Problem with ManyToOne to a unique key on merge when old value is null ---------------------------------------------------------------------- Key: HHH-5677 URL: http://opensource.atlassian.com/projects/hibernate/browse/HHH-5677 Project: Hibernate Core Issue Type: Bug Components: annotations Affects Versions: 3.6.0 Reporter: Marcial Atienzar *Entity 1*: {code} @ManyToOne(fetch=FetchType.LAZY,cascade=CascadeType.REFRESH) @JoinColumn(name = "UPC", referencedColumnName = "CLAVE_PRO",unique=false,insertable=false,updatable=false) private RhDatosPersonales upcRrhh; {code} *Entity 2*: {code} @Id @Column(name = "NUM", nullable = false) private BigDecimal num; @Column(name = "CLAVE_PRO",unique=true,insertable=false,updatable=false,nullable=true) private Long clavePro; {code} *Exception* {code} Caused by: java.lang.ClassCastException: org.kyrian.entity.rrhh.RhDatosPersonales cannot be cast to java.math.BigDecimal at org.hibernate.type.descriptor.java.BigDecimalTypeDescriptor.areEqual(BigDecimalTypeDescriptor.java:36) at org.hibernate.type.AbstractStandardBasicType.isEqual(AbstractStandardBasicType.java:183) at org.hibernate.type.AbstractStandardBasicType.isSame(AbstractStandardBasicType.java:168) at org.hibernate.type.AbstractStandardBasicType.isDirty(AbstractStandardBasicType.java:213) at org.hibernate.type.AbstractStandardBasicType.isDirty(AbstractStandardBasicType.java:205) at org.hibernate.type.ManyToOneType.isDirty(ManyToOneType.java:268) at org.hibernate.type.ManyToOneType.isDirty(ManyToOneType.java:277) at org.hibernate.type.TypeHelper.findDirty(TypeHelper.java:296) at org.hibernate.persister.entity.AbstractEntityPersister.findDirty(AbstractEntityPersister.java:3378) at org.hibernate.event.def.DefaultFlushEntityEventListener.dirtyCheck(DefaultFlushEntityEventListener.java:520) at org.hibernate.event.def.DefaultFlushEntityEventListener.isUpdateNecessary(DefaultFlushEntityEventListener.java:230) at org.hibernate.event.def.DefaultFlushEntityEventListener.onFlushEntity(DefaultFlushEntityEventListener.java:154) at org.hibernate.event.def.AbstractFlushingEventListener.flushEntities(AbstractFlushingEventListener.java:219) at org.hibernate.event.def.AbstractFlushingEventListener.flushEverythingToExecutions(AbstractFlushingEventListener.java:99) at org.hibernate.event.def.DefaultFlushEventListener.onFlush(DefaultFlushEventListener.java:50) at org.hibernate.impl.SessionImpl.flush(SessionImpl.java:1216) at org.hibernate.impl.SessionImpl.managedFlush(SessionImpl.java:383) at org.hibernate.transaction.synchronization.CallbackCoordinator.beforeCompletion(CallbackCoordinator.java:117) {code} -- This message is automatically generated by JIRA. - If you think it was sent incorrectly contact one of the administrators: http://opensource.atlassian.com/projects/hibernate/secure/Administrators.... - For more information on JIRA, see: http://www.atlassian.com/software/jira