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113 lines
3.1 KiB
Markdown
113 lines
3.1 KiB
Markdown
---
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navigation_title: "Cumulative sum"
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mapped_pages:
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- https://www.elastic.co/guide/en/elasticsearch/reference/current/search-aggregations-pipeline-cumulative-sum-aggregation.html
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---
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# Cumulative sum aggregation [search-aggregations-pipeline-cumulative-sum-aggregation]
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A parent pipeline aggregation which calculates the cumulative sum of a specified metric in a parent histogram (or date_histogram) aggregation. The specified metric must be numeric and the enclosing histogram must have `min_doc_count` set to `0` (default for `histogram` aggregations).
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## Syntax [_syntax_13]
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A `cumulative_sum` aggregation looks like this in isolation:
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```js
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{
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"cumulative_sum": {
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"buckets_path": "the_sum"
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}
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}
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```
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$$$cumulative-sum-params$$$
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| Parameter Name | Description | Required | Default Value |
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| --- | --- | --- | --- |
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| `buckets_path` | The path to the buckets we wish to find the cumulative sum for (see [`buckets_path` Syntax](/reference/data-analysis/aggregations/pipeline.md#buckets-path-syntax) for more details) | Required | |
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| `format` | [DecimalFormat pattern](https://docs.oracle.com/en/java/javase/11/docs/api/java.base/java/text/DecimalFormat.html) for theoutput value. If specified, the formatted value is returned in the aggregation’s`value_as_string` property | Optional | `null` |
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The following snippet calculates the cumulative sum of the total monthly `sales`:
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```console
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POST /sales/_search
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{
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"size": 0,
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"aggs": {
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"sales_per_month": {
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"date_histogram": {
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"field": "date",
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"calendar_interval": "month"
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},
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"aggs": {
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"sales": {
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"sum": {
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"field": "price"
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}
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},
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"cumulative_sales": {
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"cumulative_sum": {
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"buckets_path": "sales" <1>
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}
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}
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}
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}
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}
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}
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```
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1. `buckets_path` instructs this cumulative sum aggregation to use the output of the `sales` aggregation for the cumulative sum
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And the following may be the response:
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```console-result
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{
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"took": 11,
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"timed_out": false,
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"_shards": ...,
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"hits": ...,
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"aggregations": {
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"sales_per_month": {
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"buckets": [
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{
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"key_as_string": "2015/01/01 00:00:00",
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"key": 1420070400000,
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"doc_count": 3,
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"sales": {
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"value": 550.0
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},
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"cumulative_sales": {
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"value": 550.0
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}
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},
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{
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"key_as_string": "2015/02/01 00:00:00",
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"key": 1422748800000,
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"doc_count": 2,
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"sales": {
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"value": 60.0
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},
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"cumulative_sales": {
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"value": 610.0
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}
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},
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{
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"key_as_string": "2015/03/01 00:00:00",
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"key": 1425168000000,
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"doc_count": 2,
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"sales": {
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"value": 375.0
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},
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"cumulative_sales": {
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"value": 985.0
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}
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}
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]
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}
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}
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}
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```
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