EQL is surely a great alternative to Graphql because of namespaced keywords and rich data structure (in contrast of Graphql's string base). It is also inspired by Datomic's Pull API. However, it's a specification and the most popular imlementation (Pathom) has nothing to do with Datalog.
The original question made this mistake probably because the poster didn't know it but Pathom is the actual alternative to GraphQL-based APIs.
Datalog solves a subtly different problem of querying the data, while Pathom/GraphQL/REST is about exposing the data (interfacing?) as API.
It's more like:
Pathom vs GraphQL-based API (vs REST)
and
Datalog vs SQL (vs NoSQL)
The mainstream is in the process of migrating from REST to GraphQL, but I think Pathom could be the black horse in this race.
Just watch the last part of Wilker Silva's The Maximal Graph talk to see the potential:
https://youtu.be/IS3i3DTUnAI?t=2080
