> -----Original Message----- > From: Stephane Faroult [mailto:[EMAIL PROTECTED] > 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 :-) -- Please see the official ORACLE-L FAQ: http://www.orafaq.net -- Author: Grant Allen INET: [EMAIL PROTECTED] Fat City Network Services -- 858-538-5051 http://www.fatcity.com San Diego, California -- Mailing list and web hosting services --------------------------------------------------------------------- To REMOVE yourself from this mailing list, send an E-Mail message to: [EMAIL PROTECTED] (note EXACT spelling of 'ListGuru') and in the message BODY, include a line containing: UNSUB ORACLE-L (or the name of mailing list you want to be removed from). You may also send the HELP command for other information (like subscribing).
