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From: Tom Lane <[email protected]>
To: Karsten Hilbert <[email protected]>
Cc: [email protected]
Cc: pgsql-general <[email protected]>
Subject: Re: unique constraint violation on multiple-rows update
Date: Sun, 19 Apr 2026 11:17:47 -0400
Message-ID: <[email protected]> (raw)
In-Reply-To: <[email protected]>
References: <[email protected]>
	<[email protected]>
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	<[email protected]>

Karsten Hilbert <[email protected]> writes:
> Am Sun, Apr 19, 2026 at 06:54:02AM -0700 schrieb David G. Johnston:
>> You know about deferred constraints, you should use them here.  This is one
>> of the key use cases motivating their existence.

> Indeed. I was of the mistaken impression that UNIQUE
> constraints were not deferrable ...

Once upon a time they were not, but we fixed that years ago.

			regards, tom lane

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