Re: PGM assist?

[Mark Lazarus <mlazarus@xxxxxxxx>]

Dennis,

 I like the technique.  BTW, wouldn't it make more sense not to put RECDS
on the CHAIN line?
>      C           GETRRN    CHAINUXSRCHM   RECDS      60 
                                            ^^^^^
 Then it won't overlay the fields from the original file.  You could then
do the UPDAT w/ RECDS and the fields would update properly.  Am I missing
something?


>Another way, is to:
> o 'program describe' the UXSRCHM, with a really big record size, and
>   define some extra information for processing USSRCHM, as follows:
>      FUSSRCHM IP  E                    DISK         KINFDS FILEDS
>      FUXSRCHM UF  F    9999            DISK 
>      F                                              KRECNO GETRRN
>       (you won't need input specs for this file, and I'll discuss the
>        RECNO line shortly and the INFDS shortly)
> o Put an externally-described data structure into your program, such as:
>      IRECDS     E DSUSSRCHM
> o Define the file data structure that you promised RPG, like:
>      IFILEDS      DS                                      
>      I                                    B 397 4000$REC#    
> o Define GETRRN (or some field name, matching the RECNO line from above)
>   (numeric, 8,0)
> o When you find a record that you want to update, $REC# will contain the
>   Relative Record Number within the physical file.  We can use that to
>   retrieve the record for update, as follows:
>      C                     Z-ADD$REC#     GETRRN
>      C           GETRRN    CHAINUXSRCHM   RECDS      60    (or whatever
indic you want)
>   (This will retrieve the record for update, and put its data into your
>    data structure RECDS.  After populating/changing the fields you want
>    to effect, simply do the following:
>      C                     UPDATUXSRCHM   RECDS
>
>No extra files needed, no extra compile wrappers needed.  The only two
>ill effects of this approach are:
>  o If your filesize ever actually exceeds 9999 bytes, (God forbid!),
>    this approach will not work
>  o You will get a "Buffer size longer than record size" message in the
>    joblog when the file is opened (severity 10, no big deal).

 -mark

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