CSharp/Spark/Impala: retrieve complex columns when SELECT * is queried

[birschick-bq]

What feature or improvement would you like to see?

For the Spark/Impala driver, currently if a query that includes the wildcard * projection (i.e., SELECT * FROM table), it does not retrieve complex columns, by default.

This is a server behavior that can be controlled by a server setting.

However, other driver implementations are able to return all columns (include those with complex types) in such a query without having to change the server setting.

This enhancement request is to have the ability, client-side, to retrieve all columns, regardless of type when a SELECT * query is performed.