private void SetLastIterator(AlgebraNode owner, Iterator iterator)
{
if (_includeStatistics && owner.StatisticsIterator == null)
{
owner.StatisticsIterator = new StatisticsIterator();
owner.StatisticsIterator.RowBuffer = iterator.RowBuffer;
owner.StatisticsIterator.Input = iterator;
iterator = owner.StatisticsIterator;
}
_lastIterator = iterator;
}
private Iterator GetLastIterator()
{
Iterator result = _lastIterator;
_lastIterator = null;
return result;
}
