| From: | Andy Fan <zhihui(dot)fan1213(at)gmail(dot)com> |
|---|---|
| To: | Dmitry Dolgov <9erthalion6(at)gmail(dot)com> |
| Cc: | David Rowley <dgrowleyml(at)gmail(dot)com>, Ashutosh Bapat <ashutosh(dot)bapat(dot)oss(at)gmail(dot)com>, Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>, PostgreSQL Hackers <pgsql-hackers(at)lists(dot)postgresql(dot)org>, Floris Van Nee <florisvannee(at)optiver(dot)com>, "Hou, Zhijie" <houzj(dot)fnst(at)cn(dot)fujitsu(dot)com>, Heikki Linnakangas <hlinnaka(at)iki(dot)fi>, Masahiko Sawada <sawada(dot)mshk(at)gmail(dot)com>, Jesper Pedersen <jesper(dot)pedersen(at)redhat(dot)com> |
| Subject: | Re: UniqueKey on Partitioned table. |
| Date: | 2021-03-27 06:14:25 |
| Message-ID: | CAKU4AWqCxvKT7JUk2evSpnPQZ8KDbqbx7QxxKjx3-zKHCE=aew@mail.gmail.com |
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| Lists: | pgsql-hackers |
On Sat, Mar 27, 2021 at 3:07 AM Dmitry Dolgov <9erthalion6(at)gmail(dot)com> wrote:
> > On Sat, Feb 20, 2021 at 10:25:59AM +0800, Andy Fan wrote:
> >
> > The attached is a UnqiueKey with EquivalenceClass patch, I just complete
> the
> > single relation part and may have bugs. I just attached it here for
> design
> > review only. and the not-null-attrs is just v1 which we can continue
> > discussing on the original thread[2].
>
> Thanks for the patch. After a short look through it I'm a bit confused
> and wanted to clarify, now uniquekeys list could contain both Expr and
> EquivalenceClass?
>
Yes, That's because I don't want to create a new EquivalenceClass (which
would make the PlannerInfo->eq_classes longer) if we don't have
one , then I just used one Expr instead for this case. However during the
test, I found some EquivalenceClass with only 1 EquivalenceMember
unexpectedly.
--
Best Regards
Andy Fan (https://www.aliyun.com/)
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