Imported update chnage sale / regular price

Is not a bug, but a feature sugestion i’m think can be usefull and help me a lots:

If i’m set a Sale price manualy, generaly im set a Regular price manualy too.
But when i’m do an imported products update for all, i’m lost sale price and manualy entered regular price.

What i’m propose: if a Sale price is set, until new imported regular price is not bellow the sale price, the update not perform sale and regular price update in database.

If the new regular price is bellow the existing setted sale price, sale price is set to zero and regular price is updated as usual.

Like this we keep sale price promotion until it cause lost.