Returns {@code true} if the results must be ordered by relevance. If {@code false}, then the results are sorted by the natural Cassandra's order. Results must be ordered by relevance if the querying condition is not {code null}.
Relevance is used when the query condition is set, and it is not used when only the clusteringKeyFilter condition is set.
@return {@code true} if the results must be ordered by relevance. If {@code false}, then the results must be sorted by the natural Cassandra's order.