code: @Override
      protected int onExecuteUpdate()
      {
          EntityMetadata m = getEntityMetadata();
  
          Client client = persistenceDelegeator.getClient(m);
          return ((HibernateClient) client).onExecuteUpdate(getJPAQuery(), getParamaters(), firstResult, maxResult);
      }
docs: /*
  (non-Javadoc)
  
  @see com.impetus.kundera.query.QueryImpl#onExecuteUpdate()