OpenSearch/docs/reference/ingest/processors/lowercase.asciidoc

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[[lowercase-processor]]
=== Lowercase Processor
Converts a string to its lowercase equivalent. If the field is an array of strings, all members of the array will be converted.
[[lowercase-options]]
.Lowercase Options
[options="header"]
|======
| Name | Required | Default | Description
| `field` | yes | - | The field to make lowercase
| `target_field` | no | `field` | The field to assign the converted value to, by default `field` is updated in-place
| `ignore_missing` | no | `false` | If `true` and `field` does not exist or is `null`, the processor quietly exits without modifying the document
include::common-options.asciidoc[]
|======
[source,js]
--------------------------------------------------
{
"lowercase": {
"field": "foo"
}
}
--------------------------------------------------
// NOTCONSOLE