- Painless Scripting Language: other versions:
- Painless Guide
- Painless Language Specification
- Painless contexts
- Context examples
- Ingest processor context
- Update context
- Update by query context
- Reindex context
- Sort context
- Similarity context
- Weight context
- Score context
- Field context
- Filter context
- Minimum should match context
- Metric aggregation initialization context
- Metric aggregation map context
- Metric aggregation combine context
- Metric aggregation reduce context
- Bucket script aggregation context
- Bucket selector aggregation context
- Analysis Predicate Context
- Watcher condition context
- Watcher transform context
- Painless API Reference
IMPORTANT: No additional bug fixes or documentation updates
will be released for this version. For the latest information, see the
current release documentation.
Metric aggregation reduce context
editMetric aggregation reduce context
editUse a Painless script to reduce values to produce the result of a scripted metric aggregation. A reduce script is run once on the coordinating node following a combine script (or a map script if no combine script is specified) 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.
-
states
(Map
) -
Map
with values available from the prior combine script (or a map script if no combine script is specified).
Return
-
List
,Map
,String
, or primitive - A value used as the result.
API
The standard Painless API is available.
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