mirror of
https://github.com/ClickHouse/ClickHouse.git
synced 2024-09-20 08:40:50 +00:00
23 lines
735 B
SQL
23 lines
735 B
SQL
DROP TABLE IF EXISTS test.hits_dst;
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DROP TABLE IF EXISTS test.hits_buffer;
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CREATE TABLE test.hits_dst AS test.hits
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ENGINE = MergeTree
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PARTITION BY toYYYYMM(EventDate)
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ORDER BY (CounterID, EventDate, intHash32(UserID))
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SAMPLE BY intHash32(UserID)
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SETTINGS storage_policy = 'default';
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CREATE TABLE test.hits_buffer AS test.hits_dst ENGINE = Buffer(test, hits_dst, 8, 600, 600, 1000000, 1000000, 100000000, 1000000000);
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INSERT INTO test.hits_buffer SELECT * FROM test.hits WHERE CounterID = 800784;
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SELECT count() FROM test.hits_buffer;
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SELECT count() FROM test.hits_dst;
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OPTIMIZE TABLE test.hits_buffer;
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SELECT count() FROM test.hits_buffer;
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SELECT count() FROM test.hits_dst;
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DROP TABLE test.hits_dst;
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DROP TABLE test.hits_buffer;
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