Sum bucket aggregation [search-aggregations-pipeline-sum-bucket-aggregation]

A sibling pipeline aggregation which calculates the sum across all buckets of a specified metric in a sibling aggregation. The specified metric must be numeric and the sibling aggregation must be a multi-bucket aggregation.

Syntax [_syntax_24]

A sum_bucket aggregation looks like this in isolation:

{
  "sum_bucket": {
    "buckets_path": "the_sum"
  }
}

% NOTCONSOLE

$$$sum-bucket-params$$$

Parameter Name	Description	Required	Default Value
`buckets_path`	The path to the buckets we wish to find the sum for (see `buckets_path` Syntax for more details)	Required
`gap_policy`	The policy to apply when gaps are found in the data (see Dealing with gaps in the data for more details)	Optional	`skip`
`format`	DecimalFormat pattern for theoutput value. If specified, the formatted value is returned in the aggregation’s`value_as_string` property.	Optional	`null`

The following snippet calculates the sum of all the total monthly sales buckets:

console

POST /sales/_search
{
  "size": 0,
  "aggs": {
    "sales_per_month": {
      "date_histogram": {
        "field": "date",
        "calendar_interval": "month"
      },
      "aggs": {
        "sales": {
          "sum": {
            "field": "price"
          }
        }
      }
    },
    "sum_monthly_sales": {
      "sum_bucket": {
        "buckets_path": "sales_per_month>sales" <1>
      }
    }
  }
}

% TEST[setup:sales]

buckets_path instructs this sum_bucket aggregation that we want the sum of the sales aggregation in the sales_per_month date histogram.

And the following may be the response:

console-result

{
   "took": 11,
   "timed_out": false,
   "_shards": ...,
   "hits": ...,
   "aggregations": {
      "sales_per_month": {
         "buckets": [
            {
               "key_as_string": "2015/01/01 00:00:00",
               "key": 1420070400000,
               "doc_count": 3,
               "sales": {
                  "value": 550.0
               }
            },
            {
               "key_as_string": "2015/02/01 00:00:00",
               "key": 1422748800000,
               "doc_count": 2,
               "sales": {
                  "value": 60.0
               }
            },
            {
               "key_as_string": "2015/03/01 00:00:00",
               "key": 1425168000000,
               "doc_count": 2,
               "sales": {
                  "value": 375.0
               }
            }
         ]
      },
      "sum_monthly_sales": {
          "value": 985.0
      }
   }
}

% TESTRESPONSE[s/"took": 11/"took": $body.took/] % TESTRESPONSE[s/"_shards": .../"_shards": $body._shards/] % TESTRESPONSE[s/"hits": .../"hits": $body.hits/]