copyright: 2009 Julien Issler This class was get originally from the Copix project (CopixDBConnectionPostgreSQL, Copix 2.3dev20050901, http://www.copix.org) Few lines of code are still copyrighted 2001-2005 CopixTeam (LGPL licence). Initial authors of this Copix class are Gerald Croes and Laurent Jouanneau, and this class was adapted/improved for Jelix by Laurent Jouanneau