Re: index full scan over an index fast full scan in an analytic function?

i cant attach the 10053 trace. it has proprietary info. There isnt much in analytic explain plan either.

does anyone know in general why a full scan would be faster than a fast full scan?
>
> From: <rgaffuri_at_cox.net>
> Date: 2003/10/23 Thu PM 03:09:26 EDT
> To: Multiple recipients of list ORACLE-L <ORACLE-L_at_fatcity.com>
> Subject: index full scan over an index fast full scan in an analytic function?
>
> I have an index on the two columns used in this query. Why would the optimizer choose an index full scan over an index fast full scan?
>
> My question isnt why an index is used, but the type of index scan?
>
> select *
> from (select col1, col2,
> dense_rank()
> over (partition by col1
> order by col2 desc)tab
> from mytable)
> where tab = 1
>
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> Author: <rgaffuri_at_cox.net
> INET: rgaffuri_at_cox.net
>
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