Re: KLIST question

[Scott Klement <klemscot@xxxxxxxxxxxx>]

On Wed, 11 Apr 2001 Gary.Brown@appliedchemicals.com wrote:
> 
> I have a logical over my invoices file, the KLIST for it is
> 
>  KEYINV    KLIST
>            KFLD           CUSNO
>            KFLD           CSITE
>            KFLD           INVDT
> 
> My question is how can I retrieve all the invoices for a particular date
> regardless of customer or site
> 

Basically, you have 4 options:

1) The the WHOLE file in RPG, and ignore anything that doesn't match
     the date you specified.   (Not a method I would recommend)

2) Run an OPNQRYF on the file, and read that.   Note that this doesn't
     actually require a CL program, you could run the OPNQRYF directly
     from your RPG program.

3) Use SQL.  This would basically yield the same result as the OPNQRYF,
     but SQL is a much more standard method of accessing databases than
     OPNQRYF.  

4) Use a logical file.  


Each method has its pros and cons.  Unless the file is tiny, I wouldn't
give much thought to option #1.   If saving the space, etc of a logical
file is more important than instant response time, I'd use option #2.
If speed is more important I'd use option #4.

Option #3 may be a better choice, but I wouldn't use it because I don't
own the SQL licensed program. :)  So I use OPNQRYF instead.



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