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Home -> Community -> Mailing Lists -> Oracle-L -> Re: Empty Table
Interesting. I hadn't considered that.
So, did you try your query with a NOPARALLEL hint?
Jared
On Mon, 24 Jan 2005 23:28:36 +0100, jaromir nemec <jaromir_at_db-nemec.com> wrote:
> Hi,
>
> > add a where clause:
> > WHERE rownum < 2;
>
> this is in nearly all cases a very good approach, but there is a small but
> dangerous trap.
>
> There is a constellation performing even with rownum < 2 a full scan of the
> total table. No, I don't mean the old joke with rownum > 2!
>
> This case (true story) is documented in
> http://www.db-nemec.com/Selecting_ROWNUM_1.html
>
> Regards
>
> Jaromir D.B. Nemec
>
> ----- Original Message -----
> From: "Jared Still" <jkstill_at_gmail.com>
> To: <andert_at_gmail.com>
> Cc: <jacintakean_at_yahoo.com>; <oracle-l_at_freelists.org>
> Sent: Monday, January 24, 2005 7:56 PM
> Subject: Re: Empty Table
>
>
-- Jared Still Certifiable Oracle DBA and Part Time Perl Evangelist -- http://www.freelists.org/webpage/oracle-lReceived on Mon Jan 24 2005 - 18:08:06 CST
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