Problem with ROUND function on H2 database

[PaulN Pearson]

Has anyone come across the following problem in JPA/Hibernate/Spring:

I have a persisted instance of a class MyClass which contains a Float instance variable, f, mapped to a database FLOAT type (either Oracle or H2). The value of f is 123.456.

I execute the following code:

 
public void readObjects() {
   final String sql = "SELECT myClass FROM MyClass myClass WHERE ROUND(myClass.f, 3) = ?1";
   List<MyClass> resultList = (List<MyClass>) getJpaTemplate().execute(new JpaCallback() {
      public Object doInJpa(EntityManager em) throws PersistenceException {
         Query query = em.createQuery(sql);
         query.setParameter(1, new Float(123.456));
         return query.getResultList();
      }
   });
   System.out.println(resultList.size());
}

Which prints "1" when run with an Oracle database (which is what I would expect), but "0" with H2.

What's more, on H2, when I remove the ROUND function and just query on "myClass.f = ?1" I get one result as expected, which suggests ROUND is the problem. But also when I leave ROUND there, and hardcode the parameter ?1 as "123.456" I also get one result, which suggests it's the setting of the parameter that's the problem!!!

Can anyone enlighten me as to what's going wrong here?