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elasticsearch/docs/reference/query-languages/sql/sql-functions-system.md
Craig Taverner a8b2428dd1
9.0 backport docs query languages (#125113) 
* Restructure query-languages docs files for clarity (#124797)

In a few previous PR's we restructured the ES|QL docs to make it possible to generate them dynamically.

This PR just moves a few files around to make the query languages docs easier to work with, and a little more organized like the ES|QL docs.

A bit part of this was setting up redirects to the new locations, so other repo's could correctly link to the elasticsearch docs.

* After running tests, we revert a few features

* Fix build.gradle and improved some generating code

* After running tests

* Update x-pack/plugin/esql/build.gradle
2025-03-19 04:24:11 +11:00

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https://www.elastic.co/guide/en/elasticsearch/reference/current/sql-functions-system.html

System Functions [sql-functions-system]

These functions return metadata type of information about the system being queried.

DATABASE [sql-functions-system-database]

DATABASE()

Input: none

Output: string

Description: Returns the name of the database being queried. In the case of Elasticsearch SQL, this is the name of the Elasticsearch cluster. This function should always return a non-null value.

SELECT DATABASE();

   DATABASE
---------------
elasticsearch

USER [sql-functions-system-user]

USER()

Input: none

Output: string

Description: Returns the username of the authenticated user executing the query. This function can return null in case security is disabled.

SELECT USER();

     USER
---------------
elastic