I have a partition table that is partitioned by date. the last partition has a high value of 6/1/02. I want to change that to 8/1/02. How do I do it? Here is what I think:

alter table mytable
modify partition PART_MAY2002
high_value to_date('20020801','YYYYMMDD');

Here is the error I get
*
ERROR at line 3:
ORA-14049: invalid ALTER TABLE MODIFY PARTITION option