Doubt - Oracle Spatial - Convert geometry 3D to 2D

  I would like to know if someone has a way to convert geometry from GTYPE 3d to 2d.

  For example:      3001 to 2001
                           3002 to 2002
                           3003 to 2003  ... and others.

  I need to do it in the Oracle Spatial - 10g version.

  I saw that in the 11g there is a command that does it.

Thanks
Eriovaldo

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