BUG: Querying a Spatial column returns "Error while trying to retrieve text for error ORA-21500" in PL/SQL Developer 9.0.6.1665. This worked in PL/SQL Developer 8, it would simply break down the SHAPE field into fields as follows:
SHAPE.SDO_GTYPE
SHAPE.SDO_SRID
SHAPE.SDO_POINT.X
SHAPE.SDO_POINT.Y
SHAPE.SDO_POINT.Z
SHAPE.SDO_ELEM_INFO
SHAPE.SDO_ORDINATES
I also highly suggest working on incoperating GeoRaptor into the PL/SQL Developer engine.
http://sourceforge.net/apps/mediawiki/georaptor/index.php?title=Main_Page
Thanks in advance!
--Mike