Will it cause error if I add more columns in table "users"?

Please, I need your answer

I want to add one column for table "users" (order_count), I will use trigger to update this column when there's a new order placed.

But I am not sure if I add more column for table "users", will the app have error? (I don't change any source code)

I am very thankful to your answer!

JusanSG no it will not cause any issues if you add new column to users table. You can proceed with that.