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25 lines
574 B
MySQL
25 lines
574 B
MySQL
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SELECT arrayJoin(arrayMap(i -> (i + 1), range(2))) AS index, number
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FROM numbers(2)
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GROUP BY number
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ORDER BY index, number;
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SET max_bytes_before_external_group_by = 1;
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SELECT arrayJoin(arrayMap(i -> (i + 1), range(2))) AS index, number
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FROM numbers(2)
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GROUP BY number
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ORDER BY index, number;
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SET group_by_two_level_threshold = 2;
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SELECT count() FROM
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(
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SELECT
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arrayJoin(arrayMap(i -> (i + 1), range(2))) AS index,
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number
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FROM numbers_mt(100000)
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GROUP BY number
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ORDER BY index ASC
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SETTINGS max_block_size = 100000, max_threads = 2
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);
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