presto-cassandra/src/main/java/io/prestosql/plugin/cassandra/CassandraMetadata.java/CassandraMetadata/finishInsert
class CassandraMetadata:    @Override
    public Optional<ConnectorOutputMetadata> finishInsert(ConnectorSession session, ConnectorInsertTableHandle insertHandle, Collection<Slice> fragments, Collection<ComputedStatistics> computedStatistics)
    {
        return Optional.empty();
    }