Home Page for the TeradataForum
 

Archives of the TeradataForum

Message Posted: Wed, 16 Dec 2015 @ 20:57:03 GMT


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


Subj:   Re: Why there is a USI restriction on Join Indexes.
 
From:   Anomy Anom

<-- Anonymously Posted: Wednesday, December 16, 2015 17:09 -->

USI on JI is not allowed simply to keep index maintenance overhead more manageable.

NUSI is AMP-local so no need to separately journal data value changes for the index - if the AMP rolls back a base table row, then it already has the information needed to also roll back any corresponding NUSI change.



     
  <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