您只需添加一个忽略具有该值的文档的查询部件：

{
  "query": {
    "range": {
      "PriceSavings": {
        "gt": -99999999999999
      }
    }
  },
  "aggs": {
    "group_by_PriceSavings": {
      "sum": {
        "field": "PriceSavings"
      }
    }
  }
}