You can use Long type as primary key.

On Dec 12, 3:27 am, Hershiv Haria <[email protected]> wrote:
> Hi all,
>
> I understand this is a relatively basic question, but I have been
> searching around and can't find an answer that explains it. According
> tohttp://www.datanucleus.org/products/accessplatform/jdo/types.html
> there shouldn't be any problem with using an int as a PK, but when I
> use it in my app it throws the following exception:
>
> Error in meta-data for my.syncdroidserver.Box.boxID: Unsupported
> primary key type: int
>
> I'd like to know why I can't use ints and any ideas of what else to
> use. I'd like to stick with simple types such as ints as the id is
> going to be used as an index in arrays.
>
> Thanks,
>
> Hershiv

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