Re: Skipping schema changes in publication

From: Nisha Moond <nisha(dot)moond412(at)gmail(dot)com>
To: Shlok Kyal <shlok(dot)kyal(dot)oss(at)gmail(dot)com>
Cc: Amit Kapila <amit(dot)kapila16(at)gmail(dot)com>, vignesh C <vignesh21(at)gmail(dot)com>, shveta malik <shveta(dot)malik(at)gmail(dot)com>, Ashutosh Sharma <ashu(dot)coek88(at)gmail(dot)com>, "David G(dot) Johnston" <david(dot)g(dot)johnston(at)gmail(dot)com>, Dilip Kumar <dilipbalaut(at)gmail(dot)com>, Peter Smith <smithpb2250(at)gmail(dot)com>, "Zhijie Hou (Fujitsu)" <houzj(dot)fnst(at)fujitsu(dot)com>, YeXiu <1518981153(at)qq(dot)com>, Ian Lawrence Barwick <barwick(at)gmail(dot)com>, Bharath Rupireddy <bharath(dot)rupireddyforpostgres(at)gmail(dot)com>, PostgreSQL Hackers <pgsql-hackers(at)lists(dot)postgresql(dot)org>
Subject: Re: Skipping schema changes in publication
Date: 2026-03-03 10:15:19
Message-ID: CABdArM7EigxxYREK4nskcfk6XX1nm4ARDhOJtxnfxQ47hF9i_w@mail.gmail.com
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On Mon, Mar 2, 2026 at 6:51 PM Shlok Kyal <shlok(dot)kyal(dot)oss(at)gmail(dot)com> wrote:
>
> Attached the updated v54 patch.
>

Few comments for v54 patch -
1) The partition description shows the publication name which it is
excluded from.
simple test case:

CREATE TABLE t_part (a int) PARTITION BY RANGE(a);
CREATE TABLE t_part_p1 PARTITION OF t_part FOR VALUES FROM (0) TO (100);
CREATE PUBLICATION pub_p1 FOR ALL TABLES EXCEPT TABLE (t_part);
postgres=# \d t_part_p1
Table "public.t_part_p1"
Column | Type | Collation | Nullable | Default
--------+---------+-----------+----------+---------
a | integer | | |
Partition of: t_part FOR VALUES FROM (0) TO (100)
Publications:
"pub_p1"
~~~

2) File: 037_rep_changes_except_table.pl:147
+# Verify that data inserted into a table listed in the EXCEPT clause is not
+# published.
+$result = $node_publisher->safe_psql('postgres',
+ "SELECT count(*) = 0 FROM
pg_logical_slot_get_binary_changes('test_slot', NULL, NULL,
'proto_version', '1', 'publication_names', 'tap_sub_schema')"
+);

There seems to be a mistake in the publication name in the above call
as tap_sub_schema is a subscription name.
~~~
Couple of minor comments:
3) File: pgouput.c
+ /*
+ * For a parition, changes are published via top-most
+ * ancestor when pubviaroot is true, so populate pub_relid
+ * accordingly
+ */

3a) typo parition -> partition
3b) There should be a full stop (.) at the end i.e. after accordingly
~~~

File: pg_publication.c
+ else
+ errormsg = gettext_noop("cannot add relation \"%s\" to publication");
+
+
+ /* If in EXCEPT clause, must be root partitioned table */

>> there is an extra empty line
~~~

--
Thanks,
Nisha

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