84eca14bc4
Twenty years ago, we removed certain operator classes in favor of letting indexes over their data types be built with some other binary-compatible, more standard opclass. As a hack to allow existing index definitions to be dumped and reloaded, we made CREATE INDEX ignore the removed opclass names, so that such indexes would fall back to the new default opclass for their data types. This was never intended to be a long-lived thing; it carries the obvious risk of breaking some future developer's attempt to re-use those old opclass names. Since all of the cases in question are for opclasses that were removed before PG 8.0, it seems okay to get rid of these hacks now. This is part of a group of patches removing various server-side kluges for transparently upgrading pre-8.0 dump files. Since we've had few complaints about dropping pg_dump's support for dumping from pre-8.0 servers (commit 64f3524e2), it seems okay to now remove these kluges. Discussion: https://postgr.es/m/3685.1583422389@sss.pgh.pa.us
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/.