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In a catalog class that has a "name" type attribute, UPDATEing of an instance of that class may destroy all of the attributes of that instance that are stored as or after the "name" attribute. This is caused by the alignment value of the "name" type being set to "double" in Class pg_type, but "integer" in Class pg_attribute. Postgres constructs a tuple using double alignment, but interprets it using integer alignment. The fix is to change the alignment to integer in pg_type. Note that this corrects the problem for new Postgres systems. Existing databases already contain the error and it can't easily be repaired because this very bug prevents updating the class that contains it. -- Bryan Henderson Phone 408-227-6803 San Jose, California
POSTGRES95 Data Base Management System This directory contains the 1.02 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.