RE: FW: How to fetch into an array using dynamic SQL -- RPG400-L

Why not defining a data structure and read the data into this data
structure?
It is then even possible to overload the data structure with an array.

Mit freundlichen Grüßen / Best regards

Birgitta Hauser

"Shoot for the moon, even if you miss, you'll land among the stars." (Les
Brown)
"If you think education is expensive, try ignorance." (Derek Bok)
"What is worse than training your staff and losing them? Not training them
and keeping them!"
?Train people well enough so they can leave, treat them well enough so they
don't want to.? (Richard Branson)

-----Original Message-----
From: RPG400-L <rpg400-l-bounces@xxxxxxxxxxxxxxxxxx> On Behalf Of mlazarus
Sent: Freitag, 13. August 2021 23:48
To: RPG programming on IBM i <rpg400-l@xxxxxxxxxxxxxxxxxx>
Subject: Re: FW: How to fetch into an array using dynamic SQL

Birgitta, thanks for the response. I guess I'll have to specify all the
fields individually as the recipients of the INTO. Out of curiosity, is
there some function that could pivot the individual fields into a UDT?

-mark

On 8/13/2021 2:07 PM, Birgitta Hauser wrote:

It is exactly the DIM which makes the difference!
An array cannot be used in composition with embedded SQL.

It is possible to read multiple rows in a multiple row fetch into an
array data structure, but then you also have to specify how many rows
you want to repeat.
FETCH Next FROM YourCursor For x Rows INTO :ARRDS;

Mit freundlichen Grüßen / Best regards

Birgitta Hauser

"Shoot for the moon, even if you miss, you'll land among the stars."
(Les
Brown) "If you think education is expensive, try ignorance." (Derek
Bok) "What is worse than training your staff and losing them? Not
training them and keeping them!"
?Train people well enough so they can leave, treat them well enough so
they don't want to.? (Richard Branson)

-----Original Message-----
From: Birgitta Hauser<Hauser@xxxxxxxxxxxxxxx>
Sent: Freitag, 13. August 2021 16:41
To: 'RPG programming on IBM i'<rpg400-l@xxxxxxxxxxxxxxxxxx>
Subject: RE: How to fetch into an array using dynamic SQL

Genau der DIM ist es!
Eine Feldgruppe ist nicht zulässig in SQL.

Du kannst mehrere Datensätze mit einem multiple row fecht in eine
Array Datenstruktur lesen, aber dann musst Du auch im FETCH die Anzahl
der Zeilen, die Array-Datenstruktur einlesen:
FETCH Next FROM YourCursor For x Rows INTO :ARRDS;

Mit freundlichen Grüßen / Best regards

Birgitta Hauser

"Shoot for the moon, even if you miss, you'll land among the stars."
(Les
Brown) "If you think education is expensive, try ignorance." (Derek
Bok) "What is worse than training your staff and losing them? Not
training them and keeping them!"
?Train people well enough so they can leave, treat them well enough so
they don't want to.? (Richard Branson)

-----Original Message-----
From: RPG400-L<rpg400-l-bounces@xxxxxxxxxxxxxxxxxx> On Behalf Of
mlazarus
Sent: Freitag, 13. August 2021 15:29
To: RPG programming on IBM i<rpg400-l@xxxxxxxxxxxxxxxxxx>
Subject: Re: How to fetch into an array using dynamic SQL

Hi Birgitta,

D CodesDS ds
D Codes Like( RC01 )
D Dim( 5 )

I also tried, which shouldn't make a difference:

D Codes s Like( RC01 )
D Dim( 5 )

-mark

On 8/13/2021 1:49 AM, Birgitta Hauser wrote:

Can you show how you defined CODES?

Mit freundlichen Grüßen / Best regards

Birgitta Hauser

"Shoot for the moon, even if you miss, you'll land among the stars."
(Les
Brown)
"If you think education is expensive, try ignorance." (Derek Bok)
"What is worse than training your staff and losing them? Not training
them and keeping them!"
?Train people well enough so they can leave, treat them well enough
so they don't want to.? (Richard Branson)

-----Original Message-----
From: RPG400-L<rpg400-l-bounces@xxxxxxxxxxxxxxxxxx> On Behalf Of
mlazarus
Sent: Freitag, 13. August 2021 03:02
To: RPG400-L@xxxxxxxxxxxxxxxxxx
Subject: How to fetch into an array using dynamic SQL

Is is possible to fetch multiple fields into an array with dynamic

SQL?

I'm using dynamic because the file name is passed to the program.
The actual number of "repeating" fields is much larger than the five
I am displaying.

StmtSQL = 'SELECT ' +
'max(RC01), max(RC02), max(RC03), max(RC04), max(RC05)' +
' FROM ' + InputFileName ;

Exec SQL PREPARE S1 FROM :StmtSQL ;
Exec SQL DECLARE C1 CURSOR FOR S1 ;
Exec SQL OPEN C1 ;

// Codes is defined as an array with the corresponding number of
buckets as // the fields I'd like to populate.
Exec SQL FETCH C1 INTO :Codes ;

The SQL pre-compiler complains:
SQL0312: Position 32 Variable CODES not defined or not usable. Reason:
No declaration for the variable exists, the declaration is not within
the current scope, or the variable does not have an equivalent SQL
data

type.

Is there a syntax that would work to populate the array?

-mark

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