title: Retrieve data without _source field:
body: <p>I'm new in elasticsearch, I am doing a match all query and it retrieves the data in this way but only I want the data in retrieved in the _source, how can I do it? any idea abot it?</p>
  
  <pre><code>    {
    "took": 4,
    "timed_out": false,
    "_shards": {
      "total": 5,
      "successful": 5,
      "failed": 0
    },
    "hits": {
      "total": 107271,
      "max_score": 1,
      "hits": [
        {
          "_index": "sku_index",
          "_type": "po",
          "_id": "0",
          "_score": 1,
          "_source": {
            "loc": "ZZZ",
            "part": "PPP",
            "order_qty": "16",
          }
        },
        {
          "_index": "sku_index",
          "_type": "po",
          "_id": "14",
          "_score": 1,
          "_source": {
            "loc": "ZZZ",
            "part": "XXX",
            "order_qty": "7",
          },
  {
              "_index": "sku_index",
              "_type": "po",
              "_id": "14",
              "_score": 1,
              "_source": {
                "loc": "ZZZ",
                "part": "ZZZ",
                "order_qty": "7",
              }
            }
        .......
  </code></pre>
  
  <p>I wnat something like this:</p>
  
  <pre><code>      [{
            "loc": "ZZZ",
            "part": "PPP",
            "order_qty": "16",
          },
         {
            "loc": "ZZZ",
            "part": "XXX",
            "order_qty": "16",
          },
        {
            "loc": "ZZZ",
            "part": "ZZZ",
            "order_qty": "7",
          }
        ]
  </code></pre>