Scripts
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
A script in Painless is a complete program composed of one or more statements that performs a specific task within Elasticsearch. Scripts run within a controlled sandbox environment that determines which variables are available and which APIs can be accessed based on the use context.
Scripts are the fundamental runnable unit in Painless, allowing you to customize Elasticsearch behavior for search scoring, data transformation, field calculations, and operational tasks. Each script runs in isolation with access to context-specific variables and a curated set of safe operations.
For detailed guidance on writing scripts, practical examples, and step-by-step tutorials, refer to How to write Painless scripts.