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

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 Assignee: Gail Badner Fix For: 3.3.x, 3.5.0.Next Attachments: HHH-2088.patch 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.