On Sun, Apr 23, 2017 at 10:01:16AM -0400, Bruce Momjian wrote: > On Sun, Apr 23, 2017 at 11:44:12AM +0100, Simon Riggs wrote: > > For us "functional dependency" would sound like something to do with > > functions (e.g. CREATE FUNCTION), so just "dependency" appears to me > > to be the best term for this. > > > > There are multiple statistics for dependency stored, hence > > "dependencies". I don't like it, but its the best term I can see at > > present. > > OK, thank you for the reply, and I am sorry I forgot the previous > discussion. I just wanted to re-check we had research this. Thanks.
(Email subject updated.) Actually, I have a larger question that I was thinking about. Because we already have lots of per-column stats, and now the dependency score, is it possible to mix the per-column stats and dependency score in a way that multi-column frequency/histogram stats are not necessary? That might be a less costly approach I had not considered. Or did I miss that discussion too? ;-) -- Bruce Momjian <br...@momjian.us> http://momjian.us EnterpriseDB http://enterprisedb.com + As you are, so once was I. As I am, so you will be. + + Ancient Roman grave inscription + -- Sent via pgsql-hackers mailing list (pgsql-hackers@postgresql.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-hackers
