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Filter aggregations

A filter aggregation is a query clause, exactly like a search query — match or term or range. You can use the filter aggregation to narrow down the entire set of documents to a specific set before creating buckets.

The following example shows the avg aggregation running within the context of a filter. The avg aggregation only aggregates the documents that match the range query:

GET opensearch_dashboards_sample_data_ecommerce/_search
{
  "size": 0,
  "aggs": {
    "low_value": {
      "filter": {
        "range": {
          "taxful_total_price": {
            "lte": 50
          }
        }
      },
      "aggs": {
        "avg_amount": {
          "avg": {
            "field": "taxful_total_price"
          }
        }
      }
    }
  }
}

Example response

...
"aggregations" : {
  "low_value" : {
    "doc_count" : 1633,
    "avg_amount" : {
      "value" : 38.363175998928355
    }
  }
 }
}
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