Re: Allow foreign keys to reference a superset of unique columns

From: Peter Eisentraut <peter(dot)eisentraut(at)enterprisedb(dot)com>
To: Kaiting Chen <ktchen14(at)gmail(dot)com>, Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>
Cc: pgsql-hackers(at)postgresql(dot)org, hellopfm(at)gmail(dot)com
Subject: Re: Allow foreign keys to reference a superset of unique columns
Date: 2022-10-06 12:39:51
Message-ID: 0b3366f5-43dd-76da-50a9-733687c6f8db@enterprisedb.com
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On 28.09.22 00:39, Kaiting Chen wrote:
> What other semantics and edge cases regarding this proposal should I
> consider?

I'm not as pessimistic as others that it couldn't be made to work. But
it's the job of this proposal to figure this out. Implementing it is
probably not that hard in the end, but working out the specification in
all details is the actual job.

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