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In an HLL on Iseries (RPG or COBOL or other) is there a "best practices" method to build an I/O subroutine?
For example to read a customer record, should the i/o routine contain ONLY a read, with any positioning/accept/reject logic outside the i/o routine?
Or should the i/o routine be a black box which returns ONLY records that the program is interested in processing?
Or is either approach equally accepted?
Or a better approach?
This would be AFTER an SQL or opnqryf or LF does its own filtering of the cust file.
Also, is a priming read widely used to start sequential processing of a file, or is there a better method?
(at my current job, priming reads are avoided, but that seems to add lots of complexity and layers - but maybe its just that Im not used to it)
I know these are basic q's, but my new job is challenging stuff I thought was standard!
Thanks!
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