[hibernate-issues] [Hibernate-JIRA] Commented: (HHH-3684) Sybase - Setting FetchMode.JOIN fails if there are 3 or more joins and at least one join involves a union

Sybase - Setting FetchMode.JOIN fails if there are 3 or more joins and at least one join involves a union --------------------------------------------------------------------------------------------------------- Key: HHH-3684 URL: http://opensource.atlassian.com/projects/hibernate/browse/HHH-3684 Project: Hibernate Core Issue Type: Bug Components: core Reporter: Gail Badner Assignee: Gail Badner This is reproduced by UnionSubclassTest.testUnionSubclassFetchMode().. This may be due to a bug in Sybase. A similar problem is discussed here: http://www.forumtopics.com/busobj/viewtopic.php?p=442226&sid=40bd9624... For the unit test mentioned above, changing: select ... from ( select ... from humans union select ... from employees ) this_ inner join locations location2_ on this_.location=location2_.id left outer join ( select ... from employees union select ... from humans union select ... from aliens ) beings3_ on location2_.id=beings3_.location : to: select ... from ( select ... from humans union select ... from employees ) this_ inner join (locations location2_ left outer join ( select ... from employees union select ... from humans union select ... from aliens ) beings3_ on location2_.id=beings3_.location) : on this_.location=location2_.id fixes the problem. This changer is similar to what is documented for a "right-nested outer join" at http://infocenter.sybase.com/help/topic/com.sybase.infocenter.dc32300.150....