-v processing

[Nancy Palmquist]

Dennis Malen wrote:
> Using Nancy's suggestion concerning the use of the automated index I have 
> found the following:
> When I use:
>  ~ If:    ww="" and 3 lt dt
>  Then: lookup -  k=dt   i=B -ng
> ------   -   -   -   -   -   -
>  ~ If: 3 ge dt and 3 le dy     '
>  Then: select
> ------   -   -   -   -   -   -
> I get an additional record that does not meet my criteria. It is the first 
> record that filepro sees that it seems to accept.
>
> In order to fix the problem I reversed the process and used:
>  ~ If: 3 ge dt and 3 le dy     '
>  Then: select
> ------   -   -   -   -   -   -
>  ~ If:   ww="" and 3 lt dt
>  Then: lookup -  k=dt   i=B -ng
> ------   -   -   -   -   -   -
>  This fixed the problem.
> I am on 5.0.
>
> ANOTHER POINT:
>
> I did not have to put the -In on the menu line in order for the index to 
> work.
>
> Dennis Malen
> 516.479.5912 
>
> _______________________________________________
> Filepro-list mailing list
> Filepro-list at lists.celestial.com
> http://mailman.celestial.com/mailman/listinfo/filepro-list
> .
>
>   
Dennis,

I saw your comment and thought maybe you just got lucky but you may want 
to review this information.

The point of the lookup dash (-) is to move you to another record.

So if you picture the file as a list of letters like the alphabet and 
you start at record A,

you do a lookup - k="M" i=a -nx

What you are doing is moving to record M.  Now that does not identify 
direction when you select that record and issue an END command.  What 
insures that you move to the N record is the fact that you used index A 
which is built alphabetical when you ran the report.

Without doing the -iA on the menu line, what you get is the next record 
in the file, which may or may not be >M.  If it is not, you will need to 
do a lookup - to get to M, which kind of puts you in an infinite loop.

Now if you do not move alphabetically by design so you can jump to the 
beginning of the group and then watch to see when you pass the end of 
the group, you are jumping all over the file with no end in site.

Remember you can have more than one M entry so you can not get to the 
second M using lookup - you have to let the normal movement from record 
to record happen to get all the records you need.

Also you need to issue the SELECT command when you are sitting on a 
record that matches your criteria and not on the other records, that you 
need to see at the beginning and end of the file.

Nancy



-- 
Nancy Palmquist 		MOS & filePro Training Available
Virtual Software Systems	Web Based Training and Consulting	
PHONE: (412) 835-9417		   Web site:  http://www.vss3.com