Elasticsearch: Return only nested inner_hits

Question

I have the following query:

GET /networkcollection/branch_routers/_search/
{
  "query": {
    "nested": {
      "path": "queries",
      "query": {
        "bool": {
          "must": [
            { "match": 
              { "queries.dateQuery": "20160101T200000.000Z" }
            }
          ]
        }
      },
      "inner_hits" : {}
    }
  }
}

This returns both the "hits" object (the entire document), as well as the "inner_hits" object (nested inside of hits).

Is there a way to for me to only return the matched "queries" element(s) which appear in the "inner_hits" results, without getting the whole document?

Answer 1

Should be able to achieve it by disabling source-field at top-level by specifying "_source" : false

POST /networkcollection/branch_routers/_search/
{
  "_source" : false,
  "query": {
    "nested": {
      "path": "queries",
      "query": {
        "bool": {
          "must": [
            { "match": 
              { "queries.dateQuery": "20160101T200000.000Z" }
            }
          ]
        }
      },
      "inner_hits" : {}
    }
  }
}