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copied!<p>Afaik you cannot do this through the HTTP api, </p> <p>As Christian mentioned you can use a range query, but you don't need a alternative index as you already have the primary key index which can be referenced by <code>$key</code> as index field:</p> <pre><code>olav@nyx ~ (master *%) » curl http://nyx:8098/riak/test/20120931 -d "31. Sep 2012" olav@nyx ~ (master *%) » curl http://nyx:8098/riak/test/20121002 -d "02. Oct 2012" olav@nyx ~ (master *%) » curl http://nyx:8098/riak/test/20121021 -d "21. Oct 2012 olav@nyx ~ (master *%) » curl http://nyx:8098/riak/test/20121102 -d "The future" olav@nyx ~ (master *%) » curl -X POST -H "content-type: application/json" \ -d @- http://localhost:8098/mapred \ <<EOF { "inputs":{ "bucket":"test" , "index":"\$key" , "start":"20121001" , "end":"20121101" } , "query":[{ "reduce":{ "language":"erlang" , "module":"riak_kv_mapreduce" , "function":"reduce_identity" , "keep":true } }] } EOF # ... [["test","20121021"],["test","20121002"]] </code></pre> <p>If you really want key filters with you can use Erlang pb client and do something along these lines (you need <code>riak_kv</code> in your codepath):</p> <pre><code>{ok, Pid} = riakc_pb_socket:start_link("127.0.0.1", 8087), Index = {index, <<"test1">>, <<"field_int">>, <<"123">>}, {ok, Filter} = riak_kv_mapred_filters:build_filter([[<<"ends_with">>,"1"]]). MapReduce = [ { reduce , {qfun, fun(X, F) -> lists:filter(fun({A, B}) -> F(B) end, X) end} , riak_kv_mapred_filters:compose(Filter) , true}], riakc_pb_socket:mapred(Pid, Index, MapReduce). </code></pre>

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