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Robert Haas dc47beacaa get_memoize_path: Don't exit quickly when PGS_NESTLOOP_PLAIN is unset. 
This function exits early in the case where the number of inner rows
is estimated to be less than 2, on the theory that in that case a
Nested Loop with inner Memoize must lose to a plain Nested Loop.
But since commit 4020b370f2 it's
possible for a plain Nested Loop to be disabled, while a Nested Loop
with inner Memoize is still enabled. In that case, this reasoning
is not valid, so adjust the code not to exit early in that case.

This issue was revealed by a test_plan_advice failure on buildfarm
member skink, where NESTED_LOOP_MEMOIZE() couldn't be enforced on
replanning due to this early exit.

Discussion: http://postgr.es/m/CA+TgmoZUN8FT1Ah=m6Uis5bHa4FUa+_hMDWtcABG17toEfpiUg@mail.gmail.com
2026-03-24 16:17:26 -04:00
.github Add CODE_OF_CONDUCT.md, CONTRIBUTING.md, and SECURITY.md. 2024-07-02 13:03:58 -05:00
config Hardcode override of typeof_unqual for clang-for-bitcode 2026-03-16 19:24:49 +01:00
contrib Don't include storage/lock.h in so many headers 2026-03-24 17:11:12 +01:00
doc Add support for lock statistics in pgstats 2026-03-24 15:32:09 +09:00
src get_memoize_path: Don't exit quickly when PGS_NESTLOOP_PLAIN is unset. 2026-03-24 16:17:26 -04:00
.cirrus.star ci: Simplify ci-os-only handling 2025-08-14 12:09:34 -04:00
.cirrus.tasks.yml ci: Run headerscheck and cpluspluscheck in parallel 2026-03-23 08:40:29 +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 015d32016d to .git-blame-ignore-revs. 2026-03-19 13:45:07 +09:00
.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 Enable -Wstrict-prototypes and -Wold-style-definition by default 2026-03-18 14:31:50 +01:00
configure.ac Enable -Wstrict-prototypes and -Wold-style-definition by default 2026-03-18 14:31:50 +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 Restore AIX support. 2026-02-23 13:34:22 -05:00
meson.build Enable -Wstrict-prototypes and -Wold-style-definition by default 2026-03-18 14:31:50 +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/.