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WARNING: Version 6.0 of Elasticsearch has passed its EOL date.

This documentation is no longer being maintained and may be removed. If you are running this version, we strongly advise you to upgrade. For the latest information, see the current release documentation.

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Elastic Docs ›Elasticsearch Reference [6.0] ›Ingest Node ›Processors

Lowercase Processor

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Lowercase Processor

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Converts a string to its lowercase equivalent.

Table 25. Lowercase Options

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

 
{
  "lowercase": {
    "field": "foo"
  }
}
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