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Message Posted: Wed, 19 Nov 2008 @ 20:30:56 GMT


     
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Subj:   Re: Stats collection on Index Column
 
From:   Singh, Lakhwant

Michael:

I also thought the same thing as you have mentioned in your comments. But sometimes it really makes a difference and that difference can be seen in the EXPLAIN plans of various SQL's.

In fact I thought that collecting stats on UPI is also not required as it is always ONE AMP operation. But again, sometimes EXPLAIN shows the difference like "LOW CONFIDENCE" or "HIGH CONFIDENCE".


Lakhwant Singh
Certified Teradata SQL Specialist



     
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