RE: Fix a test case in 035_standby_logical_decoding.pl

On Thu, Apr 27, 2023 4:47 PM Drouvot, Bertrand <bertranddrouvot(dot)pg(at)gmail(dot)com> wrote:
>
> Hi,
>
> On 4/27/23 10:11 AM, Yu Shi (Fujitsu) wrote:
> > Hi hackers,
> >
> > In 035_standby_logical_decoding.pl, I think that the check in the following test
> > case should be performed on the standby node, instead of the primary node,
> as
> > the slot is created on the standby node.
>
> Oh right, the current test is not done on the right node, thanks!
>
> > The test currently passes because it
> > only checks the return value of psql. It might be more appropriate to check the
> > error message.
>
> Agree, and it's consistent with what is being done in 006_logical_decoding.pl.
>
> > Please see the attached patch.
> >
>
> +
> +($result, $stdout, $stderr) = $node_standby->psql(
> 'otherdb',
> "SELECT lsn FROM pg_logical_slot_peek_changes('behaves_ok_activeslot',
> NULL, NULL) ORDER BY lsn DESC LIMIT 1;"
> - ),
> - 3,
> - 'replaying logical slot from another database fails');
> + );
> +ok( $stderr =~
> + m/replication slot "behaves_ok_activeslot" was not created in this
> database/,
> + "replaying logical slot from another database fails");
>
>
> That does look good to me.
>
> Nit: I wonder if while at it (as it was already there) we could not remove the "
> ORDER BY lsn DESC LIMIT 1" part of it.
> It does not change anything regarding the test but looks more appropriate to
> me.
>

Thanks for your reply. I agree with you and I removed it in the attached patch.

Regards,
Shi Yu