transform() support

git-svn-id: http://svn.osgeo.org/postgis/trunk@715 b70326c6-7e19-0410-871a-916f4a2858ee

diff --git a/lwgeom/lwpostgis.sql.in b/lwgeom/lwpostgis.sql.in
index 270856cbce809837d28a6d3724bce2841a52f6f1..bb7d90332aa4a0d65cc90caa1379c208f2aeea8f 100644 (file)
--- a/lwgeom/lwpostgis.sql.in
+++ b/lwgeom/lwpostgis.sql.in
@@ -11,6 +11,9 @@
 --  
 -- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
 -- $Log$
+-- Revision 1.5  2004/08/20 16:36:22  strk
+-- transform() support
+--
 -- Revision 1.4  2004/08/20 14:54:35  strk
 -- gist operators support functions renamed to allow for finer control by postgis_restore.pl
 --
@@ -954,13 +957,6 @@ CREATE TABLE geometry_columns (
                f_table_name, 
                f_geometry_column ) );
 
------------------------------------------------------------------------
--- GET_PROJ4_FROM_SRID( <srid> )
------------------------------------------------------------------------
-CREATEFUNCTION get_proj4_from_srid(integer) RETURNS text AS
-'SELECT proj4text::text FROM spatial_ref_sys WHERE srid= $1' 
-LANGUAGE 'sql' WITH (iscachable,isstrict);
-
 -----------------------------------------------------------------------
 -- RENAME_GEOMETRY_TABLE_CONSTRAINTS()
 -----------------------------------------------------------------------
@@ -1765,7 +1761,29 @@ END;
 LANGUAGE 'plpgsql' WITH (iscachable); 
 
 
+---------------------------------------------------------------
+-- PROJ support
+---------------------------------------------------------------
+
+CREATEFUNCTION get_proj4_from_srid(integer) RETURNS text AS
+'SELECT proj4text::text FROM spatial_ref_sys WHERE srid= $1' 
+LANGUAGE 'sql' WITH (iscachable,isstrict);
+
+CREATEFUNCTION transform_geometry(geometry,text,text,int)
+       RETURNS geometry
+       AS '@MODULE_FILENAME@','transform_geom'
+       LANGUAGE 'C' WITH (isstrict,iscachable);
+
+CREATEFUNCTION transform(geometry,integer) RETURNS geometry AS
+'BEGIN
+ RETURN transform_geometry( $1 , get_proj4_from_srid(SRID( $1 ) ), get_proj4_from_srid( $2 ), $2 );
+ END;'
+LANGUAGE 'plpgsql' WITH (iscachable,isstrict);
+
 
+---------------------------------------------------------------
+-- END
+---------------------------------------------------------------
 
 COMMIT;