[mysql] How can I stop a running MySQL query?

Connect to mysql

mysql -uusername -p  -hhostname

show full processlist:

mysql> show full processlist;
+---------+--------+-------------------+---------+---------+------+-------+------------------+
| Id      | User   | Host              | db      | Command | Time | State | Info             |
+---------+--------+-------------------+---------+---------+------+-------+------------------+
| 9255451 | logreg | dmin001.ops:37651 | logdata | Query   |    0 | NULL  | show processlist |
+---------+--------+-------------------+---------+---------+------+-------+------------------+

Kill the specific query. Here id=9255451

mysql> kill 9255451;

If you get permission denied, try this SQL:

CALL mysql.rds_kill(9255451)