Scripting
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
With scripting, you can evaluate custom expressions in Elasticsearch. For example, you can use a script to return a computed value as a field or evaluate a custom score for a query.
The default scripting language is Painless. Additional lang plugins are available to run scripts written in other languages. You can specify the language of the script anywhere that scripts run.
Painless is purpose-built for Elasticsearch, can be used for any purpose in the scripting APIs, and provides the most flexibility. The other languages are less flexible, but can be useful for specific purposes.
| Language | Sandboxed | Required plugin | Purpose |
|---|---|---|---|
painless |
 |
Built-in | Purpose-built for Elasticsearch |
expression |
|
Built-in | Fast custom ranking and sorting |
mustache |
|
Built-in | Templates |
java |
 |
Not available | Expert API |