add ST_ExteriorRing, ST_NumInteriorRings, ST_NumInteriorRing

git-svn-id: http://svn.osgeo.org/postgis/branches/1.3@3127 b70326c6-7e19-0410-871a-916f4a2858ee

diff --git a/postgis_comments.sql b/postgis_comments.sql
index 05421917e4dd2509463b86c720f0a8827c6af555..76b0f1ebfbd3b48ee97f3cdd8e082eede6068c9c 100644 (file)
--- a/postgis_comments.sql
+++ b/postgis_comments.sql
@@ -89,19 +89,25 @@ COMMENT ON FUNCTION ST_EndPoint(geometry ) IS 'args: g - Returns the last point
                        \r
 COMMENT ON FUNCTION ST_Envelope(geometry ) IS 'args: g1 - Returns a geometry representing the bounding box of the supplied geometry.';\r
                        \r
+COMMENT ON FUNCTION ST_ExteriorRing(geometry ) IS 'args: a_polygon - Returns a line string representing the exterior ring of the POLYGON geometry. Return NULL if the geometry is not a polygon. Will not work with MULTIPOLYGON';\r
+                       \r
 COMMENT ON FUNCTION ST_GeometryType(geometry ) IS 'args: g1 - Return the geometry type of the ST_Geometry value.';\r
                        \r
 COMMENT ON FUNCTION ST_IsClosed(geometry ) IS 'args: g - Returns TRUE if the LINESTRINGs start and end points are coincident.';\r
                        \r
+COMMENT ON FUNCTION ST_IsRing(geometry ) IS 'args: g - Returns TRUE if this LINESTRING is both closed and simple.';\r
+                       \r
 COMMENT ON FUNCTION ST_IsValid(geometry ) IS 'args: g - Returns true if the ST_Geometry is well formed.';\r
                        \r
 COMMENT ON FUNCTION ST_NDims(geometry ) IS 'args: g1 - Returns coordinate dimension of the geometry as a small int. Values are: 2,3 or 4.';\r
                        \r
 COMMENT ON FUNCTION ST_NPoints(geometry ) IS 'args: g1 - Return the number of points (vertexes) in a geometry.';\r
                        \r
-COMMENT ON FUNCTION ST_NumPoints(geometry ) IS 'args: g1 - Return the number of points in an ST_LineString or ST_CircularString value.';\r
+COMMENT ON FUNCTION ST_NumInteriorRings(geometry ) IS 'args: a_polygon - Return the number of interior rings of the first polygon in the geometry. This will work with both POLYGON and MULTIPOLYGON types but only looks at the first polygon. Return NULL if there is no polygon in the geometry.';\r
                        \r
-COMMENT ON FUNCTION ST_IsRing(geometry ) IS 'args: g - Returns TRUE if this LINESTRING is both closed and simple.';\r
+COMMENT ON FUNCTION ST_NumInteriorRing(geometry ) IS 'args: a_polygon - Return the number of interior rings of the first polygon in the geometry. Synonym to ST_NumInteriorRings.';\r
+                       \r
+COMMENT ON FUNCTION ST_NumPoints(geometry ) IS 'args: g1 - Return the number of points in an ST_LineString or ST_CircularString value.';\r
                        \r
 COMMENT ON FUNCTION ST_SRID(geometry ) IS 'args: g1 - Returns the spatial reference identifier for the ST_Geometry as defined in spatial_ref_sys table.';\r
                        \r