question: public static Tuple min ( TupleSet tuples , String field , Comparator cmp ) { if ( tuples instanceof Table ) { Table table = ( Table ) tuples ; ColumnMetadata md = table . getMetadata ( field ) ; return table . getTuple ( md . getMinimumRow ( ) ) ; } else { return min ( tuples . tuples ( ) , field , cmp ) ; } }
target:  Get the Tuple with the minimum data field value.