RE: OPNQRYF performance using joins with a large file

[Joe Teff <jteff19@xxxxxxx>]

> Maybe there is no need for that Join .....
>
> Have a View over your sales History Detail File by Customer and Invoice Date
> (preferably *YYMD format )
>
> WCUST#
> WDATE  ..... format *YYMD
>
> (If you do not have this Date format maybe is a good idea to reconsider 
>recreating
> the Sales Detail File)
>
> Use a simple program to SETLL by CUSTOMER / INVOICE DATE (From Date)
> and READE by CUSTOMER until you reach the To Date Value.(If the Date is
> in ascending Order)  Build a workfile with the WITEM Information.
>
> Use the New Work File (Or a New View of that workfile) to generate your 
>Report.

This is the way I would have solved it if I could. I intentionally simplified 
my earlier
description. The Customer/Chain is only one aspect. I also have Items that work 
the
same way. Item Numbers, Vendor Numbers, Item Class Codes and Retail
Departments are all part of the Item definition. I load a second work file 
(VELITEM)
with Item Numbers and use it just like my first workfile for Customers. I need 
to
know why OPNQRYF is building the intermediate file. Sorry, but your solution can
not help me. Thanks anyway. I am only describing part of the requirements. QMQRY
cannot solve this either.

Joe Teff

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