On Wed, 2009-10-28 at 21:09 +0200, Hannu Krosing wrote: > Is at least the fact that they "are undocumented, have changed in the > past, and are likely to change again in the future" documented ?
That's a little confusing to me: how do we document that something is undocumented? And where do we stop? > Hashing is a quite fundamental thing in computing, so I was quite > surprised to find out it had silently changed. There are many reasons to use a hash, and we don't want people to use these functions for the wrong purpose. I have seen people use a performance hash for security purposes before, and I had to demonstrate some hash collisions to show why that was a bad idea. So, if we do provide documented functions, it should be done carefully. Trying to develop and document a set of standardized, stable hash functions covering a wide range of possible use cases sounds like it may be better served by an extension. 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