SqlSession sqlSession = sqlSessionFactory.openSession();
try {
FieldsonlyMapper mapper = sqlSession.getMapper(FieldsonlyMapper.class);
Fieldsonly record = new Fieldsonly();
record.setDoublefield(1.23);
record.setFloatfield(4.35);
record.setIntegerfield(9);
mapper.insert(record);
record = new Fieldsonly();
record.setDoublefield(11.2233);
record.setFloatfield(44.3355);
record.setIntegerfield(99);
mapper.insert(record);
List<Fieldsonly> records = mapper.selectAll();
assertEquals(2, records.size());