Method compare

src/java/simpledb/execution/OrderBy.java:117–126

(Tuple o1, Tuple o2)

    }

    public int compare(Tuple o1, Tuple o2) {
        Field t1 = (o1).getField(field);
        Field t2 = (o2).getField(field);
        if (t1.compare(Predicate.Op.EQUALS, t2))
            return 0;
        if (t1.compare(Predicate.Op.GREATER_THAN, t2))
            return asc ? 1 : -1;
        else
            return asc ? -1 : 1;
    }
    
}