Home Page for the TeradataForum
 

Archives of the TeradataForum

Message Posted: Tue, 08 Oct 2013 @ 20:14:01 GMT


     
  <Prev Next>   <<First <Prev Next> Last>>  


Subj:   Re: Expalin under estimating the stats calculation in 13.10 version
 
From:   Panchal, Hemanshu

David Roth wrote:

  I would assume the issue is related to the fact theat the v12 estimated count is off also. Sounds like you do not have the right statistics for the sub-query  


Yes Dave, I am extracting year from a date field and joining the same with year field of other column, therefore I am not able to get exact stats but how can I make optimizer to estimate near the value stats as currently its picking just 800 of actual value of 35000 whereas TD 12 over estimates it to 2 million


Thanks

Hemanshu Panchal
TDCOE Team
Morgan Stanley



     
  <Prev Next>   <<First <Prev Next> Last>>  
 
 
 
 
 
 
 
 
  
  Top Home Privacy Feedback  
 
 
Copyright for the TeradataForum (TDATA-L), Manta BlueSky    
Copyright 2016 - All Rights Reserved    
Last Modified: 23 Jun 2019