private AggregateColumn(AggregateColumn column, int newIndex)
: base(column.Name, newIndex, column.Type, column)
{
AggregateType = column.AggregateType;
SourceIndex = column.SourceIndex;
}
private AggregateColumn(AggregateColumn column, string newName)
: base(newName, column.Index, column.Type, column)
{
AggregateType = column.AggregateType;
SourceIndex = column.SourceIndex;
}