Method getTupleDesc

src/java/simpledb/execution/Aggregate.java:179–182

Returns the TupleDesc of this Aggregate. If there is no group by field, this will have one field - the aggregate column. If there is a group by field, the first field will be the group by field, and the second will be the aggregate value column. The name of an aggregate column should be informat

()

     * iterator.
     */
    public TupleDesc getTupleDesc() {
        // some code goes here
        return opIterator.getTupleDesc();
    }

    public void close() {
        // some code goes here