if (lastOperator instanceof AggregateOperator)
MyUtilities.printBlockingResult(_ID, (AggregateOperator) lastOperator,
_hierarchyPosition, _conf, LOG);
else
MyUtilities.printBlockingResult(_ID, lastOperator.getNumTuplesProcessed(),
lastOperator.printContent(), _hierarchyPosition, _conf, LOG);
}
}
protected abstract void printStatistics(int type);