RE: CBO irregularity

From: Jacques Kilchoer <Jacques.Kilchoer_at_quest.com>
Date: Mon, 7 Jun 2004 16:31:06 -0700
Message-ID: <B5C5F99D765BB744B54FFDF35F60262109F878C4@irvmbxw02>

When would up-to-date statistics not be valid? Do you mean, for example, a different number of histograms or different sample sizes were collected with the "up-to-date" statistics?

-----Original Message-----

Daniel Fink

...
If you don't have valid (not the
same as up-to-date) statistics on all the objects (and corollary objects) referenced in the query, you might get some defaults that are unrealistic or it may perform dynamic sampling.

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Received on Mon Jun 07 2004 - 18:28:05 CDT