[hibernate-dev] Strange sequence effect with ORM 5

[Steve Ebersole]

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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