dao.insert(record);
PkblobsWithBLOBs newRecord = new PkblobsWithBLOBs();
newRecord.setId(3);
newRecord.setBlob2(generateRandomBlob());
dao.updateByPrimaryKeySelective(newRecord);
PkblobsKey key = new PkblobsKey();
key.setId(3);
PkblobsWithBLOBs returnedRecord = dao.selectByPrimaryKey(key);