Portal | Manuals | References | Downloads | Info | Programs | JCLs | Master the Mainframes
IBM Mainframe Computers Forums Index
 
Register
 
IBM Mainframe Computers Forums Index Mainframe: Search IBM Mainframe Forum: FAQ Memberlist Usergroups Profile Log in to check your private messages Log in
 

 

How data buffering happens in CURSOR Fetch

 
Post new topic   Reply to topic    IBMMAINFRAMES.com Support Forums -> DB2
View previous topic :: :: View next topic  
Author Message
pavankumar.k
Currently Banned

New User


Joined: 21 Dec 2006
Posts: 2
Location: chennai

PostPosted: Tue Jan 30, 2007 6:45 am    Post subject: How data buffering happens in CURSOR Fetch
Reply with quote

hai,

when we are using cursor in a prog.after we declare cursor in w.s.s we code for fetch only or for update only why do we do this.

and when we have declared cursor for fetch will the data be brought to the buffer when open the cursor or when we use select stmt,how will the data be brought
Back to top
View user's profile Send private message

dick scherrer

Site Director


Joined: 23 Nov 2006
Posts: 19270
Location: Inside the Matrix

PostPosted: Tue Jan 30, 2007 6:53 am    Post subject:
Reply with quote

Hello,

Please post this in the DB2 forum. Your code may be COBOL, but this is a DB2 questions.

When you open the cursor, the set of matching rows will be retrieved/ordered. When you issue the fetch, one row at a time will be returned to your program.

If your program is only going to read rows, do NOT specify update. Systems that read rows for update when it is not needed often have performance problems. Tasks have to wait for locked rows that would have been available.
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 -> DB2 All times are GMT + 6 Hours
Page 1 of 1

 

Search our Forum:

Similar Topics
Topic Author Forum Replies Posted
No new posts Sorting group data rajella DFSORT/ICETOOL 3 Sun Jan 22, 2017 11:32 pm
No new posts Storing huge volume of data, compare ... Pradeep K M All Other Mainframe Topics 3 Mon Jan 16, 2017 5:08 pm
No new posts how to recover an uncataloged VSAM da... archanamuthukrishnan All Other Mainframe Topics 3 Wed Jan 11, 2017 6:18 pm
No new posts HALDB data refresh/copy from producti... vineetanand2007 IMS DB/DC 1 Mon Jan 02, 2017 11:16 am
No new posts JES2 JEC: Use UNIX Pipes to Pass Data... Virendra Shambharkar JCL & VSAM 21 Tue Dec 20, 2016 6:55 pm


Facebook
Back to Top
 
Mainframe Wiki | Forum Rules | Bookmarks | Subscriptions | FAQ | Tutorials | Contact Us