REPEATABLE-READ RR模式区间锁

修改为RR模式:

开启事务[1]:

START TRANSACTION ;

mysql> START TRANSACTION ;
Query OK, 0 rows affected (0.00 sec)

mysql> select connection_id();
+-----------------+
| connection_id() |
+-----------------+
|               1 |
+-----------------+
1 row in set (0.00 sec)

mysql> use xypp;
Reading table information for completion of table and column names
You can turn off this feature to get a quicker startup with -A

Database changed
mysql> update test_mysql set events_id='xxxxxx' where events_id='aaa9999';
Query OK, 1 row affected (0.01 sec)
Rows matched: 1  Changed: 1  Warnings: 0

mysql> select @@tx_isolation;
+-----------------+
| @@tx_isolation  |
+-----------------+
| REPEATABLE-READ |
+-----------------+
1 row in set (0.00 s