I'm very excited about this! Without reading too much into this, is it safe to say it's like a self-hosted firebase?

"Due to the way deepstream structures its data (JSON blobs, identified by a primary key) it is recommendable to use an Object oriented or schema-less database (e.g. MongoDB or RethinkDB), rather than a relational database like MySQL."

Is there a way to run complex queries against the data or it designed to abstract that all away from you to be as fast as possible?