ORA-19036: Invalid query result set in newContextFromHierarchy()
Cause: The result set of the query used in the newContextFromHierarchy() does not have the same property as the result set generated by a CONNECT BY query.
Action: Make sure the query used in newContextFromHierarchy() is a CONNECT BY query or the query returns the result set have the same property as the result set generated by a CONNECT BY query.
https://support.oracle.com/
http://www.oracle.com/