Reference Result of Aggregation in Sub-Aggregation

Elastic Stack Elasticsearch
1

How do I refer to "avg_flight_min" in the Range Aggregation, replacing the hard-coded value of 100:

GET kibana_sample_data_flights/_search
{
  "size": 0,
  "aggs": {
    "avg_flight_min": {
      "avg": {
        "field": "FlightTimeMin"
      }
    },
    "price_ranges": {
      "range": {
        "field": "FlightTimeMin",
        "keyed": true, 
        "ranges": [
          {
            "key": "below_avg", 
            "to": 100
          },
          {
            "key": "above_avg", 
            "from": 100
          }
        ]
      }
    }
  }
}

I am using the Sample Flight Data in this example.

2

You would need to run two queries for this. First a search for the avg aggregation, than a search for the for the range.

For some use-cases there are pipelines aggregations, that use the output of aggregations as their input.