On 23 April 2017 at 03:37, Bruce Momjian <br...@momjian.us> wrote: > In looking at the new multi-column statistics "dependency" option in > Postgres 10, I am quite confused by the term "dependency". Wouldn't > "correlation" be clearer and less confusing as "column dependency" > already means something else. >
Actually, the terms "dependency" and "correlation" are both quite broad terms that cover a whole range of other different things, and hence could be misleading. The precise term for this is "functional dependency" [1], so if anything, the option name should be "functional_dependencies" or some shortening of that, keeping a part of each of those words. Regards, Dean [1] https://en.wikipedia.org/wiki/Functional_dependency -- Sent via pgsql-hackers mailing list (pgsql-hackers@postgresql.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-hackers
