RE: Embedded SQL

Thanks for the help!  What I did was to put the sql statements in a
compile-time array with the one option part of the WHERE clause in one
element.  If I don't need it, I simply clear it.  If I do, I build that
part using concatenation of strings.

It works but I wonder if there's an easier way.








"Russell Conerly" <rconerly@netdoor.com> on 03/31/2000 01:07:32 PM

To:   RPG400-L@midrange.com
cc:    (bcc: Tom Tufankjian/AS400/MIS/HBL)

Subject:  RE: Embedded SQL




Tom,

If you trying to dynamically build your SQL statement you will need the
PREPARE before the declare.

C/exec sql
C+ PREPARE STMT FROM :dynamic_stmt
C/end-exec

C/EXEC SQL
C+ DECLARE A1 CURSOR FOR STMT
C/END-EXEC

This will allow you to build the a variable with your criteria and execute
it on the fly.

Russell

<<<<If you can't beat them, arrange to have them beaten. -George Carlin
>>>>


-----Original Message-----
From: owner-rpg400-l@midrange.com [mailto:owner-rpg400-l@midrange.com]On
Behalf Of Tom Tufankjian
Sent: Friday, March 31, 2000 8:54 AM
To: RPG400-L@midrange.com
Subject: Embedded SQL


I am using embedded SQL with a serial cursor using the declare, open,
fetch, close commands.  Is there a way to change the WHERE statement
<dynamically> in the rpg program?

For example, we have a report where the user can select a season or all
seasons.  If they choose a season then the WHERE clause includes the test
for a matching season.  If they choose all seasons there is no need for the
season test at all.
Here's an example:

Select one season:
   Declare c1 cursor for
     Select * from mstfil Where season = :season_in     and company =
:company_in
          Order by style

--or--  all seasons
   Declare c2 cursor for
     Select * from mstfil Where   company = :company_in



I tried using an IF statement but you have to repeat the entire select
statement and the cursor name must be different.  I'd like to keep the
cursor name the same and just change the WHERE clause on the fly.

Hope this is clearer than our company coffee.

Thanks!
Tom T
          Order by style


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