ClickHouse/dbms/tests/performance/codecs_int_select.xml

<test>

    <type>loop</type>
    <stop_conditions>
        <all_of>
            <iterations>10</iterations>
            <min_time_not_changing_for_ms>10000</min_time_not_changing_for_ms>
        </all_of>
        <any_of>
            <iterations>100</iterations>
            <total_time_ms>60000</total_time_ms>
        </any_of>
    </stop_conditions>

    <substitutions>
        <substitution>
            <name>codec</name>
            <values>
                <value>NONE</value> <!-- as a baseline -->
                <value>LZ4</value>
                <value>ZSTD</value>
                <value>Delta</value>
                <value>T64</value>
                <value>DoubleDelta</value>
                <value>Gorilla</value>
            </values>
        </substitution>
        <substitution>
            <name>type</name>
            <values>
                <value>UInt64</value>
            </values>
        </substitution>
        <substitution>
            <name>seq_type</name>
            <values>
                <value>seq</value>
                <value>mon</value>
                <value>rnd</value>
            </values>
        </substitution>
    </substitutions>

    <create_query>CREATE TABLE IF NOT EXISTS codec_{seq_type}_{type}_{codec} (n {type} CODEC({codec})) ENGINE = MergeTree PARTITION BY tuple() ORDER BY tuple();</create_query>

    <!-- Using limit to make query finite, allowing it to be run multiple times in a loop, reducing mean error -->
    <fill_query>INSERT INTO codec_seq_UInt64_{codec} (n) SELECT number FROM system.numbers LIMIT 100000 SETTINGS max_threads=1</fill_query>
    <fill_query>INSERT INTO codec_mon_UInt64_{codec} (n) SELECT number*512+(rand()%512) FROM system.numbers LIMIT 100000 SETTINGS max_threads=1</fill_query>
    <fill_query>INSERT INTO codec_rnd_UInt64_{codec} (n) SELECT rand() FROM system.numbers LIMIT 100000 SETTINGS max_threads=1</fill_query>

    <!-- INSERTs above will be run unspecified amount of times, hence size of table is unknown.
    To make test more reliable, we SELECT fixed number of rows. -->
    <query>SELECT count(n) FROM codec_{seq_type}_{type}_{codec} WHERE ignore(n) LIMIT 100000 SETTINGS max_threads=1</query>

    <drop_query>DROP TABLE IF EXISTS codec_{seq_type}_{type}_{codec}</drop_query>

</test>