Getting point ordinates using sdo_intersection

I have two crossing lines. I try to get point of crossing using spatial function SDO_INTERSECTION. I got it, but ordinates was null.
I don't know why.
geom_edge1 := MDSYS.SDO_GEOMETRY(2002,NULL,NULL,MDSYS.SDO_ELEM_INFO_ARRAY(1,2,1),MDSYS.SDO_ORDINATE_ARRAY(-654713,-1021390,-767748,-1011681));
geom_edge2 := MDSYS.SDO_GEOMETRY(2002,NULL,NULL,MDSYS.SDO_ELEM_INFO_ARRAY(1,2,1),MDSYS.SDO_ORDINATE_ARRAY(-727527,-983943,-730301,-1083802));
select MDSYS.SDO_GEOM.SDO_INTERSECTION(geom_edge1, geom_edge2, 0.005) into geom_intersection from dual;
X := geom_intersection.SDO_POINT.X;
Y := geom_intersection.SDO_POINT.Y;
I have oracle version 9.2.0.6.
Thank you for replay.

I already found solution - for geometry of intersection I must ask for SDO_ORDINATES, not SDO_POINT.

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And I also tried to use SQL to get the result.But it
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http://www.sappoint.com/abap/ale2.pdf
http://www.sapdevelopment.co.uk/training
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