Home Page for the TeradataForum
 

Archives of the TeradataForum

Message Posted: Thu, 07 Jul 2005 @ 21:08:02 GMT


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


Subj:   Fast Path Insert not possible with Begin Transaction????
 
From:   Mirjam Berger

Hi,

there was a recent thread here about rollbacks in which Dieter wrote:

  An insert/select into an empty table works without transient journal (there's only one entry, "table was empty"), *if* the optimizer knows that the transaction is commited:  


  Teradata session: there was no "begin transaction", so the ins/sel is a single transaction.  


  ANSI session: ins/sel followed by a commit submitted as a multistatement  


  A rollback will then be processed similar to a delete without where condition, almost immediatly (similar to a truncate in other DBMSes).  


Do I read this right?

Will a statement like the following not use fastpath insert?

     Begin transaction;

     insert into my_empty_table
     select from bla;

     end transaction;

I am surprised! Where can I find more information on this????


Thanks for your help!

Mirjam



     
  <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: 27 Dec 2016