Zeugswetter Andreas SB wrote:
>
> > > You mean it is restored in session that is running the transaction ?
>
> Depends on what you mean with restored. It first reads the heap page,
> sees that it needs an older version and thus reads it from the "rollback segment".
So are whole pages stored in rollback segments or just the modified data
?
Storing whole pages could be very wasteful for tables with small records
that
are often modified.
---------------
Hannu
