如何定义Elasticsearch查询中具有特定字段的结果项的百分比？

GET /your_index/_search
{
  "size": 0,
  "query": {
    "match_all": {}
  },
  "aggs": {
    "result_percentage": {
      "filter": {
        "exists": {
          "field": "your_field"
        }
      },
      "aggs": {
        "total_docs": {
          "value_count": {
            "field": "_index"
          }
        },
        "result_docs": {
          "bucket_script": {
            "buckets_path": {
              "resultCount": "_count",
              "totalDocs": "total_docs.value"
            },
            "script": "params.resultCount / params.totalDocs * 100"
          }
        }
      }
    }
  }
}