ORA-13293：cannot specify unit for geometry without a georeferenced SRID
错误码
错误描述：cannot specify unit for geometry without a georeferenced SRID
错误原因：An Oracle Spatial function with a UNIT parameter was called on a geometry without a georeferenced SRID.
解决方法：Ensure that spatial functions with UNIT parameters are only called on geometries with georeferenced SRIDs.
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