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Extract array

Serverless Preview

Elastic Cloud Serverless projects are autoscaled environments, fully managed by Elastic and available on Elastic Cloud.

Availability

  • Preview

    This functionality is in technical preview and is ready for evaluation. Use with caution in production; it is not recommended for mission-critical workloads. Elastic will work to fix any issues, but features in technical preview are not subject to the support SLA of official GA features. Specific Support terms apply.

Serverless interfaces and procedures might differ from classic Elastic Stack deployments.

Stack Preview

The Elastic Stack includes Elastic's core products such as Elasticsearch, Kibana, Logstash, and Beats.

Availability

  • Preview

    This functionality is in technical preview and is ready for evaluation. Use with caution in production; it is not recommended for mission-critical workloads. Elastic will work to fix any issues, but features in technical preview are not subject to the support SLA of official GA features. Specific Support terms apply.

Unless stated otherwise on the page, this functionality is available when your Elastic Stack is deployed on Elastic Cloud Hosted, Elastic Cloud Enterprise, Elastic Cloud on Kubernetes, and self-managed environments.

This documentation corresponds to the latest patch available for each minor version. If you're not using the latest patch, check the release notes for changes.

Warning

This functionality is in technical preview and may be changed or removed in a future release. Elastic will work to fix any issues, but features in technical preview are not subject to the support SLA of official GA features.

The extract_array processor populates fields with values read from an array field. The following example will populate source.ip with the first element of the my_array field, destination.ip with the second element, and network.transport with the third.

YAML 
processors:
  - extract_array:
      field: my_array
      mappings:
        source.ip: 0
        destination.ip: 1
        network.transport: 2

The following settings are supported:

field
The array field whose elements are to be extracted.
mappings
Maps each field name to an array index. Use 0 for the first element in the array. Multiple fields can be mapped to the same array element.
ignore_missing
(Optional) Whether to ignore events where the array field is missing. The default is false, which will fail processing of an event if the specified field does not exist. Set it to true to ignore this condition.
overwrite_keys
Whether the target fields specified in the mapping are overwritten if they already exist. The default is false, which will fail processing if a target field already exists.
fail_on_error
(Optional) If set to true and an error happens, changes to the event are reverted, and the original event is returned. If set to false, processing continues despite errors. Default is true.
omit_empty

(Optional) Whether empty values are extracted from the array. If set to true, instead of the target field being set to an empty value, it is left unset. The empty string (""), an empty array ([]) or an empty object ({}) are considered empty values. Default is false.