Re: When does Oracle use 'Index Full Scan'

----- Original Message -----

From: Ryan

To: Multiple recipients of list ORACLE-L

Sent: Monday, January 26, 2004 9:24 PM

Subject: 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?

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Author: Ryan
  INET: ryan.gaffuri_at_cox.net

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