How oracle spatial deals with self-looping polylines?

Hi,folks
I have a general question on self-looping polylines.
If one polyline is self-closing, can oracle spatial recognize it as a line or polygon?
Anyone can give some hints on that?

HI!
Review this page:
http://download-west.oracle.com/docs/cd/A91202_01/901_doc/appdev.901/a88805/sdo_intr.htm#877625
They say that "Self-crossing polygons are not supported, although self-crossing line strings ARE supported. If a line string crosses itself, it does not become a polygon. A self-crossing line string does not have any implied interior."
Also, line strings are defined with their own SDO_GTYPE, such as "DL06" for MULTILINE or MULTICURVE, where POLYGON is "DL03" and MULTIPOLYGON is "DL07", so they can't be confused one with another.(See http://download-west.oracle.com/docs/cd/A91202_01/901_doc/appdev.901/a88805/sdo_objr.htm#1005537)

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Message was edited by:
frank.qian
Message was edited by:
frank.qian

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