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26 lines
1.3 KiB
SQL
26 lines
1.3 KiB
SQL
-- Tags: long
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SET max_bytes_before_external_group_by = 100000000;
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SET max_memory_usage = 410000000;
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SET group_by_two_level_threshold = 100000;
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SET group_by_two_level_threshold_bytes = 50000000;
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SELECT sum(k), sum(c) FROM (SELECT number AS k, count() AS c FROM (SELECT * FROM system.numbers LIMIT 10000000) GROUP BY k);
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SELECT sum(k), sum(c), max(u) FROM (SELECT number AS k, count() AS c, uniqArray(range(number % 16)) AS u FROM (SELECT * FROM system.numbers LIMIT 1000000) GROUP BY k);
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SET max_memory_usage = 0;
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SET group_by_two_level_threshold = 100000;
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SET max_bytes_before_external_group_by = '1Mi';
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-- method: key_string & key_string_two_level
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CREATE TABLE t_00284_str(s String) ENGINE = MergeTree() ORDER BY tuple();
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INSERT INTO t_00284_str SELECT toString(number) FROM numbers_mt(1e6);
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INSERT INTO t_00284_str SELECT toString(number) FROM numbers_mt(1e6);
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SELECT s, count() FROM t_00284_str GROUP BY s ORDER BY s LIMIT 10 OFFSET 42;
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-- method: low_cardinality_key_string & low_cardinality_key_string_two_level
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CREATE TABLE t_00284_lc_str(s LowCardinality(String)) ENGINE = MergeTree() ORDER BY tuple();
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INSERT INTO t_00284_lc_str SELECT toString(number) FROM numbers_mt(1e6);
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INSERT INTO t_00284_lc_str SELECT toString(number) FROM numbers_mt(1e6);
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SELECT s, count() FROM t_00284_lc_str GROUP BY s ORDER BY s LIMIT 10 OFFSET 42;
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