example.createCriteria().andIntegerfieldGreaterThan(5);
int rows = mapper.updateByExampleSelective(record, example);
assertEquals(2, rows);
example.clear();
example.createCriteria().andIntegerfieldEqualTo(5);
List<Fieldsonly> answer = mapper.selectByExample(example);
assertEquals(1, answer.size());
record = answer.get(0);
assertEquals(record.getDoublefield(), 11.22, 0.0);