Re: Identify missing publications from publisher while create/alter subscription.

From: vignesh C <vignesh21(at)gmail(dot)com>
To: Bharath Rupireddy <bharath(dot)rupireddyforpostgres(at)gmail(dot)com>
Cc: Euler Taveira <euler(at)eulerto(dot)com>, Dilip Kumar <dilipbalaut(at)gmail(dot)com>, PostgreSQL Hackers <pgsql-hackers(at)lists(dot)postgresql(dot)org>
Subject: Re: Identify missing publications from publisher while create/alter subscription.
Date: 2021-05-04 13:20:15
Message-ID: CALDaNm38drqAw4j75=EioWum=Net=iwqnfV6BUY6OGz=Scj8kQ@mail.gmail.com
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On Tue, May 4, 2021 at 2:37 PM Bharath Rupireddy
<bharath(dot)rupireddyforpostgres(at)gmail(dot)com> wrote:
>
> On Mon, May 3, 2021 at 7:59 PM vignesh C <vignesh21(at)gmail(dot)com> wrote:
> > Thanks for the comments, these comments are handle in the v7 patch
> > posted in my earlier mail.
>
> Thanks. Some comments on v7 patch:
>
> 1) How about "Add publication names from the list to a string."
> instead of
> * Append the list of publication to dest string.
>

Modified.

> 2) How about "Connect to the publisher and see if the given
> publication(s) is(are) present."
> instead of
> * Connect to the publisher and check if the publication(s) exist.
>

Modified.

> 3) Below comments are unnecessary as the functions/code following them
> will tell what the code does.
> /* Verify specified publication(s) exist in the publisher. */
> /* We are done with the remote side, close connection. */
>
> /* Verify specified publication(s) exist in the publisher. */
> PG_TRY();
> {
> check_publications(wrconn, publications, true);
> }
> PG_FINALLY();
> {
> /* We are done with the remote side, close connection. */
> walrcv_disconnect(wrconn);
> }
>

Modified.

> 4) And also the comment below that's there before check_publications
> is unnecessary, as the function name and description would say it all.
> /* Verify specified publication(s) exist in the publisher. */
>

Modified.

> 5) A typo - it is "do not exist"
> # Multiple publications does not exist.
>

Modified.

> 6) Should we use "m" specified in all the test cases something like we
> do for $stderr =~ m/threads are not supported on this platform/ or
> m/replication slot "test_slot" was not created in this database/?
> $stderr =~
> /ERROR: publication "non_existent_pub" does not exist in the
> publisher/,

Modified.

Thanks for the comments, Attached patch has the fixes for the same.

Regards,
Vignesh

Attachment Content-Type Size
v8-0001-Identify-missing-publications-from-publisher-whil.patch text/x-patch 21.4 KB

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