geo_collect_garray geo_makeline_garray geo_npoints geom_array_union geom_boundary geom_buffer geom_centroid geom_convex_hull geom_difference2d geom_intersection2d geom_shortestline2d geom_shortestline3d geom_unary_union line_interpolate_point line_locate_point line_substring

geom_difference2d() GSERIALIZED * geom_difference2d ( const GSERIALIZED *  gs1, const GSERIALIZED *  gs2  ) Return the difference of two geometries. Parameters [in] gs1,gs2 Geometries Note PostGIS function: ST_Difference(PG_FUNCTION_ARGS). With respect to the original function we do not use the prec argument.