Re: Logical Replication of sequences

Dilip Kumar <dilipbalaut@gmail.com>

From: Dilip Kumar <dilipbalaut@gmail.com>

To: Amit Kapila <amit.kapila16@gmail.com>

Cc: "Zhijie Hou (Fujitsu)" <houzj.fnst@fujitsu.com>, "Hayato Kuroda (Fujitsu)" <kuroda.hayato@fujitsu.com>, vignesh C <vignesh21@gmail.com>, Peter Smith <smithpb2250@gmail.com>, shveta malik <shveta.malik@gmail.com>, Shlok Kyal <shlok.kyal.oss@gmail.com>, Chao Li <li.evan.chao@gmail.com>, Masahiko Sawada <sawada.mshk@gmail.com>, Nisha Moond <nisha.moond412@gmail.com>, Peter Eisentraut <peter@eisentraut.org>, PostgreSQL Hackers <pgsql-hackers@lists.postgresql.org>, Euler Taveira <euler@eulerto.com>, Michael Paquier <michael@paquier.xyz>, "Jonathan S. Katz" <jkatz@postgresql.org>

Date: 2025-10-14T11:37:46Z

Lists: pgsql-hackers

Commits

Same data as JSON: GET /api/v1/messages/:b64id/commits the thread's linked commits as JSON, with link sources. API reference →

Doc: Add documentation for sequence synchronization.
- 55cefadde874 19 (unreleased) landed
Remove unused assignment in CREATE PUBLICATION grammar.
- bfb7419b0bbe 19 (unreleased) landed
Add seq_sync_error_count to subscription statistics.
- f6a4c498dcf6 19 (unreleased) landed
Fix few issues in commit 5509055d69.
- 5a4eba558aa7 19 (unreleased) landed
Add sequence synchronization for logical replication.
- 5509055d6956 19 (unreleased) landed
Add worker type argument to logical replication worker functions.
- 3e8e05596a02 19 (unreleased) landed
Introduce "REFRESH SEQUENCES" for subscriptions.
- f0b3573c3aac 19 (unreleased) landed
Refactor logical worker synchronization code into a separate file.
- 41c674d2e31e 19 (unreleased) landed
Standardize use of REFRESH PUBLICATION in code and messages.
- 2436b8c047ff 19 (unreleased) landed
Add "ALL SEQUENCES" support to publications.
- 96b378497346 19 (unreleased) landed
Expose sequence page LSN via pg_get_sequence_data.
- b93172ca59f4 19 (unreleased) landed
Resume conflict-relevant data retention automatically.
- 0d48d393d465 19 (unreleased) cited
Post-commit review fixes for 228c370868.
- 1f7e9ba3ac4e 19 (unreleased) cited
Generate GUC tables from .dat file
- 63599896545c 19 (unreleased) cited

On Tue, Oct 14, 2025 at 3:36 PM Amit Kapila <amit.kapila16@gmail.com> wrote:

0001 and 0002 looks good, except this duplicate version checking code below
in fetch_relation_list [1][2], I mean check_relkind and sequence fetching
both are related changes and start from version 19, so we can do a single
check.  Instead of the 'check_relkind' variable name we can change it to
'support_relkind_seq' or something like that and then we can use this in
both checks.


[1]
+ bool check_relkind = (server_version >= 190000);
+ int column_count = check_columnlist ? (check_relkind ? 4 : 3) : 2;


[2]
+ /* From version 19, inclusion of sequences in the target is supported */
+ if (server_version >= 190000)
+ appendStringInfo(&cmd,
+ "UNION ALL\n"
+ "  SELECT DISTINCT s.schemaname, s.sequencename, NULL::int2vector AS
attrs, " CppAsString2(RELKIND_SEQUENCE) "::\"char\" AS relkind\n"
+ "  FROM pg_catalog.pg_publication_sequences s\n"
+ "  WHERE s.pubname IN (%s)",
+ pub_names->data);


-- 
Regards,
Dilip Kumar
Google