Deserializes first n columns from the given Row and returns them as
a CassandraRow object.
Deserializes first n columns from the given Row and returns them as
a CassandraRow object. The number of columns retrieved is determined by the length
of the columnNames argument. The columnNames argument is used as metadata for
the newly created CassandraRow, but it is not used to fetch data from
the input Row in order to improve performance. Fetching column values by name is much
slower than fetching by index.
Creates a CassandraRow object from a map with keys denoting column names and values denoting column values.