RE: RE: Function Based Index - Not Used ???

Didn't look for the explain plan in detail but you mentioned that the select returns around 50 rows. that confused us into thinking for other factors!

Since more than 10% records are getting selected, optimizer is most likely to choos FTS since it has to go back to the table and read the column "AGE" whose value cannot not be found from the index.

Regards
Naveen

> -----Original Message-----
> From: Prem Khanna J [mailto:jprem_at_kssnet.co.jp]
> Sent: Friday, May 30, 2003 8:45 AM
> To: Multiple recipients of list ORACLE-L
> Subject: Re: RE: Function Based Index - Not Used ???
>
>
> John,
>
> I tried it with COMPATIBLE=8.1.6.
> no nulls in that particular column
> but it's the same again.
>
> As Tim pointed out,
> CARD=262146 --> as per the EXPLAIN PLAN for SELECT w/o HINT.
> the SELECT retuens about 2.5 million rows.
> which is why it goes for a FTS than a Index scan
> is my understanding correct ?
>
> Thanks a lot John.
>
> Jp.
>
>
>
> 2003/05/29 21:45:44, "Hallas, John, Tech Dev"
> <John.Hallas_at_gb.vodafone.co.uk>
> wrote:
> >Naveen , these parameters look to be already set
> >Doesn't FBI come in with 8.1.7 and Prem is on 8.16 and a
> comapatible of 8.10 is
> in place
> >Failing that, as my second guess, 2 privileges need to be
> assigned to the user
> (QUERY_REWRITE and CREATE INDEX). The 2nd one is obviously in
> place to allow the
> index to be created but I don't know about the first
> >The final point is whether the name column is not null ,
> again I assume not but
> it is a possibility
> >John
>
>
> --
> Please see the official ORACLE-L FAQ: http://www.orafaq.net
> --
> Author: Prem Khanna J
> INET: jprem_at_kssnet.co.jp
>
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  INET: naveen_nahata_at_mindtree.com

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