This is among the most shallow comment I ever saw on HN. Just because `TreeSet a = [1,2,3]` is surrounded by [ and ] does that mean `a` is a list? When you do `

This is among the most shallow comment I ever saw on HN. Just because `TreeSet a = [1,2,3]` is surrounded by [ and ] does that mean `a` is a list? When you do `jsonb j = '{"a":"c"}` postgres builds a separate data structure for you from that json, which allows you to use a btree index.