Problem with inserting into table that has autogenerated primary key

hi
i am working on EJB3.
i am trying to insert object into table.Primary key of table will be generated automatically.I tried following statement for insertion,
em.persistent(customerObj);
but it throw following exception,
javax.ejb.EJBException: javax.persistence.PersistenceException: org.hibernate.id.IdentifierGenerationException: ids for this class must be manually assigned before calling save(): customer.CustomerInfo
     at org.jboss.ejb3.tx.Ejb3TxPolicy.handleExceptionInOurTx(Ejb3TxPolicy.java:69)
     at org.jboss.aspects.tx.TxPolicy.invokeInOurTx(TxPolicy.java:83)
     at org.jboss.aspects.tx.TxInterceptor$Required.invoke(TxInterceptor.java:191)
     at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:101)
     at org.jboss.aspects.tx.TxPropagationInterceptor.invoke(TxPropagationInterceptor.java:76)
     at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:101)
     at org.jboss.ejb3.stateless.StatelessInstanceInterceptor.invoke(StatelessInstanceInterceptor.java:62)
     at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:101)
     at org.jboss.aspects.security.AuthenticationInterceptor.invoke(AuthenticationInterceptor.java:77)
     at org.jboss.ejb3.security.Ejb3AuthenticationInterceptor.invoke(Ejb3AuthenticationInterceptor.java:102)
     at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:101)
     at org.jboss.ejb3.ENCPropagationInterceptor.invoke(ENCPropagationInterceptor.java:47)
     at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:101)
     at org.jboss.ejb3.asynchronous.AsynchronousInterceptor.invoke(AsynchronousInterceptor.java:106)
     at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:101)
     at org.jboss.ejb3.stateless.StatelessContainer.localInvoke(StatelessContainer.java:211)
     at org.jboss.ejb3.stateless.Stateles
can anyone tell me is there any other way to acheive the same.
i thought of doing using insert query,but i am not sure about the syntax to be used.
could anyone help me ?
thanks in advance...

That's why you should use PreparedStatement instead of Statement. Its setString() method will escape that value for you properly when you bind it.
%

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at org.hibernate.persister.entity.AbstractEntityPersister.insert(AbstractEntityPersister.java:2108)
at org.hibernate.persister.entity.AbstractEntityPersister.insert(AbstractEntityPersister.java:2588)
at org.hibernate.action.EntityIdentityInsertAction.execute(EntityIdentityInsertAction.java:48)
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I've also tested this using eclipselink and got same error.
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Thanks

Hello,
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You can also try working around the problem by making both fields writable through the reference mapping.
Best Regards,
Chris

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but still getting the ORA-06502. Would really appreciate some advice here, please.
Cheers
KIM

Scott,
Time to 'fess up':
My fault sorry, the error was coming from another page process where I had allowed insufficient string length for one of the variables, and my error message did not identify the page process clearly.
This leads me to make a request for future releases, could the system error messages state which page process caused the problem?
One other thing I notice, and this might be a feature not a fault, the page processes are numbered: "Page Process: 3 of 5". However process 3 is not the 3rd one to be processed, and probably refers to the order in which they are created. Should the number reflect the process order?
Cheers
KIM

Problem with inserting into table that has autogenerated primary key

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