Re: Adding a pg_get_owned_sequence function?

On Tue, Sep 12, 2023 at 03:53:28PM +0100, Dagfinn Ilmari Mannsåker wrote:
> Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> writes:
>> It's possible that we could get away with just summarily changing
>> the argument type from text to regclass. ISTR that we did exactly
>> that with nextval() years ago, and didn't get too much push-back.
>> But we couldn't do the same for the return type. Also, this
>> approach does nothing for the concern about the name being
>> misleading.
>
> Maybe we should go all the way the other way, and call it
> pg_get_identity_sequence() and claim that "serial" is a legacy form of
> identity columns?

Hm. Could we split it into two functions, pg_get_owned_sequence() and
pg_get_identity_sequence()? I see that commit 3012061 [0] added support
for identity columns to pg_get_serial_sequence() because folks expected
that to work, so maybe that's a good reason to keep them together. If we
do elect to keep them combined, I'd be okay with renaming it to
pg_get_identity_sequence() along with your other proposed changes.

[0] https://postgr.es/m/20170912212054.25640.55202%40wrigleys.postgresql.org

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Nathan Bossart
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