Elasticsearch sum_bucket，从结果中剥离中间聚合

Question

我有以下查询，其中

• 我执行第一项聚合，返回大量bucket
• 然后在此bucket上执行度量聚合（示例）
• 最后是sum_bucket聚合

当我运行此查询时，输出包含所有中间my_huge_bucket.my_huge_bucket_metric结果，但我只对sum_bucket度量感兴趣。

有没有办法从结果中去除中介聚合？

{
  "size": 0,
  "aggs": {
    "my_sum_bucket": {
      "sum_bucket": {
        "buckets_path": "my_huge_bucket.my_huge_bucket_metric"
      }
    },
    "my_huge_bucket": {
      "terms": {
        "field": "some_field",
        "size": 0
      },
      "aggs": {
        "my_huge_bucket_metric": {
          "avg": {
            "field": "some_field"
          }
        }
      }
    }
  }
}

Answer 1

刚刚了解了filter_path选项这正是我想要的

https://www.elastic.co/guide/en/elasticsearch/reference/2.3/common-options.html#_response_filtering