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Hiroshi. ReleaseRelationBuffers now removes rel's buffers from pool, instead of merely marking them nondirty. The old code would leave valid buffers for a deleted relation, which didn't cause any known problems but can't possibly be a good idea. There were several places which called ReleaseRelationBuffers *and* FlushRelationBuffers, which is now unnecessary; but there were others that did not. FlushRelationBuffers no longer emits a warning notice if it finds dirty buffers to flush, because with the current bufmgr behavior that's not an unexpected condition. Also, FlushRelationBuffers will flush out all dirty buffers for the relation regardless of block number. This ensures that pg_upgrade's expectations are met about tuple on-row status bits being up-to-date on disk. Lastly, tweak BufTableDelete() to clear the buffer's tag so that no one can mistake it for being a still-valid buffer for the page it once held. Formerly, the buffer would not be found by buffer hashtable searches after BufTableDelete(), but it would still be thought to belong to its old relation by the routines that sequentially scan the shared-buffer array. Again I know of no bugs caused by that, but it still can't be a good idea.
PostgreSQL Data Base Management System (formerly known as Postgres, then as Postgres95). This directory contains the development version of 7.0 of the PostgreSQL database server. The server is not ANSI SQL compliant, but it gets closer with every release. After you unzip and untar the distribution file, look at file INSTALL for the installation notes and file HISTORY for the changes. The latest version of this software may be obtained at ftp://ftp.postgresql.org/pub/. For more information look at our WWW home page located at http://www.postgreSQL.org/. PostgreSQL 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 (formerly known as Postgres, then as Postgres95). Copyright (c) 1994-7 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.