| From: | Andy Fan <zhihui(dot)fan1213(at)gmail(dot)com> |
|---|---|
| To: | Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> |
| Cc: | David Rowley <dgrowleyml(at)gmail(dot)com>, PostgreSQL Hackers <pgsql-hackers(at)lists(dot)postgresql(dot)org>, Masahiko Sawada <sawada(dot)mshk(at)gmail(dot)com>, Dmitry Dolgov <9erthalion6(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: | 2021-07-07 01:03:59 |
| Message-ID: | CAKU4AWoH2gLyK-ot7-YuXKbxmAWGoVsqGonH6e2noXM7Uib=6w@mail.gmail.com |
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| Lists: | pgsql-hackers |
On Tue, Jul 6, 2021 at 9:14 PM Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> wrote:
> David Rowley <dgrowleyml(at)gmail(dot)com> writes:
> > Tom, I'm wondering if you might get a chance to draw up a design for
> > what you've got in mind with this? I assume adding a new field in
> > Var, but I'm drawing a few blanks on how things might work for equal()
> > when one Var has the field set and another does not.
>
> As I said before, it hasn't progressed much past the handwaving stage,
> but it does seem like it's time to get it done. I doubt I'll have any
> cycles for it during the commitfest, but maybe I can devote a block of
> time during August.
>
> regards, tom lane
>
Looking forward to watching this change closely, thank you both David and
Tom!
But I still don't understand what the faults my way have , do you mind
telling the
details?
--
Best Regards
Andy Fan (https://www.aliyun.com/)
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