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Tom Lane 7d5b686218 Fix possible cache invalidation failure in ReceiveSharedInvalidMessages. 
Commit fad153ec45 modified sinval.c to reduce
the number of calls into sinvaladt.c (which require taking a shared lock)
by keeping a local buffer of collected-but-not-yet-processed messages.
However, if processing of the last message in a batch resulted in a
recursive call to ReceiveSharedInvalidMessages, we could overwrite that
message with a new one while the outer invalidation function was still
working on it.  This would be likely to lead to invalidation of the wrong
cache entry, allowing subsequent processing to use stale cache data.
The fix is just to make a local copy of each message while we're processing
it.

Spotted by Andres Freund.  Back-patch to 8.4 where the bug was introduced.
2014-05-05 14:43:52 -04:00
config Fix "quiet inline" configure test for newer clang compilers. 2014-05-02 15:30:44 -04:00
contrib pgcrypto: fix memset() calls that might be optimized away 2014-04-17 12:37:53 -04:00
doc Fix documentation about joining pg_locks to other views. 2014-04-03 14:18:45 -04:00
src Fix possible cache invalidation failure in ReceiveSharedInvalidMessages. 2014-05-05 14:43:52 -04:00
.gitignore Convert cvsignore to gitignore, and add .gitignore for build targets. 2010-09-22 12:57:06 +02:00
aclocal.m4 Add new auto-detection of thread flags. 2004-04-23 18:15:55 +00:00
configure Fix "quiet inline" configure test for newer clang compilers. 2014-05-02 15:30:44 -04:00
configure.in Stamp 9.0.17. 2014-03-17 15:38:14 -04:00
COPYRIGHT Update copyright for 2014 2014-01-07 16:05:29 -05:00
GNUmakefile.in Don't generate plain-text HISTORY and src/test/regress/README anymore. 2014-02-10 20:48:27 -05:00
HISTORY Improve text of stub HISTORY file. 2014-02-12 18:16:41 -05:00
Makefile Add new make targets "world", "install-world" and "installcheck-world" to build, install and check just about everything. 2010-01-28 23:59:52 +00:00
README Don't generate plain-text HISTORY and src/test/regress/README anymore. 2014-02-10 20:48:27 -05:00
README.git Don't generate plain-text HISTORY and src/test/regress/README anymore. 2014-02-10 20:48:27 -05:00

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:

	http://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
http://www.postgresql.org/download/.  For more information look at our
web site located at http://www.postgresql.org/.