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From: Tom Lane <[email protected]>
To: David G. Johnston <[email protected]>
Cc: Simon Riggs <[email protected]>
Cc: PostgreSQL Hackers <[email protected]>
Subject: Re: Dump/Restore of non-default PKs
Date: Mon, 18 Apr 2022 16:48:07 -0400
Message-ID: <[email protected]> (raw)
In-Reply-To: <CAKFQuwbZcudqgSCwM4rKoOfs1AbjN3ssPXv6yqmABGitk2CBwg@mail.gmail.com>
References: <CANbhV-GdnAc-fpUvtkwJ5+YGoKYVOmTUQp9k1A4ODo=bdJ-Oww@mail.gmail.com>
	<CAKFQuwbZcudqgSCwM4rKoOfs1AbjN3ssPXv6yqmABGitk2CBwg@mail.gmail.com>

"David G. Johnston" <[email protected]> writes:
> On Mon, Apr 18, 2022 at 1:00 PM Simon Riggs <[email protected]>
> wrote:
>> I propose that we change pg_dump so that when it creates a PK it does
>> so in 2 commands:
>> 1. CREATE [UNIQUE] INDEX iname ...
>> 2. ALTER TABLE .. ADD PRIMARY KEY USING INDEX iname;

> Why not just get rid of the limitation that constraint definitions don't
> support non-default methods?

That approach would be doubling down on the assumption that we can always
shoehorn more custom options into SQL-standard constraint clauses, and
we'll never fall foul of shift/reduce problems or future spec additions.
I think for example that USING INDEX TABLESPACE is a blot on humanity,
and I'd be very glad to see pg_dump stop using it in favor of doing
things as Simon suggests.

			regards, tom lane






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