Hi All, I have created a simple java application running on glassfish and using a hibernate as a persistence provider on PostgreSQL. I just simply insert display and delete rows from a table. Everything worked fine but when I use partitioning on tables as described at http://www.postgresql.org/docs/8.2/static/ddl-partitioning.html The application started to report every insert to the table as "Transaction marked for rollback" and throwing an exception javax.persistence.OptimisticLockException: org.hibernate.StaleStateException: Batch update returned unexpected row count from update [0]; actual row count: 0; expected: 1 at org.hibernate.ejb.AbstractEntityManagerImpl.wrapStaleStateException(AbstractEntityManagerImpl.java:654) at org.hibernate.ejb.AbstractEntityManagerImpl.throwPersistenceException(AbstractEntityManagerImpl.java:600) at org.hibernate.ejb.AbstractEntityManagerImpl$1.beforeCompletion(AbstractEntityManagerImpl.java:525) .... (plenty of more lines) Caused by: org.hibernate.StaleStateException: Batch update returned unexpected row count from update [0]; actual row count: 0; expected: 1 at org.hibernate.jdbc.Expectations$BasicExpectation.checkBatched(Expectations.java:61) at org.hibernate.jdbc.Expectations$BasicExpectation.verifyOutcome(Expectations.java:46) at org.hibernate.jdbc.BatchingBatcher.checkRowCounts(BatchingBatcher.java:68) at org.hibernate.jdbc.BatchingBatcher.doExecuteBatch(BatchingBatcher.java:48) at org.hibernate.jdbc.AbstractBatcher.executeBatch(AbstractBatcher.java:246) at org.hibernate.engine.ActionQueue.executeActions(ActionQueue.java:237) at org.hibernate.engine.ActionQueue.executeActions(ActionQueue.java:141) at org.hibernate.event.def.AbstractFlushingEventListener.performExecutions(AbstractFlushingEventListener.java:298) at org.hibernate.event.def.DefaultFlushEventListener.onFlush(DefaultFlushEventListener.java:27) at org.hibernate.impl.SessionImpl.flush(SessionImpl.java:1000) at org.hibernate.impl.SessionImpl.managedFlush(SessionImpl.java:338) at org.hibernate.ejb.AbstractEntityManagerImpl$1.beforeCompletion(AbstractEntityManagerImpl.java:516) ... 50 more This is due that Statement.executeBatch returns the incorrect number of rows affected by the transaction. This number returned by PostgreSQL is defined at http://www.postgresql.org/docs/8.2/static/rules-status.html Since the rule system in general is too complex in PostgreSQL it is not possible to define the command status string so it would contain the number of rows affected by the transaction. I think that JDBC driver should return Statement.SUCCESS_NO_INFO in this case, however, it is not doing so now and the JDBC spec does not allow to return Statement.SUCCESS_NO_INFO in Statement.executeUpdate. I had a look at hibernate source where there are couple of "Expectations" implementations but I have not found how it is possible to choose different implementation in my application. A workaround for this could be that I can use Expectation.NONE as an "Expectations" instance. Is it possible to set this up in an application code/configuration? I have not found anything like this in documentation. Thanks for your comments. Cheers Julo