add ST_MemUnion

git-svn-id: http://svn.osgeo.org/postgis/branches/1.3@3135 b70326c6-7e19-0410-871a-916f4a2858ee

diff --git a/postgis_comments.sql b/postgis_comments.sql
index 1ff58980369827614213febd5b66a3dabc137e3c..feae303b2ff62aa464481050e855e8323b3ad3f0 100644 (file)
--- a/postgis_comments.sql
+++ b/postgis_comments.sql
@@ -241,6 +241,8 @@ COMMENT ON FUNCTION ST_MakePolygon(geometry, geometry[]) IS 'args: outerlinestri
                        \r
 COMMENT ON FUNCTION ST_Intersection(geometry, geometry) IS 'args: geomA, geomB - Returns a geometry that represents the shared portion of geomA and geomB';\r
                        \r
+COMMENT ON AGGREGATE ST_MemUnion(geometry) IS 'args: geomfield - Same as ST_Union, only memory-friendly (uses less memory and more processor time).';\r
+                       \r
 COMMENT ON AGGREGATE ST_Polygonize(geometry) IS 'args: geomfield - Aggregate. Creates a GeometryCollection containing possible polygons formed from the constituent linework of a set of geometries.';\r
                        \r
 COMMENT ON FUNCTION ST_Shift_Longitude(geometry ) IS 'args: geomA - Reads every point/vertex in every component of every feature in a geometry, and if the longitude coordinate is <0, adds 360 to it. The result would be a 0-360 version of the data to be plotted in a 180 centric map';\r