easier prefix searching with get_range_slices
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                 Key: CASSANDRA-855
                 URL: https://issues.apache.org/jira/browse/CASSANDRA-855
             Project: Cassandra
          Issue Type: Improvement
          Components: Core
            Reporter: Robert Edmonds
            Priority: Minor


it would be nice if there were a SlicePredicate which could perform prefix 
searching.

it would be nice if there were an easier way to perform prefix searches with 
get_range_slices.

e.g., if keys "foo", "bar", "baz", "quux" are present, retrieve only the keys 
starting with "ba". this is currently possible by using a SliceRange predicate 
with start="ba" and finish="bb", but calculating the next lowest key after the 
prefix isn't necessarily trivial.

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