anchor.diff:           }
         }
      }
  -}'
  ---------------------------------------------------
  -
  +}
  +--------------------------------------------------
  +// CONSOLE
   <1> Custom date format
  
positive.code: 
  [source,js]
  --------------------------------------------------
  curl -XPOST "http://localhost:9200/_field_stats?level=indices" -d '{
     "fields" : ["answer_count"]
     "index_constraints" : {
        "creation_date" : {
           "min_value" : {
  
negative.code: 
  [source,js]
  --------------------------------------------------
  POST /_field_stats?level=indices
  {
     "fields" : ["rating"]
  }
  --------------------------------------------------
  // CONSOLE
  
  This is equivalent to the previous request.
  
  