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base repository: postgresql-cfbot/postgresql
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  • 6 commits
  • 50 files changed
  • 2 contributors

Commits on Apr 28, 2025

  1. Introduce pg_sequence_state function for enhanced sequence management 

    This patch introduces a new function, 'pg_sequence_state', which
allows retrieval of sequence values, including the associated LSN.
    @vigneshwaran-c
    vigneshwaran-c authored and Commitfest Bot committed Apr 28, 2025
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  2. Introduce "ALL SEQUENCES" support for PostgreSQL logical replication 

    This commit enhances logical replication by enabling the inclusion of all
sequences in publications.

Furthermore, enhancements to psql commands now display which
publications contain the specified sequence (\d command), and if a
specified publication includes all sequences (\dRp command).

Note: This patch currently supports only the "ALL SEQUENCES" clause.
Handling of clauses such as "FOR SEQUENCE" and "FOR SEQUENCES IN SCHEMA"
will be addressed in a subsequent patch.
    @vigneshwaran-c
    vigneshwaran-c authored and Commitfest Bot committed Apr 28, 2025
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  3. Reorganize tablesync Code and Introduce syncutils 

    Reorganized the tablesync code by creating a new syncutils file.
This refactoring will facilitate the development of sequence
synchronization worker code.

This commit separates code reorganization from functional changes,
making it clearer to reviewers that only existing code has been moved.
The changes in this patch can be merged with subsequent patches during
the commit process.
    @vigneshwaran-c
    vigneshwaran-c authored and Commitfest Bot committed Apr 28, 2025
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  4. Enhance sequence synchronization during subscription management 

    This patch introduces sequence synchronization:
Sequences have 2 states:
   - INIT (needs synchronizing)
   - READY (is already synchronized)

A new sequencesync worker is launched as needed to synchronize sequences.
It does the following:
    a) Retrieves remote values of sequences with pg_sequence_state() INIT.
    b) Logs a warning if the sequence parameters differ between the publisher and subscriber.
    c) Sets the local sequence values accordingly.
    d) Updates the local sequence state to READY.
    e) Repeats until all done; Commits synchronized sequences in batches of 100

Sequence synchronization occurs in 3 places:
1) CREATE SUBSCRIPTION
    - (PG18 command syntax is unchanged)
    - The subscriber retrieves sequences associated with publications.
    - Published sequences are added to pg_subscription_rel with INIT state.
    - Initiate the sequencesync worker (see above) to synchronize all
      sequences.

2) ALTER SUBSCRIPTION ... REFRESH PUBLICATION
    - (PG18 command syntax is unchanged)
    - Drop published sequences are removed from pg_subscription_rel.
    - Newly published sequences are added to pg_subscription_rel with INIT state.
    - Initiate the sequencesync worker (see above) to synchronize only
      newly added sequences.

3) ALTER SUBSCRIPTION ... REFRESH PUBLICATION SEQUENCES
    - The patch introduces this new command to refresh all sequences
    - Drop published sequences are removed from pg_subscription_rel.
    - Newly published sequences are added to pg_subscription_rel
    - All sequences in pg_subscription_rel are reset to INIT state.
    - Initiate the sequencesync worker (see above) to synchronize all
      sequences.
    @vigneshwaran-c
    vigneshwaran-c authored and Commitfest Bot committed Apr 28, 2025
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  5. Documentation for sequence synchronization feature. 

    Documentation for sequence synchronization feature.
    @vigneshwaran-c
    vigneshwaran-c authored and Commitfest Bot committed Apr 28, 2025
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  6. [CF 5111] v20250428 - Synchronization of sequences to subscriber 

    This branch was automatically generated by a robot using patches from an
email thread registered at:

https://commitfest.postgresql.org/patch/5111

The branch will be overwritten each time a new patch version is posted to
the thread, and also periodically to check for bitrot caused by changes
on the master branch.

Patch(es): https://www.postgresql.org/message-id/CALDaNm00Gf-EGFpr__7dioEgotkDm1e75RicRQ-hqCdj_5Yjpw@mail.gmail.com
Author(s): vigneshwaran C
    Commitfest Bot committed Apr 28, 2025
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