Re: Atomic operations?

On Tue, Mar 18, 2008 at 10:17 AM, Dave Cramer <pg(at)fastcrypt(dot)com> wrote:
> >> On 18-Mar-08, at 9:40 AM, Paul Tomblin wrote:
> >>> I'm doing a simple delete/insert on a table, rather than trying to
> >>> figure out whether the row exists or not and then doing an update or
> >>> an insert. But what I'm discovering is that every now and then I

> >> Can't you just check the return value from the delete to see if
> >> anything was deleted ?
> >
> > I'm not sure how that would help. If I do the delete and it didn't
> > delete anything, that doesn't tell me if some other process inserted
> > it in the meantime.
> >
> which ever process succeeds in deleting should do the insert.

Doesn't help in the case where the record wasn't in there in the first place.

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