Home Page for the TeradataForum

Archives of the TeradataForum

Message Posted: Tue, 06 Sep 2011 @ 15:41:08 GMT

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

Subj:   Re: Stats Refresh Post Expansion
From:   DWellman

Interesting. Where have you seen this description of what the stats hold ?

The optimiser certainly uses all/most of the information that you list below, but it doesn't get that info from statistics.

Statistics contain (for instance):

Number of rows in the table

Number of unique values for the column(s) in question Max value Number of rows with NULLs

i.e. it describes the DATA - not the environment.



Ward Analytics Ltd - Information in motion (www.ward-analytics.com)

  <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: 15 Jun 2023