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Home -> Community -> Usenet -> c.d.o.server -> Re: reading sequence.CURRVAL
Bill Dietrich wrote:
> I'm using Oracle 7.3..3, and I want my app to check every now and then
>
> to see if new records have been added to a table (without using
> triggers).
>
> What I'd like to do is just read sequence.CURRVAL, where
> this is a sequence that generates record IDs for the table. If
> CURRVAL
> has
> increased since the last time I read it, I know there are new records,
>
> and what range their IDs are in.
>
> But the documentation says "Note that before you use CURRVAL
> for a sequence in your session, you must first initialize
> the sequence with NEXTVAL." And it is true; I've tested it.
>
> This means that I can't just read CURRVAL; first I have to
> reference NEXTVAL, which increments the value ! I don't want
> to do this.
>
> Is there any other way to read CURRVAL without changing its value ?
>
I think, you can read the next value of a cached sequence from thev$_sequences view
> I can't believe sequences have this behavior !
>
> Bill Dietrich
> bill_dietrich_at_wayfarer.com
--
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Organisation und Management von Informationssystemen
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