twittner/cql — pull request #2 by romanb (2014-05-27 14:45:50+00:00)
Title: Constraint batch queries to type 'W'.

Batch queries may only contain DML statements (insert/update/delete) which corresponds to type `W`. cf [CQL Spec v2](https://github.com/apache/cassandra/blob/trunk/doc/native_protocol_v2.spec#L347).