On Wed, 2009-10-28 at 15:31 -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.
AFAIK in-place upgrade is also not quite production-grade, so this was meant as a forward-looking note for next time the hashxxx functions will change. > regards, tom lane -- Hannu Krosing http://www.2ndQuadrant.com PostgreSQL Scalability and Availability Services, Consulting and Training -- Sent via pgsql-hackers mailing list (pgsql-hackers@postgresql.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-hackers
