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Tom Lane 0ae5b763ea Clean up handling of client_encoding GUC in parallel workers. 
The previous coding here threw an error from assign_client_encoding
if it was invoked in a parallel worker.  That's a very fundamental
violation of the GUC hook API: assign hooks must not throw errors.
The place to complain is in the check hook, so move the test to
there, and use the regular check-hook API (ie return false) to
report it.

The reason this coding is a problem is that it breaks GUC rollback,
which may occur after we leave InitializingParallelWorker state.
That case seems not actually reachable before now, but commit
f5f30c22e made it reachable, so we need to fix this before that
can be un-reverted.

In passing, improve the commentary in ParallelWorkerMain, and
add a check for failure of SetClientEncoding.  That's another
case that can't happen now but might become possible after
foreseeable code rearrangements (notably, if the shortcut of
skipping PrepareClientEncoding stops being OK).

Discussion: https://postgr.es/m/18545-feba138862f19aaa@postgresql.org
2024-08-06 12:21:53 -04:00
.github Add CODE_OF_CONDUCT.md, CONTRIBUTING.md, and SECURITY.md. 2024-07-02 13:03:58 -05:00
config jit: Remove {llvm-config,clang}-N configure probes. 2024-05-16 13:58:25 +12:00
contrib Remove volatile qualifiers from pg_stat_statements.c. 2024-08-06 10:56:37 -05:00
doc Restrict accesses to non-system views and foreign tables during pg_dump. 2024-08-05 06:05:33 -07:00
src Clean up handling of client_encoding GUC in parallel workers. 2024-08-06 12:21:53 -04:00
.cirrus.star Remove duplicate words in docs and code comments. 2023-10-09 09:18:47 +05:30
.cirrus.tasks.yml Convert node test compile-time settings into run-time parameters 2024-08-01 10:09:18 +02:00
.cirrus.yml ci: Make compute resources for CI configurable 2023-08-23 15:15:28 -07:00
.dir-locals.el Make Emacs perl-mode indent more like perltidy. 2019-01-13 11:32:31 -08:00
.editorconfig Add .editorconfig 2019-12-18 09:13:13 +01:00
.git-blame-ignore-revs Add a couple of recent commits to .git-blame-ignore-revs. 2024-07-16 11:04:55 -05:00
.gitattributes Remove non-existing file from .gitattributes 2024-02-16 11:39:09 +01:00
.gitignore Update top-level .gitignore. 2022-12-04 15:23:00 -05:00
aclocal.m4 autoconf: Move export_dynamic determination to configure 2022-12-06 18:55:28 -08:00
configure Add -Wmissing-variable-declarations to the standard compilation flags 2024-08-03 11:51:02 +02:00
configure.ac Add -Wmissing-variable-declarations to the standard compilation flags 2024-08-03 11:51:02 +02:00
COPYRIGHT Update copyright for 2024 2024-01-03 20:49:05 -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 Remove AIX support 2024-02-28 15:17:23 +04:00
meson.build Move astreamer (except astreamer_inject) to fe_utils. 2024-08-05 11:41:57 -04:00
meson_options.txt Remove spinlocks and atomics from meson_options.txt. 2024-07-30 23:37:14 +12:00
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/.