DROP TABLE IF EXISTS new_table_test; DROP TABLE IF EXISTS check_table_test; CREATE TABLE new_table_test(name String) ENGINE = MergeTree ORDER BY name; INSERT INTO new_table_test VALUES ('test'); CREATE TABLE check_table_test(value1 UInt64, value2 UInt64) ENGINE = MergeTree ORDER BY tuple(); INSERT INTO check_table_test (value1) SELECT value FROM system.events WHERE event = 'Merge'; OPTIMIZE TABLE new_table_test FINAL; INSERT INTO check_table_test (value2) SELECT value FROM system.events WHERE event = 'Merge'; SELECT count() FROM check_table_test WHERE value2 > value1; DROP TABLE new_table_test; DROP TABLE check_table_test;