Min Bucket Aggregation
editMin Bucket Aggregation
editA sibling pipeline aggregation which identifies the bucket(s) with the minimum value of a specified metric in a sibling aggregation and outputs both the value and the key(s) of the bucket(s). The specified metric must be numeric and the sibling aggregation must be a multi-bucket aggregation.
Syntax
editA min_bucket
aggregation looks like this in isolation:
{ "min_bucket": { "buckets_path": "the_sum" } }
Table 9. min_bucket
Parameters
Parameter Name | Description | Required | Default Value |
---|---|---|---|
|
The path to the buckets we wish to find the minimum for (see |
Required |
|
|
The policy to apply when gaps are found in the data (see Dealing with gaps in the data for more details) |
Optional |
|
|
format to apply to the output value of this aggregation |
Optional |
|
The following snippet calculates the minimum of the total monthly sales
:
POST /sales/_search { "size": 0, "aggs" : { "sales_per_month" : { "date_histogram" : { "field" : "date", "calendar_interval" : "month" }, "aggs": { "sales": { "sum": { "field": "price" } } } }, "min_monthly_sales": { "min_bucket": { "buckets_path": "sales_per_month>sales" } } } }
|
And the following may be the response:
{ "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 } } ] }, "min_monthly_sales": { "keys": ["2015/02/01 00:00:00"], "value": 60.0 } } }