key.setId(new Integer(7));
key.setSeqNum(new Integer(8));
dao.insert(key);
PkonlyExample example = new PkonlyExample();
example.createCriteria()
.andIdEqualTo(new Integer(7));
key = new PkonlyKey();
key.setSeqNum(new Integer(3));
key.setId(new Integer(22));
int rows = dao.updateByExample(key, example);