Re: Quick SQL expression evaluation

[dmosley@xxxxxxxxxx]

That's an interesting trick.  I would have hoped that some like using 
"SELECT COUNT(*) INTO ? FROM ITEM" would work the same.

>  /Free
>    String = 'SELECT COUNT(*) INTO ? FROM ITEM';
>    /Exec SQL Prepare DynSQL From  :String;
>    /Exec SQL Execute DynSQL using :MyResult;
>   Dsply MyResult;
>  /End-Free


David L. Mosley, Jr.
Technical Solutions Architect
Dancik International, Ltd.
2000 CentreGreen Way, Suite 250
Cary, NC 27513

www.dancik.com 



Luis Rodriguez <luisro58@xxxxxxxxx> 
Sent by: rpg400-l-bounces@xxxxxxxxxxxx
05/25/2010 05:04 AM
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RPG programming on the IBM i / System i <rpg400-l@xxxxxxxxxxxx>


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Re: Quick SQL expression evaluation






Wow!! Thanks Birgitta!! ..

One can always trust that you will find the solution to almost any SQL
problem, this one will go into the archives.


Best Regards,

Luis Rodriguez
IBM Certified Systems Expert â eServer i5 iSeries


On Tue, May 25, 2010 at 8:21 AM, Birgitta Hauser 
<Hauser@xxxxxxxxxxxxxxx>wrote:

> Try the following:
>
> D MyResult     S           11P 2
> D String       S          256A     Varying
> D Expr         S          256A     Varying inz('2 + 2')
>  /Free
>    String = 'Values(' + Expr + ') into ?';
>    /Exec SQL Prepare DynSQL From  :String;
>    /Exec SQL Execute DynSQL using :MyResult;
>   Dsply MyResult;
>  /End-Free
>
>
>
>
> Mit freundlichen GrÃÃen / 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!"
>
> -----UrsprÃngliche Nachricht-----
> Von: rpg400-l-bounces@xxxxxxxxxxxx 
[mailto:rpg400-l-bounces@xxxxxxxxxxxx]
> Im
> Auftrag von Dennis Lovelady
> Gesendet: Tuesday, 25. May 2010 14:30
> An: 'RPG programming on the IBM i / System i'
> Betreff: Quick SQL expression evaluation
>
> I am trying to write a procedure I thought would be extremely simple: a
> short SQL evaluation program that would simply take an expression and
> return
> the result of SQL operating on that expression.  For a silly example:
>
> Exec sql set :myResult   = 2 + 2 ;
>
>
>
> To minimize complexity, I am passing the '2 + 2' part as a string, so 
that
> the meat of this very short procedure is:
>
> Exec sql setl :myResult = :myExpression ;
>
>
>
> But (and, yes, I know I should have expected this) SQL is seeing it as 
the
> string "2 + 2" rather than a pair of values with an operator between 
them.
> Is there an SQL verb/clause that informs the SQL processor that the
> following is an expression rather than a string (such as with unix' 
"expr"
> command)?  Or is this just a pipe dream, not worth the effort?
>
>
>
> Dennis E. Lovelady
> AIM/Skype: delovelady      MSN: fastcounter@xxxxxxxxxxxx
>  <http://www.linkedin.com/in/dennislovelady>
> www.linkedin.com/in/dennislovelady --
> You can't have everything.  Where would you put it?
>
>
>
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