Re: PATCH: add support for IN and @> in functional-dependencystatistics use
От | Tomas Vondra |
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Тема | Re: PATCH: add support for IN and @> in functional-dependencystatistics use |
Дата | |
Msg-id | 20200317170517.hutarq3sioyny3wa@development обсуждение исходный текст |
Ответ на | Re: PATCH: add support for IN and @> in functional-dependencystatistics use (Dean Rasheed <dean.a.rasheed@gmail.com>) |
Ответы |
Re: PATCH: add support for IN and @> in functional-dependencystatistics use
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Список | pgsql-hackers |
On Tue, Mar 17, 2020 at 04:14:26PM +0000, Dean Rasheed wrote: >On Tue, 17 Mar 2020 at 15:37, Tomas Vondra <tomas.vondra@2ndquadrant.com> wrote: >> >> On Tue, Mar 17, 2020 at 12:42:52PM +0000, Dean Rasheed wrote: >> >> >The other thing that I'm still concerned about is the possibility of >> >returning estimates with P(a,b) > P(a) or P(b). I think that such a >> >thing becomes much more likely with the new types of clause supported >> >here, because they now allow multiple values from each column, where >> >before we only allowed one. I took another look at the patch I posted >> >on the other thread, and I've convinced myself that it's correct. >> >Attached is an updated version, with some cosmetic tidying up and now >> >with some additional regression tests. >> >> Yeah, I agree that's something we need to fix. Do you plan to push the >> fix, or do you want me to do it? >> > >I can push it. Have you had a chance to review it? > Not yet, I'll take a look today. regards -- Tomas Vondra http://www.2ndQuadrant.com PostgreSQL Development, 24x7 Support, Remote DBA, Training & Services
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