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Re: Non-superuser subscription owners

Jeff Davis <pgsql@j-davis.com>

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From: Jeff Davis <pgsql@j-davis.com>
To: Amit Kapila <amit.kapila16@gmail.com>
Cc: Mark Dilger <mark.dilger@enterprisedb.com>, Andrew Dunstan <andrew@dunslane.net>, PostgreSQL-development <pgsql-hackers@postgresql.org>, Robert Haas <robertmhaas@gmail.com>
Date: 2021-11-25T20:06:36Z
Lists: pgsql-hackers 
On Thu, 2021-11-25 at 09:51 +0530, Amit Kapila wrote:
> Won't it be better to just check if the current user is superuser
> before applying each change as a matter of this first patch? Sorry, I
> was under impression that first, we want to close the current gap
> where we allow to proceed with replication if the user's superuser
> privileges were revoked during replication.

That could be a first step, and I don't oppose it. But it seems like a
very small first step that would be made obsolete when v3-0001 is
ready, which I think will be very soon.

>  To allow non-superusers
> owners, I thought it might be better to first try to detect the
> change
> of ownership

In the case of revoked superuser privileges, there's no change in
ownership, just a change of privileges (SUPERUSER -> NOSUPERUSER). And
if we're detecting a change of privileges, why not just do it in
something closer to the right way, which is what v3-0001 is attempting
to do.

>  as soon as possible instead of at the transaction
> boundary.

I don't understand why it's important to detect a loss of privileges
faster than a transaction boundary. Can you elaborate?

Regards,
	Jeff Davis

Commits

Same data as JSON: GET /api/v1/messages/:b64id/commits the thread's linked commits as JSON, with link sources. API reference →

  1. Fix possible crash in tablesync worker.

  2. Display 'password_required' option for \dRs+ command.

  3. Restart the apply worker if the 'password_required' option is changed.

  4. Fix possible logical replication crash.

  5. Add new predefined role pg_create_subscription.

  6. Expand AclMode to 64 bits

  7. More cleanup of a2ab9c06ea.

  8. Respect permissions within logical replication.

  9. Improve table locking behavior in the face of current DDL.