Re: F Specs on an OVRDBF

There are several solutions.

1)  'Best' way.  Keep your items in one file.  Vendors in 
another.  Third file is which vendors supply which items.  
This file would only have two fields:  item, vendor.  Create 
a key on this file unique selecting both fields, I don't 
care which field is first, selecting all records.  Add another 
logical using the other order, again selecting all records.

2)  If the gods have deemed that you cannot have a vendor/item 
cross reference, that you must keep a vendor number in the item 
master, then the following.  The primary key on the file should 
be the item number, unique.  Create one logical that uses the 
vendor#, then the item#, selecting all records.

Use the SETLL function in RPG to position a subfile by vendor 
and display only that vendors item's.

If the user doesn't want a subfile but wants to key the item 
number directly then use the primary key and if the vendor 
number ain't right then tell them so.


Don't use separate logicals.






LCobb@PapaGinos.com on 06/08/2000 02:16:10 PM
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Subject:        F Specs on an OVRDBF


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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