def METHOD_NAME(self) -> None:
    query_metadata1 = QueryMetadata(sql="select * from table a where a.field == 'x Y z'",
                                    tables=[self.table_metadata])
    query_metadata2 = QueryMetadata(sql="select * from table a where a.field == 'x y z'",
                                    tables=[self.table_metadata])
    self.assertNotEqual(query_metadata1.get_key_self(), query_metadata2.get_key_self())