97d4262683
In the synopsis, make the syntax for merge_update consistent with the syntax for a plain UPDATE command. It was missing the optional "ROW" keyword that can be used in a multi-column assignment, and the option to assign from a multi-column subquery, both of which have been supported by MERGE since it was introduced. In the parameters section for the with_query parameter, mention that WITH RECURSIVE isn't supported, since this is different from plain INSERT, UPDATE, and DELETE commands. While at it, move that entry to the top of the list, for consistency with the other pages. Back-patch to v15, where MERGE was introduced. Discussion: https://postgr.es/m/CAEZATCWoQyWkMFfu7JXXQr8dA6%3DgxjhYzgpuBP2oz0QoJTxGWw%40mail.gmail.com
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/.