Thanks, Venkat. I wonder if using an SAP function as a data source in a data foundation is possible...and if it's the same as using it in Crystal Reports and Dashboards?
Within my data foundation in the Information Design Tool, when I select the Insert Tables... option, I see 15 containers labeled:
[ABAPF...] - [ABAPF...]
(There is also a 16th container labeled "[ABAPF...] - [Local...]". Under the [Local] container I see tables--tables wrapped in infosets, actually--that can be included in my data foundation.)
When I expand the "[ABAPPF...]" containers, I see many (perhaps thousands) of subcontainers and items, many having labels that start with the word "ABAPFunction".
I'm assuming "ABAPFunction" is equivalent to a function module, though I'm not sure. As I look through the list, it appears that at least some of the items are RFCs.
I haven't been able to find an item with a label that includes "READ_TEXT"--although, with so many items and with no search feature, the item might be in the list. Since this is a native function module, I would think it would be in the list somewhere.
So either the READ_TEXT function module is in the list and I can't find it...or it would seem that I need to "expose" this function module somehow--perhaps, as you suggest, by way of creating an RFC around it.
How difficult is it to create an RFC around a function module? I'm working in my development environment--where I have access to many SAP transactions.