Having an entity with a versioned column and changing some properties of the entity while it is attached to a session automatically invokes an update on commit, even if there was no call to session.update() or persist().

I was wondering why my version column values increased much and why validation occured for just reading data (and changing properties for invoker). Especially in an CMT environment where session/transaction will be automatically closed/commited.

Marking a version column with:

<version name="version" type="java.lang.Long"/>
<property name="foo"/>

    Session session = sessinFactory.openSession();
    Transaction tr = session.beginTransaction();

    Entity entity = session.get(Entity.class, 1);
    
    entity.setFoo("foo");

    tr.commit();
    session.close(); // here SQL - update takes place