Hello Ari Thank you for replying. I worked through the tutorial bevor we picked Cayenne as ORM. I allready have a working mapping that has allready been deployed to our dev environment and MySQL server. Thus fare everything went smooth.
What I am trying to achive is this: https://cayenne.apache.org/docs/3.0/modeling-vertical-inheritance.html The section in the 4.0 Version of the Guid is empty so I assumed this is still valid. I hope this gets sorted into the right thread, because I did the registration wrong the first time :/
