File Matching › File Matching › How to Code Match-file Runs

How to Code Match-file Runs

Step 1

Sort all files in ascending match-key sequence.

See the chapter Additional Standard File Facilities for creating sorted files.

Step 2

Code:

1. One INPUT parameter with the MK= option for each file to be matched.

   Match keys must be either all numeric or all alphanumeric. Numeric types can be mixed:

   • Specify the DD= option on all or none of the IN parameters.
   • Specify MB=KEEP if a record is to be matched against multiple occurrences of another file.
   • Correlate the coding sequence of the CA Culprit file definitions with the sequence of JCL statements that define the files (SYS010, SYS011, and additional increments, as needed).
2. REC parameters immediately following the associated INPUT parameter:
   • Use unique names for all fields.
   • Use start positions that are relative to the beginning of the record (not to the beginning of the input buffer).
3. Optional SELECT/BYPASS parameters:
   • After the REC parameters of the specific file to be processed.
   • With the BUFFER option immediately after the last input file definition if the processing applies to all files after matching takes place.