Migrate rtree_gist functionality into the core system, and add some

Tom Lane <tgl@sss.pgh.pa.us>

Commit: e7e1694295e3d867f07afedf6505d0e0436cb67e
Author: Tom Lane <tgl@sss.pgh.pa.us>
Date: 2005-07-01T19:19:05Z
Releases: 8.1.0
Migrate rtree_gist functionality into the core system, and add some
basic regression tests for GiST to the standard regression tests.
I took the opportunity to add an rtree-equivalent gist opclass for
circles; the contrib version only covered boxes and polygons, but
indexing circles is very handy for distance searches.

Files