ClickHouse/tests/performance/insert_select_squashing.xml

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<test>
<settings>
<max_block_size>1000</max_block_size>
</settings>
<create_query>
CREATE TABLE squash_performance
(
s1 String,
s2 Nullable(String),
a1 Array(Array(String)),
a2 Array(Array(UInt32)),
m1 Map(String, Array(String)),
m2 Map(String, Array(UInt64)),
t Tuple(String, Array(String), Map(String, String))
)
ENGINE = Null;
</create_query>
<query>INSERT INTO squash_performance SELECT * FROM generateRandom(42) LIMIT 500000</query>
<drop_query>DROP TABLE IF EXISTS squash_performance</drop_query>
</test>