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Tom Lane d5a4b69c3a Fix assertion failure when a SELECT DISTINCT ON expression is volatile. 
In this case we generate two PathKey references to the expression (one for
DISTINCT and one for ORDER BY) and they really need to refer to the same
EquivalenceClass.  However get_eclass_for_sort_expr was being overly paranoid
and creating two different EC's.  Correct behavior is to use the SortGroupRef
index to decide whether two references to volatile expressions that are
equal() (ie textually equivalent) should be considered the same.

Backpatch to 8.4.  Possibly this should be changed in 8.3 as well, but
I'll refrain in the absence of evidence of a visible failure in that branch.

Per bug #5049.
2009-09-12 00:04:59 +00:00
config Remove any -arch switches given in ExtUtils::Embed's ldopts from our 2009-09-08 18:15:55 +00:00
contrib pgbench has #defines for number of branches, tellers, and accounts. There 2009-09-10 13:59:57 +00:00
doc Increase the maximum value of extra_float_digits to 3, and have pg_dump 2009-09-11 19:17:04 +00:00
src Fix assertion failure when a SELECT DISTINCT ON expression is volatile. 2009-09-12 00:04:59 +00:00
aclocal.m4 Add new auto-detection of thread flags. 2004-04-23 18:15:55 +00:00
configure Remove any -arch switches given in ExtUtils::Embed's ldopts from our 2009-09-08 18:15:55 +00:00
configure.in Replace use of the long-deprecated Bonjour API DNSServiceRegistrationCreate 2009-09-08 16:08:26 +00:00
COPYRIGHT Update copyright for 2009. 2009-01-01 17:24:05 +00:00
GNUmakefile.in Be able to easily figure out the target directory of "make dist". 2009-08-14 21:37:18 +00:00
Makefile Remove remains of old depend target. 2007-01-20 17:16:17 +00:00
README Point to our download URL, rather than listing interface in the README 2008-05-06 22:02:12 +00:00
README.CVS Fix the makefiles to fail cleanly if Perl is needed but not present. This 2009-06-23 03:46:00 +00:00

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/.