}
@Test
public void test_integer_object_column() {
dao.insert(PetObj.create("X"));
PetObj pet = dao.fetch(PetObj.class, "X");
assertEquals("X", pet.getName());
assertNull(pet.getAge());
dao.update(pet.setAge(20));
pet = dao.fetch(PetObj.class, "X");
assertEquals(20, pet.getAge().intValue());
dao.update(pet.setAge(null));
pet = dao.fetch(PetObj.class, "X");
assertNull(pet.getAge());
}