The cartesian merge join in the last two plans is interesting feature. It's the sort of thing you associate with very small tables - not tables which look as if they might be returning large volumes of data.
Regards Jonathan Lewis http://www.jlcomp.demon.co.uk Coming soon one-day tutorials: Cost Based Optimisation Trouble-shooting and Tuning Indexing Strategies (see http://www.jlcomp.demon.co.uk/tutorial.html ) ____UK_______March 19th ____USA_(FL)_May 2nd Next Seminar dates: (see http://www.jlcomp.demon.co.uk/seminar.html ) ____USA_(CA, TX)_August The Co-operative Oracle Users' FAQ http://www.jlcomp.demon.co.uk/faq/ind_faq.html -----Original Message----- To: Multiple recipients of list ORACLE-L <[EMAIL PROTECTED]> Date: 17 February 2003 05:51 hint > >Here's one bad SQL I am working on right now. >Even the execution plan changes with a different SORT_AREA_SIZE ! > >9.2.0.2 on Tru64 : > >Query Plan >--------------------------------------------------------------------- ------ >SELECT STATEMENT Cost = 179625268 > SORT UNIQUE > HASH JOIN > TABLE ACCESS FULL RECIPE > HASH JOIN > TABLE ACCESS FULL PRCD > HASH JOIN > TABLE ACCESS FULL PRCD_INSTRUCTION_RUNSHEET > MERGE JOIN CARTESIAN > HASH JOIN > TABLE ACCESS FULL PART > TABLE ACCESS FULL PRCD_INSTRUCTION > BUFFER SORT > TABLE ACCESS FULL STAGE > -- Please see the official ORACLE-L FAQ: http://www.orafaq.net -- Author: Jonathan Lewis 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).
