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elasticsearch/docs/reference/query-languages/esql/_snippets/functions/reverse.md
Colleen McGinnis b7e3a1e14b
[docs] Migrate docs from AsciiDoc to Markdown (#123507) 
* delete asciidoc files

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* Disable docs tests

* Clarify release notes page titles

* Revert "Clarify release notes page titles"

This reverts commit 8be688648d.

* Comment out edternal URI images

* Clean up query languages landing pages, link to conceptual docs

* Add .md to url

* Fixes inference processor nesting.

---------

Co-authored-by: Liam Thompson <32779855+leemthompo@users.noreply.github.com>
Co-authored-by: Liam Thompson <leemthompo@gmail.com>
Co-authored-by: Martijn Laarman <Mpdreamz@gmail.com>
Co-authored-by: István Zoltán Szabó <szabosteve@gmail.com>
2025-02-27 17:56:14 +01:00

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REVERSE [esql-reverse]

Syntax

:::{image} ../../../../../images/reverse.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 in reverse order.

Supported types

str result
keyword keyword
text keyword

Examples

ROW message = "Some Text" | EVAL message_reversed = REVERSE(message);
message:keyword message_reversed:keyword
Some Text txeT emoS

REVERSE works with unicode, too! It keeps unicode grapheme clusters together during reversal.

ROW bending_arts = "💧🪨🔥💨" | EVAL bending_arts_reversed = REVERSE(bending_arts);
bending_arts:keyword bending_arts_reversed:keyword
💧🪨🔥💨 💨🔥🪨💧