Actually, ROWNUM has nothing to do with extents/segments/inserts/updates/deletes. It is all about access paths. The solution posted makes sense as ROWNUM can be affected by many subsequent operations.
-----Original Message----- Sent: Thursday, August 29, 2002 11:04 AM To: Multiple recipients of list ORACLE-L Holes in your extents/segments. Normal. You get this after repeated updates/deletes/inserts. ltiu Paul Baumgartel wrote: >I've been given a query to investigate. The performance varies >extremely depending on whether the entire result set is fetched or a >ROWNUM < n clause is attached; that makes sense to me. What doesn't >make sense is the following: if we add WHERE ROWNUM < 50, the query >returns 24 rows. If we add WHERE ROWNUM < 1000, the query returns 336 >rows! > >I don't know the size of the entire result set (I'm running a count >right now), but if the result set consists of at least 336 rows, >shouldn't WHERE ROWNUM < 50 return 49 rows? > >TIA! > > > >===== >Paul Baumgartel, Adept Computer Associates, Inc. >[EMAIL PROTECTED] > > > > > >__________________________________________________ >Do You Yahoo!? >Yahoo! Finance - Get real-time stock quotes >http://finance.yahoo.com > > -- Please see the official ORACLE-L FAQ: http://www.orafaq.com -- Author: ltiu INET: [EMAIL PROTECTED] Fat City Network Services -- (858) 538-5051 FAX: (858) 538-5051 San Diego, California -- Public Internet access / Mailing Lists -------------------------------------------------------------------- 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). -- Please see the official ORACLE-L FAQ: http://www.orafaq.com -- Author: Fink, Dan INET: [EMAIL PROTECTED] Fat City Network Services -- (858) 538-5051 FAX: (858) 538-5051 San Diego, California -- Public Internet access / Mailing Lists -------------------------------------------------------------------- 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).
