317dd55a9c
The implementation is a quad-tree, largely copied from the quad-tree implementation for points. The lower and upper bound of ranges are the 2d coordinates, with some extra code to handle empty ranges. I left out the support for adjacent operator, -|-, from the original patch. Not because there was necessarily anything wrong with it, but it was more complicated than the other operators, and I only have limited time for reviewing. That will follow as a separate patch. Alexander Korotkov, reviewed by Jeff Davis and me.
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: http://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. Changes between all PostgreSQL releases are recorded in the file HISTORY. 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 http://www.postgresql.org/download/. For more information look at our web site located at http://www.postgresql.org/.