If you query databases who support query folding, you’re probably very aware of every step you take and check if folding happens with every new step like so:
Folding will (usually) happen as long as “View Native Query” isn’t greyed out.
So when doing an inner join on tables whithin the same database, I was a bit surprised to see this greyed out actually. As according to the literature, it should fold.
But guess what? After I expanded a column from it, the folding was back again: