elasticsearc使用指南之ES管道聚合(Pipeline Aggregation)-百分比桶聚合

同级管道聚合，百分位管道聚合。其JAVA示例如下：

public static void test_Percentiles_buncket_aggregation() {
        RestHighLevelClient client = EsClient.getClient();
        try {
            SearchRequest searchRequest = new SearchRequest();
            searchRequest.indices("aggregations_index02");
            SearchSourceBuilder sourceBuilder = new SearchSourceBuilder();
            AggregationBuilder aggregationBuild = AggregationBuilders.terms("seller_agg")
                                                        .field("sellerId")
                                                        .subAggregation(AggregationBuilders.sum("seller_num_agg")
                                                                            .field("num")
                                                        )
                                                  ;
            sourceBuilder.aggregation(aggregationBuild);
            
            // 添加 avg bucket pipeline
            sourceBuilder.aggregation(new PercentilesBucketPipelineAggregationBuilder("seller_num_agg_av", "seller_agg>seller_num_agg"));
            sourceBuilder.size(0);
            
            searchRequest.source(sourceBuilder);
            SearchResponse result = client.search(searchRequest, RequestOptions.DEFAULT);
            System.out.println(result);
        } catch (Throwable e) {
            e.printStackTrace();
        } finally {
            EsClient.close(client);
        }
    }

其返回值如下：

{
  ...  // 省略其他属性
    "aggregations":{
        "lterms#seller_agg":{
            "doc_count_error_upper_bound":0,
            "sum_other_doc_count":12,
            "buckets":[
                {
                    "key":45,
                    "doc_count":567,
                    "sum#seller_num_agg":{
                        "value":911
                    }
                },
                {
                    "key":31,
                    "doc_count":324,
                    "sum#seller_num_agg":{
                        "value":353
                    }
                } // 省略其他桶的显示
            ]
        },
        "percentiles_bucket#seller_num_agg_av":{
            "values":{
                "1.0":5,
                "5.0":5,
                "25.0":10,
                "50.0":20,
                "75.0":290,
                "95.0":911,
                "99.0":911
            }
        }
    }
}