Detect Custom SQL

In BOXI 3.1 SP6 I have some Webi reports that uses custom SQL.
 
I know you can show the SQL by using =DataproviderSQL[dp]
 
But, I would like to catch if a query uses custom SQL, so I could make a kind of warning to the user, this report uses custom SQL  Image may be NSFW.
Clik here to view.
 
Any suggestions on how to do this?