[hibernate-issues] [Hibernate-JIRA] Created: (ANN-562) CLONE -Discriminator column not supported with JOINED strategy: another reason

[Amit Kasher (JIRA)]

CLONE -Discriminator column not supported with JOINED strategy: another reason
------------------------------------------------------------------------------

         Key: ANN-562
         URL: http://opensource.atlassian.com/projects/hibernate/browse/ANN-562
     Project: Hibernate Annotations
        Type: Bug

    Versions: 3.1beta6    
 Environment: Hibernate 3.1rc2, Hibernate Annotations 3.1b6
    Reporter: Amit Kasher


Section 9.1.27 of the EJB3 persistence public draft says, "The DiscriminatorColumn annotation is used to define the discriminator column for SINGLE_TABLE and JOINED mapping strategies." But Hibernate ignores the DiscriminatorColumn annotation when the mapping strategy is JOINED; when a JOINED entity is persisted, its discriminator column is not included in the SQL "insert" statement, resulting in a not-null constraint violation if the discriminator column is marked NOT NULL in the database.

The JOINED strategy with discriminators is pretty ubiquitous in EJB3 sample code and tutorials out on the net, so lots of people are likely to run into this as they try out EJB3 for the first time. A few examples:

http://www.oracle.com/technology/tech/java/oc4j/ejb3/howtos-ejb3/howtoejb30inheritance/doc/how-to-ejb30-inheritance.html
http://www.solarmetric.com/Software/Documentation/4.0.0EA/docs/full/html/ejb3_overview_mapping_discrim.html
http://www.caucho.com/resin-3.0/amber/tutorial/cmp-inherit/index.xtp

-- 
This message is automatically generated by JIRA.
-
If you think it was sent incorrectly contact one of the administrators:
   http://opensource.atlassian.com/projects/hibernate/secure/Administrators.jspa
-
For more information on JIRA, see:
   http://www.atlassian.com/software/jira