I am writing a COBOL program to compare two files(sorted) Curr-file & Prev File.Both have layout as PersonID,DependentId,RelationType.
Single PersonId may have multiple DependentId with various relationship Types.
Whenever there is a change in RelationType I need to write a new o/p file as below.
PersonID,DependentId,RelationType, ADD/CHG/DEL, (--> need to add a indicator at end like ADD/CHG/DEL).
If there is no change in record then dont write.
Prev-file have 10 records with one PersonId with various relationship Types for different DependentId
Curr File have 12 records with
6 unchanged records
2 new DependentId(which are not exists in prev file) and 2 new relation types
3 records have just change in relation types with old DependentId(as prev file)
Result file should contain
ADD - 2 records
CHG - 3 records
DEL - 1 record
I looked at example program ibm-cobol/file-match-merge-sample-code-t881.html, looks like it may not work as my file contains duplicate PersonId. Can anyone help me with some ideas?