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Tom Lane 14ad0d7bf2 Cleanup NAN code in float.h, too. 
In the same spirit as 3bf905692, assume that all compilers we still
support provide the NAN macro, and get rid of workarounds for that.

The C standard allows implementations to omit NAN if the underlying
float arithmetic lacks quiet (non-signaling) NaNs.  However, we've
required that feature for years: the workarounds only supported
lack of the macro, not lack of the functionality.  I put in a
compile-time #error if there's no macro, just for clarity.

Also fix up the copies of these functions in ecpglib, and leave
a breadcrumb for the next hacker who touches them.

History of the hacks being removed here can be found in commits
1bc2d544b, 4d17a2146, cec8394b5.

Author: Tom Lane <tgl@sss.pgh.pa.us>
Discussion: https://postgr.es/m/1952095.1759764279@sss.pgh.pa.us
2025-10-08 12:19:53 -04:00
.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 Add ExplainState argument to pg_plan_query() and planner(). 2025-10-08 08:33:29 -04:00
doc Implement Eager Aggregation 2025-10-08 17:04:23 +09:00
src Cleanup NAN code in float.h, too. 2025-10-08 12:19:53 -04:00
.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/.