this should use an explicit treat-as operation.
>
> On Wed, Jul 1, 2020, 4:58 PM Gail Badner wrote:
>
>> Hi,
>>
>> Given the following inheritance hierarchy:
>>
>> @Entity
>> public class Person {
>> @Id
>> private int id;
>> ...
>> }
>>
>> @Entity
>> public class Employee extends Person {
>> private String title;
>> }
>>
>> Executing a query like the following succeeds.
>>
>> "from Person where title = 'abc'"
>>
>> I thought that it would fail because Person does not have an attribute
>> named "title". Instead, the query succeeds and returns the Employee with
>> the specified title.
>>
>> I don't see anything in the JPA spec that indicates whether this is
>> portable.
>>
>> Does anyone know if this is portable?
>>
>> Thanks,
>> Gail
>> ___
>> hibernate-dev mailing list
>> hibernate-dev@lists.jboss.org
>> https://lists.jboss.org/mailman/listinfo/hibernate-dev
>>
>>
___
hibernate-dev mailing list
hibernate-dev@lists.jboss.org
https://lists.jboss.org/mailman/listinfo/hibernate-dev
Re: [hibernate-dev] [ORM] Query with condition on subclass attribute
It is not portable. Hibernate applies an implicit treat-as operation in
such cases. This is actually Hibernate's behavior from the beginning. JPA
says this should use an explicit treat-as operation.
On Wed, Jul 1, 2020, 4:58 PM Gail Badner wrote:
> Hi,
>
> Given the following inheritance hierarchy:
>
> @Entity
> public class Person {
> @Id
> private int id;
> ...
> }
>
> @Entity
> public class Employee extends Person {
> private String title;
> }
>
> Executing a query like the following succeeds.
>
> "from Person where title = 'abc'"
>
> I thought that it would fail because Person does not have an attribute
> named "title". Instead, the query succeeds and returns the Employee with
> the specified title.
>
> I don't see anything in the JPA spec that indicates whether this is
> portable.
>
> Does anyone know if this is portable?
>
> Thanks,
> Gail
> ___
> hibernate-dev mailing list
> hibernate-dev@lists.jboss.org
> https://lists.jboss.org/mailman/listinfo/hibernate-dev
>
>
___
hibernate-dev mailing list
hibernate-dev@lists.jboss.org
https://lists.jboss.org/mailman/listinfo/hibernate-dev
[hibernate-dev] [ORM] Query with condition on subclass attribute
Hi,
Given the following inheritance hierarchy:
@Entity
public class Person {
@Id
private int id;
...
}
@Entity
public class Employee extends Person {
private String title;
}
Executing a query like the following succeeds.
"from Person where title = 'abc'"
I thought that it would fail because Person does not have an attribute
named "title". Instead, the query succeeds and returns the Employee with
the specified title.
I don't see anything in the JPA spec that indicates whether this is
portable.
Does anyone know if this is portable?
Thanks,
Gail
___
hibernate-dev mailing list
hibernate-dev@lists.jboss.org
https://lists.jboss.org/mailman/listinfo/hibernate-dev
