To my knowledge, Oracle and Informix both have facilities, albeit under
different names. I believe they called them "SEQUENCE" data types or something
like that.
DB2, on the other hand, doesn't, AFAIK.
Good luck,
-Ron
--- "John M. Jones" <[EMAIL PROTECTED]> wrote:
> Does your database support serial fields? These fields generate a counter
> for each record added. There's a trick to getting the next id when calling
> create(), but it eliviates coding a unique id generator. I use PostgreSQL,
> and it has a serial data type.
>
> Hope this helps,
> John
>
> -----Original Message-----
> From: [EMAIL PROTECTED]
> [mailto:[EMAIL PROTECTED]]On Behalf Of Blasius Lofi
> Dewanto
> Sent: Thursday, June 15, 2000 5:13 AM
> To: [EMAIL PROTECTED]
> Subject: Automatic counter
>
>
> Hi all,
>
> I just wonder, whether someone can help me...
>
> How can I implement a counter or a unique id
> for my PrimaryKey in EJB? Because I don't want
> to take care about it in my EJB.
>
> Another question:
> When I quit from the EJBServer through the JonasAdmin,
> I always get this exception:
> Cannot unbind Datasources: java.lang.ClassCastException
> Is this normal?
>
> Thank's a lot!
> --
> ---------------------------------------------------
> Blasius Lofi Dewanto
> ---------------------------------------------------
> OpenUSS - Open Source University Support System
> http://openuss.sourceforge.net
> ---------------------------------------------------
>
>
> __________________________________________________________________
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