ClickHouse/tests/performance/hierarchical_dictionaries.xml

<test>
    <substitutions>
        <substitution>
            <name>dictionary_layout</name>
            <values>
                <value>flat</value>
                <value>hashed</value>
                <value>hashed_array</value>
            </values>
        </substitution>

        <substitution>
            <name>func</name>
            <values>
                <value>dictGetHierarchy</value>
                <value>dictGetDescendants</value>
            </values>
        </substitution>
    </substitutions>

    <create_query>
        CREATE TABLE hierarchical_dictionary_source_table
        (
            id UInt64,
            parent_id UInt64
        ) ENGINE = Memory;
    </create_query>

    <create_query>
        CREATE DICTIONARY hierarchical_{dictionary_layout}_dictionary
        (
            id UInt64,
            parent_id UInt64 HIERARCHICAL
        )
        PRIMARY KEY id
        SOURCE(CLICKHOUSE(DB 'default' TABLE 'hierarchical_dictionary_source_table'))
        LAYOUT({dictionary_layout}())
        LIFETIME(0);
    </create_query>

    <fill_query>
        INSERT INTO hierarchical_dictionary_source_table
        SELECT number, rand64() % 250000
        FROM system.numbers
        LIMIT 500000;
    </fill_query>

    <query>
        SELECT {func}('hierarchical_{dictionary_layout}_dictionary', id) FROM hierarchical_{dictionary_layout}_dictionary FORMAT Null;
    </query>

    <drop_query>DROP TABLE IF EXISTS hierarchical_dictionary_source_table;</drop_query>
    <drop_query>DROP DICTIONARY IF EXISTS hierarchical_{dictionary_layout}_dictionary;</drop_query>

</test>