ClickHouse/tests/performance/rand.xml

<test>
    <substitutions>
        <substitution>
           <name>table</name>
           <values>
               <value>zeros(1000000000)</value>
           </values>
        </substitution>
    </substitutions>

    <query>SELECT count() FROM (SELECT rand() FROM {table}) </query>
    <query>SELECT count() FROM (SELECT rand64() FROM {table}) </query>
    <query>SELECT count() FROM (SELECT generateUUIDv4() FROM {table}) </query>
</test>