Portal | Manuals | References | Downloads | Info | Programs | JCLs | Mainframe wiki | Quick Ref
IBM Mainframe Computers Forums Index
 
Register
 
IBM Mainframe Computers Forums Index Mainframe: Search IBM Mainframe Forum: FAQ Memberlist Profile Log in to check your private messages Log in
 
Copybook Structure change - recalculation of segment length

 
Post new topic   Reply to topic    IBMMAINFRAMES.com Support Forums -> IMS DB/DC
View previous topic :: :: View next topic  
Author Message
Keanehelp

New User


Joined: 27 May 2008
Posts: 70
Location: USA, CA.

PostPosted: Fri Jul 04, 2008 9:33 am    Post subject: Copybook Structure change - recalculation of segment length
Reply with quote

Hi,
We are modifying the structure of an existing IMS segment(increasing overall size by 1 byte and expanding a variable in the middle of the segment resulting in all following variables being displaced by 1 byte)

While writing the program to restructure the data, do we need to recalculate and update the length of each record using this segment ?

Also please could you let me know the various scenarios when the segment length for each record in an IMS database needs to be recalculated ?

Thanks
Back to top
View user's profile Send private message

Sandy Zimmer

Active Member


Joined: 13 Jun 2007
Posts: 826
Location: Wilmington, DE

PostPosted: Fri Jul 04, 2008 10:34 am    Post subject:
Reply with quote

If you are adding a byte to the middle of your segment in an EXISTING database, you are going to have a real mess unless you are very careful. If your database is defined as variable length, you always need to insert it with a recalculated length. Since you are going thru all the trouble of writing a conversion program, why not put all variables at the end of your segment?
Back to top
View user's profile Send private message
View previous topic :: :: View next topic  
Post new topic   Reply to topic    IBMMAINFRAMES.com Support Forums -> IMS DB/DC All times are GMT + 6 Hours
Page 1 of 1

 

Search our Forum:

Similar Topics
Topic Author Forum Replies Posted
No new posts How to change the logon screen info o... sakthikumarT TSO/ISPF 4 Fri Dec 29, 2017 6:44 pm
No new posts Change NULL indicator in UNLOAD utility Khadhar Basha DB2 2 Fri Dec 15, 2017 3:01 pm
No new posts Extract record for change in combinat... Trinadh DFSORT/ICETOOL 6 Thu Nov 23, 2017 3:32 pm
No new posts sort records based on length exceeds ... maxsubrat DFSORT/ICETOOL 7 Wed Oct 04, 2017 4:48 pm
No new posts Partial color change of a field in CI... waseem0424 CICS 5 Fri Sep 29, 2017 7:56 pm

Facebook
Back to Top
 
Job Vacancies | Forum Rules | Bookmarks | Subscriptions | FAQ | Polls | Contact Us