RE: odd explain plan

From: Khedr, Waleed <Waleed.Khedr_at_FMR.COM>
Date: Tue, 26 Mar 2002 14:30:07 -0800
Message-ID: <F001.0043440F.20020326143007@fatcity.com>

search for Star Query Execution Method
in this doc: http://www.dbatoolbox.com/WP2001/dssdw/star_query.pdf

-----Original Message-----
Sent: Tuesday, March 26, 2002 4:54 PM
To: Multiple recipients of list ORACLE-L

Read about star schema execution plan.

Regards,

Waleed

-----Original Message-----
Sent: Tuesday, March 26, 2002 4:26 PM
To: Multiple recipients of list ORACLE-L

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

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Author: Khedr, Waleed
  INET: Waleed.Khedr_at_FMR.COM

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Author: Khedr, Waleed
  INET: Waleed.Khedr_at_FMR.COM

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To REMOVE yourself from this mailing list, send an E-Mail message to: ListGuru_at_fatcity.com (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). Received on Tue Mar 26 2002 - 16:30:07 CST