Session 1:mysql>  select connection_id();+-----------------+| connection_id() |+-----------------+|               2 |+-----------------+1 row in set (0.00 sec)mysql> start transaction;Query OK, 0 rows affected (0.00 sec)mysql> select * from t200 where phoneNo between 30 and 40 for update;+----+---------+-------------+--------+| sn | phoneNo | channelType | status |+----+---------+-------------+--------+| 30 | 30      |           2 |      1 || 34 | 34      |           3 |      2 || 39 | 39      |           3 |      2 |+----+---------+-------------+--------+3 rows in set (0.00 sec)mysql>  select @@tx_isolation; +-----------------+| @@tx_isolation  |+-----------------+| REPEATABLE-READ |+-----------------+1 row in set (0.00 sec)mysql> explain  select * from t200 where phoneNo between 30 and 40 for update;+----+-------------+-------+------+---------------+------+---------+------+------+-------------+| id | select_type | table | type | possible_keys | key  | key_len | ref  | rows | Extra       |+----+-------------+-------+------+---------------+------+---------+------+------+-------------+|  1 | SIMPLE      | t200  | ALL  | t200_idx1     | NULL | NULL    | NULL |   34 | Using where |+----+-------------+-------+------+---------------+------+---------+------+------+-------------+Session 2:mysql>  insert into t200 values(29,29,4,1);ERROR 1205 (HY000): Lock wait timeout exceeded; try restarting transactionmysql>  insert into t200 values(100,100,4,1);ERROR 1205 (HY000): Lock wait timeout exceeded; try restarting transactionmysql>  insert into t200 values(1000,1000,4,1);ERROR 1205 (HY000): Lock wait timeout exceeded; try restarting transactionmysql>  insert into t200 values(1000,1000,4,1);