No way to bind aggregate to variable in query

[gburd]

The datomic docs have an example query of the form:

[:find ?year (median ?namelen) (avg ?namelen) (stddev ?namelen)
 :with ?track
 :where [?track :track/name ?name]
        [(count ?name) ?namelen]
        [?medium :medium/tracks ?track]
        [?release :release/media ?medium]
        [?release :release/year ?year]]

Our query syntax doesn't allow the [(count ?name) ?namelen] clause.

Between this and mozilla#647 I'm not sure we can implement a top-sites like query directly. (That might not be true, and could just a reflection of my ignorance, though!)

Original by @thomcc

[gburd]

Possibly a duplicate of mozilla#750?

Original by @thomcc

[gburd]

Yep, dupe of that.

Original by @rnewman