On Thu, Jun 16, 2011 at 21:36, Shaun Thomas <sthomas@xxxxxxxxx> wrote: > You can call that instead of max, and it'll be much faster. You can create > an analog for min if you need it. So for this, you'd call: Cool, I've needed this function sometimes but never bothered enough to write it myself. Now I created a wiki snippet page for this handy feature here: https://wiki.postgresql.org/wiki/Efficient_min/max_over_partitioned_table With Jim Nasby's idea to use regclass instead of relation names, the function is now half its length and probably more reliable. There's no need to touch pg_class directly at all. I also changed it to return bigint instead of integer, as that's more versatile, and the performance loss is probably negligible. Regards, Marti -- Sent via pgsql-performance mailing list (pgsql-performance@xxxxxxxxxxxxxx) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-performance
