Re: Embedded SQL question

Vern,

I just went through the actual official IBM site (the Knowledge Center)
and for 7.1 it does in fact say that it CAN be dynamically prepared. So
the version I was looking at must have been wrong.

I'd say I'm the one with aliens!

Bill

On Wed, Sep 17, 2014 at 11:00 AM, Vernon Hamberg <vhamberg@xxxxxxxxxxxxxxx

wrote:

Bill

I was actually looking at the V5R1 manual - but I have the 6.1, which has
this in it -

"It is an executable statement that can be dynamically prepared, but
cannot be issued interactively."

I also have the SQL Reference in the help for RDi, which says the same as
the 6.1 does.

One of us has aliens in the building!!


Vern

On 9/17/2014 9:31 AM, Bill Howie wrote:

Vern,

Glad I could help! LOL

Can you give me a link to the manual that you were looking at? I was
looking at the DB2 SQL Reference for Version 7 and under the VALUES INTO
statement is this:

This statement can be embedded only in an application program. It is an
executable statement that cannot be dynamically prepared.

'Course, the copyright on this manual is 13 years old.

Not trying to doubt you. I'm guessing I'm not looking at the latest
reference manual and that would be handy. Thanks!

Bill

On Wed, Sep 17, 2014 at 10:17 AM, Vernon Hamberg <
vhamberg@xxxxxxxxxxxxxxx>
wrote:

LOL - now you made me dig into the manual!

I think - and should have noticed - that Birgitta was recommending the
VALUES INTO statement - so it's VALUES [some subselect or expression]
INTO
[host variables]

And that one can be dynamically prepared.

It's always worth something to me to have to go digging!! Thanks!

Vern


On 9/17/2014 8:35 AM, Bill Howie wrote:

Vern/Birgitta,

I just took a quick look in the SQL reference. It says that the VALUES
statement cannot be dynamically prepared, which is what is happening in
this case. Is that true?

Bill

On Wed, Sep 17, 2014 at 9:20 AM, Vernon Hamberg <
vhamberg@xxxxxxxxxxxxxxx
wrote:

Hi Bill

VALUES is a very useful statement - there is more detail in the SQL
reference, that is not practical to repeat all here - so I heartily
recommend looking it up.

A similar statement is SET, as I recall - check me by looking at the
reference - I've used it in an embedded SQL RPG program to get a
scan/replace before IBM provided %scanrpl - it requires that whatever
function you use returns a single value. Here's an idea of it - it
does
use
a host variable -

set :currtimestamp = current timestamp;

That gets microseconds, while I think RPG returned only milliseconds
(at
one time, at least).

So there are lots of things that come from SQL that you can use to set
variables in RPG directly.

HTH
Vern


On 9/17/2014 7:31 AM, Bill Howie wrote:

Birgitta,

Thanks for the info. So "VALUES" is a separate SQL statement
then? I
don't need an "INSERT INTO" or anything like that before it?

Bill

On Wed, Sep 17, 2014 at 1:47 AM, Birgitta Hauser <
Hauser@xxxxxxxxxxxxxxx>
wrote:

Correction the closing parenthesis at the end must be removed and

replaced

with a quote.

MySQLTEXT = 'Values(Select RRN(a), ' + %Trim(Field_Name) +
' From ' + %Trim(Library_Name) + '/' +
%Trim(File_Name) +
' a Where RRN(a) = 1) ' +
' into ?, ?';

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!"


-----Ursprüngliche Nachricht-----
Von: RPG400-L [mailto:rpg400-l-bounces@xxxxxxxxxxxx] Im Auftrag von
Birgitta
Hauser
Gesendet: Wednesday, 17.9 2014 06:52
An: 'RPG programming on the IBM i (AS/400 and iSeries)'
Betreff: AW: Embedded SQL question

SELECT INTO cannot be used in composition with dynamic SQL.
You either need a cursor, performing a PREPARE, DECLARE, OPEN, FETCH
and
CLOSE statement.
Or VALUES INTO which is supported in conjunction with dynamic SQL

MySQLTEXT = 'Values(Select RRN(a), ' + %Trim(Field_Name) +
' From ' + %Trim(Library_Name) + '/' +
%Trim(File_Name) +
' a Where RRN(a) = 1) +
' into ?, ?);

Exec SQL Prepare DynSQL From :MySQLText;

Exec SQL Execute DynSQL using :HostVarRRN, :HostVarField;

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!"

-----Ursprüngliche Nachricht-----
Von: RPG400-L [mailto:rpg400-l-bounces@xxxxxxxxxxxx] Im Auftrag von
Bill
Howie
Gesendet: Wednesday, 17.9 2014 06:35
An: rpg400-l@xxxxxxxxxxxx
Betreff: Embedded SQL question

Hello all,

I'm trying to use dynamic embedded SQL to retrieve a value in a
program.
I was originally trying to use host variables for the needed data
but
then
I
found out that you can't use host variables in dynamic SQL and that
you
have to use parameter markers instead. So here's what I have:

MySQLText = 'Select rrn(a), a.' + %Trim(Field_Name) +
' Into ?,?' + ' From ' +
%Trim(Library_Name) + '/' + %Trim(File_Name) +
' a where rrn(a) = 1';

exec sql
SET OPTION
commit=*none,
datfmt=*iso;

exec sql prepare selectRecord from :MySQLText; exec sql execute
selectRecord using :rrn,:OldCompany;

When I run the program in debug, the MySQLText field looks like
this:

Select rrn(a), a.CONO15 Into ?,? From COPYAULT2/INP15 a wher e
rrn(a)
= 1

and I get the following errors:

Token ? was not valid. Valid tokens: : <IDENTIFIER>.
Prepared statement SELECTRECORD not found.


I'm stumped as to what to do from here. This SQL statement should
yield
one record (and does when run interactively) and the thing I'm
trying
to
grab is the value in :OldCompany.

Any help would be MOST appreciated. Thanks!

Bill
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