Method open

src/java/simpledb/execution/OpIterator.java:23–23

Opens the iterator. This must be called before any of the other methods. @throws DbException when there are problems opening/accessing the database.

()

   * @throws DbException when there are problems opening/accessing the database.
   */
  void open()
      throws DbException, TransactionAbortedException;

  /** Returns true if the iterator has more tuples.