select @default_binlog_format:=@@global.binlog_format;
@default_binlog_format:=@@global.binlog_format
MIXED
set global binlog_format=row;
connect  con1,localhost,root,,;
connect  con2,localhost,root,,;
connection con1;
set session debug_dbug="+d,optimizer_innodb_ds_mrr";
set autocommit=0;
use test;
drop table if exists t1;
Warnings:
Note	1051	Unknown table 'test.t1'
create table t1 (dummy int primary key, a int unique, b int) engine=innodb;
insert into t1 values(1,1,1),(3,3,3),(5,5,5);
commit;
set session transaction isolation level repeatable read;
select @@tx_isolation;
@@tx_isolation
REPEATABLE-READ
start transaction;
select * from t1 where a > 2 for update;
dummy	a	b
3	3	3
5	5	5
connection con2;
use test;
set autocommit=0;
start transaction;
select 1;
1
1
insert into t1 values(2,2,2);
ERROR HY000: Lock wait timeout exceeded; try restarting transaction
rollback;
connection con1;
rollback;
drop table t1;
connection default;
set global binlog_format=@default_binlog_format;