CREATE TABLE t3(c1 TINYINT UNSIGNED NOT NULL, c2 TINYINT NULL, c3 SMALLINT, c4 MEDIUMINT ,
c5 INT, c6 INTEGER, c7 BIGINT, index idx(c2,c7)) engine=maria;
INSERT INTO t3 VALUES(101,-102,103,104,105,106,107),(108,-109,110,111,112,113,114),(115,-116,117,118,119,120,121),(122,-123,124,125,126,127,128);
INSERT INTO t3 VALUES(101,-102,103,104,105,106,101),(101,-102,103,104,105,106,102),(101,-103,103,104,105,106,107),(101,-104,103,104,105,106,107);
INSERT INTO t3 VALUES(105,NULL,102,103,104,105,106);
INSERT INTO t3 VALUES('','',17,18,19,20,21);
INSERT INTO t3 VALUES(-1,124,22,23,24,25,26);
INSERT INTO t3 VALUES('101.34 a','a',37,38,39,40,41);
INSERT INTO t3 VALUES(0,-128,1,2,3,4,5),(255,127,6,7,8,9,10);
SELECT * FROM t3 WHERE c2 <> -128 ORDER BY c2,c7 DESC LIMIT 2;
SELECT * FROM t3 WHERE c2 < -128 ORDER BY c2,c7;
SELECT * FROM t3 WHERE c2 < -128 ORDER BY c2,c7 LIMIT 2;

drop table t3;