Re: POC: GROUP BY optimization
От | Andres Freund |
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Тема | Re: POC: GROUP BY optimization |
Дата | |
Msg-id | 20190131112407.zpbysdvghjyh4z47@alap3.anarazel.de обсуждение исходный текст |
Ответ на | Re: POC: GROUP BY optimization (Dmitry Dolgov <9erthalion6@gmail.com>) |
Ответы |
Re: POC: GROUP BY optimization
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Список | pgsql-hackers |
On 2018-11-29 17:56:53 +0100, Dmitry Dolgov wrote: > > On Tue, Oct 2, 2018 at 4:16 AM Michael Paquier <michael@paquier.xyz> wrote: > > > > On Sat, Jun 30, 2018 at 09:19:13AM +1200, Gavin Flower wrote: > > > Additionally put an upper limit threshold on the number of combinations to > > > check, fairly large by default? > > > > > > If first threshold is exceeded, could consider checking out a few more > > > selected at random from paths not yet checked, to avoid any bias caused by > > > stopping a systematic search. This might prove important when N! is fairly > > > large. > > > > Please note that the latest patch available does not apply, so this has > > been moved to next CF 2018-11, waiting for input from its author. > > Unfortunately, patch still has some conflicts, could you please rebase it? As nothing has happened since, I'm marking this as returned with feedback. Greetings, Andres Freund
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