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Doc change explanation that max_result_rows result_overflow_mode=break depends of max_block_size #9346

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Doc change explanation that max_result_rows result_overflow_mode=break depends of max_block_size #9346

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Update query_complexity.md
den-crane Feb 24, 2020
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Update query_complexity.md
den-crane Feb 24, 2020
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19 changes: 18 additions & 1 deletion docs/ru/operations/settings/query_complexity.md
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Expand Up @@ -108,7 +108,24 @@
## result_overflow_mode

Что делать, если объём результата превысил одно из ограничений: throw или break. По умолчанию: throw.
Использование break по смыслу похоже на LIMIT.

Использование break по смыслу похоже на LIMIT. Break прерывает выполнение только на уровне блока. Т.е. число строк которые вернет запрос будет больше чем ограничение [max_result_rows](#max_result_rows), кратно [max_block_size](settings.md#max_block_size) и зависит от [max_threads](settings.md#settings-max_threads).

Пример:
```sql
SET max_threads = 3, max_block_size = 3333;
SET max_result_rows = 3334, result_overflow_mode = 'break';

SELECT *
FROM numbers_mt(100000)
FORMAT Null;
```

Результат:

```text
6666 rows in set. ...
```

## max_execution_time

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