Личный кабинет
Укажите e-mail, на который будет выслан код восстановления пароля.
На указанный вами адрес e-mail был выслан код подтверждения аккаунта. Введите полученный код для продолжения:
Введите новый пароль два раза:
On Mon, Oct 26, 2015 at 10:19 AM, Amit Kapila <amit.kapila16@gmail.com> wrote:I think Oracle just copies the changed part of old row to rollback segment.Also in Redo logs, it just writes the changed column value (both old andnew). So for the case we are discussing in this thread (one changedcolumn out of 200 columns), Oracle will just write the old value of thatcolumn in Redo and then in rollback segment, and write the new valuein Redo and then do the in-place update in heap row.In that case, readers would pay the penalty for constructing the row.
I think Oracle just copies the changed part of old row to rollback segment.Also in Redo logs, it just writes the changed column value (both old andnew). So for the case we are discussing in this thread (one changedcolumn out of 200 columns), Oracle will just write the old value of thatcolumn in Redo and then in rollback segment, and write the new valuein Redo and then do the in-place update in heap row.
В списке pgsql-hackers по дате отправления: