ES|QL MV_DEDUPE function
Elastic Cloud Serverless projects are autoscaled environments, fully managed by Elastic and available on Elastic Cloud. Availability This functionality is generally available and ready for production usage. Serverless interfaces and procedures might differ from classic Elastic Stack deployments. The Elastic Stack includes Elastic's core products such as Elasticsearch, Kibana, Logstash, and Beats. Availability This functionality is generally available and ready for production usage. 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.
Serverless
Generally available
Stack
Generally available
Removes duplicate values from a multi-value field.
field-
Expression that can be null, a single value, or multiple values.
Remove duplicate values from a multivalued field.
MV_DEDUPE may, but won’t always, sort the values in the column.
| field | result |
|---|---|
| boolean | boolean |
| cartesian_point | cartesian_point |
| cartesian_shape | cartesian_shape |
| date | date |
| date_nanos | date_nanos |
| double | double |
| flattened The Elastic Stack includes Elastic's core products such as Elasticsearch, Kibana, Logstash, and Beats. Availability Preview since 9.5 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. | flattened |
| geo_point | geo_point |
| geo_shape | geo_shape |
| geohash | geohash |
| geohex | geohex |
| geotile | geotile |
| integer | integer |
| ip | ip |
| keyword | keyword |
| long | long |
| text | keyword |
| unsigned_long | unsigned_long |
| version | version |
ROW a=["foo", "foo", "bar", "foo"]
| EVAL dedupe_a = MV_DEDUPE(a)
| a:keyword | dedupe_a:keyword |
|---|---|
| ["foo", "foo", "bar", "foo"] | ["foo", "bar"] |