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Nathan Bossart 977d865c36 Describe special values in GUC descriptions more consistently.
Many GUCs accept special values like -1 or an empty string to
disable the feature, use a system default, etc.  While the
documentation consistently lists these special values, the GUC
descriptions do not.  Many such descriptions fail to mention the
special values, and those that do vary in phrasing and placement.
This commit aims to bring some consistency to this area by applying
the following rules:

* Special values should be listed at the end of the long
  description.
* Descriptions should use numerals (e.g., "0") instead of words
  (e.g., "zero").
* Special value mentions should be concise and direct (e.g., "0
  disables the timeout.", "An empty string means use the operating
  system setting.").
* Multiple special values should be listed in ascending order.

Of course, there are exceptions, such as
max_pred_locks_per_relation and search_path, whose special values
are too complex to include.  And there are cases like
listen_addresses, where the meaning of an empty string is arguably
too obvious to include.  In those cases, I've refrained from adding
special value information to the GUC description.

Reviewed-by: Peter Smith <smithpb2250@gmail.com>
Reviewed-by: "David G. Johnston" <david.g.johnston@gmail.com>
Reviewed-by: Daniel Gustafsson <daniel@yesql.se>
Discussion: https://postgr.es/m/Z6aIy4aywxUZHAo6%40nathan
2025-02-14 10:44:30 -06:00
.github Add CODE_OF_CONDUCT.md, CONTRIBUTING.md, and SECURITY.md. 2024-07-02 13:03:58 -05:00
config Remove flex version checks 2025-01-17 09:30:42 +01:00
contrib Remove unnecessary (char *) casts [xlog] 2025-02-13 10:57:07 +01:00
doc Remove unnecessary (char *) casts [string] 2025-02-12 08:49:18 +01:00
src Describe special values in GUC descriptions more consistently. 2025-02-14 10:44:30 -06:00
.cirrus.star Remove duplicate words in docs and code comments. 2023-10-09 09:18:47 +05:30
.cirrus.tasks.yml ci: Collect core files on NetBSD and OpenBSD 2025-02-12 09:40:20 -05:00
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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/.