RE: RPG Cycle

fkolmann wrote:

>Anyhow recently I had this case,
>Order Header File (Keyed by Order number)
>Order Detail File  (Keyed by Order Number,  Line Number) 
>Invoice Detail File (Keyed by Order Number , Line Number) 
>I asked a programmer to use Control breaks and MR to find
>mismatched Headers and also mismatches between the 
>Order Lines and Invoice Lines,  we had a problem using MR 
>to find orphaned Invoice Detail Lines, we had to write 2
>programs the first using the Header as a primary file, the 
>second used the Detail as the Primary file.
>Perhaps you have a suggestion how we can do this with 
>one program.

There's nothing inherently wrong with two programs since you need to pass
through the data twice anyway, but it you want to, you could write 2 SQL
embedded statements along the lines of Select ... from header where ordnum
not in (select ordernbr from detail) and Select ... from detail where
ordernbr not in (select ordnum from header).

(sticking to the RPG topic) You could also do it in one program like this:

fhdr  if    k disk
fdtl  if    k disk

setll *loval hdr
loop
  read hdr
  chain dtl
  no record -> print error
endloop

setll *loval dtl
loop 
  read dtl
  chain hdr
  no record -> print error
endloop

You can do the same thing in RPG II by making 4 F-Specs and using overrides.
Define one primary (header), one secondary (detail) and 2 files to CHAIN to.

Buck Calabro
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