For the People, designing Database Independence in Compiere:

have a Look at:

www.openquasar.de

it is a Java Database Access Layer, like TopLink from Oracle, and EntityBeans from Sun.

Here is a Comparison:
http://www.openquasar.de/de/quasar/ematrix-persistence.html

Open Quasar is from sd&m, a very large Company.

e.g. they make Global Ordering System for DaimlerChrysler.

Regards,

Franz