mydl
The project is a prtotype Datalog engine. It supports stratified dataglog with negation and aggregation and supports aggregation in recursion. It implements the semi-naive evaluation algorithm. It builds on the relation database system. A Datalog program executes iteratively, this engine controls the iteration loop, and in each iteration each Datalog rule is translated into a SQL statement which is sent to the relation database system to exectue query.