Horton

Re: Allow non-superuser to cancel superuser tasks.

Nathan Bossart <nathandbossart@gmail.com>

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From: Nathan Bossart <nathandbossart@gmail.com>
To: Kirill Reshke <reshkekirill@gmail.com>
Cc: pgsql-hackers@postgresql.org
Date: 2024-02-26T15:10:47Z
Lists: pgsql-hackers 
On Mon, Feb 26, 2024 at 12:38:40PM +0500, Kirill Reshke wrote:
> I see 2 possible ways to implement this. The first one is to have hool in
> pg_signal_backend, and define a hook in extension which can do the thing.
> The second one is to have a predefined role. Something like a
> `pg_signal_autovacuum` role which can signal running autovac to cancel. But
> I don't see how we can handle specific `application_name` with this
> solution.

pg_signal_autovacuum seems useful given commit 3a9b18b.

-- 
Nathan Bossart
Amazon Web Services: https://aws.amazon.com

Commits

  1. Look up backend type in pg_signal_backend() more cheaply.

  2. Add tap test for pg_signal_autovacuum role

  3. Introduce pg_signal_autovacuum_worker.

  4. Add a slot synchronization function.

  5. Ban role pg_signal_backend from more superuser backend types.