GET /some-index/_search
{
  "query": {
    "match_all": {}
  },
  "docvalue_fields": [
    "my_ip*",                     
    {
      "field": "my_keyword_field" 
    },
    {
      "field": "*_date_field",
      "format": "epoch_millis"    
    }
  ]
}
