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Tom Lane 141225b251 Mop up some undue familiarity with the innards of Bitmapsets. 
nodeAppend.c used non-nullness of appendstate->as_valid_subplans as
a state flag to indicate whether it'd done ExecFindMatchingSubPlans
(or some sufficient approximation to that).  This was pretty
questionable even in the beginning, since it wouldn't really work
right if there are no valid subplans.  It got more questionable
after commit 27e1f1456 added logic that could reduce as_valid_subplans
to an empty set: at that point we were depending on unspecified
behavior of bms_del_members, namely that it'd not return an empty
set as NULL.  It's about to start doing that, which breaks this
logic entirely.  Hence, add a separate boolean flag to signal
whether as_valid_subplans has been computed.

Also fix a previously-cosmetic bug in nodeAgg.c, wherein it ignored
the return value of bms_del_member instead of updating its pointer.

Patch by me; thanks to Nathan Bossart and Richard Guo for review.

Discussion: https://postgr.es/m/1159933.1677621588@sss.pgh.pa.us
 		2023-03-02 11:37:37 -05:00
config autoconf: Move export_dynamic determination to configure 2022-12-06 18:55:28 -08:00
contrib Remove bms_first_member(). 2023-03-02 11:34:29 -05:00
doc Improve wording in pg_dump compression docs 2023-03-01 16:11:38 +01:00
src Mop up some undue familiarity with the innards of Bitmapsets. 2023-03-02 11:37:37 -05:00
.cirrus.yml ci: freebsd: stop postgres instance on failure, to prevent log upload failures 2023-02-06 15:41:38 -08:00
.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 250c8ee07e to git-blame-ignore-revs 2023-01-13 15:33:49 -08:00
.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
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
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
aclocal.m4 autoconf: Move export_dynamic determination to configure 2022-12-06 18:55:28 -08:00
configure Remove obsolete platforms from ps_status.c. 2023-02-17 15:18:18 +13:00
configure.ac Remove obsolete platforms from ps_status.c. 2023-02-17 15:18:18 +13:00
meson.build meson: Add equivalent of configure --disable-rpath option 2023-03-01 08:05:42 +01:00
meson_options.txt meson: Add equivalent of configure --disable-rpath option 2023-03-01 08:05:42 +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/.