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Message Posted: Mon, 14 Feb 2005 @ 09:54:58 GMT


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Subj:		Random Amp Sampling

From:		Anomy Anom

<-- Anonymously Posted: Monday, February 14, 2005 04:52 -->

Hello!!

I am executing explains on a much skewed table with no stats collected on it. As the parser would be doing *random* amp sampling should not I be getting different estimates for every execution or does it sample from the amp that corresponds to the table id of the table to get consistent explains? The document also says that an amp is chosen randomly.

Please help me understand.

Thanks.