ClickHouse/tests/performance/formats_columns_sampling.xml

<test>
    <settings>
        <max_threads>1</max_threads>
    </settings>

    <substitutions>
        <substitution>
            <name>format</name>
            <values>
                <value>TabSeparatedWithNames</value>
                <value>CustomSeparatedWithNames</value>
                <value>CSVWithNames</value>
                <value>JSONEachRow</value>
                <value>JSONCompactEachRowWithNames</value>
                <value>TSKV</value>
                <value>Avro</value>
                <value>ORC</value>
                <value>Parquet</value>
                <value>Arrow</value>
                <value>Native</value>
            </values>
        </substitution>
    </substitutions>

    <create_query>CREATE TABLE IF NOT EXISTS table_{format} ENGINE = File({format}) AS test.hits</create_query>

    <fill_query>INSERT INTO table_{format} SELECT * FROM test.hits LIMIT 100000</fill_query>

    <query>SELECT WatchID FROM table_{format} FORMAT Null</query>

    <drop_query>DROP TABLE IF EXISTS table_{format}</drop_query>
</test>