Re: READ with DS as result

[Jerry Adams <jerry@xxxxxxxxxxxxxxx>]

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
*IBM System i Programmer/Analyst
B&W Wholesale Distributors, Inc.* *
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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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