用JAVA

Question

Elasticsearch嵌套聚集如何創建與ES JAVA API以下嵌套AGG查詢

比方說我的查詢看起來像以下：

GET /agg_vitaly_test_api_2016-11-01/_search 
    { 
    "size": 0, 
    "query": { 
      "range": { 
      "time": { 
       "gte": "1477962000000", 
       "lte": "1477965600000" 
      } 
      } 
    }, 
     "aggs" : { 
      "group_by_time" : { 
       "date_histogram" : { 
        "field" : "time", 
        "interval" : "hour" 
       }, 

       "aggs": { 
       "sum_player_load": { 
        "sum": { 
        "field": "playerload" 
        } 
       } 
      } 
     } 
    } 

Java代碼應somethink這樣的：

SearchRequestBuilder searchRequestBuilder = FETCH_CLIENT.prepareSearch().setIndices(indexName).setTypes(pixelType.getType()).setSize(0); 

      // here need to complete the nested aggregation.... 
      AggregationBuilder aggb = addAggregation(groupBy); 

     searchRequestBuilder.addAggregation(aggb); 

    // .... 
SearchResponse res = searchRequestBuilder.execute().actionGet(); 

請有什麼建議嗎？ :)

BR

Answer 1

你addAggregation方法是這樣的：

public AggregationBuilder addAggregation(){ 
     return AggregationBuilders.dateHistogram("group_by_time").field("time").interval(DateHistogram.Interval.HOUR) 
                     .subAggregation(AggregationBuilders.sum("sum_player_load").field("playerload")); 
}