Re: F Specs on an OVRDBF -- RPG400-L

You can do it with OVRDBF but I would not. But first, let supposed that you do 
go the OVRDBF way.

Lets say that your logical are named P701L1 and P701L2. In your F spec use 
P701L1 and in your CL
you use one of the 2 following override depending on which vendor you want to 
access:
OVRDBF (P701L1) to (P701L1)   
or
OVRDBF (P701L1) to (P701L2)

That will work.

But then again, I think that this is a bad way to solve this problem. What if 
you add another vendor, you will have to had a new logical and you will have to 
modify the CL. And what if you change a vendor number ...

A better approach would be:

- create one logical file (lets call it P701L1) with the key made of the vendor 
number and the product number next.
- then you pass as a parameter to your RPG program the vendor number that you 
want to work with.
- In the RPG program, use the READE opcode instead of the READ opcode (look up 
the manual, you will understand the difference) to extract record from the 
P701L1 file

This way, you will need just one logical file regardless of the number of 
vendor and this way, any change in the number of vendor or their id will have 
no impact on the CL or RPG program


Hope this help.

Denis Robitaille
Directeur services techniques
Cascades Inc
819 363 5187
fax 819 363 5177


>>> LCobb@PapaGinos.com 06/08/00 02:25pm >>>

Salutations,

I have a product master file (P701).  I had to write the online maintenance
in such a way that when the DP clerk selects product maintenance they are
prompted as to which vendor they wish to do maintenance on.  So only those
products with that particular vendor code are accessible through
maintenance.  I created two logicals utilizing the select.  One for each
vendor.  
I know I can do it with BLDQRYSLT, but I prefer to try to utilize OVRDBF in
my CLP.  I have only been programming for a year.  I am self taught and I
want to get a better grasp on this OVRDBF.  My boss allows me to learn
everything I can, to try new approaches whenever possible, and get exposure
on all that RPG, CL, and SQL has to offer. (RPGIV is coming soon). That is
why I am choosing OVRDBF (if it is possible).
My question is (because my boss is on vacation) what do my Fspecs need to
look like?  I have looked in all the manuals and infoseeker but I can't find
this info.
I am thinking my CL should be:
OVRDBF (PFILE) TO (VENDOR CODE SPECIFIC LFILE)

Should my Fspecs contain only the PFILE (update) or do I need the
LFILE's(input) in there also?

Am I even close with this?  Am I wrong in thinking that it can be done this
way?

Thank you in advance for any info or insight you can shed on this matter.

LAC
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