Re: [Q] does outer join cause full table scan?

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
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