[hibernate-issues] [Hibernate-JIRA] Updated: (HHH-7181) Mixing inheritance strategy in a entity hierarchy is not allowed message for JOINED + SINGLE_TABLE

[Steve Ebersole (JIRA)]

     [ https://hibernate.onjira.com/browse/HHH-7181?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Steve Ebersole updated HHH-7181:
--------------------------------

    Fix Version/s: 5.0.0

The fix for this is already in place in the 5.0 codebase.  I don't foresee this being addressed in 4.x.  But I want to leave this issue open so that we make certain to add tests for this.

> Mixing inheritance strategy in a entity hierarchy is not allowed message for JOINED + SINGLE_TABLE
> --------------------------------------------------------------------------------------------------
>
>                 Key: HHH-7181
>                 URL: https://hibernate.onjira.com/browse/HHH-7181
>             Project: Hibernate ORM
>          Issue Type: New Feature
>          Components: metamodel
>    Affects Versions: 4.0.0.CR5
>         Environment: Hibernate 4.0.0.CR5 (annotations 4.0.0.CR2), HSQLDB 2.2.6
>            Reporter: Pim van Dongen
>            Priority: Minor
>             Fix For: 5.0.0
>
>         Attachments: JSTNoWarning.txt
>
>   Original Estimate: 3h
>  Remaining Estimate: 3h
>
> When mixing inheritance strategies in a single entity hierarchy like the following:
> A with @Inheritance(strategy=InheritanceType.SINGLE_TABLE)
> B extends A
> C extends A with @Inheritance(strategy=InheritanceType.JOINED)
> D extends C
> E extends C
> The following warning is given by Hibernate: 
> WARN: HHH000138: Mixing inheritance strategy in a entity hierarchy is not allowed, ignoring sub strategy in: com.example.C
> However, when I reverse this,
> A with @Inheritance(strategy=InheritanceType.JOINED)
> B extends A
> C extends A with @Inheritance(strategy=InheritanceType.SINGLE_TABLE)
> D extends C
> E extends C
> Hibernate does NOT give me a warning. Looking at the database reveals that the tables A, B, C, D and E are made (where only A, B and C should have been created).
> "Feature" request: Please give a warning when encountering a mixed inheritance strategy that is not supported by Hibernate, such as JOINED + SINGLE_TABLE.
> I've attached some files (one file listing all teh codez) that I used when encountering the issue, namely the classes A through E, and some testing code.
> I did not provide a testcase because I don't know of an exact testcase that could be used to reproduce the issue that it doesn't make the tables properly AND doesn't display a warning.
> I did provide a method which you can run through debug, during which you can examine the database or logs to see that the tables haven't been made properly. Combine it with console output, and there you go.

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