Type String to DateTime

Hi Experts,

  I need to change the datatype in  IDT(information design tool) my source is Oracle. From the Date Dimension object, i am getting the date formate as 20-SEP-2015 which is of  type string i need to convert to same date format with only datetype change as datetime@the Universe Level

Using Oracle 11g and IDT 4.1

Thanks,

Dinya.