On Mon, 5 Apr 2004, Guido Beutler wrote:

> Hi,
> 
> I use OJB RC6 and DB2. I want to insert a abject into a table with a 
> sequence.
> I  took the settings from documentation and added to database.xml :
> 
>    <sequence-manager 
> className="org.apache.ojb.broker.util.sequence.SequenceManagerNextValImpl">
>      <attribute attribute-name="autoNaming" attribute-value="true"/>
>   </sequence-manager>
> 
> and at the class descriptor :
> 
>       primarykey="true"
>       autoincrement="true"
>       sequence-name="TEST_SEQUENCE"
> 
> OJB still tries to insert the pk field to which causes a SQL exception. 
> DB2 expects that the field is not used
> at the insert statement. DB2 then generates the pk value itself.
> I also tried to leave the sequence name open but this had no effect.
> What am I doing wrong?

How is the field defined in the database ?

I'm no expert on sequence managers, but as far as I understand them, the
difference between SequenceManagerNextValImpl and
SequenceManagerNativeImpl is that for the former, in the database the
field is defined as a normal field (no autoincrement/identity
setting) whereas for the native impl the database increments the field
automatically (without OJB intervening, thus you should have
access='readonly' in this case).

Tom


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