[hibernate-issues] [Hibernate-JIRA] Commented: (HHH-5041) @ManyToOne not working with @Formula

[Sharath Reddy (JIRA)]

    [ http://opensource.atlassian.com/projects/hibernate/browse/HHH-5041?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=36729#action_36729 ] 

Sharath Reddy commented on HHH-5041:
------------------------------------

You should be posting this in the forums first. Check if this works for you:

@Entity
@Table(name="product")
public class Product
{
    @Id
    public Integer id;
    
    @Column(name="product_idnf", length=18, nullable=false, unique=true,
        columnDefinition="char(18)")
    public String productIdnf;
    
    @Column(name="description", nullable=false)
    public String description;

    @ManyToOne
	@JoinColumnsOrFormulas(
	{ 
		@JoinColumnOrFormula(formula=@JoinFormula(value="SUBSTR(product_idnf, 1, 3)", 
				referencedColumnName="product_idnf"))
	})
    @Fetch(FetchMode.JOIN)
    private Product productFamily;
    
    public Product getProductFamily()
    {
        return productFamily;
    }
}

Hibernate generates the following SQL:
select
        product0_.id as id9_1_,
        product0_.description as descript2_9_1_,
        product0_.product_idnf as product3_9_1_,
        SUBSTR(product0_.product_idnf,
        1,
        3) as formula13_1_,
        product1_.id as id9_0_,
        product1_.description as descript2_9_0_,
        product1_.product_idnf as product3_9_0_,
        SUBSTR(product1_.product_idnf,
        1,
        3) as formula13_0_ 
    from
        product product0_ 
    left outer join
        product product1_ 
            on SUBSTR(product0_.product_idnf,
        1,
        3)=product1_.id 
    where
        product0_.id=?

The test case still fails for me - I am testing against HSQL database, and invoking the SUBSTR function within the join condition does not seem to work, but MAY work with your database...which one are you using?

I get the error:
01:40:47,246  WARN JDBCExceptionReporter:100 - SQL Error: -64, SQLState: 37000
01:40:47,247 ERROR JDBCExceptionReporter:101 - not allowed in OUTER JOIN condition 





> @ManyToOne not working with @Formula
> ------------------------------------
>
>                 Key: HHH-5041
>                 URL: http://opensource.atlassian.com/projects/hibernate/browse/HHH-5041
>             Project: Hibernate Core
>          Issue Type: Bug
>          Components: annotations
>    Affects Versions: 3.5.0-CR-2
>            Reporter: Chris Wilson
>         Attachments: HibernateAnnotationJoinOnFormulaTest.java
>
>
> HHH-4382 was marked as resolved fixed in 3.5. However, I cannot find the fix, and it appears still to be broken for me.
> The attached test case fails with 3.5.0-CR-2 just as it did with 3.3.2. It seems to ignore the @Formula annotation and simply create a productFamily column, which is of course empty.
> If I am doing something wrong, please could you tell me what it is, so that I can fix my code?

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