On Tue, Mar 21, 2017 at 10:04 AM, Robert Haas <robertmh...@gmail.com> wrote: > I think that's a good question. I previously expressed similar > concerns. On the one hand, it's hard to ignore the fact that, in the > cases where this wins, it already buys us a lot of performance > improvement. On the other hand, as you say (and as I said), it eats > up a lot of bits, and that limits what we can do in the future. On > the one hand, there is a saying that a bird in the hand is worth two > in the bush. On the other hand, there is also a saying that one > should not paint oneself into the corner.
Are we really saying that there can be no incompatible change to the on-disk representation for the rest of eternity? I can see why that's something to avoid indefinitely, but I wouldn't like to rule it out. -- Peter Geoghegan -- Sent via pgsql-hackers mailing list (firstname.lastname@example.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-hackers