[hibernate-dev] Strange sequence effect with ORM 5

[Steve Ebersole]

Well you can do that.  Thats just not historically how Hibernate worked.

Set `prefer_sequence_per_entity` to true

On Fri, Aug 21, 2015 at 10:26 AM Sanne Grinovero <sanne at hibernate.org>
wrote:

> Ok, thanks and sorry I missed this :)
> I was aware that it would switch to sequences rather than identity,
> but I missed that there would be a single Sequence shared among
> types... I still find that a bit surprising as I would expect to
> generally want different sequences for each type.
>
> Thanks,
> Sanne
>
> On 21 August 2015 at 16:21, Steve Ebersole <steve at hibernate.org> wrote:
> > Please see the migration guide and/or blogs :)
> >
> > Yes, we changed the default mapping for how id generators are mapped as
> > discussed extensively on the mail list last month or earlier this month.
> > Essentially we changed the default for
> `hibernate.id.new_generator_mappings`
> > from false to true for 5.0.  For H2, the old mapping would have been an
> > IDENTITY column.  The "new" mapping is the SequenceStyleGenerator.
> >
> >
> >
> > On Fri, Aug 21, 2015 at 10:16 AM Sanne Grinovero <sanne at hibernate.org>
> > wrote:
> >>
> >> Hi all,
> >> after upgrading Hibernate Search to Hibernate ORM 5.0.0.Final we
> >> noticed a small change in behaviour in sequences.
> >>
> >> In a single test we persist two entities of differnent types, Country
> >> and Address, and both types have the id mapped as follows:
> >>
> >>    @Id
> >>    @GeneratedValue
> >>    Long id;
> >>
> >> Previously, when running on H2, the IDs assigned to these two entities
> >> would be respectively 1 and 1.
> >> When upgrading ORM from 5.0.0.CR3 to 5.0.0.Final, the assigned ids are
> >> now 1 and 2.
> >>
> >> Are sequences now being shared by default across unrelated entities?
> >> Is this the new intended default?
> >>
> >> Thanks,
> >> Sanne
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>