RE: Fast File Compare

[Chris Bipes <chris.bipes@xxxxxxxxxxxxxxx>]

I Still have a couple of program, some new, that are primary/secondary
matching records.  It is fast, easy, and simple.  But a programmer does have
to understand the RPG Cycle.  For comparing large files, you can not beat
it.  I have to monthly update files that are open and in use 24x7 on three
machines.  IP on new file, US add on live file, keyed processing.  The logic
is simple, if it exists in the primary and not the secondary, add.  If it
exists in the secondary not the primary, delete.  If it exist in both,
compare external data structures, if there is a difference, update the
secondary with the primary.  About 15 lines of code and the cycle does all
the work.  This is what RPG was designed for.  I will pit it against any SQL
statement that will do a record by record compare and update with the
secondary file is open and being used.

I also use it for auditing the mirroring between 3 AS400s.  Reporting and
updating the differences at the field level.

Be careful to sort your files the same before using CMPPFM.


Christopher K. Bipes    mailto:ChrisB@Cross-Check.com
Sr. Programmer/Analyst  mailto:Chris_Bipes@Yahoo.com
CrossCheck, Inc.        http://www.cross-check.com
6119 State Farm Drive   Phone: 707 586-0551 x 1102
Rohnert Park CA  94928  Fax: 707 586-1884

If consistency is the hobgoblin of little minds, only geniuses work here.
Karen Herbelin - Readers Digest 3/2000

-----Original Message-----
From: eperozzi@teamlab.com [mailto:eperozzi@teamlab.com]
Sent: Monday, November 13, 2000 11:42 PM
To: RPG400-L@midrange.com
Subject: RE: Fast File Compare



Hello All !

Few questions & and my humble opinion:

How many programmers are still around that know how to write a matching
record program....?
>> I forgot !

Are we sure is still "the most efficient way" ? (performance speaking)
>> I drought !

Can really SQL do the same ?
>> If yes then forget matching records !

Ain't  "matching record" going to be dropped all together with Primary file
support ?
>> ??

euro perozzi
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