Re: Allow null in data structure

If you goto www.think400.dk/downloads.htm, the third item down is a article
I wrote on using SQL in RPG and nulls. Using Null in RPG and SQL. Might
have you some ideas.

On Wed, Feb 13, 2019 at 1:43 PM Alan Campin <alan0307d@xxxxxxxxx> wrote:

No, SQL reference.

D CustomerDS DS
D CustID 7P 0
D CustName 30A
D CustSales 7P 2

D CustomerInds S 5I 0 Dim(3)

D NullValue C -1

/Free

Exec SQL
Select CustID, CustName, CustSales
Into :CustomerDS :CustomerInds
From Customer
Where CustID = :InputCust;

If SQLState = '00000';

If CustomerInds(3) = NullValue;
PrintSales = 'No Sales';
Else;
PrintSales = ('Sales were $' + %Char(CustSales));
EndIf;
EndIf;


On Wed, Feb 13, 2019 at 1:37 PM Jeff Crosby <jlcrosby@xxxxxxxxxxxxxxxx>
wrote:

The RPG reference? OK, I'll look.

On Wed, Feb 13, 2019 at 4:34 PM Alan Campin <alan0307d@xxxxxxxxx> wrote:

Allow Null and %NullInd are for file I/O, not SQL.

In SQL you create array of small int, one for each field in the data
structure. If null, array element is set to non-zero. All described in

the

manuals.

On Wed, Feb 13, 2019 at 1:24 PM Jeff Crosby <jlcrosby@xxxxxxxxxxxxxxxx>
wrote:

I'm doing an SQL full outer join of 2 files looking for exceptions

both

ways. The select is into data structures.

Obviously there will be instances where one or the other of the files

has

nothing so the DS fields will be null. I've got a ALWNULL(*USRCTL)
statement. I've got an If %Nullind (iITNBR) in the code.

The compiler barfs trying to put ALWNULL on the DS definition. How

do I

specify ALWNULL on a DS? My googling skills are lacking today.

Thanks.

--


Jeff Crosby
VP Information Systems
UniPro FoodService/Dilgard
P.O. Box 13369
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The opinions expressed are my own and not necessarily the opinion of

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Jeff Crosby
VP Information Systems
UniPro FoodService/Dilgard
P.O. Box 13369
Ft. Wayne, IN 46868-3369
260-422-7531
direct.dilgardfoods.com

The opinions expressed are my own and not necessarily the opinion of my
company. Unless I say so.
--
This is the RPG programming on the IBM i (AS/400 and iSeries) (RPG400-L)
mailing list
To post a message email: RPG400-L@xxxxxxxxxxxxxxxxxx
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