Re: Logical Replication of sequences

shveta malik <shveta.malik@gmail.com>

From: shveta malik <shveta.malik@gmail.com>

To: Amit Kapila <amit.kapila16@gmail.com>, vignesh C <vignesh21@gmail.com>

Cc: Masahiko Sawada <sawada.mshk@gmail.com>, "Hayato Kuroda (Fujitsu)" <kuroda.hayato@fujitsu.com>, "Zhijie Hou (Fujitsu)" <houzj.fnst@fujitsu.com>, Dilip Kumar <dilipbalaut@gmail.com>, Peter Smith <smithpb2250@gmail.com>, Shlok Kyal <shlok.kyal.oss@gmail.com>, Chao Li <li.evan.chao@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>, shveta malik <shveta.malik@gmail.com>

Date: 2025-10-22T05:31:40Z

Lists: pgsql-hackers

Commits

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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 Wed, Oct 22, 2025 at 10:36 AM Amit Kapila <amit.kapila16@gmail.com> wrote:
>
>
> I think the case where both WARNINGs will be displayed is rare so it
> should be okay as it simplifies the code quite a bit. Another thing is
> we need to query twice but as this happens during DDL and only for
> very specific cases that should also be okay. We can anyway merge
> these later if we see any problem with it but for now it would be
> better to prefer code simplicity.
>

+1

Few trivial comments on 001:

1)
In fetch_relation_list(), I feel support_relkind is misleading as now
we are unconditionally supporting fetching relkind once the version >=
16. We can make the function work without having this variable.

2)
+ * Build qsorted array of local relation oids for faster lookup. This
+ * can potentially contain all relation in the database so speed of
+ * lookup is important.

Since we are building multiple arrays now, we can change comment to:
Build qsorted arrays of local table oids and sequence oids for faster
lookup. This can potentially contain all tables and sequences in the
database so speed of lookup is important.

thanks
Shveta