MySQL事件自动kill运行时间超时的SQL

delimiter $
create event my_long_running_trx_monitor
on schedule every 1 minute
starts '2015-09-15 11:00:00'
on completion preserve enable do
begin
  declare v_sql varchar(500);
  declare no_more_long_running_trx integer default 0; 
  declare c_tid cursor for
    select concat ('kill ',trx_mysql_thread_id,';') 
    from information_schema.innodb_trx 
    where timestampdiff(minute,trx_started,now()) >= 1;
  declare continue handler for not found
    set no_more_long_running_trx=1;

  open c_tid;
  repeat
    fetch c_tid into v_sql;
 set @v_sql=v_sql;
 prepare stmt from @v_sql;
 execute stmt;
 deallocate prepare stmt;
  until no_more_long_running_trx end repeat;
  close c_tid;
end;
$
delimiter ;