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Tom Lane ee63981c1f Avoid sharing subpath list structure when flattening nested AppendRels. 
In some situations the original coding led to corrupting the child AppendRel's
subpaths list, effectively adding other members of the parent's list to it.
This was usually masked because we never made any further use of the child's
list, but given the right combination of circumstances, we could do so.  The
visible symptom would be a relation getting scanned twice, as in bug #5673
from David Schmitt.

Backpatch to 8.2, which is as far back as the risky coding appears.  The
example submitted by David only fails in 8.4 and later, but I'm not convinced
that there aren't any even-more-obscure cases where 8.2 and 8.3 would fail.
 		2010-09-23 15:34:56 -04:00
config Fix remaining stray references to CVS. 2010-09-22 19:51:39 -04:00
contrib Some more gitignore cleanups: cover contrib and PL regression test outputs. 2010-09-22 17:22:40 -04:00
doc Fix inconsistent capitalization of "PL/pgSQL". 2010-09-22 21:57:37 -04:00
src Avoid sharing subpath list structure when flattening nested AppendRels. 2010-09-23 15:34:56 -04:00
.gitignore Convert cvsignore to gitignore, and add .gitignore for build targets. 2010-09-22 12:57:04 +02:00
COPYRIGHT Update copyright for the year 2010. 2010-01-02 16:58:17 +00:00
GNUmakefile.in Rename README.CVS to README.git and change references in it. 2010-09-21 12:40:16 +02:00
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 Remove extra newlines at end and beginning of files, add missing newlines 2010-08-19 05:57:36 +00:00
README.git Trivial typo fix. 2010-09-21 14:16:00 -04:00
aclocal.m4 Remove cvs keywords from all files. 2010-09-20 22:08:53 +02:00
configure Fix remaining stray references to CVS. 2010-09-22 19:51:39 -04:00
configure.in Remove cvs keywords from all files. 2010-09-20 22:08:53 +02:00

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.  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/.