[hibernate-issues] [Hibernate-JIRA] Commented: (HHH-16) Explicit joins on unrelated classes
James Carman (JIRA)
noreply at atlassian.com
Thu Aug 30 12:09:26 EDT 2007
[ http://opensource.atlassian.com/projects/hibernate/browse/HHH-16?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#action_27980 ]
James Carman commented on HHH-16:
---------------------------------
Has anyone started work on this feature? I would like to give a hand (we need this feature on our project at work), but I don't want to start from scratch if someone has already done some legwork.
> Explicit joins on unrelated classes
> -----------------------------------
>
> Key: HHH-16
> URL: http://opensource.atlassian.com/projects/hibernate/browse/HHH-16
> Project: Hibernate3
> Issue Type: New Feature
> Components: core
> Affects Versions: antlr-rework
> Environment: Any
> Reporter: David Lloyd
> Assignee: Steve Ebersole
> Fix For: antlr-rework
>
>
> It would be nice to be able to do explicit joins on unrelated classes with HQL:
> (hope this renders correctly)
> select empl, phone
> from org.example.Employee empl
> left outer join org.example.PhoneBook phone
> on phone.lastName = empl.lastName
> and phone.firstName = empl.firstName
> where empl.salaryGrade > 10
> Note that this would also implicity solve HB-1089 because you could list join criteria that match what Hibernate would have chosen anyway (i.e., list a many-to-one relationship as a criteria explicitly).
> Syntactically this could be disambiguated from the existing join syntax because the token after "join" is a class name rather than a property name.
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