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706f9dd914
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Alvaro Herrera 706f9dd914 Fix old visibility bug in HeapTupleSatisfiesDirty 
If a tuple is locked but not updated by a concurrent transaction,
HeapTupleSatisfiesDirty would return that transaction's Xid in xmax,
causing callers to wait on it, when it is not necessary (in fact, if the
other transaction had used a multixact instead of a plain Xid to mark
the tuple, HeapTupleSatisfiesDirty would have behave differently and
*not* returned the Xmax).

This bug was introduced in commit 3f7fbf85dc, dated December 1998,
so it's almost 15 years old now.  However, it's hard to see this
misbehave, because before we had NOWAIT the only consequence of this is
that transactions would wait for slightly more time than necessary; so
it's not surprising that this hasn't been reported yet.

Craig Ringer and Andres Freund
2013-08-02 17:02:36 -04:00
config Be consistent about #define'ing configure symbols as "1" not empty. 2013-06-15 14:11:43 -04:00
contrib pg_test_fsync: expand ops/sec display 2013-08-02 00:45:19 -04:00
doc Fix inaccurate description of tablespace. 2013-07-31 22:35:12 +09:00
src Fix old visibility bug in HeapTupleSatisfiesDirty 2013-08-02 17:02:36 -04:00
.gitignore Add coverage/ to .gitignore 2013-07-09 21:12:17 -04:00
aclocal.m4
configure Fix configure probe for sys/ucred.h. 2013-07-25 11:39:46 -04:00
configure.in Fix configure probe for sys/ucred.h. 2013-07-25 11:39:46 -04:00
COPYRIGHT Update copyrights for 2013 2013-01-01 17:15:01 -05:00
GNUmakefile.in Make init-po and update-po recursive make targets 2012-06-29 14:01:54 +03:00
Makefile
README
README.git

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.  Changes between all PostgreSQL releases are recorded in the
file HISTORY.  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/.