So my understanding is that it's not possible to join tables (or create lookup columns) for Live Connections with cloud databases (like Amazon Redshift). I know I can set up Data Import instead, but that's not ideal because I would quickly run into trouble with reaching the row count quota.

This is the one and only reason why I can't completely replace Tableau with Zoho Analytics and it's very unfortunate.

Is it possible that I'm missing something? Or if not, is this something that may be developed any time soon?