couchdb-mango-index

{
  "total_rows": 2,
  "indexes": [ 
    {
      "ddoc": null,
      "name": "_all_docs",
      "type": "special",
      "def": {
      "fields": [
      {
        "_id": "asc"
      }]
    }
},
{
  "ddoc": "_design/poll-mango",
  "name": "getPoll",
  "type": "json",
  "def": {
    "fields": [{
      "ClassName": "asc"
      },
      {
      "House": "asc"
      },
      {
      "Date": "asc"
      }],
  "partial_filter_selector": {
    "ClassName": {
      "$eq": "sl_poll"
    }
  }
  }
  }
  ]
}

mango-query

{
   "selector": {
      "House.Initials": "CD"
   },
   "fields": [
      "ClassName",
      "Date"
   ],
   "use_index": "poll-mango"
}