[hibernate-issues] [Hibernate-JIRA] Commented: (HHH-2408) Incorrect SQL generated for JPA QL Update statement involving multiple entities

[Gail Badner (JIRA)]

    [ http://opensource.atlassian.com/projects/hibernate/browse/HHH-2408?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#action_26584 ] 

Gail Badner commented on HHH-2408:
----------------------------------

This query is for a bulk update. HQL for bulk updates is covered in http://www.hibernate.org/hib_docs/v3/reference/en/html/batch.html#batch-direct . This section states that there is a limitation on this type of query that only sub-queries can contain joins.

In the query:

UPDATE Issue i SET i.dueDate = i.dueDate + 10 WHERE i.visit.branch.id = :branchId

there is an implicit join between the issue and visit tables. This join would need to be put in a sub-query, for example:

UPDATE Issue i SET i.dueDate = i.dueDate + 10
WHERE EXISTS(SELECT 1 FROM Visit v WHERE i.visit = v AND v.branch.id = :branchId)

I tried this in the attached test case and it seemed to work.

Gail Badner
SourceLabs - http://www.sourcelabs.com
Dependable Open Source Systems

> Incorrect SQL generated for JPA QL Update statement involving multiple entities
> -------------------------------------------------------------------------------
>
>                 Key: HHH-2408
>                 URL: http://opensource.atlassian.com/projects/hibernate/browse/HHH-2408
>             Project: Hibernate3
>          Issue Type: Bug
>    Affects Versions: 3.2.2
>         Environment: Hibernate 3.2.2 GA, Oracle 9i
>            Reporter: Alex Savitsky
>         Attachments: application.properties, Branch.java, Issue.java, log.txt, PersistentEntity.java, TestCase.zip, Visit.java
>
>
> When generating SQL for statements like this: UPDATE Issue i SET i.dueDate = i.dueDate + 10 WHERE i.visit.branch.id = :branchId, an extra comma is generated at the end of table list: update Issue,  set DUE_DATE=DUE_DATE+10 where BRANCH_ID=?

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