How do you know an index scan would be faster? Did you get the query to use
an index? What hint? Do you have the tracing stats for
both with and without an index?
First, you dont have a where clause filter on an indexed column?
If all the columns in the select were indexed, maybe u could have possibly
used a Fast Full Index Scan hint?
Regards
Raj
"Johnson, Michael "
<Michael.Johnson@oln-af To: Multiple recipients of list
ORACLE-L <[EMAIL PROTECTED]>
mc.af.mil> cc:
Sent by: Subject: CBO not using the
index even though it is faster when hinted
[EMAIL PROTECTED] ....
January 23, 2003 09:28
PM
Please respond to
ORACLE-L
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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