Description. This method is used to obtain a column definition, given either the index or the name of the column.
Signature. This method can be invoked using either the column ID or column name, as shown here:
Column* getColumn ( const int AttributeId ) Column* getColumn ( const char* name )
Either of: the column's index in the table (as it would be
returned by the column's
method), or the name of the column.
A pointer to the column with the specified index or name. If
there is no such column, then this method returns