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Michael Paquier c06b5b99bb Add concept of invalid value to SysCacheIdentifier 
This commit tweaks the generation of the syscache IDs for the enum
SysCacheIdentifier to now include an invalid value, with -1 assigned as
value.  The concept of an invalid syscache ID exists when handling
lookups of a ObjectAddress, based on their set of properties in
ObjectPropertyType.  -1 is used for the case where an object type has no
option for a syscache lookup.

This has been found as independently useful while discussing a switch of
SysCacheIdentifier to a typedef, as we already have places that want to
know about the concept of an invalid value when dealing with
ObjectAddresses.

Reviewed-by: Andreas Karlsson <andreas@proxel.se>
Discussion: https://postgr.es/m/aZQRnmp9nVjtxAHS@paquier.xyz
2026-02-18 09:25:52 +09:00
.github Add CODE_OF_CONDUCT.md, CONTRIBUTING.md, and SECURITY.md. 2024-07-02 13:03:58 -05:00
config Revert "Change copyObject() to use typeof_unqual" 2026-02-07 10:08:38 +01:00
contrib hstore: Fix NULL pointer dereference with receive function 2026-02-17 08:41:26 +09:00
doc doc: Add note to ssl_group config on X25519 and FIPS 2026-02-16 15:11:29 +01:00
src Add concept of invalid value to SysCacheIdentifier 2026-02-18 09:25:52 +09:00
.cirrus.star ci: Simplify ci-os-only handling 2025-08-14 12:09:34 -04:00
.cirrus.tasks.yml ci: Configure g++ with 32-bit for 32-bit build 2026-01-09 08:58:50 +01:00
.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 Update .editorconfig and .gitattributes for postgresql.conf.sample. 2025-11-18 10:28:36 -06:00
.git-blame-ignore-revs Add a couple of recent commits to .git-blame-ignore-revs. 2026-01-28 15:56:48 -06:00
.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 Revert "Change copyObject() to use typeof_unqual" 2026-02-07 10:08:38 +01:00
configure.ac Revert "Change copyObject() to use typeof_unqual" 2026-02-07 10:08:38 +01:00
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 Remove AIX support 2024-02-28 15:17:23 +04:00
meson.build meson: Add target for generating docs images 2026-02-13 11:50:14 +01:00
meson_options.txt Update copyright for 2026 2026-01-01 13:24:10 -05:00
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/.