code: @Override
  	public long blocksAccessed() {
  		double rpb = (double) (Buffer.BUFFER_SIZE / RecordPage.slotSize(p.schema()));
  		return (int) Math.ceil(p.recordsOutput() / rpb);
  	}
docs: Returns the estimated number of blocks in the materialized table. It does
  <em>not</em> include the one-time cost of materializing the records.
  
  @see Plan#blocksAccessed()