182cdf5aea
Some code added by commit 2f094e7ac69 needs to be behind a version check so that it is not run against older databases. Author: Andrew Dunstan <andrew@dunslane.net> Reviewed-by: Junwang Zhao <zhjwpku@gmail.com> Discussion: https://www.postgresql.org/message-id/afe3f099-3271-4fc4-8e32-467b5309affb%40dunslane.net
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/.