Scott Marlow I do not know how exactly WF implements EXTENDED PC support specific to each underlying provider. But I am just saying that Hibernate ORM does not even understand the idea of an EXTENDED PC; it just understands that its PC (Session) has been set to a certain FlushMode and that it has been set to autoClose or not.

This Jira is about extending support for delaying IDENTITY insertions to cases where we recognize that the Session FlushMode is set to MANUAL (or COMMIT). That would happen to catch cases where some container (WF e.g.) implementing EXTENDED PC support via delegation to Hibernate.