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Peter Eisentraut 2ce7458365 Update GROUP BY ALL comments about window functions 
When GROUP BY ALL was added in commit ef38a4d975, the SQL standard
working draft was silent on what to do with window functions.  This
has now been fixed in the SQL standard working draft.  Update the
documentation and code comments about that.

Also make the documentation more specific that we are only talking
about aggregate functions referring to the same query level, which is
another thing that has been made more precise in the SQL standard
working draft since.

The PostgreSQL implementation was already doing the right thing for
both aspects, so no functionality changes.

Reviewed-by: Tom Lane <tgl@sss.pgh.pa.us>
Discussion: https://www.postgresql.org/message-id/flat/CAHM0NXjz0kDwtzoe-fnHAqPB1qA8_VJN0XAmCgUZ%2BiPnvP5LbA%40mail.gmail.com
2026-07-07 08:47:07 +02:00
.github ci: Improve ccache handling 2026-06-08 15:26:47 -04:00
config Update config.guess and config.sub 2026-04-09 11:26:14 +02:00
contrib Use PG_MODULE_MAGIC_EXT in newly introduced modules 2026-07-06 15:45:58 -04:00
doc Update GROUP BY ALL comments about window functions 2026-07-07 08:47:07 +02:00
src Update GROUP BY ALL comments about window functions 2026-07-07 08:47:07 +02:00
.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 commit fdad19e1cf to .git-blame-ignore-revs. 2026-07-03 14:05:21 +05:30
.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 Stamp HEAD as 20devel. 2026-06-29 16:29:11 -04:00
configure.ac Stamp HEAD as 20devel. 2026-06-29 16:29:11 -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 Stamp HEAD as 20devel. 2026-06-29 16:29:11 -04:00
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/.