Re: I think I need multi-threading but I'm only on V5R4M5 -- RPG400-L

Bryce,

While RPG might require THREAD(*SERIALIZE) at v5r4....

That doesn't preclude your RPG program from creating threads...

However, multi-threading is generally a hard concept to handle...

Additionally, it seems to me that you're thinking "old school"
here...to much consideration about how to get the data.

Assuming you have a 2+-way system and DB2 SMP enabled, check your
QQRYDEGREE system values and the PARALLEL_DEGREE value in QAQQINI,
then the system with multi-thread your query request on it's own.

Depending on the data, and how your 7 search fields interact (AND/OR),
having user created separate key/value tables may just be maintenance
overhead...it might be better to have 7 individual EVI indexes over
the 7 fields and let the system handle it for you.

Have you tried the "easy" solution?

Charles

On Tue, Oct 5, 2010 at 1:43 PM, Bryce Martin <BMartin@xxxxxxxxxxxx> wrote:

Well I have come upon a project where I think I need multi-threading in
RPGLE but I am only on V5R4M5.

Here is the scenario...
We have a file that we need to search. There are 7 fields in each record
that can be searched. As few as 1 or as many as all 7 can be specified.
What I've done is broken out these fields into Key,Value pairs for faster
searching. By keeping each searchable field as a seperate table ask the
Key and having the key field from the main file as the Value. I will then
return all matching values to the main search program.

My basic structure would be something like....

if parm1 <> '';
searchfield1()
endif;

if parm2 <> '';
searchfield2();
endif;

....

if parm7 <> '';
searchfield7();
endif;

Since each of these searches are on different files I want to be able to
do them in parallel to speed it up. Is there a way to do this without
doing a sbmjob. I can't do the sbmjob since I need to gather the results
of each searchfield procedure and then compile a master list.

Any idea will be appreciated.

Thanks
Bryce Martin
Programmer/Analyst I
570-546-4777
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