RE: Can you use UDS but NOT lock the data area?

[Joe Giusto <jgiusto@xxxxxxxxxxxxxx>]

I am a little behind in reading emails, but had to ask:
Why does it matter that you are locking up your local data area?  are there
other programs in the stack trying to read it?  


 -----Original Message-----
From:   Booth Martin [mailto:Booth@xxxxxxxxxxxx] 
Sent:   Wednesday, July 02, 2003 7:19 AM
To:     rpg400-l@xxxxxxxxxxxx
Subject:        Re: Can you use UDS but NOT lock the data area?

Scott, it should work to use the UDS so long as you also use the keyword
DTAARA(*LDA).  The line below is copied straight from the manual.
 
 
D LDA_DS UDS DTAARA(*LDA)  
 
Then you can lock and unlock the data area at will.
 
---------------------------------------------------------
Booth Martin   http://www.MartinVT.com
Booth@xxxxxxxxxxxx
---------------------------------------------------------
 
-------Original Message-------
 
From: RPG programming on the AS400 / iSeries
Date: Wednesday, July 02, 2003 12:06:26 AM
To: RPG programming on the AS400 / iSeries
Subject: Re: Can you use UDS but NOT lock the data area?
 
 
On Tue, 1 Jul 2003, Michael Gottlieb wrote:
>
> It seems when I use "UDS" to define a data area to my program, the data
> area is locked for the duration of the program. Is there a way to
> prevent this? I still want to use UDS but not lock the data area.
>
 
When you define a data area using UDS, the RPG program will read it
automatically when the program starts, lock it, and update/unlock it
only when the program ends. That's what UDS is for.
 
If you want to read a data area without doing that, use the IN & OUT
RPG op-codes instead of UDS.
 
Here's an example of that:
 
D LDA DS DTAARA(*LDA)
D RptDate 1 8A
D RptType 105 106A
 
D MyDtaAra DS 200 DTAARA('QGPL/MYDTAARA')
D LastRun 1 8A
D LastRptType 105 106A
 
** Load the LDA. This does not lock it.
c in LDA
c dsply RptDate
c dsply RptType
 
** Load My Data Area. This does not lock it.
c in MyDtaAra
c dsply LastRun
c dsply LastRptType
 
** Load My Data Area again, this time lock it and update it.
c *lock in MyDtaAra
c eval LastRun = RptDate
c eval LastRptType = RptType
c out MyDtaAra
 
c eval *inlr = *on
_______________________________________________
 

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