Question

I have a problem with implementing database table library. I have a class Column storing different types.

template <class T>
class Column : iColumn<T>
{ 
... 
}

Table is composed of columns, so I need a collection of them (map with string name as a key and column as value). How shall I implement one collection of all table’s columns regardless the template type?

Thanks for any hep.

Answer 1

You should have a common interface.

class Column<T>: public IColumn {
  ...
};

std::map<std::string,IColumn*> columns;