RQL — It tells you what it will do, before it does it

Press compile and it does not answer valid or invalid. It tells you what is about to happen — and most of that is good news, so it is not written like an apology: Margin is a Formula, so this term can't compile to SQL. The run will sample — and say so. 3 of 4 terms pushed to the database. This is the same discipline as the rest of the product: a read that hit its ceiling says it sampled rather than presenting a prefix as an answer. RQL just says it before you spend the time.