drill-class             Class 'drill' defines a Apache Drill driver
                        class.
rd_active               To show whether the connection is active.
rd_metrics              Show the information of the memory metrics.
rd_options              Show the information of the system and session
                        options such as name and data type and so
                        forth.
rd_profiles             Show the information about the running and
                        completed queries.
rd_query                Submit a SQL query and return results as a data
                        frame.
rd_stats                Show the information of Drillbits, their ports
                        and hosts.
rd_storages             Show the configurations of the storage plugins.
rd_threads              Show the information of the threads status.
rdrill                  Get the Apache Drill Connection, return the
                        RDrill object.
