ClickHouse/tests/performance/aggregating_merge_tree_simple_aggregate_function_string.xml

<test>
    <settings>
        <allow_suspicious_primary_key>1</allow_suspicious_primary_key>
    </settings>
    <create_query>
        CREATE TABLE bench
        ENGINE = AggregatingMergeTree()
        ORDER BY key
        SETTINGS index_granularity = 8192
        AS
        SELECT CAST(reinterpretAsString(number), 'SimpleAggregateFunction(any, String)') AS key
        FROM numbers_mt(5e6)
        SETTINGS max_insert_threads = 16
    </create_query>

    <fill_query>OPTIMIZE TABLE bench</fill_query>

    <query>
        SELECT *
        FROM bench
        GROUP BY key
        SETTINGS optimize_aggregation_in_order = 1, max_threads = 16
        FORMAT Null
    </query>

    <drop_query>DROP TABLE IF EXISTS bench</drop_query>
</test>