Re: DOC: fixes multiple errors in alter table doc

From: Robert Treat <rob(at)xzilla(dot)net>
To: Chao Li <li(dot)evan(dot)chao(at)gmail(dot)com>
Cc: Fujii Masao <masao(dot)fujii(at)gmail(dot)com>, Postgres hackers <pgsql-hackers(at)lists(dot)postgresql(dot)org>
Subject: Re: DOC: fixes multiple errors in alter table doc
Date: 2026-03-03 04:41:13
Message-ID: CAJSLCQ3h6fyMNaH1PnUPXRTdkkH+3+ctEogG4YUWY+XtQUKH6g@mail.gmail.com
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On Mon, Mar 2, 2026 at 9:09 PM Chao Li <li(dot)evan(dot)chao(at)gmail(dot)com> wrote:
> > On Mar 2, 2026, at 17:22, Chao Li <li(dot)evan(dot)chao(at)gmail(dot)com> wrote:
> >> On Mar 2, 2026, at 17:04, Fujii Masao <masao(dot)fujii(at)gmail(dot)com> wrote:
> >> On Thu, Jan 22, 2026 at 6:38 PM Chao Li <li(dot)evan(dot)chao(at)gmail(dot)com> wrote:
> >>> PFA v3: Rebased, and added reviewer and discussion information.
> >>
> >> LGTM.
> >>
> >> Should we apply the same change to the ALTER FOREIGN TABLE docs as well?
> >
> > Sure, I can make the change.
> >
> >>
> >> While reviewing that section, I noticed that ADD COLUMN IF NOT EXISTS appears
> >> to work for ALTER FOREIGN TABLE, but it isn't documented. I'm not sure why
> >> it was left out, but perhaps we should document it and add a regression test in
> >> a separate patch?
> >>
> >
> > I will verify that, then update the doc and regression test accordingly.
> >
> > Best regards,
> > --
> > Chao Li (Evan)
> > HighGo Software Co., Ltd.
> > https://www.highgo.com/
> >
>
> PFA v4:
>
> 0001 - alter table related changes
>
> * Add test cases for omitting COLUMN of ALTER TABLE ADD/DROP [COLUMN]
> * Add a test case for ADD COLUMN IF NOT EXIST (already had DROP COLUMN IF EXIST)
>
> 0002 - alter foreign table related changes
>
> * doc: Add IF NOT EXSTS for ADD COLUMN
> * doc: Mark COLUMN as optional for ADD/DROP COLUMN in the same way as 0001
> * Add test cases for omitting COLUMN of ALTER FOREIGN TABLE ADD/DROP [COLUMN]
> * Add a test cases for for ADD COLUMN IF NOT EXIST
> * Add a test cases for for DROP COLUMN IF EXIST
>

LGTM, although I was curious why you went with c12 vs c11 in
+ALTER FOREIGN TABLE ft1 ADD c12 integer; -- omit COLUMN
or maybe that should be changed?

Robert Treat
https://xzilla.net

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