Description

It'd be lovely is a filters or filter agg that touches a constant_keyword would properly rewrite itself to match_all and match_none and "go fast", at least when it's at the root of the aggs tree. Theoretically it should "just work" but it doesn't seem to. Also! The terms agg should be able to act on there being only a single possible value. Maybe it can even act on the match_all/match_none nature of the constant_keyword. I'm not sure how, but it does feel like there are optimizations in there. Particularly when terms is the top level agg.