Calling an sql function in Power Bi Report Builder

Hi,

We have sql functions in our Oracle db that I would like to call from the dataset. I can create a report using plain sql and see that there is a place to call a stored procedure from the datasets, but I need to call an existing sql function. Can someone please direct me to any documentation on that?  Looking for format for the sql function call in Power Bi Report Builder.

Thanks

Maureen