IMPORTANT: No additional bug fixes or documentation updates will be released for this version. For the latest information, see the current release documentation.

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Painless Guide

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Painless Guide

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Painless is a simple, secure scripting language designed specifically for use with Elasticsearch. It is the default scripting language for Elasticsearch and can safely be used for inline and stored scripts. For a jump start into Painless, see A Brief Painless Walkthrough. For a detailed description of the Painless syntax and language features, see the Painless Language Specification.

You can use Painless anywhere scripts are used in Elasticsearch. Painless provides:

Fast performance: Painless scripts run several times faster than the alternatives.
Safety: Fine-grained allowlist with method call/field granularity. See the Painless API Reference for a complete list of available classes and methods.
Optional typing: Variables and parameters can use explicit types or the dynamic def type.
Syntax: Extends a subset of Java’s syntax to provide additional scripting language features.
Optimizations: Designed specifically for Elasticsearch scripting.

A Brief Painless Walkthrough »