That would depend on the database I suppose.

(d/q [:find ?e :where [?e :my/attribute _]] db) ? Maybe direct index access is faster!? (index-pull)

:thumbsup:

I happened to have a need for this today and came up with

(defn has-attr? [db eid attr]
  (-> db
      ^Iterable (d/datoms :eavt eid attr)
      .iterator
      .hasNext))

for datalevin I found there is d/eid . My use case was checking if an indexed entity exists