ClickHouse/tests/performance/polymorphic_parts_l.xml

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<test>
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<create_query>
CREATE TABLE hits_wide AS hits_10m_single ENGINE = MergeTree()
PARTITION BY toYYYYMM(EventDate)
ORDER BY (CounterID, EventDate, intHash32(UserID))
SAMPLE BY intHash32(UserID)
SETTINGS min_rows_for_wide_part = 0, min_bytes_for_wide_part = 0
</create_query>
<create_query>
CREATE TABLE hits_compact AS hits_10m_single ENGINE = MergeTree()
PARTITION BY toYYYYMM(EventDate)
ORDER BY (CounterID, EventDate, intHash32(UserID))
SAMPLE BY intHash32(UserID)
SETTINGS min_bytes_for_wide_part = '10M'
</create_query>
<create_query>
CREATE TABLE hits_buffer AS hits_10m_single
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ENGINE = Buffer(default, hits_wide, 1, 0, 0, 10000, 10000, 0, 0)
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</create_query>
<!-- Emulate writing many parts with 1000 rows, because single insert query is too fast -->
<settings>
<max_block_size>1000</max_block_size>
<min_insert_block_size_rows>1000</min_insert_block_size_rows>
</settings>
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<!-- 100 parts -->
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<query>INSERT INTO hits_wide(UserID) SELECT rand() FROM numbers(100000)</query>
<query>INSERT INTO hits_compact(UserID) SELECT rand() FROM numbers(100000)</query>
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<query>INSERT INTO hits_buffer(UserID) SELECT rand() FROM numbers(100000)</query>
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<drop_query>DROP TABLE IF EXISTS hits_wide</drop_query>
<drop_query>DROP TABLE IF EXISTS hits_compact</drop_query>
<drop_query>DROP TABLE IF EXISTS hits_buffer</drop_query>
</test>