Hello.

I am pretty new to Hibernate and have some problems with a HQL query.
I have persisted some objects, which have a structure like this:

class Document:
long id
List<String> tags

Now I want to query all tags of all documents.
It isn't important if the result is a list of lists or all tags together in one list.

An easy query like "doc.tags from Document as doc", doesn't solve the problem. I get an exception, that tags is not an entity.
The data is there. All in a document_tags table. A normal SQL query would be easy, but how do I fetch it with HQL? Can someone help me out?

Sorry, my posting was a bit too fast. I finally found the solution after trying many query strings.
select tags from Document as doc inner join doc.tags as tags