How to incoporate a function module in data source based on view

Hi,

I need to develop a data source in R/3 based on a view (which is straight forward).

One field in the R/3 Z table will be in like this ‘20,070,709,110,000’

There is a function module developed in R/3 when executed will split the record(20,070,709,110,000) and display time & date

How can i incorporate this function module in data source so that the data and time records will be loaded to BW

Thanks