FieldsonlyMapper mapper = sqlSession.getMapper(FieldsonlyMapper.class);
Fieldsonly record = new Fieldsonly(5, 11.22, 33.44);
mapper.insert(record);
FieldsonlyExample example = new FieldsonlyExample();
example.createCriteria().andIntegerfieldEqualTo(5);
List<Fieldsonly> answer = mapper.selectByExample(example);
assertEquals(1, answer.size());
Fieldsonly returnedRecord = answer.get(0);