[hibernate-issues] [Hibernate-JIRA] Commented: (ANN-748) @JoinColumn overrides scale and percision in ManyToOne map..

[Andrew C. Oliver (JIRA)]

    [ http://opensource.atlassian.com/projects/hibernate/browse/ANN-748?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#action_30346 ] 

Andrew C. Oliver commented on ANN-748:
--------------------------------------

I looked at the actual bug a bit more.  It looks like the JoinColumn mapping assumes that the column definition is completely void even if it was also defined by ManyToOne..  Also it might make sense to have a Hibernate specific @JoinColumn since @Column is not allowed that would allow you to override precision etc.  

> @JoinColumn overrides scale and percision in ManyToOne map..
> ------------------------------------------------------------
>
>                 Key: ANN-748
>                 URL: http://opensource.atlassian.com/projects/hibernate/browse/ANN-748
>             Project: Hibernate Annotations
>          Issue Type: Bug
>    Affects Versions: 3.4.0.CR1
>         Environment: Postgresql but not Hypersonic (haven't tried other DBs, but suspect any real non-java db will replicate)
>            Reporter: Andrew C. Oliver
>         Attachments: patch.tar.gz
>
>
> http://forum.hibernate.org/viewtopic.php?t=987527
> Since you asked nicely...
> This is a patch against your test cases. 
> Sorry for the not patch style patch.  It is against the latest download of Annotations (3.4.0.CR1).  I'm on a hotel network that seems to really make SVN angry.  
> There are 4 files:
> 1. Bunny    has many
> 2. PointyTooth (teeth)
> 3. IdTest.java, only "testBlownPrecision" is new and "getMappings" includes the rabid bunny and teeth
> 4. UUIDGenerator - I wouldn't have included it but I couldn't find a decent way to autogenerate 128-bit keys.  (The linked wikipedia article is amusing).
> You'll probably want to unzip these into the annotations root directory, then do the svn diff.  Following this you may want to pretty print. 
> As the test notes, it will FAIL with the @JoinColumn mapping and succeed if it is commented out.  The failure notes a precision error.  Obviously batching must be disabled to read it.  If you look at the generated table it will have like NUMBER[19].  With JoinColumn commented out it is the expected NUMBER[128].  Thanks to PaaKow Acquah for finding this.
> If you want more details, I'll be a TacoMac having another Aventinus...

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