MVSFORUMS.com

[naveen]

HOw can we change the already defined key of KSDS vsam file programmatically in COBOL program ?

[dbzTHEdinosauer]

If there is no physical change to the record structure:

• repro to a qsam
• delete the vsam
• define the vsam with the new key
• repro the qsam to the new vsam
• make appropriate changes in all programs that reference the vsam record or perform I/O on the file

If there is a physical change to the record structure:

• if the file is very large
  • write a conversion program
    • reads old structure
    • reformats record
    • writes new structure
  • define new vsam file
  • run conversion pgm
• if the file is small
  • repro old to qsam
  • write cobol to convert old qsam to new qsam
  • sort new qsam
  • define new vsam
  • repro new qsam to new vsam

_________________
Dick Brenholtz
American living in Varel, Germany

[dbzTHEdinosauer]

The of course only process the new vsam structure with the updated cobol programs.
_________________
Dick Brenholtz
American living in Varel, Germany

[jyoung]

Could you create an alternate index and then access it that way?