Portal | Manuals | References | Downloads | Info | Programs | JCLs | Mainframe wiki | Quick Ref
IBM Mainframe Forum Index
 
Register
 
IBM Mainframe Forum Index Mainframe: Search IBM Mainframe Forum: FAQ Memberlist Profile Log in to check your private messages Log in
 
Mainframe datasets without any last reference date

 
Post new topic   Reply to topic    IBMMAINFRAMES.com Support Forums -> All Other Mainframe Topics
View previous topic :: :: View next topic  
Author Message
rajatbagga

Active User


Joined: 11 Mar 2007
Posts: 196
Location: india

PostPosted: Tue Sep 24, 2019 8:47 am    Post subject: Mainframe datasets without any last reference date
Reply with quote

Hello Everyone,

Is it right to say that Mainframe datasets without any Last Reference Date should always be empty?

Regards
Rajat
Back to top
View user's profile Send private message

steve-myers

Active Member


Joined: 30 Nov 2013
Posts: 770
Location: The Universe

PostPosted: Tue Sep 24, 2019 9:54 am    Post subject:
Reply with quote

Not necessarily. It's possible for an unauthorized program to open a data set without updating the reference date. Notice I said "possible." It's legal, does not require anything underhanded, but it's an Assembler "trick" that is not available to high level languages. I have one program that does it. This program is doing an open for input. I don't know what would happen with an open for output.

If I recall correctly it's documented, but finding it is not so easy. I recall putting out a query in one of these forums and someone told me about the trick maybe 15 years ago.
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 -> All Other Mainframe Topics All times are GMT + 6 Hours
Page 1 of 1

 

Search our Forum:

Similar Topics
Topic Author Forum Replies Posted
No new posts Enabling Crosshair cursor in mainframe priya_t23 TSO/ISPF 2 Wed Nov 06, 2019 11:29 am
No new posts Convert mainframe data to .csv format... karan_reddy DFSORT/ICETOOL 10 Sat Nov 02, 2019 2:09 am
No new posts how are mainframe (z/OS) updates inst... martin schlatter All Other Mainframe Topics 5 Tue Oct 08, 2019 1:20 am
No new posts ADRDSSU BY(REFDT... not selecting cor... Greg Roschel IBM Tools 2 Wed Sep 18, 2019 7:23 pm
No new posts Date insertion returns -180 Raghu navaikulam CICS 1 Mon Jul 29, 2019 5:12 pm

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