Solved

Use of DB2_INLIST_TO_NLJN

Posted on 2008-06-16
4
1,752 Views
Last Modified: 2010-04-21
DB2_INLIST_TO_NLJN ---  the registry variable

"db2set DB2_INLIST_TO_NLJN=TRUE

This will convert the IN List to a NLJN and can force the usage of the index"

What is the internal structure of this registry variable. Does it creat a temp table for the IN predicted values on the fly.

How does it works?


0
Comment
Question by:bengoal
  • 3
4 Comments
 

Author Comment

by:bengoal
ID: 21795671
what are the pros and cons, using a registry variable.

I have the following set of registry variables :

[i] DB2_SKIPINSERTED=ON
[i] DB2_USE_ALTERNATE_PAGE_CLEANING=ON
[i] DB2_INLIST_TO_NLJN=YES
[i] DB2_ALLOCATION_SIZE=134217728
[i] DB2_EVALUNCOMMITTED=ON
[i] DB2_EXTENDED_OPTIMIZATION=ON
[i] DB2_SKIPDELETED=ON
[i] DB2_NEW_CORR_SQ_FF=ON
[i] DB2_STRIPED_CONTAINERS=ON
0
 

Author Comment

by:bengoal
ID: 21795682
[i] DB2_SKIPINSERTED=ON
[i] DB2_USE_ALTERNATE_PAGE_CLEANING=ON
[i] DB2_INLIST_TO_NLJN=YES
[i] DB2_MINIMIZE_LISTPREFETCH=YES
[i] DB2_ALLOCATION_SIZE=134217728
[i] DB2_EVALUNCOMMITTED=ON
[i] DB2_EXTENDED_OPTIMIZATION=ON
[i] DB2_SQLROUTINE_PREPOPTS=REOPT{ALWAYS}
[i] DB2_SKIPDELETED=ON
[i] DB2_NEW_CORR_SQ_FF=ON
[i] DB2_STRIPED_CONTAINERS=ON
[i] DB2BIDI=YES
[i] DB2_RR_TO_RS=YES
[i] DB2COMM=tcpip
[i] DB2CODEPAGE=1208
[i] DB2_PARALLEL_IO=*
[i] DB2AUTOSTART=YES
0
 
LVL 37

Accepted Solution

by:
momi_sabag earned 500 total points
ID: 21795902
db2 creates an in-memory table that holds the values from your in list and then joins this table
0
 

Author Closing Comment

by:bengoal
ID: 31467695
Any idea what is the impact of the Registry variables I mentioned.
0

Featured Post

Master Your Team's Linux and Cloud Stack

Come see why top tech companies like Mailchimp and Media Temple use Linux Academy to build their employee training programs.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

November 2009 Recently, a question came up in the DB2 forum regarding the date format in DB2 UDB for AS/400.  Apparently in UDB LUW (Linux/Unix/Windows), the date format is a system-wide setting, and is not controlled at the session level.  I'm n…
Recursive SQL in UDB/LUW (it really isn't that hard to do) Recursive SQL is most often used to convert columns to rows or rows to columns.  A previous article described the process of converting rows to columns.  This article will build off of th…
This video shows how to quickly and easily add an email signature for all users on Exchange 2016. The resulting signature is applied on a server level by Exchange Online. The email signature template has been downloaded from: www.mail-signatures…

828 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question