[hibernate-issues] [JIRA] (HHH-16187) Recursive join fetch

Christian Beikov ( https://hibernate.atlassian.net/secure/ViewProfile.jspa?accountId=557058%... ) *created* an issue Hibernate ORM ( https://hibernate.atlassian.net/browse/HHH?atlOrigin=eyJpIjoiZDg2ODY1YzM0... ) / New Feature ( https://hibernate.atlassian.net/browse/HHH-16187?atlOrigin=eyJpIjoiZDg2OD... ) HHH-16187 ( https://hibernate.atlassian.net/browse/HHH-16187?atlOrigin=eyJpIjoiZDg2OD... ) Recursive join fetch ( https://hibernate.atlassian.net/browse/HHH-16187?atlOrigin=eyJpIjoiZDg2OD... ) Issue Type: New Feature Assignee: Unassigned Components: hibernate-core Created: 15/Feb/2023 07:53 AM Fix Versions: 6.wishlist Priority: Major Reporter: Christian Beikov ( https://hibernate.atlassian.net/secure/ViewProfile.jspa?accountId=557058%... ) Transitioning this over from the GH discussion ( https://github.com/hibernate/hibernate-orm/discussions/6100 ) : We added the recursive CTE construct to model the canonical way to do recursive queries in HQL, but I think it would be nice to extend this a bit. Here are a few ideas. The idea is that we introduce a new kind of join, a recursive join, which we translate to a recursive CTE. Recursive joins would only be allowed on self referencing @ManyToOne / @OneToMany(mappedBy) associations. If we want to support EAGER fetching of recursive associations we would probably need some sort of @RecursiveParent / @RecursiveChildren annotation to mark associations in an entity model, so that we can generate the proper query, but I guess we can ignore that for now. The really interesting part is when join fetching collections e.g. from Entity1 a recursive join fetch a.children , as that has an implication on the Fetch we generate and how we process results, since all nested collection will become initialized this way. ( https://hibernate.atlassian.net/browse/HHH-16187#add-comment?atlOrigin=ey... ) Add Comment ( https://hibernate.atlassian.net/browse/HHH-16187#add-comment?atlOrigin=ey... ) Get Jira notifications on your phone! Download the Jira Cloud app for Android ( https://play.google.com/store/apps/details?id=com.atlassian.android.jira.... ) or iOS ( https://itunes.apple.com/app/apple-store/id1006972087?pt=696495&ct=Em... ) This message was sent by Atlassian Jira (v1001.0.0-SNAPSHOT#100216- sha1:a1e7611 )