RE: SQL date comparison - a better way?

Here you go. We place all of our UDFs in a service program called SQLUDF and
then register them through SQL using a CL program.

Here are the two we use to create dates out of numeric fields (depending on
whether you want an 8,0 value or an actual date value):

*******************************
     D CrtDat8         PR             8p 0                           
     D  PmCent                        1  0                           
     D  PmDate6                       6  0                           
                                                                     
     D CrtDat          PR              d                             
     D  PmCent                        1  0                           
     D  PmDate6                       6  0                           
                                                                     
     P CrtDat8         B                   Export                    
                                                                     
     D CrtDat8         PI             8p 0                           
     D  PmCent                        1  0                           
     D  PmDate6                       6  0                           
                                                                     
     D WkDat7          s              7p 0                           
     D WkISODate       s               d   datfmt(*ISO)              
     D RtnDat8         s              8p 0 Inz                       
                                                                     
     C                   Move      PmDate6       WkDat7              
     C                   MoveL     PmCent        WkDat7              
                                                                     
     C                   Monitor                                     
     C     *CYMD         Move      WkDat7        WkISODate           
     C                   Move      WkISODate     RtnDat8             
 

     C                   On-Error  00112
invalid date/timstmp        
     C                   EndMon

 

     C                   Return    RtnDat8

     P CrtDat8         E

 

      *====================================================================

     P CrtDat          B                   Export

 

     D CrtDat          PI              d

     D  PmCent                        1  0

     D  PmDate6                       6  0

 

     D WkDat7          s              7p 0

     D Today           s               d   inz(*job)

     D WkISODate       s               d   inz

 

     C                   Move      PmDate6       WkDat7

     C                   MoveL     PmCent        WkDat7

 

     C                   Monitor

     C     *CYMD         Test(d e)               WkDat7

     C     *CYMD         Move      WkDat7        WkISODate

 

     C                   On-Error  00112
invalid date/timstmp
     C                   EndMon

 

     C                   Return    WkISODate

     P CrtDat          E

*******************************
 SQLUDFCRT:  PGM                                           
             RUNSQL     REQUEST('DROP FUNCTION CRTDAT')    
             RUNSQL     REQUEST('DROP FUNCTION CRTDAT8')   

             RUNSQL     REQUEST('CREATE FUNCTION CRTDAT8 (DEC (1,0), +  
                          DEC (6,0)) RETURNS  DEC (8,0) LANGUAGE +      
                          RPGLE DETERMINISTIC NO SQL RETURNS  NULL  +   
                          ON NULL INPUT NO EXTERNAL ACTION ALLOW +      
                          PARALLEL  SIMPLE CALL EXTERNAL NAME +         
                          ''PRODLIB/SQLUDF(CRTDAT8)''')                  
                                                                        
             RUNSQL     REQUEST('CREATE FUNCTION CRTDAT  (DEC (1,0), +  
                          DEC (6,0) ) RETURNS  DATE +                   
                          LANGUAGE RPGLE +                              
                          NOT DETERMINISTIC +                           
                          NO SQL +                                      
                          RETURNS  NULL ON NULL INPUT +                 
                          NO EXTERNAL ACTION +                          
                          DISALLOW PARALLEL +                           
                          SIMPLE CALL EXTERNAL NAME +                   
                          ''PRODLIB/SQLUDF(CRTDAT)''')                   
             ENDPGM

Kevin R Mohondro
Programmer/Analyst
Ashworth, Inc.

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