elasticsearch中如何获取每个索引中数据的最小和最大日期？

Question

How can we get the minimum and maximum dates of data in each indices in elastic search?

I was going through the documentation but not able to understand which API will help get the min and max dates of data in each indices in elastic search.

Answer 1

Tldr;

I believe you could address that using the aggregation feature of Elasticsearch. You could use the Min and Max metric aggregation.

Solution

This would look like that using the api:

GET <The Index>/_search
{
  "size": 0, 
  "query": {
    "match_all": {}
  },
  "aggs": {
    "min": {
      "min": {
        "field": "<The date>"
      }
    },
    "max":{
      "max": {
        "field": "<The date>"
      }
    }
  }
}

The result should look like so:

{
  "took": 0,
  "timed_out": false,
  "_shards": {
...
  },
  "hits": {
    "total": {
      "value": 10000,
      "relation": "gte"
    },
    "max_score": null,
    "hits": []
  },
  "aggregations": {
    "min": {
      "value": 1660521603764,
      "value_as_string": "2022-08-15T00:00:03.764Z"
    },
    "max": {
      "value": 1665431791459,
      "value_as_string": "2022-10-10T19:56:31.459Z"
    }
  }
}