Couchdb filters support query parameters. It will be good to support this in the Elasticsearch couchdb river plugin. Details of the couchdb filters are documented at http://blog.couchone.com/post/468392274/whats-new-in-apache-couchdb-0-11-part-three-new. The parameters can be provider under: ``` { "couchdb" : { "filter" : "test", "filter_params" : { "param1" : "value1", "param2" : "value2" } } } ```