rdelaage
/
postgresql
mirror of https://git.postgresql.org/git/postgresql.git
1
0
Fork 0
Code Issues Packages Projects Releases Wiki Activity
58,404 Commits 36 Branches 606 Tags 423 MiB
C 86%
PLpgSQL 5.5%
Perl 4.1%
Yacc 1.3%
Makefile 0.7%
Other 2.3%
Go to file
Tom Lane 03107b4eda Ensure generated join clauses for child rels have correct relids. 
When building a join clause derived from an EquivalenceClass, if the
clause is to be used with an appendrel child relation then make sure
its clause_relids include the relids of that child relation.
Normally this would be true already because the EquivalenceMember
would be a Var of that relation.  However, if the appendrel represents
a flattened UNION ALL construct then some child EquivalenceMembers
could be constants with no relids.  The resulting under-marked clause
is problematic because it could mislead join_clause_is_movable_into
about where the clause should be evaluated.  We do not have an example
showing incorrect plan generation, but there are existing cases in
the regression tests that will fail the Asserts this patch adds to
get_baserel_parampathinfo.  A similarly wrong conclusion about a
clause being considered by get_joinrel_parampathinfo would lead to
wrong placement of the clause.  (This also squares with the way
that clause_relids is calculated for non-equijoin clauses in
adjust_appendrel_attrs.)

The other reason for wanting these new Asserts is that the previous
blithe assumption that the results of generate_join_implied_equalities
"necessarily satisfy join_clause_is_movable_into" turns out to be
wrong pre-v16.  If it's still wrong it'd be good to find out.

Per bug #18429 from Benoît Ryder.  The bug as filed was fixed by
commit 2489d76c4, but these changes correlate with the fix we
will need to apply in pre-v16 branches.

Discussion: https://postgr.es/m/18429-8982d4a348cc86c6@postgresql.org
 		2024-04-16 11:22:51 -04:00
config Update config.guess and config.sub 2024-04-09 14:21:57 +02:00
contrib Add regression test for BRIN parallel builds 2024-04-14 18:58:32 +02:00
doc docs: Consolidate into new "WAL for Extensions" chapter. 2024-04-15 15:57:13 -04:00
src Ensure generated join clauses for child rels have correct relids. 2024-04-16 11:22:51 -04:00
.cirrus.star Remove duplicate words in docs and code comments. 2023-10-09 09:18:47 +05:30
.cirrus.tasks.yml Add tests for libpq gssencmode and sslmode options 2024-04-08 02:49:32 +03:00
.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 commit 64e401b62b to .git-blame-ignore-revs. 2024-03-26 15:08:47 -05:00
.gitattributes Remove non-existing file from .gitattributes 2024-02-16 11:39:09 +01:00
.gitignore Update top-level .gitignore. 2022-12-04 15:23:00 -05:00
COPYRIGHT Update copyright for 2024 2024-01-03 20:49:05 -05:00
GNUmakefile.in make dist uses git archive 2024-03-25 06:29:53 +01:00
HISTORY Canonicalize some URLs 2020-02-10 20:47:50 +01:00
Makefile Remove AIX support 2024-02-28 15:17:23 +04:00
README.md Revise the style of a paragraph in README.md. 2024-03-21 10:16:41 -05:00
aclocal.m4 autoconf: Move export_dynamic determination to configure 2022-12-06 18:55:28 -08:00
configure Optimize pg_popcount() with AVX-512 instructions. 2024-04-06 21:56:23 -05:00
configure.ac Optimize pg_popcount() with AVX-512 instructions. 2024-04-06 21:56:23 -05:00
meson.build meson: Remove obsolete function test 2024-04-11 12:44:54 +02:00
meson_options.txt Add backend support for injection points 2024-01-22 10:15:50 +09:00

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/.