I've just moved jbpm 4.3 application form my test environment on MySQL to customer's test server which storing data in Oracle 9i. I process I'm using process variables and test them in decision nodes, eg. is there is something take one path, otherwise take different one.
Problem is that when I store empty string variable in the database is physically stored null. When I try to read it back in EL I get error that variable has not been found.
I have found thread discussing handling null values in EL, but this is slightly different case. If I store "" I want to get "" back.
This should be completely transparent for the jbpm engine.
Am I missing some configuration in hibernate? I don't want to use solution that I would store some fake value instead of empty string e.g. "$$this_is_really_empty" :^0 .
Martin