DROP TABLE IF EXISTS numbers_10k_log;

SET max_block_size = 1000;

CREATE TABLE numbers_10k_log ENGINE = Log AS SELECT number FROM system.numbers LIMIT 10000;

SET max_threads = 4;
SET max_rows_to_group_by = 3000, group_by_overflow_mode = 'any';

SELECT ignore(rand() AS k), ignore(max(toString(number))) FROM numbers_10k_log GROUP BY k LIMIT 1;

DROP TABLE numbers_10k_log;