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Google seems to like to return textsearch.html for queries about GIN and GiST indexes, even though it's not a primary reference for either. It seems likely that that's because those keywords appear in the page title. Since "GIN and GiST Index Types" is not a very apposite title for this material anyway, rename the section in hopes of stopping that. Also provide explicit links to the GIN and GiST chapters, to help anyone who finds their way to this page regardless. Per gripe from Jan Piotrowski. Back-patch to supported branches. (Unfortunately Google is likely to continue returning the 9.1 version of this page, but improving that situation is a matter for the www team.) Discussion: https://postgr.es/m/164978902252.1276550.9330175733459697101@wrigleys.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/.