mysql -vvv -u root -p123456 test -e "truncate t_target;alter event ev1 on schedule at current_timestamp enable;alter event ev2 on schedule at current_timestamp enable;alter event ev3 on schedule at current_timestamp enable;alter event ev4 on schedule at current_timestamp enable;"
该命令行顺序触发了4个事件，但不会等前一个执行完才执行下一个，而是立即向下执行。这可从命令的输出可以清除看到：
[mysql@hdp2~]$mysql -vvv -u root -p123456 test -e "truncate t_target;alter event ev1 on schedule at current_timestamp enable;alter event ev2 on schedule at current_timestamp enable;alter event ev3 on schedule at current_timestamp enable;alter event ev4 on schedule at current_timestamp enable;"
mysql: [Warning] Using a password on the command line interface can be insecure.
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truncate t_target
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Query OK, 0 rows affected (0.06 sec)
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alter event ev1 on schedule at current_timestamp enable
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Query OK, 0 rows affected (0.02 sec)
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alter event ev2 on schedule at current_timestamp enable
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Query OK, 0 rows affected (0.00 sec)
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alter event ev3 on schedule at current_timestamp enable
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Query OK, 0 rows affected (0.02 sec)
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alter event ev4 on schedule at current_timestamp enable
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Query OK, 0 rows affected (0.00 sec)
Bye
[mysql@hdp2~]$
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