文档解释
ORA-22339: cannot alter to not final since its attribute column is substitutable
Cause: An attempt was made to alter a type to not final when its embedded attribute is defined as substitutable in some tables. Note, this is a restriction in 9.0 version because when a type is altered to not final, column of that type is set to not substitutable at all levels; thus, it is an error if one of its embedded attribute column is already marked substitutable.
Action: Recreate the table and specify NOT SUBSTITUTABLE AT ALL LEVELS for all columns of non final type. Then resubmit the ALTER TYPE statement.
