Re: SQLRPG - prepare, declare, no cursor

["rick baird" <rick.baird@xxxxxxxxx>]

Thanks Mike,

I don't have a big problem with this at all, except that it might be slower?

I wonder, would it have to evaluate the host variable (A1L0x) for each
record retrieved to determine it's inclusion?

On 4/12/06, Michael_Schutte@xxxxxxxxxxxx <Michael_Schutte@xxxxxxxxxxxx> wrote:
> Rick,
>
> I use this type of code all the time.  It works really well.
>
> WHERE  PRER = :A1ER
>  AND  (PRL01 = :A1L01 Or :A1L01 = '     ')
>  AND  (PRL02 = :A1L02 Or :A1L02 = '     ')
>  AND  (PRL03 = :A1L03 Or :A1L03 = '     ')
>  AND  (PRL04 = :A1L04 Or :A1L04 = '     ')
>  AND  (SUBSTRING(PREN,6,4) = :A1EN4 Or :A1EN4 = '    ')
>  AND  (PRFNM LIKE (CASE
>                     WHEN :FName <> ' ' THEN :FName
>                     ELSE '                  '
>                    END)
>       OR :FName = ' ')
>
> It will only pick records, when my host variables are populated.
>
> Michael Schutte
> Work 614-492-7419
> email  michael_schutte@xxxxxxxxxxxx
>
>
>
>             "rick baird"
>             <rick.baird@gmail
>             .com>                                                      To
>             Sent by:                  "RPG programming on the AS400 /
>             rpg400-l-bounces@         iSeries" <rpg400-l@xxxxxxxxxxxx>
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>                                                                   Subject
>             04/12/2006 12:55          Re: SQLRPG - prepare, declare, no
>             PM                        cursor
>
>
>             Please respond to
>              RPG programming
>              on the AS400 /
>                  iSeries
>             <rpg400-l@midrang
>                  e.com>
>
>
>
>
>
>
> sort of.
>
> the problem is dynamically assembling my where clause.  don't know
> until runtime what I'm going to select on.
>
> For what it's worth - I ended up changing it anyway - getting the
> count is going to be much slower than fetching one record (optimize
> for 1 record) - the requirement is to check for a valid combination of
> fields in this file, and it's only checking, not listing or updating.
>
> so i'm going to fetch one record to validate instead of returning a
> count - I don't care how many, only that one exists, and I want it to
> run as quickly as possible.
>
> thanks to all who helped.
>
> On 4/12/06, Thomas Gard <thomas.gard@xxxxxxxxx> wrote:
> > Is this what you want?
> >
> > C/EXEC SQL  -- SQL STATMENTS
> > C+ SELECT COUNT(*)
> > C+   INTO :COUNTER
> > C+   FROM lmsfillib/jobque
> > C/END-EXEC
> >
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