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When this reloption is set and wal_level=logical is configured, we'll record the CIDs stamped by inserts, updates, and deletes to the table just as we would for an actual catalog table. This will allow logical decoding to use historical MVCC snapshots to access such tables just as they access ordinary catalog tables. Replication solutions built around the logical decoding machinery will likely need to set this operation for their configuration tables; it might also be needed by extensions which perform table access in their output functions. Andres Freund, reviewed by myself and others. |
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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/.