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820ddb2c2f
As pointed out by Fujii Masao, we weren't quite there on a standby behaving sanely: first because we were failing to acquire the correct state in the case where no XLOG_PARAMETER_CHANGE message was sent (because a checkpoint had already happened after the setting was changed in the master, and then the standby was restarted); and second because promoting the standby with the feature enabled failed to activate it if the master had the feature disabled. This patch fixes both those misbehaviors hopefully without re-introducing any old problems. Also change the hint emitted in a standby together with the error message about the feature being disabled, to make it point out that the place to chance the setting is the master. Otherwise, if the setting is already enabled in the standby, it is very confusing to have it say that the setting must be enabled ... Authors: Álvaro Herrera, Petr Jelínek. Backpatch to 9.5. |
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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. 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/.