| From: | Greg Stark <stark(at)mit(dot)edu> |
|---|---|
| To: | Andy Fan <zhihui(dot)fan1213(at)gmail(dot)com> |
| Cc: | Dmitry Dolgov <9erthalion6(at)gmail(dot)com>, David Rowley <dgrowleyml(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>, Masahiko Sawada <sawada(dot)mshk(at)gmail(dot)com>, Ashutosh Bapat <ashutosh(dot)bapat(dot)oss(at)gmail(dot)com>, Heikki Linnakangas <hlinnaka(at)iki(dot)fi>, "Hou, Zhijie" <houzj(dot)fnst(at)cn(dot)fujitsu(dot)com>, Floris Van Nee <florisvannee(at)optiver(dot)com> |
| Subject: | Re: Keep notnullattrs in RelOptInfo (Was part of UniqueKey patch series) |
| Date: | 2022-03-31 20:33:20 |
| Message-ID: | CAM-w4HP=BsfBb=r1bKU4aC3eV5w-=3Gu6hfo8SrMNZZP5uMDbw@mail.gmail.com |
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| Lists: | pgsql-hackers |
On Mon, 22 Nov 2021 at 02:14, Andy Fan <zhihui(dot)fan1213(at)gmail(dot)com> wrote:
>
> _I_ think there is no way to bypass that. I guess Tom has a bigger plan on
> Var (not only for notnull), but no time to invest in them so far. If
> that is the case,
> personally I think we can go ahead with my method first and continue the review
> process.
This discussion has gone on for two years now and meandered into
different directions. There have been a number of interesting
proposals and patches in that time but it's not clear now what patch
is even under consideration and what questions remain for it. And I
think this message from last November is the last comment on it so I
wonder if it's reached a bit of an impasse.
I think I would suggest starting a fresh thread with a patch distilled
from the previous discussions. Then once that's settled repeat with
additional patches, keeping the discussion focused just on the current
change.
Personally I think these kinds of optimizations are important because
they're what allow people to use SQL without micro-optimizing each
query.
--
greg
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