Horde_Db_Adapter_Base::disconnect PHP Method

    public function disconnect()
    {
        $this->_connection = null;
        $this->_active = false;
    }

 /**
  * Disconnect from db
  */
 public function disconnect()
 {
     if ($this->_connection) {
         oci_close($this->_connection);
     }
     parent::disconnect();
 }