[hibernate-issues] [Hibernate-JIRA] Commented: (HHH-1657) hql update generate wrong sql with joined subclass hierarcy

[John Baker (JIRA)]

    [ http://opensource.atlassian.com/projects/hibernate/browse/HHH-1657?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#action_30637 ] 

John Baker commented on HHH-1657:
---------------------------------

Alright, I am talking rubbish and Hibernate does not behave that way - this code I'm looking at deletes the classes in that order.  However (!), there's another demonstration of the bug at hand.  I find it curious that a couple SQL statements are issued where eventId is unqualified but doesn't fail.  I wonder if it's because ISSO extends Event where as BasicLogin and IWALogin extend Login (which in turn extends Event)?

> hql update generate wrong sql with joined subclass hierarcy
> -----------------------------------------------------------
>
>                 Key: HHH-1657
>                 URL: http://opensource.atlassian.com/projects/hibernate/browse/HHH-1657
>             Project: Hibernate3
>          Issue Type: Bug
>          Components: query-hql
>         Environment: Hibernate 3.2.0cr1, Hibernate 3.1.3
>            Reporter: Alexey Romanchuk
>            Assignee: Gail Badner
>            Priority: Critical
>             Fix For: 3.2.x, 3.3.x
>
>
> Let suppose that we have two joined subclass entities: Parent (id PK) and Child (id PK) that mapped with joined subclass method.
> When I try to update Child by id with hql:
> update Child c set c.field = 'value' where c.id = 1234
> hibernate generates joined tables like 
> insert into HT_parent select child0_.id as id from child child0_ inner join parent child0_1_ on child0_.id=child0_1_.id  wher id in = 1234
> look at last condition. hibernate use id WITH OUT tables alias that cause sql exception: column reference "id" is ambiguous

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