Re: Looking up a record by key field

["Gary Morrison" <gmorrison@xxxxxxxxxxxxxxx>]

I may be missing something here, but the read commands are the same, you just
define the file(s) as  keyed or sequential.   Usually a  physical file  (type
PF) is not defined with a key, the logical file (type LF) isused to key the
file.

Gary




Dan Taylor <dtaylor@ecdh.org> on 12/27/2000 04:40:08 PM

Please respond to COBOL400-L@midrange.com

To:   "Cobol400-L Mailing List (E-mail)" <cobol400-l@midrange.com>
cc:    (bcc: Gary Morrison/IS/Celina)
Subject:  Looking up a record by key field




     I have been programming in COBOL in a VAX / VMS environment for a few
years and have discovered that the IBM AS/400 environment is significantly
different from what I had been used to.  Can anyone tell me what the ILE
COBOL400 statements are to:

1.  Select a master file (with patient-number as the key) to be read
sequentially.

2.  Select a supplemental patient data file (also with patient-number as
the key) in which I want to look up the corresponding patient number from
the master file.

3.  Read the supplemental data file by key field (patient number).

     In other words, I need to read each record of the master file
sequentially, look up the corresponding supplemental patient data in the
supplemental file (by patient number) if a supplemental record for the
patient exists, edit data in the fields of the supplemental file's record
(if it exists), then re-write the supplemental file's record.

Any assistance would be GREATLY appreciated.


Dan Taylor
Erie County Department of Health


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