Bucket Script pipeline aggregation is not working with filter aggregation

Elastic Stack Elasticsearch
1

Fails with
class org.elasticsearch.search.aggregations.bucket.filter.InternalFilter cannot be cast to class org.elasticsearch.search.aggregations.InternalMultiBucketAggregation

Should it be that restrictive? For instance it works with Filters aggregation

Even though it is a single bucket it is still very useful to be able to perform calculation within it. Particularly if I do it in a multilevel aggregation which starts from filter agg and then may have couple of levels of say range aggs and I want consistent pipeline aggs on every level

2

Could you please show what the actual query is you are trying to run? The error alone isn't sufficient to understand what is occurring.

3 
POST test3/_doc/
{
    "type" : 1,
    "discounted" : 1,
    "sold" : 1
}
POST test3/_doc/
{
    "type" : 1,
    "discounted" : 1,
    "sold" : 0
}
POST test3/_doc/
{
    "type" : 1,
    "discounted" : 0,
    "sold" : 0
}



POST test3/_search
{
  "size": 0,
  "aggs": {
    "type1": {
      "filter": {
        "term": {
          "type": 1
        }
      },
      "aggs": {
        "discounted": {
          "sum": {
            "field": "discounted"
          }
        },
        "sold": {
          "sum": {
            "field": "sold"
          }
        },
        "discounted_sold": {
          "bucket_script": {
            "buckets_path": {
              "discounted": "discounted",
              "sold": "sold"
            },
            "script": "params.sold  / params.discounted"
          }
        }
      }
    }
  }
}

{
  "error": {
    "root_cause": [],
    "type": "search_phase_execution_exception",
    "reason": "",
    "phase": "fetch",
    "grouped": true,
    "failed_shards": [],
    "caused_by": {
      "type": "class_cast_exception",
      "reason": "class org.elasticsearch.search.aggregations.bucket.filter.InternalFilter cannot be cast to class org.elasticsearch.search.aggregations.InternalMultiBucketAggregation (org.elasticsearch.search.aggregations.bucket.filter.InternalFilter and org.elasticsearch.search.aggregations.InternalMultiBucketAggregation are in unnamed module of loader 'app')"
    }
  },
  "status": 500
}
4

@rjernst please see fully working example in my post above

5

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