On Tue, Dec 1, 2009 at 5:15 PM, Greg Stark <gsst...@mit.edu> wrote: > On Tue, Dec 1, 2009 at 9:58 PM, decibel <deci...@decibel.org> wrote: >> What happened to the work that was being done to allow a page to be upgraded >> on the fly when it was read in from disk? > > There were no page level changes between 8.3 and 8.4.
That's true, but I don't think it's the full and complete answer to the question. Zdenek submitted a page for CF 2008-11 which attempted to add support for multiple page versions. I guess we're on v4 right now, and he was attempting to add support for v3 pages, which would have allowed reading in pages from old PG versions. To put it bluntly, the code wasn't anything I would have wanted to deploy, but the reason why Zdenek gave up on fixing it was because several community members considerably senior to myself provided negative feedback on the concept. ...Robert -- Sent via pgsql-hackers mailing list (pgsql-hackers@postgresql.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-hackers