/**
  * Removes a database from existence
  *
  * @access  public
  * @param   string  $dbName the database name to drop
  * @return  object  PEAR_Error on failure
  */
 function db_drop($dbName)
 {
     if (DBA_Driver_Builtin::db_exists($dbName)) {
         if (!unlink($dbName)) {
             return $this->raiseError(DBA_ERROR_CANNOT_DROP, NULL, NULL, 'dbname: ' . $dbName);
         }
     } else {
         return $this->raiseError(DBA_ERROR_NOSUCHDB, NULL, NULL, 'dbname: ' . $dbName);
     }
 }