On Tue, February 19, 2008 3:33 am, Christopher Browne wrote:
> This would be the case where something is updating tuples on the
> origin, and not even actually changing any data.
>
> Thus, perhaps,
>    update table set status = 'done' where created_on > '2007-08-31';
>
> where there are a bunch of tuples with "created_on > '2007-08-31'"
> which have status = 'done' already.

Ah, ok, that makes sense.  Thank you for the clarification.

Regards
Henry