RE: New application using remote databases from RPG program

The issue that I have with DDM is that if you wanted to access 100
tables on another system, you have to setup/maintain 100 DDM files.

With DRDA, just one Connect statement is needed.



-----Original Message-----
From: midrange-l-bounces@xxxxxxxxxxxx
[mailto:midrange-l-bounces@xxxxxxxxxxxx] On Behalf Of Vern Hamberg
Sent: 04 February 2010 22:38
To: Midrange Systems Technical Discussion
Subject: Re: New application using remote databases from RPG program

Interesting you recommend this article - because Elvis points out the
same thing I did - this is all doable with DDM RLA.

I have no problem with using embedded SQL (DRDA) other than the extra
code to manage all the connections. With DDM, that is implicit in the
DDM files. The code will be cleaner, seems to me.

Now the OP could use USROPN on the DDM files, too. Whether using DDM or
embedded SQL, seems to me he will be processing one remote system at a
time. It's kind of a wash, but I'd still lean toward DDM for its
simplicity and robustness - hey, it's legacy!! It ain't gonna break!!
Probably!!

Multiple simultaneous connections don't seem to gain anything here, so
far as I can tell.

:-)

McGovern, Sean wrote:

Go for DRDA !

Check

http://forums.systeminetwork.com/isnetforums/showthread.php?t=65101&high
light=connect

________________________________

From: midrange-l-bounces@xxxxxxxxxxxx on behalf of Vern Hamberg
Sent: Thu 04/02/2010 19:14
To: Midrange Systems Technical Discussion
Subject: Re: New application using remote databases from RPG program



If I'm not mistaken, he can have names for DDM files that differ but
point to the same-name PF on different machines, right? Then he can

list

them all in his RPG and open them all if he wants. You still have to
read each one on its own, but this seems like a VERY simple thing to

do.

And simple makes for much better maintenance down the road.

Legacy-phlegacy!! Go for DDM!!

JMHO
Vern

Nathan Andelin wrote:

Okay, it sounds like SQL may be the best way to retrieve the remote

data in this case. Whether you use SQL / DRDA or RPG Record Level
Access / DDM may also depend on how normalized the remote files are.
But, it sounds like SQL / DRDA may work best in your case.

-Nathan.



----- Original Message ----
From: sjl <sjl_abc@xxxxxxxxxxx>
To: midrange-l@xxxxxxxxxxxx
Sent: Thu, February 4, 2010 10:30:24 AM
Subject: Re: New application using remote databases from RPG program

Nathan -

We are gathering inventory balances and cost from the appropriate JDE

files

in all affiliates.

This information, once gathered into one comma or tab-delimited file

in the

special environment, will then be FTP'd to be processed by a BI

application

running on a PC server. Once the data is successfully obtained from

/all/

52 environments, the client (another department within the company)

wants

the aggregated data sent all at once, not 52 separate times...

- sjl


Nathan wrote:
Steve,

What would be the purpose of transferring the data to the "local"

system?

Why not just read remote data and output it to the client?
Are we talking 5250 or browser?
Would the new application be updating remote data, or just inquiry?

Nathan.

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