Using the _size field

In order to enable the _size field, set the mapping as follows:

		 PUT my-index-000001 {
  "mappings": {
    "_size": {
      "enabled": true
    }
  }
}

	

The value of the _size field is accessible in queries, aggregations, scripts, and when sorting. It can be retrieved using the fields parameter:

		 # Example documents PUT my-index-000001/_doc/1
{
  "text": "This is a document"
}

PUT my-index-000001/_doc/2
{
  "text": "This is another document"
}

GET my-index-000001/_search
{
  "query": {
    "range": {
      "_size": {                      1
        "gt": 10
      }
    }
  },
  "aggs": {
    "sizes": {
      "terms": {
        "field": "_size",             2
        "size": 10
      }
    }
  },
  "sort": [
    {
      "_size": {                      3
        "order": "desc"
      }
    }
  ],
  "fields": ["_size"],                4
  "script_fields": {
    "size": {
      "script": "doc['_size']"        5
    }
  }
}

	

Querying on the _size field
Aggregating on the _size field
Sorting on the _size field
Use the fields parameter to return the _size in the search response.
Uses a script field to return the _size field in the search response.

Using `_size` in {kib}

To use the _size field in Kibana, update the metaFields setting and add _size to the list of meta fields. metaFields can be configured in Kibana from the Advanced Settings page in Management.