Speaking of SQL alternatives, Datalog seems to be another language that leverages relational model. I love how straightforward and expressive Datalog is. I won

Speaking of SQL alternatives, Datalog seems to be another language that leverages relational model. I love how straightforward and expressive Datalog is. I wonder, why Datalog is not very popular for databases as a query language? Is it because of performance optimization? Could anyone provide some insights?