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----- Original Message -----From: RyanSent: Monday, January 26, 2004 9:24 PMSubject: When does Oracle use 'Index Fast Scan'I have found that the vast majority of time that Oracle chooses this method, my statistics are stale and the query is sub-optimal. One time, Oracle changed from a 'range scan' to this type of scan with a FIRST_ROWS hint and this reduced performance.This is just a full scan of the index, one block at a time right? When would this ever be superior to a Fast Full Scan or a Range Scan?
-- Please see the official ORACLE-L FAQ: http://www.orafaq.net -- Author: Ryan INET: ryan.gaffuri_at_cox.net 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: ListGuru_at_fatcity.com (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).Received on Mon Jan 26 2004 - 21:19:26 CST