ClickHouse/tests/integration/test_storage_postgresql/configs/named_collections.xml

<clickhouse>
    <named_collections>
        <postgres1>
            <user>postgres</user>
            <password>mysecretpassword</password>
            <host>postgres1</host>
            <port>5432</port>
            <database>postgres</database>
            <table>test_table</table>
        </postgres1>
        <postgres2>
            <user>postgres</user>
            <password>mysecretpassword</password>
            <host>postgres1</host>
        </postgres2>
        <postgres3>
            <user>postgres</user>
            <password>mysecretpassword</password>
            <host>postgres1</host>
            <port>1111</port>
            <database>postgres</database>
            <table>test_table</table>
        </postgres3>
        <postgres4>
            <user>postgres</user>
            <password>mysecretpassword</password>
            <host>postgres1</host>
            <port>5432</port>
            <database>postgres</database>
            <table>test_replicas</table>
        </postgres4>
    </named_collections>
</clickhouse>