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John Naylor 9303d62c6d Separate out bytea sort support from varlena.c 
In the wake of commit b45242fd3, bytea_sortsupport() still called out
to varstr_sortsupport(). Treating bytea as a kind of text/varchar
required varstr_sortsupport() to allow for the possibility of
NUL bytes, but only for C collation. This was confusing. For
better separation of concerns, create an independent sortsupport
implementation in bytea.c.

The heuristics for bytea_abbrev_abort() remain the same as for
varstr_abbrev_abort(). It's possible that the bytea case warrants
different treatment, but that is left for future investigation.

In passing, adjust some strange looking comparisons in
varstr_abbrev_abort().

Author: Aleksander Alekseev <aleksander@tigerdata.com>
Reviewed-by: John Naylor <johncnaylorls@gmail.com>
Reviewed-by: Chao Li <li.evan.chao@gmail.com>
Discussion: https://postgr.es/m/CAJ7c6TP1bAbEhUJa6+rgceN6QJWMSsxhg1=mqfSN=Nb-n6DAKg@mail.gmail.com
2025-12-16 15:19:16 +07:00
.github Add CODE_OF_CONDUCT.md, CONTRIBUTING.md, and SECURITY.md. 2024-07-02 13:03:58 -05:00
config Refactor static_assert() support. 2025-12-15 11:54:23 +01:00
contrib Allow passing a pointer to GetNamedDSMSegment()'s init callback. 2025-12-15 14:27:16 -06:00
doc Allow passing a pointer to GetNamedDSMSegment()'s init callback. 2025-12-15 14:27:16 -06:00
src Separate out bytea sort support from varlena.c 2025-12-16 15:19:16 +07:00
.cirrus.star ci: Simplify ci-os-only handling 2025-08-14 12:09:34 -04:00
.cirrus.tasks.yml headerscheck ccache support 2025-12-04 11:23:23 +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 Refactor static_assert() support. 2025-12-15 11:54:23 +01:00
configure.ac Refactor static_assert() support. 2025-12-15 11:54:23 +01:00
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 Refactor static_assert() support. 2025-12-15 11:54:23 +01:00
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/.