private void UpdateAggregateRow(object[] row, object[] n, int len)
{
for (int i = 0; i < len; i++)
{
ColumnType type = eColumn[i].ColumnType;
switch (eColumn[i].Type)
{
case ExpressionType.Average:
case ExpressionType.Sum:
case ExpressionType.Count:
row[i] = Column.Sum(row[i], n[i], type);
break;
case ExpressionType.Minimum:
row[i] = Column.Min(row[i], n[i], type);
break;
case ExpressionType.Maximum:
row[i] = Column.Max(row[i], n[i], type);
break;
default:
row[i] = n[i];
break;
}
}
}