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

[Salvatore Insalaco (JIRA)]

TypeMismatchException on object equality expression from one-to-one relationship
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         Key: HHH-2088
         URL: http://opensource.atlassian.com/projects/hibernate/browse/HHH-2088
     Project: Hibernate3
        Type: Bug

  Components: core  
    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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