CREATE TABLE bug38999_1 (a int not null primary key, b int not null, key (b)) engine=innodb;
CREATE TABLE bug38999_2 (a int not null primary key, b int not null, key (b)) engine=innodb;
INSERT INTO bug38999_1 values (1,1),(2,2),(3,3),(4,4),(5,5),(6,6),(7,7),(8,8),(9,9),(10,10),(11,11),(12,12);
INSERT INTO bug38999_2 values (1,1),(2,2),(3,3),(4,4),(5,5),(6,6),(7,7),(8,8),(9,9);
update bug38999_1,bug38999_2 set bug38999_1.a=bug38999_1.a+100;
select * from bug38999_1;
a	b
101	1
102	2
103	3
104	4
105	5
106	6
107	7
108	8
109	9
110	10
111	11
112	12
update bug38999_1,bug38999_2 set bug38999_1.a=bug38999_1.a+100 where bug38999_1.a=101;
select * from bug38999_1;
a	b
201	1
102	2
103	3
104	4
105	5
106	6
107	7
108	8
109	9
110	10
111	11
112	12
update bug38999_1,bug38999_2 set bug38999_1.b=bug38999_1.b+10 where bug38999_1.b=2;
select * from bug38999_1;
a	b
201	1
103	3
104	4
105	5
106	6
107	7
108	8
109	9
110	10
111	11
102	12
112	12
update bug38999_1,bug38999_2 set bug38999_1.b=bug38999_1.b+2,bug38999_2.b=bug38999_1.b+10 where bug38999_1.b between 3 and 5 and bug38999_1.a=bug38999_2.a+100;
select * from bug38999_1;
a	b
201	1
103	5
104	6
106	6
105	7
107	7
108	8
109	9
110	10
111	11
102	12
112	12
select * from bug38999_2;
a	b
1	1
2	2
6	6
7	7
8	8
9	9
3	13
4	14
5	15
drop table bug38999_1,bug38999_2;