Android database update by attaching databaes

I have an app that i want to update it database at next version by adding new values to it. the new data is in there temp database. This is may onUpgrade() method :

public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) {
        // version 2

        try{

            db.execSQL("ALTER TABLE tbl_questions ADD COLUMN q_fav BOOLEAN DEFAULT 0");
            db.execSQL("ALTER TABLE tbl_users ADD COLUMN user_voted BOOLEAN DEFAULT 0");
            db.execSQL("INSERT INTO tbl_categories (_id, cat_title) VALUES (3, '\u0639\u0645\u0648\u0645\u06CC (\u0639\u0644\u0648\u0645 \u0627\u0646\u0633\u0627\u0646\u06CC)')");
            db.execSQL("CREATE TABLE [tbl_schedule] (" +
                       "[_id] INTEGER PRIMARY KEY, " +
                       "[lesson_name] VARCHAR, " +
                       "[lesson_unit] VARCHAR, " +
                       "[teacher_name] VARCHAR, " +
                       "[exam_date] VARCHAR, " +
                       "[description] VARCHAR);");
            db.setTransactionSuccessful();
            db.endTransaction();
            db.execSQL("ATTACH DATABASE '/data/data/com.andrun.payamenoo/databases/db_temp.sqlite' AS SRC;");
            db.beginTransaction();
            db.execSQL("INSERT INTO MAIN.tbl_questions SELECT * FROM SRC.tbl_questions;");
            //db.execSQL("DETACH SRC;");
        }catch(Exception e){
            e.printStackTrace();
        }finally{
        }

        super.onUpgrade(db, oldVersion, newVersion);
    }

Four first work well. the problem is attaching query. code dose not throw any exception or any error but also dose not any effect to database and new data dose't add.

Pleas help