elasticsearch/docs/reference/query-languages/esql/_snippets/functions/to_upper.md

TO_UPPER [esql-to_upper]

Syntax

:::{image} ../../../../../images/to_upper.svg :alt: Embedded :class: text-center :::

Parameters

str : String expression. If null, the function returns null.

Description

Returns a new string representing the input string converted to upper case.

Supported types

str	result
keyword	keyword
text	keyword

Example

ROW message = "Some Text"
| EVAL message_upper = TO_UPPER(message)

message:keyword	message_upper:keyword
Some Text	SOME TEXT