Method open

src/java/simpledb/execution/Filter.java:48–60

()

    }

    public void open() throws DbException, NoSuchElementException,
            TransactionAbortedException {
        // some code goes here
        child.open();
        while(child.hasNext()){
            Tuple next = child.next();
            if(predicate.filter(next)){
                childTuple.add(next);
            }
        }
        it = childTuple.iterator();
        super.open();
    }

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