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Marc G. Fournier 69c7f25bed Fixes: 
I found another bug in btree index.  Looking at the code it seems that NULL
keys are never used to build or scan a btree index (see the explain commands
in the example).  However this is not the case when a null key is retrieved
in an outer loop of a join select and used in an index scan of an inner loop.
This bug causes at least three kinds of problems:

1)  the backend crashes when it tries to compare a text string with a null.

2)  it is not possible to find tuples with null keys in a join.

3)  null is considered equal to 0 when the datum is passed by value, see
    the last query.

Submitted by: Massimo Dal Zotto <dz@cs.unitn.it>
 		1996-10-30 06:08:10 +00:00
contrib Updated version. 1996-09-26 14:07:07 +00:00
doc Add in Andrew's FAQs 1996-10-28 22:11:47 +00:00
src Fixes: 1996-10-30 06:08:10 +00:00
COPYRIGHT Support Docs & Contrib 1996-08-18 22:14:33 +00:00
HISTORY Support Docs & Contrib 1996-08-18 22:14:33 +00:00
INSTALL Fix up INSTALL file 1996-10-30 06:01:55 +00:00
MIGRATION_to_1.02.1 Support Docs & Contrib 1996-08-18 22:14:33 +00:00
README Change README to 2.0. 1996-09-26 18:34:49 +00:00

README 

POSTGRES95 Data Base Management System

This directory contains the 2.0 release of Postgres95. See INSTALL for
the installation notes and HISTORY for the changes.

We also have a WWW home page located at:
	http://www.ki.net/postgres95

Postgres95 is not public domain software.  It is copyrighted by the
University of California but may be used according to the licensing
terms of the the copyright below:

------------------------------------------------------------------------

POSTGRES95 Data Base Management System

Copyright (c) 1994-6 Regents of the University of California

Permission to use, copy, modify, and distribute this software and its
documentation for any purpose, without fee, and without a written agreement
is hereby granted, provided that the above copyright notice and this
paragraph and the following two paragraphs appear in all copies.

IN NO EVENT SHALL THE UNIVERSITY OF CALIFORNIA BE LIABLE TO ANY PARTY FOR
DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES, INCLUDING
LOST PROFITS, ARISING OUT OF THE USE OF THIS SOFTWARE AND ITS
DOCUMENTATION, EVEN IF THE UNIVERSITY OF CALIFORNIA HAS BEEN ADVISED OF THE
POSSIBILITY OF SUCH DAMAGE.

THE UNIVERSITY OF CALIFORNIA SPECIFICALLY DISCLAIMS ANY WARRANTIES,
INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY
AND FITNESS FOR A PARTICULAR PURPOSE.  THE SOFTWARE PROVIDED HEREUNDER IS
ON AN "AS IS" BASIS, AND THE UNIVERSITY OF CALIFORNIA HAS NO OBLIGATIONS TO
PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS.