[hibernate-issues] [Hibernate-JIRA] Updated: (HHH-5811) flush causes update query on field of type Byte[]

[K C (JIRA)]

     [ http://opensource.atlassian.com/projects/hibernate/browse/HHH-5811?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

K C updated HHH-5811:
---------------------

    Attachment: hhh-5811.zip

added test case

> flush causes update query on field of type Byte[]
> -------------------------------------------------
>
>                 Key: HHH-5811
>                 URL: http://opensource.atlassian.com/projects/hibernate/browse/HHH-5811
>             Project: Hibernate Core
>          Issue Type: Bug
>          Components: entity-manager
>    Affects Versions: 3.6.0
>         Environment: Hibernate 3.6.0.Final, Oracle 11g
>            Reporter: K C
>         Attachments: hhh-5811.zip
>
>
> I have a field that is mapped as follows:
>     @Lob
>     @Column(name = "picture")
>     private Byte[] picture;
> When retrieving the entity with a regular session.load() or criteria.list(), upon session flush, an update statement is issued for the field. 
> In an interceptor, I can see in the onFlushDirty method that the byte arrays in the currentState en previousState parameters are different objects, but with the same byte-content. All the other objects in currentState and previousState are identical.
> My guess is that this causes Hibernate to think the contents of the field changed?
> This behavior did not happen in 3.5.5-Final, and because the entity is versioned, upon each retrieval, the version field is incremented, which is highly undesirable.

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