On Wed, Sep 10, 2014 at 4:48 AM, Fabien COELHO <coe...@cri.ensmp.fr> wrote: > Note I did not start with the non uniform stuff, but Mitsumasa-san sent a > gaussian distribution patch and I jumped onto the wagon to complement it > with an exponential distribution patch. I knew when doing it that is was not > enough, but as I said "one piece at a time", given the effort required to > pass simple patch. > > What is still needed for the overall purpose is the ability to scatter the > distribution. This is really: > > (1) a positive remainder modulo, which is the trivial patch under > discussion > > (2) a fast but good quality for the purpose hash function > also a rather small patch, not submitted yet. > > (3) maybe the '|' operator to do a TP*-like non-uniform load, > which is really periodic so I do not like it. > a trivial patch, not submitted yet. > > If you do not want one of these pieces (1 & 2), basically the interest of > gaussian/exponential addition is much reduced, and this is just a half baked > effort aborted because you did not want what was required to make it useful. > Well, I can only disagree, but you are a committer and I'm not!
I am not objecting to the functionality; I'm objecting to bolting on ad-hoc operators one at a time. I think an expression syntax would let us do this in a much more scalable way. If I had time, I'd go do that, but I don't. We could add abs(x) and hash(x) and it would all be grand. -- Robert Haas EnterpriseDB: http://www.enterprisedb.com The Enterprise PostgreSQL Company -- Sent via pgsql-hackers mailing list (pgsql-hackers@postgresql.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-hackers
