IBM Mainframe Forum Index
 
Log In
 
IBM Mainframe Forum Index Mainframe: Search IBM Mainframe Forum: FAQ Register
 

Advantage of Updating record using Db key instead of CALC


IBM Mainframe Forums -> IDMS/ADSO
Post new topic   Reply to topic
View previous topic :: View next topic  
Author Message
Shaheen Kalokhe

New User


Joined: 21 Feb 2008
Posts: 21
Location: India

PostPosted: Thu Feb 21, 2008 6:07 pm
Reply with quote

Hello,

I would like to know the advantage of Updating a record using its DB Key
instead of CALC key. Does anyone has any idea of the time saved by using Db key based updates.

Thanks

Shaheen
Back to top
View user's profile Send private message
puviarasu

New User


Joined: 10 Mar 2008
Posts: 4
Location: India

PostPosted: Tue Mar 11, 2008 7:13 pm
Reply with quote

Updating a record using DB-KEY is advantageous since the DB-KEY is the address of the particular record. Its the Page number + line number of that record. So if you try to update a record using the DB-KEY it will locate the record using this key value which is straight forward.

But when u update the same record using the CALC key, it should locate the record based on the calcing logic... which might require few more operations and consume more CPU time... which will be slightly slower than the first one...
Back to top
View user's profile Send private message
Shaheen Kalokhe

New User


Joined: 21 Feb 2008
Posts: 21
Location: India

PostPosted: Tue Mar 11, 2008 9:14 pm
Reply with quote

Thanks for uri reply puviarasu

But what exactly i am looking for is the time difference. I already know that update using DB-Key is efficient. If ua have some details pertaining to time pals do reply.

Thanks

Shaheen
Back to top
View user's profile Send private message
puviarasu

New User


Joined: 10 Mar 2008
Posts: 4
Location: India

PostPosted: Tue Mar 11, 2008 9:46 pm
Reply with quote

I don't have the detail regarding the time difference for this particular scenario. I can suggest one thing while coding a batch program we can retrieve the TIMESTAMP before and after the execution of the DML statements(bulk) using the DB-KEY/CALC-KEY which might give the time difference.
Back to top
View user's profile Send private message
View previous topic :: :: View next topic  
Post new topic   Reply to topic View Bookmarks
All times are GMT + 6 Hours
Forum Index -> IDMS/ADSO

 


Similar Topics
Topic Forum Replies
No new posts How to split large record length file... DFSORT/ICETOOL 10
No new posts SFTP Issue - destination file record ... All Other Mainframe Topics 2
No new posts FINDREP - Only first record from give... DFSORT/ICETOOL 3
No new posts To find whether record count are true... DFSORT/ICETOOL 6
No new posts Validating record count of a file is ... DFSORT/ICETOOL 13
Search our Forums:

Back to Top