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This new catalog holds the privileges which the system was initialized with at initdb time, along with any permissions set by extensions at CREATE EXTENSION time. This allows pg_dump (and any other similar use-cases) to detect when the privileges set on initdb-created or extension-created objects have been changed from what they were set to at initdb/extension-creation time and handle those changes appropriately. Reviews by Alexander Korotkov, Jose Luis Tallon
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. 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/.