title: trying to drop database but says database dosnt exists even thought I can use it
body: <p>Got this weird error happening I am trying to clean up my databases that I am not using. however when I try to drop mysql it says database dosnt exists, however I can use it!! weird or what?! any way for me to get rid of this database from my list.</p>
  
  <pre><code>mysql&gt; show databases;
  +--------------------+
  | Database           |
  +--------------------+
  | information_schema |
  | mysql              |
  | performance_schema |
  | test               |
  +--------------------+
  4 rows in set (0.00 sec)
  
  mysql&gt; use test;
  Database changed
  mysql&gt; drop mysql;
  ERROR 1064 (42000): You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'mysql' at line 1
  mysql&gt; drop database mysql;
  ERROR 1146 (42S02): Table 'mysql.proc' doesn't exist
  mysql&gt; create database mysql;
  ERROR 1007 (HY000): Can't create database 'mysql'; database exists
  mysql&gt; 
  </code></pre>