RE: Runtime KLIST change?

Frank,

One way that it can be done is to use a "program-described" file
specification, rather than the more normal "externally-described" file.  On
the F-spec., provide a record length that is at least as long as your longer
file and a key length that is at least as long as your longest key.  Data
structures can help with your field definitions.

At execution time, use an OVRDBF command to override to the file you
actually want to work with.  Then when you need to SETLL/READ or CHAIN to
your run-time file, initialize a field to be used as your key (same length
as the key length of your F-spec.) with the value(s) from your key field(s)
plus low values for the balance of the key length.  Then use this field to
SETLL or CHAIN with.

Elegant?  No.  Doable? Certainly!

William K. Reger
Senior Project Manager
Levitz Furniture Corporation
Phone:  (561) 994-5114
E-mail:  breger@levitz.com <mailto:breger@levitz.com> 


        -----Original Message-----
        From:   Frank Steinjan [SMTP:fstone@wtal.de]
        Sent:   Saturday, December 04, 1999 3:13 AM
        To:     RPG400-L@midrange.com
        Subject:        Runtime KLIST change?

        Hallo,

        as V4.4 offers more and more possibillities I would like to know if
        there is any trick to handle different KLISTs in an RPG-Program. I
had
        the following problem:

        I wanted to use file file_x1 and file_x2 within the same program.
        KLIST of x1 consists of field_a and field_b while x2 consists only
of
        field_b.

        What I wanted to do is to define field_a and field_b as pointers
where
        in case of file_x2 field_a points to NULL. But this doesn't work.
        Perhaps someone outhere can gimme a hint.
        Thanx in advance...

        Frank

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