OpenSearch/docs/painless/painless-contexts/painless-bucket-agg-context...

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[[painless-bucket-agg-context]]
=== Bucket aggregation context
Use a Painless script in an
{es_version}/search-aggregations-pipeline-bucket-script-aggregation.html[bucket aggregation]
to calculate a value as a result in a bucket.
*Variables*
`params` (`Map`, read-only)::
User-defined parameters passed in as part of the query. The parameters
include values defined as part of the `buckets_path`.
*Return*
numeric::
The calculated value as the result.
*API*
The standard <<painless-api-reference, Painless API>> is available.