来自ElasticSearch的汇总输出

Question

我正在使用ElasticSearch存储大约5000万个数据。 数据格式如下。

_id:5e444fc1c5e86c84d1044aeb
meter_id:"jhk"
date:2017-06-17T18:39:28.795+00:00
activePower:Object
unit:"kwh"
Active Power L1:"0"
Active Power L2:"0"
Active Power L3:"0"
Total Active Power:"5"
reactivePower:Object
apparentPower:Object
frequency:Object
thd:Object

现在，我要在两个日期之间获取一部分数据，并根据一个日期对其进行分组，然后将总有功功率字段添加到一个特定的日期组。

预期产量

[
{ date: '04-19', totalActivePower: 5000},
{ date: '05-19', totalActivePower: 6000}
]

Answer 1

您可以使用date_histogram聚合

查询

R_CONSTRAINT_NAME

结果：

{
  "size": 0, 
  "query": {
    "range": {    --> to filter between dates, you can also use filter aggregation
      "date": {
        "gte": "2017-06-16",
        "lte": "2017-06-17"
      }
    }
  },
  "aggs": {
    "perday": {  
      "date_histogram": {   ---> will split documents on per day basis
        "field": "date",
        "interval": "day"
      },
      "aggs": {
        "totalacticepower": { -- sum of field Total Active Power on that day
          "sum": {
            "field": "Total Active Power"
          }
        }
      }
    }
  }
}