% This is generated by ESQL's AbstractFunctionTestCase. Do no edit it. See ../README.md for how to regenerate it.

**Example**

This example categorizes server logs messages into categories and aggregates their counts.

```esql
FROM sample_data
| STATS count=COUNT() BY category=CATEGORIZE(message)
```

| count:long | category:keyword |
| --- | --- |
| 3 | .\*?Connected.+?to.\*? |
| 3 | .\*?Connection.+?error.\*? |
| 1 | .\*?Disconnected.\*? |