On Fri, Feb 29, 2008 at 9:15 AM, Tom Lane <tgl@sss.pgh.pa.us> wrote:
>
>
> We've heard that idea before, and it's just as bad as it was when
> proposed before. "Pre-frozen" tuples eliminate any possibility of
> tracking when a tuple was inserted; which is extremely important to know
> when you are trying to do forensic analysis of a broken table. The
> point of the current design is to not throw away information about tuple
> insertion time until the tuple is old enough that the info is (probably)
> not interesting anymore.
>
Understood. But if we consider a special case of creation and loading
of a table in a single transaction, we can possibly save the information
that the table was loaded with pre-frozen tuples with xmin equals to the
transaction creating the table.
Thanks,
Pavan
--
Pavan Deolasee
EnterpriseDB http://www.enterprisedb.com