Steve Webber ( https://hibernate.atlassian.net/secure/ViewProfile.jspa?accountId=63f359a... ) *created* an issue Hibernate ORM ( https://hibernate.atlassian.net/browse/HHH?atlOrigin=eyJpIjoiYjRkMmVlMmE2... ) / Bug ( https://hibernate.atlassian.net/browse/HHH-16213?atlOrigin=eyJpIjoiYjRkMm... ) HHH-16213 ( https://hibernate.atlassian.net/browse/HHH-16213?atlOrigin=eyJpIjoiYjRkMm... ) @OneToMany relationship not returning children when use "is null" clause on @ManyToOne relationship ( https://hibernate.atlassian.net/browse/HHH-16213?atlOrigin=eyJpIjoiYjRkMm... ) Issue Type: Bug Affects Versions: 6.1.7 Assignee: Unassigned Components: hibernate-core Created: 21/Feb/2023 06:59 AM Environment: hibernate core 6.1.7.Final java 17.0.6 H2 database 2.1.214 windows operating system Priority: Major Reporter: Steve Webber ( https://hibernate.atlassian.net/secure/ViewProfile.jspa?accountId=63f359a... ) Have a problem that seems to be caused by a combination of hibernate-core 6 and FetchMode.SUBSELECT. Don’t get this problem with hibernate-core 5, or if I use FetchMode.SELECT or FetchMode.JOIN. Difficult to explain. Hopefully the test case on GitHub provides a suitable example: https://github.com/s-webber/hibernate-test-case-orm-6-subselect-children-... ( https://github.com/s-webber/hibernate-test-case-orm-6-subselect-children-... ) Description: Have three entities - Parent , Child and GrandParent. Parent has @ManyToOne relationship on entity GrandParent. Parent has @OneToMany relationship on entity Child. Try to select from Parent where GrandParent is null (do this using query.where(criteriaBuilder.isNull(root.get("grandParent"))) ). Expect the Parent that is returned to be associated with 3 Child entities but is associated with none. See test case: https://github.com/s-webber/hibernate-test-case-orm-6-subselect-children-... ( https://github.com/s-webber/hibernate-test-case-orm-6-subselect-children-... ) ( https://hibernate.atlassian.net/browse/HHH-16213#add-comment?atlOrigin=ey... ) Add Comment ( https://hibernate.atlassian.net/browse/HHH-16213#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- sha1:3fa9804 )