Re: Add two missing tests in 035_standby_logical_decoding.pl

Amit Kapila <amit.kapila16@gmail.com>

From: Amit Kapila <amit.kapila16@gmail.com>
To: "Drouvot, Bertrand" <bertranddrouvot.pg@gmail.com>
Cc: Alvaro Herrera <alvherre@alvh.no-ip.org>, vignesh C <vignesh21@gmail.com>, PostgreSQL Hackers <pgsql-hackers@lists.postgresql.org>
Date: 2023-04-27T09:54:43Z
Lists: pgsql-hackers
On Thu, Apr 27, 2023 at 1:05 PM Drouvot, Bertrand
<bertranddrouvot.pg@gmail.com> wrote:
>
> On 4/27/23 5:37 AM, Amit Kapila wrote:
> > On Wed, Apr 26, 2023 at 4:41 PM Drouvot, Bertrand
> > <bertranddrouvot.pg@gmail.com> wrote:
> >
> > +When in recovery, the default value of target_lsn is $node->lsn('replay')
> > +instead. This is needed when the publisher passed to
> > wait_for_subscription_sync()
> > +is a standby node.
> >
> > I think this will be useful whenever wait_for_catchup has been called
> > for a standby node (where self is a standby node). I have tried even
> > by commenting wait_for_subscription_sync in the new test then it fails
> > for $node_standby->wait_for_catchup('tap_sub');. So instead, how about
> > a comment like: "When in recovery, the default value of target_lsn is
> > $node->lsn('replay') instead which ensures that the cascaded standby
> > has caught up to what has been replayed on the standby."?
> >
>
> I did it that way because wait_for_subscription_sync() was the first case I had
> to work on but I do agree that your wording better describe the intend of the new
> code.
>
> Changed in V7 attached.
>

Pushed.

-- 
With Regards,
Amit Kapila.



Commits

  1. Fix the race condition in the test case added by commit a6e04b1d20.

  2. Test that invalidated logical slots doesn't retain WAL.

  3. Add a test to verify that subscription to the standby works.

  4. Reduce the log level in 035_standby_logical_decoding.pl.