I noticed in the doc that OpenJPA doesn't support storing or retrieving the timezone value, just the Date portion, even for a TIMESTAMPTZ column (although it doesn't mention that last part).
The doc for EclipseLink says something similar, but it simply says that you have to use "native SQL" in order to get/set the timezone with Calendar. I can't imagine any reason why native queries in EclipseLink would be able to do this, but native queries in OpenJPA couldn't. Is there a good reason why a statement to this effect didn't make it into the OpenJPA doc (besides "we didn't think of it")?
