ClickHouse/tests/performance/string_join.xml

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<test>
<preconditions>
<table_exists>default.hits_10m_single</table_exists>
</preconditions>
<create_query>CREATE TABLE hits_10m_words (word String, UserID UInt64) ENGINE Memory</create_query>
<create_query>CREATE TABLE strings (short String, long String) ENGINE Memory</create_query>
<fill_query> INSERT INTO hits_10m_words SELECT DISTINCT arrayJoin(splitByString(' ', SearchPhrase)) AS word, UserID FROM hits_10m_single WHERE length(word) > 0</fill_query>
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<fill_query> INSERT INTO strings SELECT toString(rand()) a, a || a || a || a || a || a || a || a || a || a || a || a FROM zeros(1000000)</fill_query>
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<settings>
<max_threads>1</max_threads>
</settings>
<query>SELECT 1 FROM hits_10m_words AS l ANY LEFT JOIN hits_10m_words AS r USING (word) FORMAT Null</query>
<query>SELECT 1 FROM strings AS l ANY LEFT JOIN strings AS r USING (short) FORMAT Null</query>
<query>SELECT 1 FROM strings AS l ANY LEFT JOIN strings AS r USING (long) FORMAT Null</query>
<drop_query>DROP TABLE IF EXISTS hits_10m_words</drop_query>
<drop_query>DROP TABLE IF EXISTS strings</drop_query>
</test>