Hello,

From the doc it's unclear how to figure out which field got changed in revision. On database level it's quite straightforward (after enabling org.hibernate.envers.global_with_modified_flag), but there doesn't seem to be an API which answers this question.
http://docs.jboss.org/hibernate/core/4. ... es-queries - this one suggests going in the loop over all existing fields/properties and asking "hasChanged". Seems very inefficient to me.

Or I'm missing something obvious?

WBR

Unfortunately out of the box, there isn't an API specifically for that, but there is a JIRA issue (https://hibernate.atlassian.net/browse/HHH-8058) to enable such support.

What I believe we need is an API that allows specifying the entity type and primary key along with a range of revisions, either provided as a collection or a start/end revision specifying a range. The API would return a difference/changes object that enables obtaining the revised property names and values between all the provided revision numbers.

Otherwise, query cache may be helpful here to minimize any type of performance concerns in the short-term.