Hello, I think that Chapter 12.1.2 in the Manual will help here.
"When attaching null fields in these cases, OpenJPA cannot distinguish between a field that was unloaded and one that was intentionally set to null. In this case, OpenJPA will use the current detach state setting to determine how to handle null fields: fields that would have been included in the detached state are treated as loaded, and will in turn set the corresponding attached field to null." Regards, John > -----Original Message----- > From: Tibebu, Nebiyou [USA] [mailto:tibebu_nebi...@bah.com] > Sent: Friday, June 14, 2013 5:26 AM > To: users@openjpa.apache.org > Subject: RE: [External] Re: OpenJPA Null Update > > Rick, > > Thank you for your help. Here is the scenario: > > 1. Get a persistent instance of an entity 2. Detach entity 3. Update values on > the entity with non-null values 4. One of these values will be a string value > with existing non-trivial data 5. Set the value on this field to null 6. Merge > entity 7. All other fields are updated except this value. > > Nebiyou Tibebu > ________________ > Booz | Allen | Hamilton > 8283 Greensboro Dr, Mclean, VA 22102 > tibebu_nebi...@bah.com > ________________________________________ > From: Rick Curtis [curti...@gmail.com] > Sent: Thursday, June 13, 2013 10:31 PM > To: users@openjpa.apache.org > Subject: RE: [External] Re: OpenJPA Null Update > > Well, you are going to have to describe what your scenario is for any of us to > help you out. > On Jun 13, 2013 6:57 PM, "Tibebu, Nebiyou [USA]" > <tibebu_nebi...@bah.com> > wrote: > > > I am not getting any errors. It is just being ignored. > > > > Nebiyou Tibebu > > ________________ > > Booz | Allen | Hamilton > > 8283 Greensboro Dr, Mclean, VA 22102 > > tibebu_nebi...@bah.com > > ________________________________________ > > From: Tibebu, Nebiyou [USA] > > Sent: Thursday, June 13, 2013 5:55 PM > > To: users@openjpa.apache.org > > Subject: RE: [External] Re: OpenJPA Null Update > > > > Nebiyou Tibebu > > ________________ > > Booz | Allen | Hamilton > > 8283 Greensboro Dr, Mclean, VA 22102 > > tibebu_nebi...@bah.com > > ________________________________________ > > From: Rick Curtis [curti...@gmail.com] > > Sent: Thursday, June 13, 2013 5:12 PM > > To: users > > Subject: [External] Re: OpenJPA Null Update > > > > Are you getting an error or something... or is it just being ignored? > > If it is being ignored, can you better describe the scenario that > > you're running? > > > > > > On Thu, Jun 13, 2013 at 3:00 PM, Tibebu, Nebiyou [USA] < > > tibebu_nebi...@bah.com<mailto:tibebu_nebi...@bah.com>> wrote: > > I am unable to update Nullable VARCHAR columns in Mainframe DB2 to > NULL. > > Update to other values, including an empty string works fine. I would > > appreciate some assistance. This is in version 2.2.1. > > > > Nebiyou Tibebu > > Senior Consultant > > 13200 Woodland Park Rd, > > Herndon, VA 21071 > > Email: tibebu_nebi...@bah.com<mailto:tibebu_nebi...@bah.com> > > Tel: (703) 377-5425<tel:%28703%29%20377-5425> > > Cell: (571) 422-5178<tel:%28571%29%20422-5178> > > > > > [http://www.soaschool.com/system/application/images/soacp_architect.jp > > g] > > > > Booz Allen Hamilton | > > http://www.boozallen.com<http://www.boozallen.com/ > > > > > > > > > > > > > > > -- > > Rick Curtis > >
