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 <[email protected]> Reviewed-by: Zhijie Hou <[email protected]> Reviewed-by: Matheus Alcantara <[email protected]> Reviewed-by: Amit Kapila <[email protected]> Reviewed-by: Peter Smith <[email protected]> Reviewed-by: Hayato Kuroda <[email protected]> Reviewed-by: Chao Li <[email protected]> Reviewed-by: Haoyan Wang <[email protected]> Discussion: https://postgr.es/m/cab-jlwbbfnuasyenzwp0tck9unkthbzqi6woxnevut6+mv8...@mail.gmail.com Branch ------ master Details ------- https://git.postgresql.org/pg/commitdiff/fd7a25af11e2cad4f48ffc4e50f18644e657ed53 Modified Files -------------- src/backend/catalog/pg_publication.c | 241 ++++++++++++++++++++++++---- src/backend/replication/logical/tablesync.c | 70 +++++--- src/include/catalog/catversion.h | 2 +- src/include/catalog/pg_proc.dat | 13 +- src/test/regress/expected/publication.out | 225 ++++++++++++++++++++++++++ src/test/regress/sql/publication.sql | 107 ++++++++++++ 6 files changed, 606 insertions(+), 52 deletions(-)
