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Message Posted: Tue, 02 Jul 2003 @ 00:25:50 GMT


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Subj:		Re: Dynamic Sampling

From:		Mishra, Sandipan

When the Optimizer is not provided with COLLECTed STATISTICS, it will perform Dynamic Sampling using a random AMP in order to estimate table demographics. Dynamic Sampling is done during the parsing procedure. The Parser is more aggressive with COLLECTed STATISTICS.

Sandipan

Sandipan Mishra
Teradata Certified Master
San Diego CA 92127