What is Impact on Databases when Update Server to Domino 8

We are updating domino from 6.5 to 8.0

And we keep Notes client 6.5

Just a question:

What problems you have encountered in Database Applications after server upgraded to 8.0?

I want to do the testing for Database application in Server 8.0. But I don’t know what to test. What should I test and what should I expect?

I assumed that Domino Server upgrade should have no impact on all databases. Is that a true?

Subject: Databases and upgrading to Domino 8

As far as what, if any, affect the upgrade will have on your Domino applications, I guess that would depend on the application. Here is a technote that contains general information on upgrading to Domino 8 as well as some information specific to what you need to do in preparation for the upgrade and after the upgrade is complete. It has some database specific information that I thought might answer some of your questions. It references an upgrade from Domino 7 to 8, but you may still find it helpful.

http://www-01.ibm.com/support/docview.wss?uid=swg21303385