乌龙之Ignoring query to other database问题

问题现象：

[root@zxdb05 ~]# mysql -root -p
Enter password:
Welcome to the MySQL monitor.  Commands end with ; or \g.
Your MySQL connection id is 5
Server version: 5.6.25-log MySQL Community Server (GPL)

Copyright (c) 2000, 2015, Oracle and/or its affiliates. All rights reserved.

Oracle is a registered trademark of Oracle Corporation and/or its
affiliates. Other names may be trademarks of their respective
owners.

Type 'help;' or '\h' for help. Type '\c' to clear the current input statement.

mysql> show databases;
Ignoring query to other database

问题分析：

查看错误日志，并无错误记录信息；

后来发现原来是连接的时候少写了u参数。

[root@zxdb05 ~]# mysql -root –p

改成：[root@zxdb05 ~]# mysql -uroot –p

少写了参数居然能够连接成功，但不能进行操作，非常不人性化的设计