PostGIS 1.5.8 Manual - Fedora Project Packages GIT repositories

PostGIS 1.5.8 Manual128 / 3107.5.12 ST_MultiST_Multi — Returns the geometry as a MULTI* geometry. If the geometry is already a MULTI*, it is returned unchanged.Synopsisgeometry ST_Multi(geometry g1);DescriptionReturns the geometry as a MULTI* geometry. If the geometry is already a MULTI*, it is returned unchanged.ExamplesSELECT ST_AsText(ST_Multi(ST_GeomFromText(’POLYGON((743238 2967416,743238 2967450,743265 2967450,743265.625 2967416,743238 2967416))’)));st_astext-----------------------------------------------------------------------------------------------MULTIPOLYGON(((743238 2967416,743238 2967450,743265 2967450,743265.625 2967416,743238 2967416)))(1 row)See AlsoST_AsText7.5.13 ST_RemovePointST_RemovePoint — Removes point from a linestring. Offset is 0-based.Synopsisgeometry ST_RemovePoint(geometry linestring, integer offset);DescriptionRemoves point from a linestring. Useful for turning a closed ring into an open line stringAvailability: 1.1.0This function supports 3d and will not drop the z-index.Examples--guarantee no LINESTRINGS are closed--by removing the end point. The below assumes the_geom is of type LINESTRINGUPDATE sometableSET the_geom = ST_RemovePoint(the_geom, ST_NPoints(the_geom) - 1)FROM sometableWHERE ST_IsClosed(the_geom) = true;