Using the substring function
Use the Substring Qualifier function to customize substring parameters.
On the Offload DSN Specification panel, choose the Substring Qualifier function.
Substring Parameters
BSY$OSTR
Enter the Qualifier Code ==>
Enter Starting Position ==>
Enter Substring Length ==>
On the Substring Parameters panel, you can specify almost any of the qualifier codes and specify the string's starting position and length. For example, qualifier code 3 generates a string of &SSID, a four-character subsystem name. However, if your site uses three-character SSIDs, you can specify option 24 to specify the SSID and customize the string length, as follows:
Substring Parameters
BSY$OSTR
Enter the Qualifier Code ==> 3
Enter Starting Position ==> 1
Enter Substring Length ==> 3
An example of the results is shown in the following panel:
BSY$OFF3 V2R2 ------ LP Offload DSN Specification ------ 2021/11/11 14:27:39
Option ===>
-------------------------------------------------------------------------------
Creator: CSTSUK Name: DFSMSDSS BACKUP METHOD SSID: I9A2
Share Option: U (Upd,View,No) Description: DFSMSDSS BACKUP METHOD
-------------------------------------------------------------------------------
Enter codes to create a dataset name specification:
Qualifier code ==> Free form literal ==> Show DSN ==> N
Current dataset name qualifier string:
&SSID(1,3).
Valid dataset name specification codes are:
1. Volser 9. Day (DD) 17. Backup Type (#18.#19)
2. *Reserved* 10. Julian Day (DDD) 18. Local/Recovery (L/R)
3. Subsystem ID 11. Hours (HH) 19. Primary/Backup (P/B)
4. User ID 12. Minutes (MM) 20. Job Name
5. Time (HHMMSS) 13. Seconds (SS) 21. Step Name
6. Date (YYYYDDD) 14. Timestamp 22. Profile Creator
7. Year (YYYY) 15. Random Number 23. Profile Name
8. Month (MM) 16. GDG (+1)..(+n) 24. Substring Qualifier
25. Use freeform literal