[OJB-developers] MySQL question with OJB

[David F. <dw...@la...>]

My application runs fine with hsqldb under ojb-.0.8.400
When I try using mysql, I get the error message:

[ojb.broker.accesslayer.RsIterator] ERROR: null

in every query.

In addition, I see in some cases an 
[ojb.broker.singlevm.PersistenceBrokerImpl] ERROR: expected interface 
gov.lanl.COAS.ObservationValue_

and there is an ojb.brokerPersistentBrokerSQLException thrown in 
materializeObject.

the class listed above is in a ReferenceDescriptor for a polymorphic object.

I don't see any observable errors when I load the database.

I don't understand why mysql should behave differently from hsqldb.
Is something else needed for ojb with mysql to be able to handle 
polymorphic objects?

Thanks,

Dave