HTTP Secondary Indexes
Secondary Indexes allows an application to tag a Riak object with one or more field/value pairs. The object is indexed under these field/value pairs, and the application can later query the index to retrieve a list of matching keys.
Request
Exact Match
GET /buckets/mybucket/index/myindex_bin/value
Range Query
GET /buckets/mybucket/index/myindex_bin/start/end
Range query with terms
To see the index values matched by the range, use return_terms=true.
GET /buckets/mybucket/index/myindex_bin/start/end?return_terms=true
Pagination
Add the parameter max_results for pagination. This will limit the results and provide for the next request a continuation value.
GET /buckets/mybucket/index/myindex_bin/start/end?return_terms=true&max_results=500
GET /buckets/mybucket/index/myindex_bin/start/end?return_terms=true&max_results=500&continuation=g2gCbQAAAAdyaXBqYWtlbQAAABIzNDkyMjA2ODcwNTcxMjk0NzM=
Streaming
GET /buckets/mybucket/index/myindex_bin/start/end?stream=true
Response
Normal status codes:
200 OK
Typical error codes:
400 Bad Request- if the index name or index value is invalid.500 Internal Server Error- if there was an error in processing a map or reduce function, or if indexing is not supported by the system.503 Service Unavailable- if the job timed out before it could complete
Example
$ curl -v http://localhost:8098/buckets/mybucket/index/field1_bin/val1
* About to connect() to localhost port 8098 (#0)
* Trying 127.0.0.1... connected
* Connected to localhost (127.0.0.1) port 8098 (#0)
> GET /buckets/mybucket/index/field1_bin/val1 HTTP/1.1
> User-Agent: curl/7.19.7 (universal-apple-darwin10.0) libcurl/7.19.7 OpenSSL/0.9.8r zlib/1.2.3
> Host: localhost:8098
> Accept: */*
>
< HTTP/1.1 200 OK
< Vary: Accept-Encoding
< Server: MochiWeb/1.1 WebMachine/1.9.0 (participate in the frantic)
< Date: Fri, 30 Sep 2011 15:24:35 GMT
< Content-Type: application/json
< Content-Length: 19
<
* Connection #0 to host localhost left intact
* Closing connection #0
{"keys":["mykey1"]}%