[hibernate-issues] [Hibernate-JIRA] Commented: (HHH-2088) TypeMismatchException on object equality expression from one-to-one relationship

[Gail Badner (JIRA)]

    [ http://opensource.atlassian.com/projects/hibernate/browse/HHH-2088?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=32496#action_32496 ] 

Gail Badner commented on HHH-2088:
----------------------------------

Please attach a runnable (Java + mapping) test case that reproduces this issue.

> TypeMismatchException on object equality expression from one-to-one relationship
> --------------------------------------------------------------------------------
>
>                 Key: HHH-2088
>                 URL: http://opensource.atlassian.com/projects/hibernate/browse/HHH-2088
>             Project: Hibernate Core
>          Issue Type: Bug
>          Components: core
>    Affects Versions: 3.2.0.cr4
>            Reporter: Salvatore Insalaco
>
> Suppose to have entity A with a one-to-one constrained relationship to an entity B, called bRel.
> The query: "from A a, B b where a.bRel = b" raises a TypeMismatchException, even if bRel and b are instances of the same entity.
> This happens because in BinaryLogicOperatorNode:
> - lhsType is org.hibernate.type.Type = org.hibernate.type.OneToOneType(B)", with getColumnSpan returning 0.
> - rhsType is org.hibernate.type.Type = org.hibernate.type.ManyToOneType(B)", with getColumnSpan returning 1.
> And it compares the two columnspans.
> It doesn't happen with 3.2.0.cr2.

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