title: mysql table with varchar primary key field
body: <p>I have create users table with following structure </p>
  
  <pre><code>CREATE TABLE `users` (
     `id` varchar(36) NOT NULL,
     `first_name` varchar(100) NOT NULL,
     `last_name` varchar(100) NULL,
     `email` varchar(100) NOT NULL,
     `password` varchar(100) NOT NULL,
     PRIMARY KEY (`id`)
  ) ENGINE=InnoDB DEFAULT CHARSET=utf8;
  </code></pre>
  
  <p>I just want to auto filled id value when we insert new row.</p>