diff --git a/integration_tests/inputs/tracks1_ex.dl b/integration_tests/inputs/tracks1_ex.dl
new file mode 100644
index 00000000..b706d4b0
--- /dev/null
+++ b/integration_tests/inputs/tracks1_ex.dl
@@ -0,0 +1,21 @@
+source tracks('TRACK':string,'DATE':int,'RATING':int,'ALBUM':string).
+source albums('ALBUM':string,'QUANTITY':int).
+view tracks1('TRACK':string,'DATE':int,'RATING':int,'ALBUM':string,'QUANTITY':int).
+
+% constraints:
+
+⊥ :- tracks1(T,D,R,A,_), tracks1(_,_,_,A,Q), not tracks1(T,D,R,A,Q).
+
+% view definition:
+tracks1(T,D,R,A,Q) :- tracks(T,D,R,A), albums(A,Q).
+
+% caculate delta relation of tracks for the modification in the view
++tracks(TRACK,DATE,RATING,ALBUM) :- tracks1(TRACK,DATE,RATING,ALBUM,_), not tracks(TRACK,DATE,RATING,ALBUM).
+-tracks(TRACK,DATE,RATING,ALBUM) :- tracks(TRACK,DATE,RATING,ALBUM),not tracks1(TRACK,DATE,RATING,ALBUM,_), albums(ALBUM,_).
+-tracks(TRACK,DATE,RATING,ALBUM) :- tracks(TRACK,DATE,RATING,ALBUM),not tracks1(TRACK,DATE,RATING,ALBUM,_), tracks1(_,_,_,ALBUM,_).
+
+% caculate delta relation of albums for the modification in the view
++albums(ALBUM, QUANTITY) :- tracks1(_,_,_,ALBUM,QUANTITY), not albums(ALBUM,QUANTITY).
+-albums(ALBUM, QUANTITY) :- albums(ALBUM,QUANTITY), not tracks1(_,_,_,ALBUM,QUANTITY), tracks(TRACK,DATE,RATING,ALBUM), not -tracks(TRACK,DATE,RATING,ALBUM).
+-albums(ALBUM, QUANTITY) :- albums(ALBUM,QUANTITY), not tracks1(_,_,_,ALBUM,QUANTITY), +tracks(TRACK,DATE,RATING,ALBUM), not -tracks(TRACK,DATE,RATING,ALBUM).
+-albums(ALBUM, QUANTITY) :- albums(ALBUM,QUANTITY), not tracks1(_,_,_,ALBUM,QUANTITY), tracks1(_,_,_,ALBUM,_), not -tracks(_,_,_,ALBUM).
diff --git a/src/main.ml b/src/main.ml
index 1e907296..975085a5 100644
--- a/src/main.ml
+++ b/src/main.ml
@@ -390,10 +390,21 @@ let main () =
     if (!verification) then print_endline @@ "-- Program is validated --";
     let oc =if !outputf = "" then stdout else open_out !outputf  in
     if (not has_get) then fprintf oc "\n/*view definition (get):\n%s*/\n\n" view_rules_string;
+(*
     let sql = Ast2sql.unfold_view_sql (!dbschema) (!log) ast2 in
     fprintf oc "%s\n" sql;
     let trigger_sql = Ast2sql.unfold_delta_trigger_stt (!dbschema) (!log) (!dejima_ud) shell_script (!dejima_user) (!inc) (!optimize) (constraint2rule ast2) in
     fprintf oc "%s\n" trigger_sql;
+*)
+    let sql =
+      match Ast2sql.convert_expr_to_operation_based_sql ast2 with
+      | Error e ->
+          failwith (Ast2sql.show_error e)
+      | Ok sql_operations ->
+          sql_operations |> List.map Ast2sql.stringify_sql_operation |> String.concat "\n"
+    in
+    let trigger_sql = "" in
+    fprintf oc "%s" sql;
 
     if (!connectdb) then
       let c = new connection ~conninfo () in