Archives of the TeradataForum
Message Posted: Tue, 11 Jan 2005 @ 19:22:41 GMT
<-- Anonymously Posted: Tuesday, January 11, 2005 13:04 -->
Explains indicate confidence levels of target cardinality and cost (time) estimates. Can these be equated to probability of correctness, such as High confidence is 90%, Low is 50% and No confidence 25%? Can I also convert the cost and cardinality shown by explains into CPU time and IO's approximately?
The above information would help me find the machine resource saved when a query is rejected by query Resource rule (TDQM). They are not standard queries so that we can multiply by the number of rejections for a standard query.
|Copyright 2016 - All Rights Reserved|
|Last Modified: 23 Jun 2019|