Re: [BUG] autovacuum may skip tables when session_authorization/role is set on database

On Thu, 14 Dec 2023 at 02:13, Imseih (AWS), Sami <simseih(at)amazon(dot)com> wrote:
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> Hi,
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> A recent case in the field in which a database session_authorization is
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> altered to a non-superuser, non-owner of tables via alter database .. set session_authorization ..
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> caused autovacuum to skip tables.
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> The issue was discovered on 13.10, and the logs show such messages:
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> warning: skipping "table1" --- only table or database owner can vacuum it
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> In HEAD, I can repro, but the message is now a bit different due to [1].
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> WARNING: permission denied to vacuum "table1”, skipping it
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> It seems to me we should force an autovacuum worker to set the session userid to
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> a superuser.
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> Attached is a repro and a patch which sets the session user to the BOOTSTRAP superuser
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> at the start of the autovac worker.

Since there is not much interest on this patch, I have changed the
status with "Returned with Feedback". Feel free to propose a stronger
use case for the patch and add an entry for the same.

Regards,
Vignesh