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David Rowley 5c0a20003b Fix reset of incorrect hash iterator in GROUPING SETS queries 
This fixes an unlikely issue when fetching GROUPING SET results from
their internally stored hash tables.  It was possible in rare cases that
the hash iterator would be set up incorrectly which could result in a
crash.

This was introduced in 4d143509c, so backpatch to v18.

Many thanks to Yuri Zamyatin for reporting and helping to debug this
issue.

Bug: #19078
Reported-by: Yuri Zamyatin <yuri@yrz.am>
Author: David Rowley <dgrowleyml@gmail.com>
Reviewed-by: Jeff Davis <pgsql@j-davis.com>
Discussion: https://postgr.es/m/19078-dfd62f840a2c0766@postgresql.org
Backpatch-through: 18
2025-10-18 16:07:04 +13:00
.github Add CODE_OF_CONDUCT.md, CONTRIBUTING.md, and SECURITY.md. 2024-07-02 13:03:58 -05:00
config Remove traces of support for Sun Studio compiler 2025-09-12 07:39:05 +02:00
contrib Fix privilege checks for pg_prewarm() on indexes. 2025-10-17 11:36:50 -05:00
doc doc: Clarify when backend_xmin in pg_stat_replication can be NULL. 2025-10-17 14:03:42 +09:00
src Fix reset of incorrect hash iterator in GROUPING SETS queries 2025-10-18 16:07:04 +13:00
.cirrus.star ci: Simplify ci-os-only handling 2025-08-14 12:09:34 -04:00
.cirrus.tasks.yml Revert "Improve docs syntax checking" 2025-10-06 07:53:31 -04:00
.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 Add script to keep .editorconfig in sync with .gitattributes 2025-02-01 10:09:45 +01:00
.git-blame-ignore-revs Add commit 7e9c216b52 to .git-blame-ignore-revs. 2025-09-13 14:55:38 -05:00
.gitattributes Fix git whitespace warning 2025-08-15 10:32:35 +02:00
.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 Remove traces of support for Sun Studio compiler 2025-09-12 07:39:05 +02:00
configure.ac Remove traces of support for Sun Studio compiler 2025-09-12 07:39:05 +02:00
COPYRIGHT Align organization wording in copyright statement 2025-05-16 11:20:07 -04:00
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 Fix meson build with -Duuid=ossp when using version older than 0.60 2025-09-22 08:03:23 +09:00
meson_options.txt Add support for basic NUMA awareness 2025-04-07 23:08:17 +02:00
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/.