> For the complete documentation index, see [llms.txt](https://mariadb.com/docs/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://mariadb.com/docs/server/reference/sql-statements/data-definition/alter/alter-logfile-group.md).

# ALTER LOGFILE GROUP

{% hint style="info" %}
The `ALTER LOGFILE GROUP` statement is not supported by MariaDB. It was originally inherited from MySQL NDB Cluster. See [MDEV-19295](https://jira.mariadb.org/browse/MDEV-19295) for more information.
{% endhint %}

## Syntax

```bnf
ALTER LOGFILE GROUP logfile_group
    ADD UNDOFILE 'file_name'
    [INITIAL_SIZE [=] size]
    [WAIT]
    ENGINE [=] engine_name
```

<sub>*This page is licensed: GPLv2, originally from*</sub> [<sub>*fill\_help\_tables.sql*</sub>](https://github.com/MariaDB/server/blob/main/scripts/fill_help_tables.sql)

{% @marketo/form formId="4316" %}