I'm thinking of 2.1 (you can't indeed in 2.0).
I'm closing this for now as it's not a very common request, the implementation is debated and there is a workaround in 2.1.
If we see more demand for that we'll reopen.
Reopening because there is demand for this feature on the mailing list: https://groups.google.com/a/lists.datastax.com/forum/#!topic/java-driver-user/4Rm5U57sJHA
Duy Hai suggested using a dedicated logger like in Achilles: https://github.com/doanduyhai/Achilles/wiki/Statements-Logging-and-Tracing
Closing again, since will provide the missing parts to extract the values yourself:
Furthermore, the most likely use for this is to log queries, that will be covered by JAVA-646.