+ " where (gr.lastUsage = null or gr.lastUsage < :lastUsage)"
+ " and gr.type = :type ";
DBQuery dbq = DBFactory.getInstance().createQuery(query);
dbq.setDate("lastUsage", lastUsageLimit.getTime());
dbq.setString("type", BusinessGroup.TYPE_BUDDYGROUP);
List groups = dbq.list();
// 2. get all businness-groups in deletion-process (email send)
query = "select gr from org.olat.group.BusinessGroupImpl as gr"
+ " , org.olat.commons.lifecycle.LifeCycleEntry as le"
+ " where gr.key = le.persistentRef "
+ " and le.persistentTypeName ='org.olat.group.BusinessGroupImpl'"