"P.V. Subramanian" <pvsmian@hotmail.com> writes:
> If some records have been updated or added, the app does some work, and
> marks the record as processed.
> Currently anyone updating a record is expected to mark it manually as
> needing processing. Otherwise the application doesn't know.
> Is there a better, more user friendly way, for the app to automatically find
> out which records have been updated.
You don't need to change the table definition; just add an ON UPDATE
trigger that forces the marking column to be updated.
regards, tom lane