Elasticsearch 2：我可以按键过滤术语聚合吗？

Question

是否可以按键过滤术语聚合？我在数组字段上进行了术语聚合，这导致了许多不必要的存储桶。 （即使我在查询中应用了过滤器）

例如，对于这样的结果：

{
"took" : 3,
"timed_out" : false,
"_shards" : {
    "total" : 5,
    "successful" : 5,
    "failed" : 0
},
"hits" : {
    "total" : 9928,
    "max_score" : 0.0,
    "hits" : [ ]
},
"aggregations" : {
    "variables" : {
        "buckets" : [ {
            "key" : "00",
            "doc_count" : 158
        }, {
            "key" : "1",
            "doc_count" : 158
        }, {
            "key" : "2",
            "doc_count" : 158
        }, {
            "key" : "3",
            "doc_count" : 158
        }, {
            "key" : "4",
            "doc_count" : 158
        }, {
            "key" : "5",
            "doc_count" : 158
        }, {
            "key" : "6",
                "doc_count" : 156
        }, {
            "key" : "7",
                "doc_count" : 127
        }, {
            "key" : "8",
                "doc_count" : 121
        }, {
            "key" : "9",
                "doc_count" : 104
        } ]
    }
}
}

我想要做的是告诉ElasticSearch只保留桶= key = [1,2,3,4,5]。

更新

以下是我使用的查询：

POST xxtransaction/_search?ignore_unavailable=true
{
  "size" : 0,
  "timeout" : 30000,
  "terminate_after" : 10000000,
  "query" : {
    "filtered" : {
      "filter" : {
        "and" : {
          "filters" : [ {
            "range" : {
              "transaction_time" : {
                "from" : 1459461600000,
                "to" : 1459547999999,
                "include_lower" : true,
                "include_upper" : true
              }
            }
          }, {
            "term" : {
              "site" : "xxx.com"
            }
          }, {
            "terms" : {
              "category_codes" : [ 1,2,3,4,5,6,7,8,9]
            }
          } ]
        }
      }
    }
  },
  "aggregations" : {
    "category_codes" : {
      "terms" : {
        "field" : "category_codes",
        "size" : 20000
      }
    }
  }
}