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In-Reply-To: 
 <CAJpy0uBE65YAkAQ+q75b3WZteAZszeRgsQifTsJTb0JDsNQTSw@mail.gmail.com>
From: shveta malik <shveta.malik@gmail.com>
Date: Tue, 22 Jul 2025 15:57:34 +0530
Message-ID: 
 <CAJpy0uCjAvaGn5y_48MR=DHahoB36VpqK6RkMryLKYBU+YHE5g@mail.gmail.com>
Subject: Re: Skipping schema changes in publication
To: Shlok Kyal <shlok.kyal.oss@gmail.com>
Cc: Peter Smith <smithpb2250@gmail.com>,
 Amit Kapila <amit.kapila16@gmail.com>,
	"Zhijie Hou (Fujitsu)" <houzj.fnst@fujitsu.com>,
 vignesh C <vignesh21@gmail.com>, YeXiu <1518981153@qq.com>,
	Ian Lawrence Barwick <barwick@gmail.com>,
	Bharath Rupireddy <bharath.rupireddyforpostgres@gmail.com>,
	PostgreSQL Hackers <pgsql-hackers@lists.postgresql.org>,
 shveta malik <shveta.malik@gmail.com>
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Archived-At: 
 <https://www.postgresql.org/message-id/CAJpy0uCjAvaGn5y_48MR%3DDHahoB36VpqK6RkMryLKYBU%2BYHE5g%40mail.gmail.com>
Precedence: bulk

Shlok, I was trying to validate the interaction of
'publish_via_partition_root' with 'EXCEPT". Found some unexpected
behaviour, can you please review:

Pub:
---------
CREATE TABLE tab_root (range_col int,i int,j int) PARTITION BY RANGE
(range_col);
CREATE TABLE tab_part_1 PARTITION OF tab_root FOR VALUES FROM (1) to (1000);
CREATE TABLE tab_part_2 PARTITION OF tab_root FOR VALUES FROM (1000) to (2000);
create publication pub2 for all tables except tab_part_2 WITH
(publish_via_partition_root=true);

Sub (tables without partition):
--------
CREATE TABLE tab_root (range_col int,i int,j int);
CREATE TABLE tab_part_1(range_col int,i int,j int);
CREATE TABLE tab_part_2(range_col int,i int,j int);
create subscription sub2 connection '...' publication pub2;

Pub:
--------
insert into tab_part_2 values(1001,1,1);

On Sub, the above row is replicated as expected in tab_root due to
publish_via_partition_root=true on pub.

Now on Pub:
--------
alter publication pub2 set (publish_via_partition_root=false);
insert into tab_part_2 values(1002,2,2);

Now with publish_via_partition_root=false and 'except tab_part_2', the
above row is correctly ignored and not replicated on sub.

But when I try this:
insert into tab_part_1 values(1,1,1);
insert into tab_root values(5,5,5);

Expectation was that the above rows are replicated but that is not the
case. Can you please review? Please let me know if my understanding is
wrong.

thanks
Shveta