Kevin,
You might want to check out bug 1540560 "ANALYZE TABLE
ESTIMATE STATISTICS NOT ROUNDING VALUE FOR NUM_ROWS"
closed as "not a bug."
Are you saying that the CBO produces a different
explain plan for a table with NUM_ROWS = 5000000.25
vs. NUM_ROWS= 5000000? This would definitely be a bug
and should be fairly easy to reproduce since one can
use DBMS_STATS to set a specific value.
HTH,
-- Anita
--- "Toepke, Kevin M" <[EMAIL PROTECTED]> wrote:
> That's what the doc says. However, at least with
> Oracle 8.0.5 through
> 8.1.7.2.0 on Solaris, if you do not explictily
> compute statistics, the
> NUM_ROWS column in DBA_TABLES and DBA_INDEXES has a
> decimal value. (yup the
> table has 32.345 rows in it.)
>
> This may not seem like a big deal until you try to
> tune the queries that
> reference these tables/indexes. Man, do the
> exectution plans get screwed up
> (how about a FTS against a 5million row table in a
> nested-loops operation!)
>
> I've submitted a TAR on this and am "working with"
> Oracle support.
>
> Kevin
>
> -----Original Message-----
> Sent: Wednesday, June 13, 2001 1:41 PM
> To: Multiple recipients of list ORACLE-L
>
>
> On Tuesday 12 June 2001 15:05, Kevin Kostyszyn
> wrote:
> > Couldn't you try and estimate about 50% of it?
> It's not as reliable, but
> > it would probably work.
>
> Actually, Oracle will do a 'compute statistics' when
> you attempt to do
> an 'estimate statistics' on 50% or more.
>
> Jared
> --
> --
> Please see the official ORACLE-L FAQ:
> http://www.orafaq.com
> --
> Author: Toepke, Kevin M
> INET: [EMAIL PROTECTED]
>
> Fat City Network Services -- (858) 538-5051 FAX:
> (858) 538-5051
> San Diego, California -- Public Internet
> access / Mailing Lists
>
--------------------------------------------------------------------
> To REMOVE yourself from this mailing list, send an
> E-Mail message
> to: [EMAIL PROTECTED] (note EXACT spelling of
> 'ListGuru') and in
> the message BODY, include a line containing: UNSUB
> ORACLE-L
> (or the name of mailing list you want to be removed
> from). You may
> also send the HELP command for other information
> (like subscribing).
__________________________________________________
Do You Yahoo!?
Spot the hottest trends in music, movies, and more.
http://buzz.yahoo.com/
--
Please see the official ORACLE-L FAQ: http://www.orafaq.com
--
Author: A. Bardeen
INET: [EMAIL PROTECTED]
Fat City Network Services -- (858) 538-5051 FAX: (858) 538-5051
San Diego, California -- Public Internet access / Mailing Lists
--------------------------------------------------------------------
To REMOVE yourself from this mailing list, send an E-Mail message
to: [EMAIL PROTECTED] (note EXACT spelling of 'ListGuru') and in
the message BODY, include a line containing: UNSUB ORACLE-L
(or the name of mailing list you want to be removed from). You may
also send the HELP command for other information (like subscribing).
