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Introduce "REFRESH SEQUENCES" for subscriptions.

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This patch adds support for a new SQL command:
ALTER SUBSCRIPTION ... REFRESH SEQUENCES
This command updates the sequence entries present in the
pg_subscription_rel catalog table with the INIT state to trigger
resynchronization.

In addition to the new command, the following subscription commands have
been enhanced to automatically refresh sequence mappings:
ALTER SUBSCRIPTION ... REFRESH PUBLICATION
ALTER SUBSCRIPTION ... ADD PUBLICATION
ALTER SUBSCRIPTION ... DROP PUBLICATION
ALTER SUBSCRIPTION ... SET PUBLICATION

These commands will perform the following actions:
Add newly published sequences that are not yet part of the subscription.
Remove sequences that are no longer included in the publication.

This ensures that sequence replication remains aligned with the current
state of the publication on the publisher side.

Note that the actual synchronization of sequence data/values will be
handled in a subsequent patch that introduces a dedicated sequence sync
worker.

Author: Vignesh C <vignesh21@gmail.com>
Reviewed-by: Amit Kapila <amit.kapila16@gmail.com>
Reviewed-by: shveta malik <shveta.malik@gmail.com>
Reviewed-by: Masahiko Sawada <sawada.mshk@gmail.com>
Reviewed-by: Hayato Kuroda <kuroda.hayato@fujitsu.com>
Reviewed-by: Dilip Kumar <dilipbalaut@gmail.com>
Reviewed-by: Peter Smith <smithpb2250@gmail.com>
Reviewed-by: Nisha Moond <nisha.moond412@gmail.com>
Reviewed-by: Shlok Kyal <shlok.kyal.oss@gmail.com>
Reviewed-by: Chao Li <li.evan.chao@gmail.com>
Reviewed-by: Hou Zhijie <houzj.fnst@fujitsu.com>
Discussion: https://postgr.es/m/CAA4eK1LC+KJiAkSrpE_NwvNdidw9F2os7GERUeSxSKv71gXysQ@mail.gmail.com
This commit is contained in:
Amit Kapila
2025-10-23 08:30:27 +00:00
parent 6ae08d9583
commit f0b3573c3a
19 changed files with 609 additions and 141 deletions
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2
src/backend/replication/logical/tablesync.c
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@@ -840,7 +840,7 @@ fetch_remote_table_info(char *nspname, char *relname, LogicalRepRelation *lrel,
/*
* We don't support the case where the column list is different for
* the same table when combining publications. See comments atop
* fetch_table_list. So there should be only one row returned.
* fetch_relation_list. So there should be only one row returned.
* Although we already checked this when creating the subscription, we
* still need to check here in case the column list was changed after
* creating the subscription and before the sync worker is started.