upstream/postgresql
1
0
Fork 0
mirror of https://github.com/postgres/postgres.git synced 2026-04-28 17:49:35 -04:00
Code Issues Projects Releases Packages Wiki Activity Actions
Base de données relationnelle
56913 commits 38 branches 679 tags 847 MiB
C 84.5%
PLpgSQL 6.2%
Perl 4.9%
Yacc 1.2%
Meson 0.7%
Other 2.4%
Find a file
Tom Lane b6c7cfac88 Restore proper linkage of pg_char_to_encoding() and friends. 
Back in the 8.3 era we discovered that it was problematic if
libpq.so had encoding ID assignments different from the backend,
which is possible because on some platforms libpq.so might be
of a different major version from the calling programs.
psql should use libpq's assignments, but initdb has to use the
backend's, else it will put wrong values into pg_database.
The solution devised in commit 8468146b0 relied on giving initdb
its own copy of encnames.c rather than relying on the functions
exported by libpq.  Later, that metamorphosed into ensuring that
libpgcommon got linked before libpq -- which made things OK for
initdb but broke psql.  We didn't notice for lack of any changes
in enum pg_enc since then.  Commit 06843df4a reversed that, fixing
the latent bug in psql but adding one in initdb.  The meson build
infrastructure is also not being sufficiently careful about link
order, and trying to make it so would be equally fragile.

Hence, let's use a new scheme based on giving the libpq-exported
symbols different real names than the same functions exported from
libpgcommon.a or libpgcommon_srv.a.  (We could distinguish those
two cases as well, but there seems no need to.)  libpq gets the
official names to avoid an ABI break for libpq clients, while the
other cases use #define's to make the real names "xxx_private"
rather than "xxx".  By controlling where the #define's are
applied, we can force any particular client program to use one
set or the other of the encnames.c functions.

We cannot back-patch this, since it'd be an ABI break for backend
loadable modules, but there seems little need to.  We're just
trying to ensure that the world is safe for hypothetical future
additions to enum pg_enc.

In passing this should fix "duplicate symbol" linker warnings
that we've been seeing on AIX buildfarm members since commit
06843df4a.  It's not very clear why that linker is complaining
now, when there were strictly *more* duplicates visible before,
but in any case this should remove the reason for complaint.

Patch by me; thanks to Andres Freund for review.

Discussion: https://postgr.es/m/2385119.1696354473@sss.pgh.pa.us
2023-10-07 12:08:10 -04:00
config Use native CRC instructions on 64-bit LoongArch 2023-08-10 11:36:15 +07:00
contrib Constify crc32_sz 2023-10-05 08:53:21 +02:00
doc dblink: Replace WAIT_EVENT_EXTENSION with custom wait events 2023-10-05 10:23:22 +09:00
src Restore proper linkage of pg_char_to_encoding() and friends. 2023-10-07 12:08:10 -04:00
.cirrus.star ci: Prepare to make compute resources for CI configurable 2023-08-23 15:15:28 -07:00
.cirrus.tasks.yml Use "template" data directory in tests 2023-08-24 14:38:02 -07:00
.cirrus.yml ci: Make compute resources for CI configurable 2023-08-23 15:15:28 -07:00
.dir-locals.el Make Emacs perl-mode indent more like perltidy. 2019-01-13 11:32:31 -08:00
.editorconfig Add .editorconfig 2019-12-18 09:13:13 +01:00
.git-blame-ignore-revs Add bc6041b61f to .git-blame-ignore-revs. 2023-08-30 16:06:12 +09:00
.gitattributes gitattributes: Ignore imported pg_bsd_indent code for whitespace checks 2023-02-22 09:00:28 +01:00
.gitignore Update top-level .gitignore. 2022-12-04 15:23:00 -05:00
aclocal.m4 autoconf: Move export_dynamic determination to configure 2022-12-06 18:55:28 -08:00
configure Remove traces of Sun -lposix4. 2023-08-17 16:16:43 +12:00
configure.ac Remove traces of Sun -lposix4. 2023-08-17 16:16:43 +12:00
COPYRIGHT Update copyright for 2023 2023-01-02 15:00:37 -05:00
GNUmakefile.in Integrate pg_bsd_indent into our build/test infrastructure. 2023-02-12 12:22:21 -05:00
HISTORY Canonicalize some URLs 2020-02-10 20:47:50 +01:00
Makefile Dynamically find correct installation docs in Makefile. 2022-01-19 14:48:25 +01:00
meson.build meson: macos: Correct -exported_symbols_list syntax for Sonoma compat 2023-09-30 12:10:47 -07:00
meson_options.txt meson: Attach colon to keyword argument 2023-06-29 12:53:41 +02:00
README Canonicalize some URLs 2020-02-10 20:47:50 +01:00
README.git Canonicalize some URLs 2020-02-10 20:47:50 +01:00

README 

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.

PostgreSQL has many language interfaces, many of which are listed here:

	https://www.postgresql.org/download/

See the file INSTALL for instructions on how to build and install
PostgreSQL.  That file also lists supported operating systems and
hardware platforms and contains information regarding any other
software packages that are required to build or run the PostgreSQL
system.  Copyright and license information can be found in the
file COPYRIGHT.  A comprehensive documentation set is included in this
distribution; it can be read as described in the installation
instructions.

The latest version of this software may be obtained at
https://www.postgresql.org/download/.  For more information look at our
web site located at https://www.postgresql.org/.