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

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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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