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

[Pim van Dongen (JIRA)]

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
         Attachments: JSTNoWarning.txt

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.

--
This message is automatically generated by JIRA.
For more information on JIRA, see: http://www.atlassian.com/software/jira