[Hibernate-issues] [Hibernate-JIRA] Created: (HHH-1917) Bulk Delete on the owning side of a ManyToMany relation needs to delete corresponding rows from the JoinTable

[Keenan R. (JIRA) <no...@at...>]

Bulk Delete on the owning side of a ManyToMany relation needs to delete corresponding rows from the JoinTable
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         Key: HHH-1917
         URL: http://opensource.atlassian.com/projects/hibernate/browse/HHH-1917
     Project: Hibernate3
        Type: Bug

  Components: core  
    Versions: 3.2.0.cr2    
 Environment: Hibernate 3.2 cr2
Hibernate Annotations 3.2.0.CR1 
Hibernate Entity Manager 3.2.0.CR1 
Oracle 10.1, with Oracle 10.2 JDBC Driver
    Reporter: Keenan Ross


Emmanuel says in http://forum.hibernate.org/viewtopic.php?t=961140,

 [quote]I also know we need to fix some limitations regarding associations table updates / delete and bulk operations[/quote]

This issue provides a reminder that this task is pending.

For bulk deletes, consider this scenario: Assume Person and Group entities in a bidirectional ManyToMany relationship with Group as the owning side. This implies a Join table, with the default name of Group_Person. Currently issuing

em.createQuery("delete from Group").executeUpdate();

makes no attempt to delete the corresponding rows from Group_Person, even though Group is the owning side, giving constraint errors. Since Group_Person has no corresponding entity, I don't think the spec's prohibition on lifecycle operations or cascading applies here. The only workarround is to individually delete the Groups.
--keenan


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