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https://issues.apache.org/jira/browse/OPENJPA-1169?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12728998#action_12728998
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Michael Dick commented on OPENJPA-1169:
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Sounds like a good idea. In hindsight we should have added such a property 
(Compatibility class) earlier I guess. 

Jianfeng, can you illustrate the problem without U2JPA? 

> OpenJPA 1.3.0's query parameter checking is too restricitive for native 
> queries that used to work with OpenJPA 1.2.x
> --------------------------------------------------------------------------------------------------------------------
>
>                 Key: OPENJPA-1169
>                 URL: https://issues.apache.org/jira/browse/OPENJPA-1169
>             Project: OpenJPA
>          Issue Type: Bug
>          Components: kernel
>    Affects Versions: 1.3.0
>         Environment: Windows XP
>            Reporter: Jianfeng Mao
>
> OpenJPA 1.3.0's new query positional parameter handling are a lot stricter 
> than 1.2.x and causes U2JPA queries that can have arbitrary number of 
> input/output parameters to fail. A solution is suggested by Pinaki Poddar to 
> introduce a property that specifies a ParameterIndexingStyle to restore the 
> 1.2.x behavior for U2JPA but keep its compatibility with the current OpenJPA 
> core. 

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