CBO not using the index even though it is faster when hinted ....

From: Johnson, Michael <Michael.Johnson_at_oln-afmc.af.mil>
Date: Thu, 23 Jan 2003 18:28:39 -0800
Message-ID: <F001.0053920F.20030123182839@fatcity.com>

Anyone have any problems with the CBO not using a index when you know it is faster by forcing a hint ?

I have set the following ...

Solaris
Oracle Version 8.1.7.4

block size = 8
DB_FILE_MULTIBLOCK_READ_COUNT = 8
mode = Choose

also using Tim Gormans 90 and 50 values for the other optimizer parms.

Select col1, col2, col3, blah1, blah2 from table order by col1, col2, col3;

Concatenate index on col1, col2, col3.

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Author: Johnson, Michael
  INET: Michael.Johnson_at_oln-afmc.af.mil

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