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This new GUC context option allows GUC parameters to have the combined properties of PGC_BACKEND and PGC_SUSET, ie, they don't change after session start and non-superusers can't change them. This is a more appropriate choice for log_connections and log_disconnections than their previous context of PGC_BACKEND, because we don't want non-superusers to be able to affect whether their sessions get logged. Note: the behavior for log_connections is still a bit odd, in that when a superuser attempts to set it from PGOPTIONS, the setting takes effect but it's too late to enable or suppress connection startup logging. It's debatable whether that's worth fixing, and in any case there is a reasonable argument for PGC_SU_BACKEND to exist. In passing, re-pgindent the files touched by this commit. Fujii Masao, reviewed by Joe Conway and Amit Kapila
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/.