Lisa, This is my explain plan:
1.19 SELECT STATEMENT SQL1 Cost = 19 2.1 SORT GROUP BY 3.1 HASH JOIN 4.1 TABLE ACCESS FULL OPERS_CNTR_CDE 4.2 HASH JOIN 5.1 TABLE ACCESS FULL FEE_TYP 5.2 HASH JOIN 6.1 MERGE JOIN CARTESIAN 7.1 TABLE ACCESS FULL RECM 7.2 SORT JOIN 8.1 TABLE ACCESS FULL MDB_DEPT 6.2 TABLE ACCESS FULL CNCL_FEE The two dim tables in the Cartesian join step are very small - 2 and 3 records. The fact table - CNCL_FEE is about 4000 rows. Gene --- "Koivu, Lisa" <[EMAIL PROTECTED]> wrote: > Gene, what's the next step in the explain plan? Can > you post it? > Are the dimension tables small? > > Lisa Koivu > Oracle Database Tank. > Fairfield Resorts, Inc. > 954-935-4117 > > > > -----Original Message----- > > From: Gene Gurevich > [SMTP:[EMAIL PROTECTED]] > > Sent: Tuesday, March 26, 2002 4:26 PM > > To: Multiple recipients of list ORACLE-L > > Subject: odd explain plan > > > > Hi. > > > > I am tuning a query that runs against a star > schema > > and a few dimension tables. The plan shows that > the > > first step is two join two dimension tables via a > > cartesian join. Why would Oracle does that instead > of > > joining the dimensions to the fact table one after > > another? Can anyone offer an explanation? > > > > thank you > > > > ===== > > > > > > __________________________________________________ > > Do You Yahoo!? > > Yahoo! Movies - coverage of the 74th Academy > Awards® > > http://movies.yahoo.com/ > > -- > > Please see the official ORACLE-L FAQ: > http://www.orafaq.com > > -- > > Author: Gene Gurevich > > 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). ===== __________________________________________________ Do You Yahoo!? Yahoo! Movies - coverage of the 74th Academy Awards® http://movies.yahoo.com/ -- Please see the official ORACLE-L FAQ: http://www.orafaq.com -- Author: Gene Gurevich 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).