ClickHouse/tests/integration/test_dictionaries_update_and_reload/configs/dictionaries/cache_xypairs.xml

<yandex>
	<dictionary>
		<name>cache_xypairs</name>
		<source>
            <clickhouse>
                <host>localhost</host>
                <port>9000</port>
                <user>default</user>
                <password></password>
                <db>test</db>
                <table>xypairs</table>
            </clickhouse>
		</source>
		<lifetime>1</lifetime>
		<layout>
			<cache>
				<size_in_cells>5</size_in_cells>
			</cache>
		</layout>
		<structure>
            <id>
                <name>x</name>
            </id>
			<attribute>
				<name>y</name>
				<type>UInt64</type>
                <null_value>0</null_value>
			</attribute>
		</structure>
	</dictionary>
</yandex>