Alex Shulgin <alex.shul...@gmail.com> writes: > On Sun, Apr 3, 2016 at 3:43 AM, Alex Shulgin <alex.shul...@gmail.com> wrote: >> I'm not sure yet about the 1% rule for the last value, but would also love >> to see if we can avoid the arbitrary limit here. What happens with a last >> value which is less than 1% popular in the current code anyway?
> Now that I think about it, I don't really believe this arbitrary heuristic > is any good either, sorry. Yeah, it was just a placeholder to produce a working patch. Maybe we could base this cutoff on the stats target for the column? That is, "1%" would be the right number if stats target is 100, otherwise scale appropriately. > What was your motivation to introduce some limit at the bottom anyway? Well, we have to do *something* with the last (possibly only) value. Neither "include always" nor "omit always" seem sane to me. What other decision rule do you want there? regards, tom lane -- Sent via pgsql-hackers mailing list (pgsql-hackers@postgresql.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-hackers