public function __construct($vals = null)
 {
     if (!isset(self::$_TSPEC)) {
         self::$_TSPEC = array(1 => array('var' => 'db_name', 'type' => TType::STRING), 2 => array('var' => 'tbl_name', 'type' => TType::STRING), 3 => array('var' => 'max_parts', 'type' => TType::I16));
     }
     if (is_array($vals)) {
         if (isset($vals['db_name'])) {
             $this->db_name = $vals['db_name'];
         }
         if (isset($vals['tbl_name'])) {
             $this->tbl_name = $vals['tbl_name'];
         }
         if (isset($vals['max_parts'])) {
             $this->max_parts = $vals['max_parts'];
         }
     }
 }