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From "Adam Furmanczuk (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (OPENJPA-2054) Constant join fails
Date Wed, 30 Jan 2013 21:51:12 GMT

    [ https://issues.apache.org/jira/browse/OPENJPA-2054?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13566939#comment-13566939
] 

Adam Furmanczuk commented on OPENJPA-2054:
------------------------------------------

Well one ugle workarround is to specify the constants as attributes, having same name as value.
                
> Constant join fails
> -------------------
>
>                 Key: OPENJPA-2054
>                 URL: https://issues.apache.org/jira/browse/OPENJPA-2054
>             Project: OpenJPA
>          Issue Type: Bug
>    Affects Versions: 2.1.0
>            Reporter: Michael Spiro
>              Labels: Constant, join
>
> According to the documentation (Part 3, chapter 7, paragraph 6), join criteria can be
defined so that a column in the source or target table must have some constant value. The
constant value should be specified in the attribute "referencedColumnName" of the @JoinColumn
annotation. If the constant is a string then its value should be enclosed first in single
quotes and then in double quotes like this:
> @JoinColumn(name="table.column", referencedColumnName="'value'")
> A numeric constant value needs just a single pair of double quotes:
> @JoinColumn(name="table.column", referencedColumnName="2")
> However a practical test shows that both options produce an error.

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