Re: Quick SQL expression evaluation

[Luis Rodriguez <luisro58@xxxxxxxxx>]

Dennis,

AFAIK, that can't be done BUT, I wonder if you could do a PREPARE/EXECUTE
combo against, say SYSIBM/SYSDUMMY1?. I little convoluted, I know (and I'm
sure not very efficient), but *maybe* that would answer your question...

Regards,

Luis Rodriguez
IBM Certified Systems Expert — eServer i5 iSeries


On Tue, May 25, 2010 at 8:00 AM, Dennis Lovelady <iseries@xxxxxxxxxxxx>wrote:

> 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?
>
>
>
> --
> This is the RPG programming on the IBM i / System i (RPG400-L) mailing list
> To post a message email: RPG400-L@xxxxxxxxxxxx
> To subscribe, unsubscribe, or change list options,
> visit: http://lists.midrange.com/mailman/listinfo/rpg400-l
> or email: RPG400-L-request@xxxxxxxxxxxx
> Before posting, please take a moment to review the archives
> at http://archive.midrange.com/rpg400-l.