I am trying to understand how PowerBI desktop does data preview while loading full data into dataset. At the moment it looks like that PowerBI will do two requests: once to do the preview, second to load data into dataset. I would like to optimize this, so preview request does not trigger full export job in my API.
Ideally, I would like to be able to provide some query parameter indicating that given request is only for the preview so I can respond with some small / static data chunk.