my understanding is that an IOT uses a Logical Rowid called a urowid. When changes are made to the IOT, the row can change. The rowid may no longer be accurate. So Oracle 'guesses' where its located. I believe its in the documentation. > > From: Jared Still <jkstill@xxxxxxxxxx> > Date: 2004/04/28 Wed PM 01:50:47 EDT > To: Oracle-L Freelists <oracle-l@xxxxxxxxxxxxx> > Subject: Re: RE: Index-Organized Table experiences > ---------------------------------------------------------------- Please see the official ORACLE-L FAQ: http://www.orafaq.com ---------------------------------------------------------------- To unsubscribe send email to: oracle-l-request@xxxxxxxxxxxxx put 'unsubscribe' in the subject line. -- Archives are at //www.freelists.org/archives/oracle-l/ FAQ is at //www.freelists.org/help/fom-serve/cache/1.html -----------------------------------------------------------------