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Michael Paquier 3b15032dad Fix incorrect errno in OpenWalSummaryFile() 
This routine has an option to bypass an error if a WAL summary file is
opened for read but is missing (missing_ok=true).  However, the code
incorrectly checked for EEXIST, that matters when using O_CREAT and
O_EXCL, rather than ENOENT, for this case.

There are currently only two callers of OpenWalSummaryFile() in the
tree, and both use missing_ok=false, meaning that the check based on the
errno is currently dead code.  This issue could matter for out-of-core
code or future backpatches that would like to use missing_ok set to
true.

Issue spotted while monitoring this area of the code, after
a9afa021e9.

Author: Michael Paquier <michael@paquier.xyz>
Reviewed-by: Chao Li <li.evan.chao@gmail.com>
Discussion: https://postgr.es/m/aYAf8qDHbpBZ3Rml@paquier.xyz
Backpatch-through: 17
2026-02-03 11:25:16 +09:00
config Don't put library-supplied -L/-I switches before user-supplied ones. 2025-07-29 15:17:41 -04:00
contrib Fix bogus ctid requirement for dummy-root partitioned targets 2026-01-23 10:23:22 +09:00
doc doc: Mention pg_get_partition_constraintdef() 2026-01-22 16:35:48 +09:00
src Fix incorrect errno in OpenWalSummaryFile() 2026-02-03 11:25:16 +09:00
.abi-compliance-history Update .abi-compliance-history for change to TransitionCaptureState. 2026-01-30 08:49:43 +00:00
.cirrus.star ci: Simplify ci-os-only handling 2025-08-14 12:02:42 -04:00
.cirrus.tasks.yml Fix typo 2026-01-07 15:48:54 +01:00
.cirrus.yml ci: Per-repo configuration for manually trigger tasks 2025-08-14 11:33:47 -04:00
.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 previous commit to .git-blame-ignore-revs. 2025-10-21 10:02:19 -05:00
.gitattributes Fix git whitespace warning 2025-08-15 10:32:07 +02:00
.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 Stamp 17.7. 2025-11-10 16:53:58 -05:00
configure.ac Stamp 17.7. 2025-11-10 16:53:58 -05:00
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 Adapt REL_17_STABLE to its new status as a stable branch 2024-07-01 08:05:35 +09:00
meson.build Add check for large files in meson.build 2025-11-12 09:02:32 +09:00
meson_options.txt Allow selecting the git revision to be packaged by "make dist". 2024-05-03 11:08:50 -04:00
README.md Adapt REL_17_STABLE to its new status as a stable branch 2024-07-01 08:05:35 +09:00

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/17/. In particular, information about building PostgreSQL from the source code can be found at https://www.postgresql.org/docs/17/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/.