On Wed, Oct 28, 2009 at 03:31:17PM -0400, Tom Lane wrote: > Hannu Krosing <ha...@2ndquadrant.com> writes: > > I had never checked the docs for hash functions, but I had assumed, that > > internal functions are prefixed by pg_ and anything else is public, free > > to use functionality. > > Sure, it's free to use. It's not free to assume that we promise never > to change it. > > > Changing hash functions also makes in-place upgrades a lot harder, as > > they can't be done incrementally anymore for tables which use hash > > indexes. > > Hash indexes are so far from being production-grade that this argument > is not significant. > > regards, tom lane
In addition that change from 8.3 -> 8.4 to store only the hash and not the value in the index means that a reindex would be required in any event. Cheers, Ken -- Sent via pgsql-hackers mailing list (pgsql-hackers@postgresql.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-hackers
