Re: unique constraint violation on multiple-rows update

From: Karsten Hilbert <Karsten(dot)Hilbert(at)gmx(dot)net>
To: pgsql-general(at)lists(dot)postgresql(dot)org, pgsql-general <pgsql-general(at)postgresql(dot)org>
Subject: Re: unique constraint violation on multiple-rows update
Date: 2026-04-19 14:09:18
Message-ID: aeTiDr-FDOg_z7Wh@hermes.hilbert.loc
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Am Sun, Apr 19, 2026 at 06:54:02AM -0700 schrieb David G. Johnston:

> > > Running that does violate the (non-deferred) UNIQUE
> > > constraint on the table column, however.
>
> 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 ...

:-)

Works, thanks,
Karsten
--
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