RE: Sqlcod question -- RPG400-L

Where Exists (Select .... From ... )

-----Original Message-----
From: rpg400-l-bounces@xxxxxxxxxxxx [mailto:rpg400-l-bounces@xxxxxxxxxxxx] On Behalf Of William A. Erhardt
Sent: 20 November 2012 12:43
To: RPG programming on the IBM i / System i
Subject: RE: Sqlcod question

How does one code an EXISTS in Iseries SQL. I checked the V7R1 SQL Reference manual and it doesn't have an example.

-----Original Message-----
From: rpg400-l-bounces@xxxxxxxxxxxx [mailto:rpg400-l-bounces@xxxxxxxxxxxx] On Behalf Of McGovern, Sean
Sent: Tuesday, November 20, 2012 1:39 AM
To: RPG programming on the IBM i / System i
Subject: RE: Sqlcod question

The code below would fail if there are multiple matching records. EXISTS should be used to check on data existence.

________________________________________
From: rpg400-l-bounces@xxxxxxxxxxxx [rpg400-l-bounces@xxxxxxxxxxxx] on behalf of Matt [matt@xxxxxxxxxxx]
Sent: 19 November 2012 18:35
To: 'RPG programming on the IBM i / System i'
Subject: RE: Sqlcod question

Not sure if this would be of any benefit, but if I am understanding correctly what you are trying to achieve, I like to do the following;

D Found s n inz('0')

Found=*off;
EXEC SQL
Select '1' into :Found
from rates
where opcode =:zcode;
if SQLCOD<000;
"WHAT'S THE PROBLEM"
endif;
// Found represents a positive match to the sql request if Found;
"DO SOMETHING HERE"
endif;

Cheers.
Matt.

-----Original Message-----
From: rpg400-l-bounces@xxxxxxxxxxxx [mailto:rpg400-l-bounces@xxxxxxxxxxxx]
On Behalf Of William A. Erhardt
Sent: Monday, November 19, 2012 12:30 PM
To: RPG programming on the IBM i / System i
Subject: RE: Sqlcod question

You have to FETCH the resulting dataset into a variable to see if the SQL returned any data.

-----Original Message-----
From: rpg400-l-bounces@xxxxxxxxxxxx [mailto:rpg400-l-bounces@xxxxxxxxxxxx]
On Behalf Of Rpglist
Sent: Monday, November 19, 2012 12:01 PM
To: rpg400-l@xxxxxxxxxxxx
Subject: Sqlcod question

I have the following embedded code:

Exec SQL
Declare C1 cursor for
Select * from rates
Where opcode =:zcode;
Exec SQL open C1;

Now I know for a fact that there will not be a match right now meaning that the value of zcode is not in the file.....so why does Sqlcod return all zeros?

Sent from my iPhone
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