First of all thanks for the quick response.

And i do not mean to interfere but i thought i would be good if i let you bare in mind a couple of points

I am using the JPA porperties. I was under the impresion that those should have the same behaviour regardless the implementation of JPA.

The configuration i have is pure JPA:
javax.persistence.schema-generation.scripts.action = drop-and-create
javax.persistence.schema-generation.scripts.drop-targe = some/folder/drop.sql
javax.persistence.schema-generation.scripts.create-target = some/folder/create.sql

In version 4.3.6 this configuration would truncate the files. Thus i would expect that this would be the same behaviour in later versions and adding the option to append instead of truncate should be the additional configuration. At least that would be my understanding, although you know this a lot better than me.