| From: | Etsuro Fujita <etsuro(dot)fujita(at)gmail(dot)com> |
|---|---|
| To: | Thomas Munro <thomas(dot)munro(at)gmail(dot)com> |
| Cc: | Robert Haas <robertmhaas(at)gmail(dot)com>, Amit Langote <Langote_Amit_f8(at)lab(dot)ntt(dot)co(dot)jp>, amul sul <sulamul(at)gmail(dot)com>, Ashutosh Bapat <ashutosh(dot)bapat(dot)oss(at)gmail(dot)com>, Rajkumar Raghuwanshi <rajkumar(dot)raghuwanshi(at)enterprisedb(dot)com>, Etsuro Fujita <fujita(dot)etsuro(at)lab(dot)ntt(dot)co(dot)jp>, Dmitry Dolgov <9erthalion6(at)gmail(dot)com>, Thomas Munro <thomas(dot)munro(at)enterprisedb(dot)com>, Antonin Houska <ah(at)cybertec(dot)at>, PostgreSQL-development <pgsql-hackers(at)postgresql(dot)org> |
| Subject: | Re: [HACKERS] advanced partition matching algorithm for partition-wise join |
| Date: | 2019-07-01 11:16:30 |
| Message-ID: | CAPmGK14-7WNAbxn1j_aYcgm2vWOgYCufUJVDPs1B1P3jHOeEKg@mail.gmail.com |
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| Lists: | pgsql-hackers |
On Mon, Jul 1, 2019 at 6:50 PM Thomas Munro <thomas(dot)munro(at)gmail(dot)com> wrote:
> On Sat, May 18, 2019 at 12:20 AM Robert Haas <robertmhaas(at)gmail(dot)com> wrote:
> > On Tue, May 14, 2019 at 12:24 AM Amit Langote
> > <Langote_Amit_f8(at)lab(dot)ntt(dot)co(dot)jp> wrote:
> > > He did mention that cases where the nullable side is provably empty can be
> > > handled by simply returning the path of the non-nullable side with
> > > suitable projection path added on top to emit NULLs for the columns of the
> > > nullable-side. If we teach populate_joinrel_with_paths() and underlings
> > > about that, then we can allow partitionwise join even in the case where
> > > the nullable side has some partitions missing.
> >
> > Yes, I think that would be a good approach to pursue.
>
> Hi Ashutosh, Amul, Fujita-san,
>
> Could we please have a fresh rebase for the new Commitfest?
Will do unless Ashutosh, Amul, or anyone wants to.
Thanks!
Best regards,
Etsuro Fujita
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