At Firebase we sometimes pondered the feasibility of a SQL version, but the semantics of SQL seem littered with semantic footguns that don't lend themselves to offline, secure, scalable and event driven distributed applications. We know everybody wanted better query expressivity but delivering that in a mobile friendly, clienside, secure package was very difficult to see the path to.

tripletstore/datalog actually seems like a decent compromise between SQL and no-SQL that could actually work out! Awesome idea!