Aggregation on latest n records

Elastic Stack Elasticsearch
1

Hi

Is there any way to do aggregation on latest N records?

this solution didn't work

{
   "query": {...},
   "size": N,
   "order": ...,
   "aggs": {
       ....
   }
}

for more detail: I want to get last 10 records from my records where "service_name" field is "x" and then aggregate on these 10 records to find out how many of these records have "success" in "resp_code" field.

my data is something like this:

[
  {
    "_index": "logs",
    "_type": "_doc",
    "_id": "1232525",
    "_score": 1,
    "_source": {
      "resp_body": "",
      "client_ip": "127.0.0.1",
      "resp_time": "2021-04-15T10:24:51+01:00",
      "@timestamp": "2021-04-15T05:55:00.452Z",
      "resp_code": "412",
      "service_name": "service1",
      "log_id": "1232525"
    }
  },
  {
    "_index": "logs",
    "_type": "_doc",
    "_id": "1232524",
    "_score": 1,
    "_source": {
      "resp_body": "",
      "client_ip": "127.0.0.1",
      "resp_time": "2021-04-15T10:23:51+01:00",
      "@timestamp": "2021-04-15T05:53:00.452Z",
      "resp_code": "0",
      "service_name": "service2",
      "log_id": "1232524"
    }
  },
  {
    "_index": "logs",
    "_type": "_doc",
    "_id": "1232523",
    "_score": 1,
    "_source": {
      "resp_body": "",
      "client_ip": "127.0.0.1",
      "resp_time": "2021-04-15T10:22:51+01:00",
      "@timestamp": "2021-04-15T05:52:00.452Z",
      "resp_code": "0",
      "service_name": "service1",
      "log_id": "1232523"
    }
  },
  {
    "_index": "logs",
    "_type": "_doc",
    "_id": "1232522",
    "_score": 1,
    "_source": {
      "resp_body": "",
      "client_ip": "127.0.0.1",
      "resp_time": "2021-04-15T10:21:51+01:00",
      "@timestamp": "2021-04-15T05:51:00.452Z",
      "resp_code": "0",
      "service_name": "service1",
      "log_id": "1232522"
    }
  },
  {
    "_index": "logs",
    "_type": "_doc",
    "_id": "1232521",
    "_score": 1,
    "_source": {
      "resp_body": "",
      "client_ip": "127.0.0.1",
      "resp_time": "2021-04-15T10:20:51+01:00",
      "@timestamp": "2021-04-15T05:50:00.452Z",
      "resp_code": "0",
      "service_name": "service2",
      "log_id": "1232521"
    }
  }
]

for example: I want to get last 2 records with "service_name=service1" and find how many records of those have "resp_code=0"

2

Welcome!

I'm not sure you can do that. That being said, it should be easy to compute this on the client side as you just have to iterate over the hits.

1 Like
3

Hi David!

Thanks

4

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