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Tom Lane 26112850ec Fix OR-index-scan planner to recognize that a partial index is usable for scanning one term of an OR clause if the index's predicate is implied by that same OR clause term (possibly in conjunction with top-level WHERE clauses). Per recent example from Dawid Kuroczko, http://archives.postgresql.org/pgsql-performance/2004-10/msg00095.php Also, fix a very long-standing bug in index predicate testing, namely the bizarre ordering of decomposition of predicate and restriction clauses. AFAICS the correct way is to break down the predicate all the way, and then for each component term see if you can prove it from the entire restriction set. The original coding had a purely-implementation-artifact distinction between ANDing at the top level and ANDing below that, and proceeded to get the decomposition order wrong everywhere below the top level, with the result that even slightly complicated AND/OR predicates could not be proven. For instance, given create index foop on foo(f2) where f1=42 or f1=1 or (f1 = 11 and f2 = 55); the old code would fail to match this index to the query select * from foo where f1 = 11 and f2 = 55; when it obviously ought to match.		2004-10-11 22:57:00 +00:00
config	Another try at making plpython autoconfiguration work correctly. Use a	2004-10-11 19:32:19 +00:00
contrib	Adjust comments previously moved to column 1 by pgident.	2004-10-07 15:21:58 +00:00
doc	Fix pg_indexes view so that it shows the index's tablespace not the	2004-10-11 17:24:41 +00:00
src	Fix OR-index-scan planner to recognize that a partial index is usable	2004-10-11 22:57:00 +00:00
COPYRIGHT	Update copyright to 2004.	2004-08-29 04:13:13 +00:00
GNUmakefile.in	please find attached an alternate submission which addresses open item	2004-10-06 08:50:02 +00:00
Makefile	please find attached an alternate submission which addresses open item	2004-10-06 08:50:02 +00:00
README	Remove more traces of libpgtcl from the source tree. Also, make some	2004-10-01 02:00:44 +00:00
README.CVS	Some further editorializing on README.CVS.	2004-03-28 06:09:08 +00:00
aclocal.m4	Add new auto-detection of thread flags.	2004-04-23 18:15:55 +00:00
configure	Another try at making plpython autoconfiguration work correctly. Use a	2004-10-11 19:32:19 +00:00
configure.in	Here is a patch to fix win32 ssl builds. Summary of changes:	2004-10-06 09:35:23 +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.

The JDBC, ODBC, C++, Python, and Tcl interfaces have been moved to the
PostgreSQL Projects Web Site at http://gborg.postgresql.org for separate
maintenance.  A Perl DBI/DBD driver is available from CPAN.

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