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Tom Lane b3b0b45717 Create btree_gist v1.9, in which inet/cidr opclasses aren't default. 
btree_gist's gist_inet_ops and gist_cidr_ops opclasses are
fundamentally broken: they rely on an approximate representation of
the inet values and hence sometimes miss rows they should return.
We want to eventually get rid of them altogether, but as the first
step on that journey, we should mark them not-opcdefault.

To do that, roll up the preceding deltas since 1.2 into a new base
script btree_gist--1.9.sql.  This will allow installing 1.9 without
going through a transient situation where gist_inet_ops and
gist_cidr_ops are marked as opcdefault; trying to create them that
way will fail if there's already a matching default opclass in the
core system.  Additionally provide btree_gist--1.8--1.9.sql, so
that a database that's been pg_upgraded from an older version can
be migrated to 1.9.

I noted along the way that commit 57e3c5160 had missed marking the
gist_bool_ops support functions as PARALLEL SAFE.  While that probably
has little harmful effect (since AFAIK we don't check that when
calling index support functions), this seems like a good time to make
things consistent.

Readers will also note that I removed the former habit of installing
some opclass operators/functions with ALTER OPERATOR FAMILY, instead
just rolling them all into the CREATE OPERATOR CLASS steps.  The
comment in btree_gist--1.2.sql that it's necessary to use ALTER for
pg_upgrade reproducibility has been obsolete since we invented the
amadjustmembers infrastructure.  Nowadays, gistadjustmembers will
force all operators and non-required support functions to have "soft"
opfamily dependencies, regardless of whether they are installed by
CREATE or ALTER.

Author: Tom Lane <tgl@sss.pgh.pa.us>
Reviewed-by: Matthias van de Meent <boekewurm+postgres@gmail.com>
Reviewed-by: Heikki Linnakangas <hlinnaka@iki.fi>
Discussion: https://postgr.es/m/2483812.1754072263@sss.pgh.pa.us
2026-01-08 13:56:08 -05:00
.github Add CODE_OF_CONDUCT.md, CONTRIBUTING.md, and SECURITY.md. 2024-07-02 13:03:58 -05:00
config Update copyright for 2026 2026-01-01 13:24:10 -05:00
contrib Create btree_gist v1.9, in which inet/cidr opclasses aren't default. 2026-01-08 13:56:08 -05:00
doc pg_createsubscriber: Improve handling of automated recovery configuration 2026-01-08 10:12:33 +09:00
src Use IsA macro, for sake of consistency 2026-01-08 18:58:28 +02:00
.cirrus.star ci: Simplify ci-os-only handling 2025-08-14 12:09:34 -04:00
.cirrus.tasks.yml Fix typo 2026-01-07 15:47:02 +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 commit 86b276a4a9 to .git-blame-ignore-revs. 2025-12-05 14:21:12 -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 strnlen() is now required 2026-01-08 08:51:20 +01:00
configure.ac strnlen() is now required 2026-01-08 08:51:20 +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 strnlen() is now required 2026-01-08 08:51:20 +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/.