upstream/postgresql
1
0
Fork 0
mirror of https://github.com/postgres/postgres.git synced 2026-03-28 21:33:14 -04:00
Code Issues Projects Releases Packages Wiki Activity Actions
Base de données relationnelle
44799 commits 38 branches 679 tags 814 MiB
C 84.6%
PLpgSQL 6.2%
Perl 4.8%
Yacc 1.2%
Meson 0.7%
Other 2.4%
Find a file
Alvaro Herrera a4d56f583e Use the right memory context for partkey's FmgrInfo 
We were using CurrentMemoryContext to put the partsupfunc fmgr_info
into, which isn't right, because we want the PartitionKey as a whole to
be in the isolated Relation->rd_partkeycxt context.  This can cause a
crash with user-defined support functions in the operator classes used
by partitioning keys.  (Maybe this can cause problems with core-supplied
opclasses too, not sure.)

This is demonstrably broken in Postgres 10, too, but the initial
proposed fix runs afoul of a problem discussed back when 8a0596cb65
("Get rid of copy_partition_key") reorganized that code: namely that it
is possible to jump out of RelationBuildPartitionKey because of some
error and leave a dangling memory context child of CacheMemoryContext.
Also, while reviewing this I noticed that the removed-in-pg11
copy_partition_key was doing something wrong, unfixed in pg10, namely
doing memcpy() on the FmgrInfo, which is bogus (should be doing
fmgr_info_copy).  Therefore, in branch pg10, the sane fix seems to be to
backpatch both the aforementioned 8a0596cb65 and its followup
be2343221f ("Protect against hypothetical memory leaks in
RelationGetPartitionKey"), so do that, then apply the fmgr_info memcxt
bugfix on top.

Add a test case exercising btree-based custom operator classes, which
causes a crash prior to this fix.  This is not a security problem,
because in order to create an operator class you need superuser
privileges anyway.

Authors: Álvaro Herrera and Amit Langote
Reported and diagnosed by: Amit Langote
Discussion: https://postgr.es/m/3041e853-b1dd-a0c6-ff21-7cc5633bffd0@lab.ntt.co.jp
2018-04-12 15:08:10 -03:00
config Use ARMv8 CRC instructions where available. 2018-04-04 12:22:45 +03:00
contrib Revert MERGE patch 2018-04-12 11:22:56 +01:00
doc Revert MERGE patch 2018-04-12 11:22:56 +01:00
src Use the right memory context for partkey's FmgrInfo 2018-04-12 15:08:10 -03:00
.dir-locals.el emacs: Set indent-tabs-mode in perl-mode 2015-04-12 23:53:23 -04:00
.gitattributes Remove contrib/tsearch2. 2017-02-13 11:06:11 -05:00
.gitignore Support for optimizing and emitting code in LLVM JIT provider. 2018-03-22 11:05:22 -07:00
aclocal.m4 Add configure infrastructure (--with-llvm) to enable LLVM support. 2018-03-20 17:26:25 -07:00
configure Use ARMv8 CRC instructions where available. 2018-04-04 12:22:45 +03:00
configure.in Use ARMv8 CRC instructions where available. 2018-04-04 12:22:45 +03:00
COPYRIGHT Update copyright for 2018 2018-01-02 23:30:12 -05:00
GNUmakefile.in Have "make coverage" recurse into contrib as well 2016-09-05 18:44:36 -03:00
HISTORY Change documentation references to PG website to use https: not http: 2017-05-20 21:50:47 -04:00
Makefile Fix non-GNU makefiles for AIX make. 2017-11-30 00:57:22 -08:00
README Change documentation references to PG website to use https: not http: 2017-05-20 21:50:47 -04:00
README.git Change documentation references to PG website to use https: not http: 2017-05-20 21:50:47 -04:00

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/.