RE: SQL Operation and Row size

> -----Original Message-----
> From: Stephane Faroult [mailto:sfaroult_at_oriole.com]
> Sent: Thursday, 16 October 2003 07:14
> To: Multiple recipients of list ORACLE-L
> Subject: Re: SQL Operation and Row size
>
>
> Daniel Fink wrote:
> >
> > When retrieving data, does Oracle place just the columns of
> > interest into the result set or does it place the entire row in
> > the result set (and filter out the columns of interest later)?
> >
>
> I'd say just the columns of interest. Can be checked by looking at the
> number of buffer gets on a table with some noticeable chaining,
> comparing select * to select pkcol.

Following on from this, I've always been curious where result sets that include computed or literal values get stored. It's not possible to cache the block of something that was never in a block to begin with (though I'm willing to be corrected on that :-)). Would it be a temp segment created for just the computed/literal values; temp segments for the whole result set; somewhere in UGA/PGA; or somewhere else entirely? Any light shed on this would satisfy my curiosity.

Ciao
Fuzzy
:-)

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