elasticsearch/docs/reference/ingest/processors/enrich.asciidoc

[role="xpack"]
[testenv="basic"]
[[enrich-processor]]
=== Enrich Processor

The `enrich` processor can enrich documents with data from another index.
See <<ingest-enriching-data,enrich data>> section for more information how to set this up and
check out the <<ingest-enriching-data,tutorial>> to get familiar with enrich policies and related APIs.

[[enrich-options]]
.Enrich Options
[options="header"]
|======
| Name               | Required  | Default              | Description
| `policy_name`      | yes       | -                    | The name of the enrich policy to use.
| `field`            | yes       | -                    | The field in the input document that matches the policies match_field used to retrieve the enrichment data.
| `target_field`     | yes       | -                    | The field that will be used for the enrichment data.
| `ignore_missing`   | no        | false                | If `true` and `field` does not exist, the processor quietly exits without modifying the document
| `override`         | no        | true                 | If processor will update fields with pre-existing non-null-valued field. When set to `false`, such fields will not be touched.
| `max_matches`      | no        | 1                    | The maximum number of matched documents to include under the configured target field. In order to avoid documents getting too large, the maximum allowed value is 128.
include::common-options.asciidoc[]
|======