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I had never tried reading a record directly into a data structure so the idea intrigued me. I went digging through the texts on my bookshelf, but couldn't find anything on this behavior.

However, the ILE RPG manual (page 417) does say: The CHAIN, READ, READC, READE, READP, and READPE operations may have a result data structure. For these operations, data is transferred directly between the file and the data structure, without processing the input specifications for the file. Thus, no record identifying or field indicators are set on as a result of an input operation to a data structure. If all input operations to the file have a result data structure, input specifications are not required.

That's the only thing that I could find that related to this process.

* Jerry C. Adams
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Mackie, Roger L. (Precision Press) wrote:
If I understand it correctly, it is because you told the system to put
the data in the qualified data structure instead of the default input
buffer. When you execute 2, because the qualified name is different than
the input buffer name, the input buffer remains empty unless you execute
1.

HTH,
Roger Mackie

-----Original Message-----
From: rpg400-l-bounces@xxxxxxxxxxxx
[mailto:rpg400-l-bounces@xxxxxxxxxxxx] On Behalf Of David Foxwell
Sent: Tuesday, September 25, 2007 3:21 AM
To: rpg400-l@xxxxxxxxxxxx
Subject: READ with DS as result

Hi,

I only just discovered I could put a DS in the result of a CHAIN or READ
operation.

I declared my DS with LIKEREC(name of format).


Can someone please explain this :
1. CHAIN CLT_Number CLIENT;
2. CHAIN CLT_Number CLIENT MyDS;

In 1, The zones of the file CLIENT are filled if the client is found, eg
CLT_Name = "Smith".
In 2, I now have MyDS.CLT_Name = "Smith" but CLT_Name is no longer
filled. Why is this?

TIA


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