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21 lines
595 B
SQL
21 lines
595 B
SQL
SELECT uniqCombined(number)
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FROM numbers(10000)
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GROUP BY number
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WITH TOTALS
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ORDER BY number DESC
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LIMIT 10
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SETTINGS
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/* force aggregates serialization to trigger the issue with */
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max_bytes_before_external_group_by=1,
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/* overflow row: */
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max_rows_to_group_by=10000000000,
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group_by_overflow_mode='any',
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totals_mode='before_having',
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/* this is to account memory under 4MB (for max_bytes_before_external_group_by) to use less rows */
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max_untracked_memory=0,
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group_by_two_level_threshold=10000,
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/* explicitly */
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max_block_size=1000,
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max_threads=1
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;
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