JDOQL query for none empty

[JohanDoornenbal]

 Anybody knows if it is possible to query for none_empty values with JDOQL?


            @javax.jdo.annotations.Query(

                    name = "allDemandProfiles", language = "JDOQL",

                    value = "SELECT "

                            + "FROM info.matchingservice.dom.Profile.Profile "

                            + "WHERE demandProfileOwner != Null")  

        Does not work...