we are not using views.
>
> From: "Juan Cachito Reyes Pacheco" <jreyes_at_dazasoftware.com>
> Date: 2004/03/16 Tue AM 10:24:20 EST
> To: <oracle-l_at_freelists.org>
> Subject: Re: cardinality in query plans?
>
> Hi, you are using views
> there is a hidden parameter to disable new cbo feature for view complexity,
> I think this will solve your problem, but I don't remember the name.
> ----- Original Message -----
> From: <ryan.gaffuri_at_cox.net>
> To: <oracle-l_at_freelists.org>
> Sent: Monday, March 15, 2004 9:50 AM
> Subject: cardinality in query plans?
>
>
> > I'm doing a two table join and both tables are analyzed. Oracle is
> incorrectly choosing a full tables scan over an index search(I tested it,
> index search has 1/4 the logical I/Os).
> >
> > When I see the cardinality for the full tablescan I see 262,000. However,
> when I do a count(*) of the table or check num_rows in dba_tables I see
> 870,000 records. I'm assuming this is why Oracle is choosing the full table
> scan.
> >
> > table is analyzed as follows:
> >
> > exec dbms_stats.gather_table_stats(cascade=>true).
> >
> > this interesting part is that when I use bind variables Oracle chooses the
> proper plan. Any ideas?
> >
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Received on Tue Mar 16 2004 - 09:35:05 CST
