set storage_engine='tokudb';
CREATE TABLE `t2` (
  `c1` int(11) NOT NULL,
  `c2` int(10) unsigned DEFAULT NULL,
  `c3` int(11) DEFAULT NULL,
  KEY `c2` (`c2`),
  KEY `c1` (`c1`)
);
INSERT INTO t2 (c1,c2,c3) VALUES 
(-12,	12,	12),
(-11,	NULL,	11),
(-9,	9,	9),
(-8,	8,	8),
(-7,	7,	7),
(-6,	6,	6),
(-5,	5,	5),
(-4,	4,	4),
(-3,	3,	3),
(-2147483648,	2,	2),
(-2147483648,	1,	1),
(50,	50,	10),
(-2147483648,	0,	13),
(2147483647,	4294967295,	14),
(0,	2147483648,	15),
(2147483647,	2147483647, 16);
SELECT * FROM t2;
UPDATE t2 SET c1=-2147483648 WHERE c2 >= 0 ORDER BY c2 DESC LIMIT 2;
SELECT * FROM t2;
DROP TABLE t2;