nextcloud-server/tests/lib/DB/schemDiffData/autoincrement.xml

<?xml version="1.0" encoding="utf-8" ?>
<database>
	<table>
		<name>*dbprefix*external_config</name>
		<declaration>
			<field>
				<name>config_id</name>
				<type>integer</type>
				<default>0</default>
				<notnull>true</notnull>
				<autoincrement>1</autoincrement>
				<length>6</length>
			</field>
		</declaration>
	</table>
</database>