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This gets rid of our former behavior of forcibly downcasing the postmaster's hostname list and truncating the elements to NAMEDATALEN. In principle, DNS hostnames are case-insensitive so the first behavior should be harmless, and server hostnames are seldom long enough for the second behavior to be an issue. But it's still dubious, and an easy fix is available: just use SplitGUCList instead. AFAICT, all other SplitIdentifierString calls in the backend are OK: either the items actually are SQL identifiers, or they are keywords that are short and case-insensitive. Per thinking about bug #16106. While this has been wrong for a very long time, the lack of field complaints means there's little reason to back-patch. Discussion: https://postgr.es/m/16106-7d319e4295d08e70@postgresql.org
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: https://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 https://www.postgresql.org/download/. For more information look at our web site located at https://www.postgresql.org/.