Flush causes update query on field of type Byte
I have a field that is mapped as follows:
@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.
Hibernate 3.6.0.Final, Oracle 11g
Closing resolved issued in preparation for releasing 4.3.6.
Fixed in master and 4.3.
Thanks for the test case and patch!
Ok, I provided a patch...
Since a test was already created by Gail shortly after reporting this bug and marked with "FailureExpected", I simple had to remove said annotation and lo and behold: the test passes.
The fix is simple: add the descriptor-specific equals/hashcode functions to ByteArrayTypeDescriptor.java: it seems that they were already present in the 3 other classes for handling char, Character and byte lobs, but mysteriously missing from the affected class for handling Byte.
Can we please have this included in the next release?
Updated the test case: please remove upload hhh-5811.zip from today and the wrongly uploaded hhh-9257-updated.zip