diff --git a/kernel/av/av.go b/kernel/av/av.go
index 87b13b67e..e1d6c0c37 100644
--- a/kernel/av/av.go
+++ b/kernel/av/av.go
@@ -263,7 +263,7 @@ type Viewable interface {
 func NewAttributeView(id string) (ret *AttributeView) {
 	view, blockKey, selectKey := NewTableViewWithBlockKey(ast.NewNodeID())
 	ret = &AttributeView{
-		Spec:      0,
+		Spec:      2,
 		ID:        id,
 		KeyValues: []*KeyValues{{Key: blockKey}, {Key: selectKey}},
 		ViewID:    view.ID,