From Arn.Klammer@austrac.gov.au Tue, 11 Dec 2001 22:55:33 -0800 From: "Arn Klammer" Date: Tue, 11 Dec 2001 22:55:33 -0800 Subject: Costs in explain plan Message-ID: MIME-Version: 1.0 Content-Type: text/plain Hi, Can you compare the costs that are displayed in explain plan output? For example, I have a query that contains a merge join. The cost reported in the explain plan is 134. By including a hint to use a nested loop instead, the cost becomes 1160. Does this mean the merge join plan is more efficient, despite generally being considered a less efficient join method than a NL? Thanx -a ********************************************************************** This email and any files transmitted with it are confidential and intended solely for the use of the individual or entity to whom they are addressed. If you have received this email in error please notify the system manager. This footnote also confirms that this email message has been swept by MIMEsweeper for the presence of computer viruses. www.mimesweeper.com ********************************************************************** -- Please see the official ORACLE-L FAQ: http://www.orafaq.com -- Author: Arn Klammer INET: Arn.Klammer@austrac.gov.au 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: ListGuru@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).