Re: Why does this query need a table access by rowid?
- From: Tanel Põder <tanel.poder.003@xxxxxxx>
- To: <oracle-l@xxxxxxxxxxxxx>
- Date: Fri, 23 Jul 2004 21:20:20 +0300
> Since in the index you don't have the DOC_ID column, you have only the
> function of DOC_ID in your index and Oracle isn't smart enough to look
> inside the function to see whether the funcion leaves the value
unaltered...
>
> Try to do a composite index on f(doc_id), doc_id.
(I did hit send too early..)
Of course this kind of composite index would eliminate the benefit of having
smaller index, since all doc-ids would be stored in index anyway...
Tanel.
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