One thing you might consider would be to carry two timestamps in your POJO(s). One old_ts and one new_ts. Selects or read DAOs could populate both. Updates would use new_ts in the SET clause, and old_ts in the WHERE clause. Clients should never change the old_ts.
Yes, all these posts do answer my question. And, agree with Clinton Begin as
he said - "there is no magic there..."
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