I haven't seen a discussion of whether an analog to sql window functions (e.g. rank(), dense_rank(), cume_dist(), ntile(), etc... ) exists in Datomic. Does something akin to what an over(partition by ... order by ...) clause accomplishes in Datomic exist? If so, where can I read up about it? Thanks in advance (e.g. https://www.postgresql.org/docs/10/static/functions-window.html)