ClickHouse/tests/performance/simple_join_query.xml

<test>



    <create_query>CREATE TABLE join_table(A Int64, S0 String, S1 String, S2 String, S3 String) ENGINE = MergeTree ORDER BY A</create_query>

    <fill_query>INSERT INTO join_table SELECT number AS A, toString(arrayMap(x->x, range(100))) S0, S0 AS S1, S0 AS S2, S0 AS S3 from numbers_mt(5000000)</fill_query>

    <query tag='UsingJoinWithoutSubquery'>SELECT COUNT() FROM join_table LEFT JOIN join_table USING A</query>
    <query tag='UsingJoinWithSubquery'>SELECT COUNT() FROM join_table LEFT JOIN (SELECT A FROM join_table) AS right USING A</query>
    <query tag='OnExpressionJoinWithoutSubquery'>SELECT COUNT() FROM join_table AS left LEFT JOIN join_table AS right ON left.A = right.A</query>
    <query tag='OnExpressionJoinWithoutSubquery'>SELECT COUNT() FROM join_table AS left LEFT JOIN (SELECT A FROM join_table) AS right ON left.A = right.A</query>

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