On Wed, 2009-07-22 at 01:06 +0100, Andrew Gierth wrote: > I'm prepared to give slightly more consideration to option #3: make > the new code read the old format as well as the new one. I believe > (though I have not yet tested) that it is possible to reliably > distinguish the two with relatively low overhead, though the overhead > would be nonzero, and do an in-core format conversion (which would > result in writing out the new format if anything changed).
It might be good to have a way to ensure that all values have been upgraded to the new format. Otherwise you have to permanently maintain the old format even across multiple upgrades. Maybe that's not a big deal, but I thought I'd bring it up. Regards, Jeff Davis -- Sent via pgsql-hackers mailing list (pgsql-hackers@postgresql.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-hackers