Re: EMBEDDED SQL: Optional values in where clause?

C/EXEC SQL
C+  DECLARE C1 DYNAMIC SCROLL CURSOR FOR
C+  SELECT PRFNM,PRLNM,PREN,PRTEDH,PRPLNM,PRCLN
C+  FROM   FILE
C+  WHERE  PRER = :A1ER
C+    AND  (PRL01  = :A1L01 Or :A1L01 = '     ')
C+    AND  (PRL02  = :A1L02 Or :A1L02 = '     ')
C+    AND  (PRL03  = :A1L03 Or :A1L03 = '     ')
C+    AND  (PRL04  = :A1L04 Or :A1L04 = '     ')
C+    AND  (PRSEX  = :A1SEX Or :A1SEX = ' ')
C+    AND  (PRSTA1 = :A1STA Or :A1STA = ' ')
C+    AND  (SUBSTRING(PREN,6,4) = :A1EN4 Or :A1EN4 = '    ')
C+    AND (PRFNM LIKE
C+         (CASE
C+           WHEN :FName <> ' ' THEN :FName
C+           ELSE '#$%¢#%¢#$%¢#$¢#$%¢'
C+          END)
C+       OR :FName = ' ')
C+    AND ((PRLNM LIKE
C+         (CASE
C+           WHEN :LName <> ' ' THEN :LName
C+           ELSE '#$%¢#%¢#$%¢#$¢#$%¢'
C+          END)
C+       OR :LName = ' ')
C+     OR (PRPLNM LIKE
C+         (CASE
C+           WHEN :LName <> ' ' And :A1PLNmYN = 'Y' THEN :LName
C+           ELSE '#$%¢#%¢#$%¢#$¢#$%¢'
C+          END)
C+       OR (:LName = ' ' And :A1PLNMYN = 'Y')))
C/END-EXEC

This SQL statement will select record from the file only when the condition
between the parenthesis results in true.  There are several host variables
that can be blank, if they are blank then I want that record to be return.
Anyway, I think you'll be able to figure this out.  Just ask if you need
help.

Michael Schutte
Work 614-492-7419
email  michael_schutte@xxxxxxxxxxxx


                                                                           
             "Thomas Gard"                                                 
             <thomas.gard@gmai                                             
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                                       EMBEDDED SQL: Optional values in    
             04/18/2006 08:16          where clause?                       
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I believe recently I saw a thread here or somewhere on how to deal
with optional predicates in a where clause, i.e. sometime parms will
be passed in to be used in where clause, sometime not, its possible to
set the where clause to function accordingly on what is passed in.  I
cant recall where I saw it and did not bookmark it, can anyone point
me to the thread or highlight how to do that, thanks.

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