3D sdo_util.reverse_linestring

Question

Hello,
Does anyone know how is it possible to reverse a non-LRS 3D geometry (SDO_GTYPE = 3002)?
The User Guide (for 10g and 11g) says that's only possible for non-LRS 2D geometries (SDO_GTYPE = 2002)...
Thanks in advance.

Answer 1

sdo_util.reverse_linestring doesn't seem to work for 3002. You could always convert into into an LRS geometry, then use SDO_LRF.REVERSE_GEOMETRY_3D and then convert it back again. Or you could roll your own reverse function.
idle> select * from v$version;
BANNER
Oracle Database 10g Express Edition Release 10.2.0.1.0 - Product
PL/SQL Release 10.2.0.1.0 - Production
CORE    10.2.0.1.0      Production
TNS for 32-bit Windows: Version 10.2.0.1.0 - Production
NLSRTL Version 10.2.0.1.0 - Production
5 rows selected.
idle> SELECT sdo_util.reverse_linestring(
  2  SDO_GEOMETRY(2002, NULL, NULL, SDO_ELEM_INFO_ARRAY (1,2,1), SDO_ORDINATE_ARRAY (10,10, 20,20, 30,30))) "This works"
  3  FROM dual;
This works(SDO_GTYPE, SDO_SRID, SDO_POINT(X, Y, Z), SDO_ELEM_INFO, SDO_ORDINATES)
SDO_GEOMETRY(2002, NULL, NULL, SDO_ELEM_INFO_ARRAY(1, 2, 1), SDO_ORDINATE_ARRAY(30, 30, 20, 20, 10, 10))
1 row selected.
idle>
idle> SELECT sdo_util.reverse_linestring(
  2  SDO_GEOMETRY(3002, NULL, NULL, SDO_ELEM_INFO_ARRAY (1,2,1), SDO_ORDINATE_ARRAY (10,10,5, 20,20,4, 30,30,3)) ) "This does not work"
  3  FROM dual;
This does not work(SDO_GTYPE, SDO_SRID, SDO_POINT(X, Y, Z), SDO_ELEM_INFO, SDO_ORDINATES)
SDO_GEOMETRY(3002, NULL, NULL, SDO_ELEM_INFO_ARRAY(1, 2, 1), SDO_ORDINATE_ARRAY(10, 10, 5, 20, 20, 4, 30, 30, 3))
1 row selected.