the advantage might be:
there are other columns in the table that should not be exposed to
the user querying the view
"Daniel Morgan" <damorgan_at_exesolutions.com> schrieb im Newsbeitrag
news:3CB726F3.7594C828_at_exesolutions.com...
> I would expect this to be a non-starter though it would never occur to me
> to try it.
>
> But a view being hit thousands of times a second? Why? Why not let them go
> directly to the tables. What is the advantage of a simple view to a
> read-only user?
>
> Daniel Morgan
>
>
>
> jim rowe wrote:
>
> > Hi,
> >
> > Suppose i have a simple view pointing to a simple table.
> >
> > CREATE VIEW my_view AS (select column_a from table_a);
> >
> > A high performance application is accessing this view thousands of
> > times a second. It must run 24 * 7. They are read-only accesses.
> >
> > I want to replace the view with the following command.
> >
> > CREATE OR REPLACE VIEW my_view AS (select column_b from table_b).
> >
> > When i run this command, does the view suffer any 'downtime' during
> > the changeover? Will the application be safely blocked from accessing
> > the view during the transition, or will some of its accesses to the
> > view fail?
> >
> > What about transactions in progress on the view during the transition.
> > Will they be allowed to complete, or will they fail?
> >
> > Thanks for your help,
> > Jim.
>
Received on Fri Apr 12 2002 - 17:43:26 CDT
