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David Rowley 84b8fccbe5 Doc: add detail about EXPLAIN's "Disabled" property 
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
2024-10-29 23:28:12 +13:00
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README.md

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/.