28 lines
901 B
Plaintext
28 lines
901 B
Plaintext
|
[[painless-metric-agg-combine-context]]
|
||
|
|
=== Metric aggregation combine context
|
||
|
|
|
||
|
|
Use a Painless script to
|
||
|
|
{es_version}/search-aggregations-metrics-scripted-metric-aggregation.html[combine]
|
||
|
|
values for use in a scripted metric aggregation. A combine script is run once
|
||
|
|
per shard following a <<painless-metric-agg-map-context, map script>> and is
|
||
|
|
optional as part of a full metric aggregation.
|
||
|
|
|
||
|
|
*Variables*
|
||
|
|
|
||
|
|
`params` (`Map`, read-only)::
|
||
|
|
User-defined parameters passed in as part of the query.
|
||
|
|
|
||
|
|
`params['_agg']` (`Map`)::
|
||
|
|
`Map` with values available from the prior map script.
|
||
|
|
|
||
|
|
*Return*
|
||
|
|
|
||
|
|
`List`, `Map`, `String`, or primitive::
|
||
|
|
A value collected for use in a
|
||
|
|
<<painless-metric-agg-reduce-context, reduce script>>. If no reduce
|
||
|
|
script is specified, the value is used as part of the result.
|
||
|
|
|
||
|
|
*API*
|
||
|
|
|
||
|
|
The standard <<painless-api-reference, Painless API>> is available.
|