Add link to OpenGeo workshop on KNN to KNN operator.

git-svn-id: http://svn.osgeo.org/postgis/trunk@10318 b70326c6-7e19-0410-871a-916f4a2858ee

diff --git a/doc/reference_operator.xml b/doc/reference_operator.xml
index a517b056c80af4dd07bcb82a7408cbf3ee485bc5..7f2da763e6a0fe40c7d4985a4dd0f7f6d23f2cdb 100644 (file)
--- a/doc/reference_operator.xml
+++ b/doc/reference_operator.xml
@@ -1103,6 +1103,7 @@ select 'LINESTRING(0 0, 1 1)'::geometry ~= 'LINESTRING(0 1, 1 0)'::geometry as e
                          geometries.  It is different from other operators that use spatial indexes in that the spatial index is only used when the operator
                          is in the ORDER BY clause.</para></note>
                        <note><para>Index only kicks in if one of the geometries is a constant (not in a subquery/cte).  e.g. 'SRID=3005;POINT(1011102 450541)'::geometry instead of a.geom</para></note>
+                       <para>Refer to <ulink url="http://workshops.opengeo.org/postgis-intro/knn.html">OpenGeo workshop: Nearest-Neighbour Searching</ulink> for real live example.</para>
 
                         <para>Availability: 2.0.0 only available for PostgreSQL 9.1+</para>