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98640f960e
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Tomas Vondra 98640f960e Fix memory leak in Incremental Sort rescans 
The Incremental Sort had a couple issues, resulting in leaking memory
during rescans, possibly triggering OOM. The code had a couple of
related flaws:

1. During rescans, the sort states were reset but then also set to NULL
   (despite the comment saying otherwise). ExecIncrementalSort then
   sees NULL and initializes a new sort state, leaking the memory used
   by the old one.

2. Initializing the sort state also automatically rebuilt the info about
   presorted keys, leaking the already initialized info. presorted_keys
   was also unnecessarily reset to NULL.

Patch by James Coleman, based on patches by Laurenz Albe and Tom Lane.
Backpatch to 13, where Incremental Sort was introduced.

Author: James Coleman, Laurenz Albe, Tom Lane
Reported-by: Laurenz Albe, Zu-Ming Jiang
Backpatch-through: 13
Discussion: https://postgr.es/m/b2bd02dff61af15e3526293e2771f874cf2a3be7.camel%40cybertec.at
Discussion: https://postgr.es/m/db03c582-086d-e7cd-d4a1-3bc722f81765%40inf.ethz.ch
2023-07-02 20:03:30 +02:00
config Fix typos in comments 2023-05-02 12:23:08 +09:00
contrib Fix test of pg_stat_io for wal_level=minimal. 2023-07-01 10:00:39 -07:00
doc Introduce long options in pg_archivecleanup 2023-06-30 15:47:11 +09:00
src Fix memory leak in Incremental Sort rescans 2023-07-02 20:03:30 +02:00
.cirrus.yml ci: Remove OpenSSL 3.1 workaround for missing system CA 2023-04-24 11:40:23 +02:00
.dir-locals.el
.editorconfig
.git-blame-ignore-revs Add b334612b8 to .git-blame-ignore-revs. 2023-06-20 09:52:52 -04:00
.gitattributes gitattributes: Ignore imported pg_bsd_indent code for whitespace checks 2023-02-22 09:00:28 +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 Stamp HEAD as 17devel. 2023-06-29 19:05:23 -04:00
configure.ac Stamp HEAD as 17devel. 2023-06-29 19:05:23 -04:00
COPYRIGHT Update copyright for 2023 2023-01-02 15:00:37 -05:00
GNUmakefile.in Integrate pg_bsd_indent into our build/test infrastructure. 2023-02-12 12:22:21 -05:00
HISTORY
Makefile
meson_options.txt meson: Attach colon to keyword argument 2023-06-29 12:53:41 +02:00
meson.build Stamp HEAD as 17devel. 2023-06-29 19:05:23 -04:00
README
README.git

README 

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.

PostgreSQL has many language interfaces, many of which are listed here:

	https://www.postgresql.org/download/

See the file INSTALL for instructions on how to build and install
PostgreSQL.  That file also lists supported operating systems and
hardware platforms and contains information regarding any other
software packages that are required to build or run the PostgreSQL
system.  Copyright and license information can be found in the
file COPYRIGHT.  A comprehensive documentation set is included in this
distribution; it can be read as described in the installation
instructions.

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