This patch changes the column_visitor so that it preservers the order of the partitions it visits when building the accumulation result. This is required by verbs such as get_range_slice, on top of which users can implement paging. In such cases, the last key returned by the query will be that start of the range for the next query. If that key is not actually the last in the partitioner's order, then the new request will likely result in duplicate values being sent. Ref #693 Signed-off-by: Duarte Nunes <duarte@scylladb.com> Message-Id: <1469568135-19644-1-git-send-email-duarte@scylladb.com>