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From: Arvind Raghuwanshi <arvindcs28@gmail.com>
Date: Tue, 9 Apr 2024 17:37:01 +0530
Message-ID: <CAEmgyXWS2EyKRR5sJ9Nj5b7fXsaveqrdKMzSNe22cF5u0AOVHA@mail.gmail.com>
Subject: Re: Regarding: Replication of TRUNCATE commands is not working
To: Laurenz Albe <laurenz.albe@cybertec.at>
Cc: pgsql-general@lists.postgresql.org
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Hi Laurenz,
Thanks for the response
Question: What PostgreSQL version are you using?  The feature was
introduced in v11.
Answer: I am using the 16.0 Postgresql version.
db1=3D> SELECT version();
                                               version
---------------------------------------------------------------------------=
--------------------------
 PostgreSQL 16.0 on x86_64-pc-linux-gnu, compiled by gcc (Ubuntu
7.5.0-3ubuntu1~18.04) 7.5.0, 64-bit
(1 row)

Question: How exactly is the publication defined?  Perhaps TRUNCATE is
excluded.
I am not using the subscribe/publication model . but i have created a
replication slot on the source database and then i am calling below
procedure to get the details from replication slot:
select data from pg_logical_slot_peek_changes('db1_slot', NULL, NULL,
'pretty-print', '1');

In the case of TRUNCATE , the above procedure does not show up any records.
however this procedure shows up insert, update and delete events.

As you mentioned TRUNCATE is excluded, is there any way to exclude
TRUNCATE ?

Thanks
Arvind

On Tue, Apr 9, 2024 at 4:08=E2=80=AFPM Laurenz Albe <laurenz.albe@cybertec.=
at>
wrote:

> On Tue, 2024-04-09 at 14:50 +0530, Arvind Raghuwanshi wrote:
> > I have tried to run the TRUNCATE command  and found out that it's not
> getting replicated using logical replication for pgsql.
> > I have also checked the schema change using pg_dump command but the
> schema change also not getting detected for TRUNCATE command.
> >
> > However on pgsql logical replication doc page[1] , it's mentioned
> that Replication of TRUNCATE commands is supported.
> >
> > [1] PostgreSQL: Documentation: 16: 31.6. Restrictions
> >
> > Any idea how we can solve this?
>
> What PostgreSQL version are you using?  The feature was introduced in v11=
.
> How exactly is the publication defined?  Perhaps TRUNCATE is excluded.
>
> Yours,
> Laurenz Albe
>

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<div dir=3D"ltr"><div dir=3D"ltr"><div dir=3D"ltr"><div dir=3D"ltr"><div di=
r=3D"ltr"><div dir=3D"ltr">Hi Laurenz,</div><div>Thanks for the response</d=
iv><div dir=3D"ltr">Question: What PostgreSQL version are you using?=C2=A0 =
The feature was introduced in v11.<br><div>Answer: I am using the 16.0 Post=
gresql version.</div><div><div>db1=3D&gt; SELECT version();</div><div>=C2=
=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =
=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=
=A0 =C2=A0 =C2=A0version</div><div>----------------------------------------=
-------------------------------------------------------------</div><div>=C2=
=A0PostgreSQL 16.0 on x86_64-pc-linux-gnu, compiled by gcc (Ubuntu 7.5.0-3u=
buntu1~18.04) 7.5.0, 64-bit</div><div>(1 row)</div></div><div><br></div><di=
v>Question: How exactly is the publication defined?=C2=A0 Perhaps TRUNCATE =
is excluded.</div><div>I am not using the subscribe/publication model . but=
 i have created a replication slot on the source database and then i am cal=
ling below procedure to get the details from replication slot:</div><div>se=
lect data from pg_logical_slot_peek_changes(&#39;db1_slot&#39;, NULL, NULL,=
 &#39;pretty-print&#39;, &#39;1&#39;);<br></div><div><br></div><div>In the =
case of TRUNCATE , the above procedure does not show up any records. howeve=
r this procedure shows up insert, update and delete events.</div><div><br><=
/div><div>As you mentioned TRUNCATE is excluded, is there any way to exclud=
e TRUNCATE=C2=A0?</div><div><br></div><div>Thanks</div><div>Arvind</div></d=
iv></div></div></div></div></div><br><div class=3D"gmail_quote"><div dir=3D=
"ltr" class=3D"gmail_attr">On Tue, Apr 9, 2024 at 4:08=E2=80=AFPM Laurenz A=
lbe &lt;<a href=3D"mailto:laurenz.albe@cybertec.at">laurenz.albe@cybertec.a=
t</a>&gt; wrote:<br></div><blockquote class=3D"gmail_quote" style=3D"margin=
:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"=
>On Tue, 2024-04-09 at 14:50 +0530, Arvind Raghuwanshi wrote:<br>
&gt; I have tried to run the TRUNCATE command=C2=A0 and found out that it&#=
39;s not getting replicated using logical replication for pgsql.<br>
&gt; I have also checked the schema change using pg_dump command but the sc=
hema change also not getting detected for TRUNCATE command.<br>
&gt; <br>
&gt; However on pgsql logical replication doc page[1] , it&#39;s mentioned =
that=C2=A0Replication of TRUNCATE commands is supported.<br>
&gt; <br>
&gt; [1]=C2=A0PostgreSQL: Documentation: 16: 31.6.=C2=A0Restrictions<br>
&gt; <br>
&gt; Any idea how we can solve=C2=A0this?<br>
<br>
What PostgreSQL version are you using?=C2=A0 The feature was introduced in =
v11.<br>
How exactly is the publication defined?=C2=A0 Perhaps TRUNCATE is excluded.=
<br>
<br>
Yours,<br>
Laurenz Albe<br>
</blockquote></div>

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