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Message Posted: Fri, 20 Jun 2003 @ 14:00:30 GMT


     
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Subj:   Re: Statistics didn't change
 
From:   Prescott, Kyle R

For Teradata, if no stats exist, the optimizer will randomly sample an AMP (RAS) to gather a basis for optimizer costs. It may be the sample vs. actual.

Collect stats on tablename column colunname - will collect stats for the specified columname.

Collect stats on tablename - will recollect stats for all columns/indexes with existing stats. This will not necessarily collect stats on every column of the table - unless every column has statistics present already.

Kyle Prescott
Teradata Certified Professional



     
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