My experience has been that RPG keeps track of the RRN in the INFDS just fine for blocked I/O.
So I went and looked it up. I quoted the section on blocking:
http://publib.boulder.ibm.com/infocenter/iadthelp/v7r0/index.jsp?topic=/com.ibm.etools.iseries.langref.doc/c092508687.htm
Blocking Considerations
The fields of the input/output specific feedback in the INFDS and in most cases the fields of the device specific feedback information section of the INFDS, are not updated for each operation to the file in which the records are blocked and unblocked. The feedback information is updated only when a block of records is transferred between an RPG program and the operating system.
However, if you are doing blocked input on a data base file, the relative record number and the key value in the data base feedback section of the INFDS are updated:
* On every input/output operation, if a POST for any file with factor 1 blank has not been specified anywhere in your program.
* Only after a POST for the file, if a POST for any file with factor 1 blank has been specified anywhere in your program.
You can obtain valid updated feedback information by using the CL command OVRDBF (Override with Database File) with SEQONLY(*NO) specified. If you use a file override command, the ILE RPG compiler does not block or unblock the records in the file.
For more information on blocking and unblocking of records in RPG see WebSphere Development Studio: ILE RPG Programmer's Guide.
Kurt Anderson
Sr. Programmer/Analyst
CustomCall Data Systems, a division of Enghouse Ltd.
-----Original Message-----
From: rpg400-l-bounces@xxxxxxxxxxxx [mailto:rpg400-l-bounces@xxxxxxxxxxxx] On Behalf Of Gary Thompson
Sent: Monday, November 19, 2012 2:52 PM
To: RPG programming on the IBM i / System i
Subject: RE: How can I retrieve the RRN of a record in a PF in a RPG3?
Daryl,
Your KINFDS definition looks ok to me.
As someone else mentioned, if your program is doing blocked I/O, then you may not get the RRN value - which makes sense to me but I am not sure.
I have used RRN from the INFDS some years past, but no longer have access to that system, and do not have any code at my current POE.
Maybe run your program with no blocking (OVRDBF xxx FRCRATIO *NONE), assuming you have not already tried that.
-----Original Message-----
From: rpg400-l-bounces@xxxxxxxxxxxx [mailto:rpg400-l-bounces@xxxxxxxxxxxx] On Behalf Of Darryl Freinkel
Sent: Monday, November 19, 2012 1:44 PM
To: rpg400-l@xxxxxxxxxxxx
Subject: How can I retrieve the RRN of a record in a PF in a RPG3?
I have a need to retrieve the RRN of the record read in a RPG OPM program.
(this is a re-posting).
FWRK959 IF E K DISK
F KINFDS DS
IDS DS
I B 397 4000RRN
C READ WRK959 01
C *IN01 DOWEQ*OFF
C POST WRK959
C Z-ADDRRN RRNX 155
C READ WRK959 01
C ENDDO
C MOVE *ON *INLR
I created a test program (above) and it does not show the RRN, or have an invalid value after the first read. It then shows zero or blanks.
Can anyone help with retrieving the RRN?
Darryl Freinkel | Assignment 400 Group, Inc.
Tel: 770.321.8562 ext 111 | Fax 770.321.8562
E-mail: dfreinkel@xxxxxxxxxxxxxxxxx
Web: www.assignment400.com
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