HQL recursion, how do I do this?

Question

I have a tree structure where each Node has a parent and a Set children. Each Node has a String title, and I want to make

Answer 1

While it isn't possible to write the recursive query you're asking for, it is possible to eager fetch the hierarchy with HQL; doing this would at least allow you to walk the tree in memory without hitting the database for each level.

select n from Node n
left join fetch n.Children