RE: Performance of SQL

["Bala, Narsi" <Narsi_Bala@xxxxxxxxxxxxxx>]

I thought db2 is intelligent enuf to  choose the best availabel accept path. 
Also if you use visualexplain the optimizer would make suggestions as to what 
kind of a index could be created to improve SQL performance. 

Narsi

-----Original Message-----
From: rpg400-l-bounces@xxxxxxxxxxxx
[mailto:rpg400-l-bounces@xxxxxxxxxxxx]On Behalf Of Erhardt, Bill
Sent: Thursday, April 15, 2004 10:41 AM
To: 'RPG programming on the AS400 / iSeries'
Subject: RE: Performance of SQL


The best way I've found to increase SQL performance in to use the create
index command to build access paths over the tables you are selecting.  To
have SQL tell you which access path to create, run your select in debug mode
and then look at your job log to see which field(s) the optimizer used to
access your data.
Bill Erhardt

-----Original Message-----
From: sushmita.s@xxxxxxx [mailto:sushmita.s@xxxxxxx] 
Sent: Thursday, April 15, 2004 3:06 AM
To: rpg400-l@xxxxxxxxxxxx
Subject: Performance of SQL


I want to improve the performance of my program which uses Interactive 
SQL. I am at present using 'SELECT' statements. Will  Cursor or Fetch 
increase the response time?



Sushmita Sivaraman

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