Question

I want to update a specific field in the database Persons table by using HibernateTemplate. I am trying to do like this but this not working.

public void  updateDate(int Id,Date receivedDate) {
      Id = 10;
      receivedDate = 2012-11-12;
      String queryString = "update Persons set recievedDate=? where Id=? ";
      getHibernateTemplate().update(queryString, new Object[] { Id, receivedDate });
}

I am getting an exception “UnkownEntity” when I run this query. Can I do update of a specific field at all by using HibernateTemplate? Is there any other alternate to do specific field update?

Answer 1

update method in getHibernateTemplate does not allow hql query to execute. It only allows hibernate entity object.

See link hibernate template update method

In your case Hibernate tries to resolve update Persons set recievedDate=? where Id=? as an entity.

Solution:

Query q = s.createQuery("update Persons set recievedDate=:recievedDate where Id=:Id");
q.setString("recievedDate", "some date");
q.setString("Id", "54");
q.executeUpdate();

Hope its clear.