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That's because JPA isn't involved here. It's directly using hibernate api's and not sticking to the standard which is what I was talking about.

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I'm almost certain this occurs with Hibernate as the JPA provider. I haven't tried this with other JPA providers but as far as I can tell from tutorials[1], stack overflow posts[2], and the JPA documentation[3], this is the default for JPA as well.

[1] - https://www.objectdb.com/java/jpa/persistence/update

[2] - https://stackoverflow.com/a/8307991

[3] - https://docs.oracle.com/javaee/6/tutorial/doc/bnbqw.html#bnb...

EDIT: Oops I accidentally replied to this twice

Have you verified that? I'm pretty sure that occurs using the JPA API and Hibernate. I'm not sure if other JPA providers do this as well.

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