On Sun, Dec 31, 2023 at 02:08:41AM +0100, Tomas Vondra wrote: > I'm not sure. I think the current behavior is (still) wrong - I just > rediscovered it during testing BRIN. I haven't checked, but I guess GIN > is still affected too. > > What's not clear to me is if this is merely cosmetic issue (making > pg_class data confusing for people), or if it has some practical impact. > And I'm not sure there's a good way to improve this, except for some > basic guesswork. For BRIN I can imagine simply calculating the number of > page ranges (relpages / pages_per_range), but no idea about GIN.
FWIW, this area of the code rings a few bells: https://www.postgresql.org/message-id/17787-b2dbe62bdfabd...@postgresql.org https://www.postgresql.org/message-id/17205-42b1d8f131f0c...@postgresql.org -- Michael
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