Refresh fix: do not refresh not-persisted objects

Former-commit-id: d02a6471

plugins/org.jkiss.dbeaver.model/src/org/jkiss/dbeaver/model/navigator/DBNDatabaseNode.java

@@ -302,6 +302,7 @@ public abstract class DBNDatabaseNode extends DBNNode implements DBSWrapper, DBP
         }
         DBSObject object = getObject();
         if (object instanceof DBPRefreshableObject) {
+            if (object.isPersisted()) {
                 DBSObject newObject = ((DBPRefreshableObject) object).refreshObject(monitor);
                 if (newObject == null) {
                     if (parentNode instanceof DBNDatabaseNode) {
@@ -312,6 +313,10 @@ public abstract class DBNDatabaseNode extends DBNNode implements DBSWrapper, DBP
                     refreshNodeContent(monitor, newObject, source);
                     return this;
                 }
+            } else {
+                // Not persisted node - nothing to refresh
+                return this;
+            }
         } else {
             return super.refreshNode(monitor, source);
         }