Table partition: question

Hi all,
I have a question:
It is possibile to use a SQL function (like SubStr) in the partition by Hash clause of a Create table sentence?
Ex: if I try

    Create Table a(

        info VARCHAR(8) Not Null
    )
    PARTITION BY HASH (SubStr(info,5,2))     PARTITIONS 12
I obtain an error: ORA-00900 invalid SQL Statement. Can anyone help me?
Thank you.
G Received on Mon Jul 19 2004 - 05:08:37 CDT