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rather than 0/0, so that we can safely use 0/0 as an invalid value. This is a more future-proof fix for the corner-case bug in streaming replication that was fixed yesterday. We had a similar corner-case bug with log/seg 0/0 back in February as well. Avoiding 0/0 as a valid value should prevent bugs like that in the future. Per Tom Lane's idea. Back-patch to 9.0. Since this only affects bootstrapping, it makes no difference to existing installations. We don't need to worry about the bug in existing installations, because if you've managed to get past the initial base backup already, you won't hit the bug in the future either.
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/.