We noticed that our recursive CTE query returns incomplete results because it does not return the whole hierarchy. We already created the Jira issue https://hibernate.atlassian.net/browse/HHH-16465 where a fix was implemented in Hibernate 6.2.4, but it still didn’t fix the problem in our environment.

When adding our unit test locally in the hibernate-orm project it passed, while it failed in our environment. I quickly suspected the collation as the culprit and indeed: Hibernate testing uses “SQL_Latin1_General_CP1_CI_AS” while we are using “Latin1_General_CI_AS”.

When running the test you added (CteCycleTests#testRecursiveCycleClause) in a database with the collation “Latin1_General_CI_AS” it fails as well.