ORA-22901: cannot compare nested table or VARRAY or LOB
attributes of an object type



ORA-22901: cannot compare nested table or VARRAY or LOB attributes of an object type..

Answer / guest

Cause: Comparison of nested table or VARRAY or LOB
attributes of an object type was attempted in the absence of
a MAP or ORDER method.

Action: define a MAP or ORDER method for the object type.

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