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37 lines
1.7 KiB
SQL
37 lines
1.7 KiB
SQL
DROP TABLE IF EXISTS t_uniq_exact;
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CREATE TABLE t_uniq_exact (a UInt64, b String, c UInt64) ENGINE = MergeTree ORDER BY a;
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SET group_by_two_level_threshold_bytes = 1;
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SET group_by_two_level_threshold = 1;
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SET max_threads = 4;
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SET max_bytes_before_external_group_by = 0;
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SET optimize_aggregation_in_order = 0;
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INSERT INTO t_uniq_exact SELECT 0, randomPrintableASCII(5), rand() FROM numbers(300000);
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INSERT INTO t_uniq_exact SELECT 1, randomPrintableASCII(5), rand() FROM numbers(300000);
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INSERT INTO t_uniq_exact SELECT 2, randomPrintableASCII(5), rand() FROM numbers(300000);
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INSERT INTO t_uniq_exact SELECT 3, randomPrintableASCII(5), rand() FROM numbers(300000);
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INSERT INTO t_uniq_exact SELECT 4, randomPrintableASCII(5), rand() FROM numbers(300000);
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INSERT INTO t_uniq_exact SELECT 5, randomPrintableASCII(5), rand() FROM numbers(300000);
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INSERT INTO t_uniq_exact SELECT 6, randomPrintableASCII(5), rand() FROM numbers(300000);
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INSERT INTO t_uniq_exact SELECT 7, randomPrintableASCII(5), rand() FROM numbers(300000);
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INSERT INTO t_uniq_exact SELECT 8, randomPrintableASCII(5), rand() FROM numbers(300000);
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INSERT INTO t_uniq_exact SELECT 9, randomPrintableASCII(5), rand() FROM numbers(300000);
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OPTIMIZE TABLE t_uniq_exact FINAL;
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SELECT a, uniqExact(b) FROM t_uniq_exact GROUP BY a ORDER BY a
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SETTINGS min_hit_rate_to_use_consecutive_keys_optimization = 1.0
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EXCEPT
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SELECT a, uniqExact(b) FROM t_uniq_exact GROUP BY a ORDER BY a
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SETTINGS min_hit_rate_to_use_consecutive_keys_optimization = 0.5;
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SELECT a, sum(c) FROM t_uniq_exact GROUP BY a ORDER BY a
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SETTINGS min_hit_rate_to_use_consecutive_keys_optimization = 1.0
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EXCEPT
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SELECT a, sum(c) FROM t_uniq_exact GROUP BY a ORDER BY a
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SETTINGS min_hit_rate_to_use_consecutive_keys_optimization = 0.5;
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DROP TABLE t_uniq_exact;
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