(moving to -hackers) On Tue, 13 Jun 2023 at 21:30, Pavel Stehule <pavel.steh...@gmail.com> wrote: > út 13. 6. 2023 v 11:21 odesílatel James Pang (chaolpan) <chaol...@cisco.com> > napsal: >> When join two table on multiple columns equaljoin, rows estimation >> always use selectivity = multiplied by distinct multiple individual columns, >> possible to use extended n-distinct statistics on multiple columns? >> >> PG v14.8-1, attached please check test case with details. > > There is not any support for multi tables statistic
I think it's probably worth adjusting the docs to mention this. It seems like it might be something that could surprise someone. Something like the attached, maybe? David
mention_ext_stats_dont_work_for_joins.patch
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