Re: why do you apply undo before redo?

From: Ryan <>
Date: Mon, 19 Apr 2004 20:24:39 -0400
Message-ID: <87_gc.5258$uF3.4934_at_lakeread04>

I still do not understand why its better to do undo before redo. I do not see how you can have an inconsistent state the other way. I know Oracle does it that way.

I'm at a loss for the theory. Does anyone know more? "Jan Hidders" <> wrote in message news:EJXgc.78458$
> Ryan wrote:
> > "Jan Hidders" <> wrote in message
> > news:HFDgc.77172$
> >>
> >>No, I'm not. In the example the transaction in the UNDO list did not yet
> >>commit, and the transaction in the REDO list did. Does the book not
> >>explain what the REDO and the UNDO list are and how they are
> >
> >
> > I know what undo and redo are. How is it possible to commit redo and not
> > undo?
> With "did not yet commit" I meant "did not yet commit before the crash".
> -- Jan Hidders
Received on Tue Apr 20 2004 - 02:24:39 CEST

Original text of this message