ElasticSearch長期聚集

我送這個請求ES：ElasticSearch長期聚集

{ 
    "aggregations" : { 
    "followUpActivity.metainfo.metainfos.date1" : { 
     "terms" : { 
     "field" : "metainfos.date1", 
     "missing" : "2016-07-20T13:59:06.208Z", 
     "order" : { 
      "_count" : "desc" 
     } 
     } 
    } 
    } 
}

這是結果：

{ 
    "took":1, 
    "timed_out":false, 
    "_shards":{ 
    "total":1, 
    "successful":1, 
    "failed":0 
    }, 
    "hits":{ 
    "total":5, 
    "max_score":1.0, 
    "hits":[ 
     { 
     "_index":"living_v1", 
     "_type":"fuas", 
     "_id":"4a4137ec-48fe-11e6-9f47-30b5c2122322", 
     "_score":1.0, 
     "_routing":"living_team", 
     "_source":{ 
      "user":"living_team", 
      "timestamp":"2016-07-13T15:04:15.548Z", 
      "metainfos":{ 
      "string1":[ 
       "s1", 
       "s2" 
      ] 
      } 
     } 
     }, 
     { 
     "_index":"living_v1", 
     "_type":"fuas", 
     "_id":"4d526f8d-48fe-11e6-9f47-30b5c2122322", 
     "_score":1.0, 
     "_routing":"living_team", 
     "_source":{ 
      "user":"living_team", 
      "timestamp":"2016-07-13T15:37:24.471Z", 
      "metainfos":{ 
      "string1":[ 
       "s1", 
       "s2" 
      ] 
      } 
     } 
     }, 
     { 
     "_index":"living_v1", 
     "_type":"fuas", 
     "_id":"89fc1180-48fe-11e6-9f47-30b5c2122322", 
     "_score":1.0, 
     "_routing":"living_team", 
     "_source":{ 
      "user":"living_team", 
      "timestamp":"2016-07-13T13:43:18.566Z", 
      "metainfos":{ 
      "string1":[ 
       "s3" 
      ] 
      } 
     } 
     }, 
     { 
     "_index":"living_v1", 
     "_type":"fuas", 
     "_id":"7168393b-4daf-11e6-83ba-30b5c2122322", 
     "_score":1.0, 
     "_routing":"living_team", 
     "_source":{ 
      "user":"living_team", 
      "timestamp":"2016-07-19T14:04:14.175Z", 
      "metainfos":{ 
      "date1_ldate":[ 
       "2016-07-19T12:59:55.442Z" <<<<<<<<<<<<<<<<<<<<<< 
      ] 
      } 
     } 
     }, 
     { 
     "_index":"living_v1", 
     "_type":"fuas", 
     "_id":"7af3f44f-48fe-11e6-9f47-30b5c2122322", 
     "_score":1.0, 
     "_routing":"living_team", 
     "_source":{ 
      "user":"living_team", 
      "timestamp":"2016-07-13T14:18:49.328Z", 
      "metainfos":{ 
      "string1":[ 
       "s2" 
      ], 
      "num1":[ 
       12.0, 
       13.0 
      ], 
      "date1_ldate":[ 
       "2016-07-19T13:04:55.467Z", <<<<<<<<<<<<<<<<< 
       "2016-07-20T12:44:32.116Z"  <<<<<<<<<<<<<<<<< 
      ] 
      } 
     } 
     } 
    ] 
    }, 
    "aggregations":{ 
    "followUpActivity.metainfo.metainfos.date1":{ 
     "doc_count_error_upper_bound":0, 
     "sum_other_doc_count":0, 
     "buckets":[ 

     ] 
    } 
    } 
}

正如你可以看到metainfos.date1_ldate是在兩個文件，但是水桶通知結果是空的。

我在做什麼錯？

來源

2016-07-20 Jordi

該字段名稱是date1_ldate而不是date1。所以，你需要"terms" : { "field" : "metainfos.date1_ldate"。

來源

2016-07-20 14:12:11

對不起！正如你所猜測的，我正在使用Java API構建這個請求。在改變我的拼寫錯誤之後，我意識到ES Java API返回一個'LongTerms'而不是某種'DateTerms'。你知道我應該如何處理這個「LongTerms」聚合以獲得我的日期？ – Jordi

Hm ...內部ES將日期存儲爲時間戳，表示長數字值。從查看[LongTerms的源代碼]（https://github.com/elastic/elasticsearch/blob/master/core/src/main/java/org/elasticsearch/search/aggregations/bucket/terms/LongTerms .java＃L33）我看到它的用意就是當你看到它時使用它 - 用於日期字段。所以這是預期的行爲。我建議使用[可以接收'long'的構造函數之一]轉換爲'java.util.Date'（https://docs.oracle.com/javase/7/docs/api/java/sql/Date。 HTML＃日期（長））。 –

我明白了。嗯，有沒有辦法檢查長桶價值來源是日期還是長期？ – Jordi

ElasticSearch長期聚集

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