Yes ... I can force the hint, but why wont it take the RBO path ? Its a difference of 7 seconds versus a split second. So why would the CBO take that path ?
-----Original Message----- Sent: Friday, January 24, 2003 1:14 PM To: Multiple recipients of list ORACLE-L hinted Well, if it can do it under rule-based, then it shouldn't be able to ignore the hint under CBO - I don't suppose there's any chance that you have a typo in the hint ? Regards Jonathan Lewis http://www.jlcomp.demon.co.uk Coming soon a new one-day tutorial: Cost Based Optimisation (see http://www.jlcomp.demon.co.uk/tutorial.html ) ____UK_______March ____USA_(FL)_May 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: 24 January 2003 21:06 hinted >All the columns in the table are not null ... > >here is an interesting test I ran ... > >several Direct_Path_Write and Read waits with large elasped times >are showing up in the 10046 trace data on this query due to the >full table scan. > >Just deleted statistics on this and fwiw ... > >With Statistics .... >===================== > >SELECT Statement Optimizer=Choose (Cost=225 ...) > SORT (Order By) (Cost=225 ...) > Table Access (Full) of 'table1' > >Physical Reads = 433 > >Without Statistics .. >====================== > >SELECT Statement Optimizer=Choose > Table Access (By Index Row) of 'table1 > Index ( Full Scan ) of 'concatenated index' (Non-Unique) > >Physical Reads = 0 > >Mike -- 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). -- Please see the official ORACLE-L FAQ: http://www.orafaq.net -- Author: Johnson, Michael 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).
