public void testPKOnlySelectByExampleNoCriteria() {
SqlSession sqlSession = sqlSessionFactory.openSession();
try {
PkonlyMapper mapper = sqlSession.getMapper(PkonlyMapper.class);
PkonlyKey key = new PkonlyKey();
key.setId(1);
key.setSeqNum(3);
mapper.insert(key);
key = new PkonlyKey();
key.setId(5);
key.setSeqNum(6);
mapper.insert(key);
key = new PkonlyKey();
key.setId(7);
key.setSeqNum(8);
mapper.insert(key);
PkonlyExample example = new PkonlyExample();
example.createCriteria();
List<PkonlyKey> answer = mapper.selectByExample(example);