On 4/27/23 11:54 AM, Amit Kapila wrote:
On Thu, Apr 27, 2023 at 1:05 PM Drouvot, Bertrand
<bertranddrouvot...@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...@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.


Thanks!

Regards,

--
Bertrand Drouvot
PostgreSQL Contributors Team
RDS Open Source Databases
Amazon Web Services: https://aws.amazon.com


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