title: Fatal error: Call to undefined method CI_DB_pdo_driver::where() in
body: <p>I’m using PDO driver to access MySQL database. Everything is working OK on that part. My database.php looks like this:</p>
  
  <pre><code>$active_group = 'default';
  $active_record = FALSE;
  
  $db['default']['hostname'] = 'mysql:host=127.0.0.1:3386';
  $db['default']['username'] = 'root';
  $db['default']['password'] = '';
  $db['default']['database'] = 'mydatabase';
  $db['default']['dbdriver'] = 'pdo';
  $db['default']['dbprefix'] = '';
  $db['default']['pconnect'] = TRUE;
  $db['default']['db_debug'] = TRUE;
  $db['default']['cache_on'] = FALSE;
  $db['default']['cachedir'] = '';
  $db['default']['char_set'] = 'utf8';
  $db['default']['dbcollat'] = 'utf8_general_ci';
  $db['default']['swap_pre'] = '';
  $db['default']['autoinit'] = TRUE;
  $db['default']['stricton'] = FALSE; 
  </code></pre>
  
  <p>I don’t use Active Record..</p>
  
  <p>The problem occurred when I auto-loaded session library and set it to use database. I created table in my database, and on first visit to site, a record gets inserted into session table. No problem there.
  An error occurs on subsequent visits to the site. I’m getting following:</p>
  
  <pre><code>Fatal error: Call to undefined method CI_DB_pdo_driver::where() in P:\Git\TengWebsite\system\libraries\Session.php on line 201
  </code></pre>