% This is generated by ESQL's AbstractFunctionTestCase. Do not edit it. See ../README.md for how to regenerate it.

## Description

Groups text messages into categories of similarly formatted text values.

`CATEGORIZE` has the following limitations:

* can’t be used within other expressions
* can’t be used more than once in the groupings
* can’t be used or referenced within aggregate functions and it has to be the first grouping

