Scriptingedit

With scripting, you can evaluate custom expressions in Elasticsearch. For example, you could use a script to return "script fields" as part of a search request or evaluate a custom score for a query.

The default scripting language is Painless. Additional lang plugins enable you to run scripts written in other languages. Everywhere a script can be used, you can include a lang parameter to specify the language of the script.

General-purpose languagesedit

These languages can be used for any purpose in the scripting APIs, and give the most flexibility.

LanguageSandboxedRequired plugin

painless

yes

built-in

Special-purpose languagesedit

These languages are less flexible, but typically have higher performance for certain tasks.

LanguageSandboxedRequired pluginPurpose

expression

yes

built-in

fast custom ranking and sorting

mustache

yes

built-in

templates

java

n/a

you write it!

expert API

Warning

Scripts and security

Languages that are sandboxed are designed with security in mind. However, non- sandboxed languages can be a security issue, please read Scripting and security for more details.