84b8fccbe5
c01743aa4 and later 161320b4b adjusted the EXPLAIN output to show which plan nodes were chosen despite being disabled by the various enable* GUCs. Prior to e22253467, the disabledness of a node was only evident by a large startup cost penalty. Since we now explicitly tag disabled nodes with a boolean property in EXPLAIN, let's add some documentation to provide some details about why and when disabled nodes can appear in the plan. Author: Laurenz Albe, David Rowley Discussion: https://postgr.es/m/883729e429267214753d5e438c82c73a58c3db5d.camel@cybertec.at
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.
Copyright and license information can be found in the file COPYRIGHT.
General documentation about this version of PostgreSQL can be found at https://www.postgresql.org/docs/devel/. In particular, information about building PostgreSQL from the source code can be found at https://www.postgresql.org/docs/devel/installation.html.
The latest version of this software, and related software, may be obtained at https://www.postgresql.org/download/. For more information look at our web site located at https://www.postgresql.org/.