Oliver Elphick wrote: > IF NEW.b = OLD.b OR (NEW.b IS NULL AND OLD.b IS NULL) THEN > -- b has not changed > ... > END IF; > > This doesn't cover case 3, since UPDATE ... SET b=b will lead to NEW.b=OLD.b
pgsql-performance by date:
Соглашаюсь с условиями обработки персональных данных