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Tom Lane 0f24332aeb Fix NOTIFY wakeups for pre-commit LISTEN entries. 
Commit 282b1cde9 made SignalBackends() ignore ListenerEntry entries
whose "listening" flag said that the listener was not yet committed.
That will be true for a new listener that has already registered its
queue position, but has not yet reached AtCommit_Notify().  If another
backend notifies the same channel in that window, SignalBackends()
would directly advance the new listener's queue position, causing it
to miss message(s).  Really this is a definitional question: is a new
listener active as of PreCommit, or as of AtCommit?  But it seems to
make more sense to expect that the new listener will see all messages
after its initially-registered queue position, especially since the
direct-advance logic is supposed to be an optimization that doesn't
affect semantics.

Fix this by treating all channel entries as valid wakeup targets.
Rename the "listening" flag to removeOnAbort to reflect its remaining
purpose: identifying staged LISTEN entries that abort cleanup must
remove.

While we're here, remove an obsolete test case added by 282b1cde9.
The check for "ChannelHashAddListener array growth" was meant to
exercise code that never made it into the committed patch, so now
it's just a waste of test cycles.

Author: Joel Jacobson <joel@compiler.org>
Reviewed-by: Arseniy Mukhin <arseniy.mukhin.dev@gmail.com>
Reviewed-by: Tom Lane <tgl@sss.pgh.pa.us>
Discussion: https://postgr.es/m/9835b0a4-9121-47ac-9c44-427b8b1a7f1b@app.fastmail.com
Discussion: https://postgr.es/m/6fe5ee75-537d-4d4f-909a-b21303c3ce75@app.fastmail.com
2026-05-27 12:23:42 -04:00
.github Add CODE_OF_CONDUCT.md, CONTRIBUTING.md, and SECURITY.md. 2024-07-02 13:03:58 -05:00
config Update config.guess and config.sub 2026-04-09 11:26:14 +02:00
contrib Use strtoi64 instead of strtoll 2026-05-27 17:12:27 +02:00
doc doc: add comma to UPDATE docs, for consistency 2026-05-26 20:18:00 -04:00
src Fix NOTIFY wakeups for pre-commit LISTEN entries. 2026-05-27 12:23:42 -04:00
.cirrus.star ci: Simplify ci-os-only handling 2025-08-14 12:09:34 -04:00
.cirrus.tasks.yml Enable test_cplusplusext with MSVC 2026-04-01 07:48:47 +02:00
.cirrus.yml ci: Per-repo configuration for manually trigger tasks 2025-08-14 11:54:03 -04:00
.dir-locals.el Make Emacs perl-mode indent more like perltidy. 2019-01-13 11:32:31 -08:00
.editorconfig Update .editorconfig and .gitattributes for postgresql.conf.sample. 2025-11-18 10:28:36 -06:00
.git-blame-ignore-revs Add several commits to .git-blame-ignore-revs. 2026-05-13 14:53:48 -05:00
.gitattributes Update .editorconfig and .gitattributes for postgresql.conf.sample. 2025-11-18 10:28:36 -06:00
.gitignore Update top-level .gitignore. 2022-12-04 15:23:00 -05:00
.mailmap Add a Git .mailmap file 2024-11-05 13:56:02 +01:00
aclocal.m4 autoconf: Move export_dynamic determination to configure 2022-12-06 18:55:28 -08:00
configure Add errdetail() with PID and UID about source of termination signal. 2026-04-07 10:22:33 -04:00
configure.ac Add errdetail() with PID and UID about source of termination signal. 2026-04-07 10:22:33 -04:00
COPYRIGHT Update copyright for 2026 2026-01-01 13:24:10 -05:00
GNUmakefile.in Allow selecting the git revision to be packaged by "make dist". 2024-05-03 11:08:50 -04:00
HISTORY Canonicalize some URLs 2020-02-10 20:47:50 +01:00
Makefile Restore AIX support. 2026-02-23 13:34:22 -05:00
meson.build Meson: Fix check_header() for readline and gssapi 2026-04-20 12:36:14 +09:00
meson_options.txt Revert "Add built-in fuzzing harnesses for security testing." 2026-04-10 09:53:58 -04:00
README.md Revise the style of a paragraph in README.md. 2024-03-21 10:16:41 -05:00

README.md

PostgreSQL Database Management System

This directory contains the source code distribution of the PostgreSQL database management system.

PostgreSQL is an advanced object-relational database management system that supports an extended subset of the SQL standard, including transactions, foreign keys, subqueries, triggers, user-defined types and functions. This distribution also contains C language bindings.

Copyright and license information can be found in the file COPYRIGHT.

General documentation about this version of PostgreSQL can be found at https://www.postgresql.org/docs/devel/. In particular, information about building PostgreSQL from the source code can be found at https://www.postgresql.org/docs/devel/installation.html.

The latest version of this software, and related software, may be obtained at https://www.postgresql.org/download/. For more information look at our web site located at https://www.postgresql.org/.