Re: [Q] does outer join cause full table scan?
- From: Stephane Faroult <sfaroult@xxxxxxxxxx>
- To: oracle-l@xxxxxxxxxxxxx
- Date: Tue, 30 Mar 2004 20:42:20 +0200
dba1 mcc wrote:
>
> We have sql statement outer join two tables. The join
> columns have index on it. I use "tkprof" to check it
> and it show full table scan.
>
> Does outer join cause 'full table scan"?
>
> Thanks.
>
Nothing causes something 'per se' with the CBO. What may matter is
whether the column you are outjoining on (ugly expression) is nullable
or not.
--
Regards,
Stephane Faroult
Oriole Software
----------------------------------------------------------------
Please see the official ORACLE-L FAQ: http://www.orafaq.com
----------------------------------------------------------------
To unsubscribe send email to: oracle-l-request@xxxxxxxxxxxxx
put 'unsubscribe' in the subject line.
--
Archives are at //www.freelists.org/archives/oracle-l/
FAQ is at //www.freelists.org/help/fom-serve/cache/1.html
-----------------------------------------------------------------
Other related posts:
