1create table t1(a bit(1), b int auto_increment ,id int,  index(a,b));
2insert into t1 values(1,null,1);
3insert into t1 values(1,null,2);
4insert into t1 values(0,null,3);
5insert into t1 values(0,null,4);
6select a+0, b as auto_increment , id from t1 order by id;
7drop table t1;
8create table t1(a int auto_increment, b bit(5) ,id int, index (b,a));
9insert into t1 values(null,b'1',1);
10insert into t1 values(null,b'1',2);
11insert into t1 values(null,b'11',3);
12insert into t1 values(null,b'11',4);
13select a as auto_increment, b+0, id from t1 order by id;
14drop table t1;
15create table t1(a bit(1), b int auto_increment , c bit(1) , d bit(1), id int,index(a,c,b,d));
16insert into t1 values(1,null,1,1,1);
17insert into t1 values(1,null,1,1,2);
18insert into t1 values(0,null,1,1,3);
19insert into t1 values(1,null,0,1,4);
20select a+0, b as auto_increment, c+0, d+0, id from t1 order by id;
21drop table t1;
22CREATE TABLE t1 (b BIT(1), pk INTEGER AUTO_INCREMENT PRIMARY KEY);
23ALTER TABLE t1 ADD INDEX(b,pk);
24INSERT INTO t1 VALUES (1,b'1');
25ALTER TABLE t1 DROP PRIMARY KEY;
26select b+0, pk as auto_increment from t1;
27DROP TABLE t1;
28