Julien Rouhaud <rjuju...@gmail.com> writes: > On Sun, Aug 21, 2022 at 11:02:04PM +0000, PG Doc comments form wrote: >> It appears the above sentence is referring to the "(1 - sum(mvf))" portion >> of the formula, however I am not sure what "mvf" is referring to >> there...shouldn't it be "(1 - sum(mcv))" in order to match what the >> explanatory sentence is saying?
> It should be mcf, ie. Most Common Frequencies. It looks like a very old typo > that survived until now. I don't think it's a typo exactly, but an odd abbreviation for "Most common Values' Frequencies". (Summing the MCVs themselves isn't sensible; they might not even be numeric.) I'd vote for replacing mvf in both places with something a bit more spelled-out, perhaps "mcv_freqs". regards, tom lane