postgres-github.git / summary / log / commit / refs

commit    fd7a25af11e2cad4f48ffc4e50f18644e657ed53
Author:   Masahiko Sawada <msawada@postgresql.org>
Date:     Thu Apr 02 18:34:50 2026 +0000

    Add target_relid parameter to pg_get_publication_tables().
    
    When a tablesync worker checks whether a specific table is published,
    it previously issued a query to the publisher calling
    pg_get_publication_tables() and filtering the result by relid via a
    WHERE clause. Because the function itself was fully evaluated before
    the filter was applied, this forced the publisher to enumerate all
    tables in the publication. For publications covering a large number of
    tables, this resulted in expensive catalog scans and unnecessary CPU
    overhead on the publisher.
    
    This commit adds a new overloaded form of pg_get_publication_tables()
    that accepts an array of publication names and a target table
    OID. Instead of enumerating all published tables, it evaluates
    membership for the specified relation via syscache lookups, using the
    new is_table_publishable_in_publication() helper. This helper
    correctly accounts for publish_via_partition_root, ALL TABLES with
    EXCEPT clauses, schema publications, and partition inheritance, while
    avoiding the overhead of building the complete published table list.
    
    The existing VARIADIC array form of pg_get_publication_tables() is
    preserved for backward compatibility. Tablesync workers use the new
    two-argument form when connected to a publisher running PostgreSQL 19
    or later.
    
    Bump catalog version.
    
    Reported-by: Marcos Pegoraro <marcos@f10.com.br>
    Reviewed-by: Zhijie Hou <houzj.fnst@fujitsu.com>
    Reviewed-by: Matheus Alcantara <matheusssilv97@gmail.com>
    Reviewed-by: Amit Kapila <amit.kapila16@gmail.com>
    Reviewed-by: Peter Smith <smithpb2250@gmail.com>
    Reviewed-by: Hayato Kuroda <kuroda.hayato@fujitsu.com>
    Reviewed-by: Chao Li <li.evan.chao@gmail.com>
    Reviewed-by: Haoyan Wang <wanghaoyan20@163.com>
    Discussion: https://postgr.es/m/CAB-JLwbBFNuASyEnZWP0Tck9uNkthBZqi6WoXNevUT6+mV8XmA@mail.gmail.com

[parent: bc30c704add5]