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Tomas Vondra c91f71b9dc Fix publish_as_relid with multiple publications 
Commit 83fd4532a7 allowed publishing of changes via ancestors, for
publications defined with publish_via_partition_root. But the way
the ancestor was determined in get_rel_sync_entry() was incorrect,
simply updating the same variable. So with multiple publications,
replicating different ancestors, the outcome depended on the order
of publications in the list - the value from the last loop was used,
even if it wasn't the top-most ancestor.

This is a probably rare situation, as in most cases publications do
not overlap, so each partition has exactly one candidate ancestor
to replicate as and there's no ambiguity.

Fixed by tracking the "ancestor level" for each publication, and
picking the top-most ancestor. Adds a test case, verifying the
correct ancestor is used for publishing the changes and that this
does not depend on order of publications in the list.

Older releases have another bug in this loop - once all actions are
replicated, the loop is terminated, on the assumption that inspecting
additional publications is unecessary. But that misses the fact that
those additional applications may replicate different ancestors.

Fixed by removal of this break condition. We might still terminate the
loop in some cases (e.g. when replicating all actions and the ancestor
is the partition root).

Backpatch to 13, where publish_via_partition_root was introduced.

Initial report and fix by me, test added by Hou zj. Reviews and
improvements by Amit Kapila.

Author: Tomas Vondra, Hou zj, Amit Kapila
Reviewed-by: Amit Kapila, Hou zj
Discussion: https://postgr.es/m/d26d24dd-2fab-3c48-0162-2b7f84a9c893%40enterprisedb.com
 		2022-03-16 18:05:58 +01:00
..
authentication Replace Test::More plans with done_testing 2022-02-11 20:54:44 +01:00
examples Update copyright for 2022 2022-01-07 19:04:57 -05:00
isolation Fix temporary object cleanup failing due to toast access without snapshot. 2022-02-21 08:57:34 -08:00
kerberos Replace Test::More plans with done_testing 2022-02-11 20:54:44 +01:00
ldap ldap tests: Add paths for openbsd. 2022-03-09 09:46:21 -08:00
locale pycodestyle (PEP 8) cleanup in Python scripts 2022-03-09 10:54:20 +01:00
mb Fix MB regression tests for WAL-logging of hash indexes. 2017-03-15 07:25:36 -04:00
modules Disallow setting bogus GUCs within an extension's reserved namespace. 2022-02-21 14:10:43 -05:00
perl Fix collection of typos in the code and the documentation 2022-03-15 11:29:35 +09:00
recovery Introduce PG_TEST_TIMEOUT_DEFAULT for TAP suite non-elapsing timeouts. 2022-03-04 18:53:13 -08:00
regress Fix collection of typos in the code and the documentation 2022-03-15 11:29:35 +09:00
ssl Remove PostgreSQL::Test::Utils::perl2host completely 2022-02-20 11:51:45 -05:00
subscription Fix publish_as_relid with multiple publications 2022-03-16 18:05:58 +01:00
Makefile Revert per-index collation version tracking feature. 2021-05-07 21:10:11 +12:00
README Remove the option to build thread_test.c outside configure. 2020-10-21 12:08:48 -04:00

README 

PostgreSQL tests
================

This directory contains a variety of test infrastructure as well as some of the
tests in PostgreSQL. Not all tests are here -- in particular, there are more in
individual contrib/ modules and in src/bin.

Not all these tests get run by "make check". Check src/test/Makefile to see
which tests get run automatically.

authentication/
  Tests for authentication (but see also below)

examples/
  Demonstration programs for libpq that double as regression tests via
  "make check"

isolation/
  Tests for concurrent behavior at the SQL level

kerberos/
  Tests for Kerberos/GSSAPI authentication and encryption

ldap/
  Tests for LDAP-based authentication

locale/
  Sanity checks for locale data, encodings, etc

mb/
  Tests for multibyte encoding (UTF-8) support

modules/
  Extensions used only or mainly for test purposes, generally not suitable
  for installing in production databases

perl/
  Infrastructure for Perl-based TAP tests

recovery/
  Test suite for recovery and replication

regress/
  PostgreSQL's main regression test suite, pg_regress

ssl/
  Tests to exercise and verify SSL certificate handling

subscription/
  Tests for logical replication