Re: Join-logical (accessible via an RPGLE CHAIN statement) keyed across two different PFs -- any way to do this?

James,
Glad you have this resolved.
I had written on a blank 8.5x11 sheet of paper your example and still could
not diagram the relationships. For example "that ties every record in BAR
to a record in FOO". How?

If you were trying to find the latest BLORB in BAR why not just have a LF
on BAR based on BLORB, position with *hival and read that?


On Mon, Mar 18, 2024 at 3:19 PM James H. H. Lampert via MIDRANGE-L <
midrange-l@xxxxxxxxxxxxxxxxxx> wrote:

My situation from my original question ("The story you are about to see
is true; only the names have been changed, to protect the innocent") is,
for reference:

Got a couple of PFs. Call them FOO and BAR.

FOO is uniquely keyed on fields HAM and EGGS, and contains additional

field SPAM (which is the unique key of logical FOO_1

BAR has a field, FROTZ, the first key on logical BAR_1, that ties every

record in BAR to a record in FOO. And it also has a field, BLORB, which is
a date.

And I'm trying to check the latest BLORB for any given HAM. Not just for
one HAM, but for all possible HAMs.

Turns out (to my surprise) that just going through all the FOO records
for a given HAM value, and checking a logical of BAR by FROTZ and
descending BLORB, does the job, at a more than reasonable speed, even
repeating it for all possible HAMs.

--
JHHL
--
This is the Midrange Systems Technical Discussion (MIDRANGE-L) mailing list
To post a message email: MIDRANGE-L@xxxxxxxxxxxxxxxxxx
To subscribe, unsubscribe, or change list options,
visit: https://lists.midrange.com/mailman/listinfo/midrange-l
or email: MIDRANGE-L-request@xxxxxxxxxxxxxxxxxx
Before posting, please take a moment to review the archives
at https://archive.midrange.com/midrange-l.

Please contact support@xxxxxxxxxxxxxxxxxxxx for any subscription related
questions.