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And the fetch?
How can we create an dynamic fetch ?
e.g.
like building an expression:
eval dfetch=':var1, :var2, ...'
and then
C/EXEC SQL
C+ FETCH NEXT FROM DYNFIL USING DESCRIPTOR :dfetch
Regards
Joao
-----Original Message-----
From: groyle@cott.com [mailto:groyle@cott.com]
Sent: Terça-feira, 14 de Novembro de 2000 20:33
To: RPG400-L@midrange.com
Subject: re: Embedded and dynamic SQLRPG
It looks to me like you're doing the declare before the prepare.
Here's an example that we use (in RPG IV) that does exactly what you want.
We
let the user specify a Sort Order and create the ORDER BY accordingly.
D Dyn_Sel S 796A
D Dyn_Sela S 796A
C Eval Dyn_Sela = 'SELECT LHID, LHYEAR, ' +
C 'LHPERD, LHJNEN, LHJNLN, ' +
C 'LHIAN, LHDRAM, LHCRAM, ' +
C '(LHDRAM - LHCRAM), LHLDES, ' +
C Sort1+', ' +
C Sort2+', ' +
C Sort3 +
C ' FROM GLH ' +
C 'LEFT OUTER JOIN GLA ' +
C 'ON (LHJNEN = LAJNEN AND LHJNLN = LAJNLN) '+
C 'WHERE (LHLDGR ='+''''+LEDGER +
C ''''+' AND LHBOOK = '+'''' +
C BOOK+''''+' AND ' +
C '(LHYEAR = '+%CHAR(FYEAR)+') AND ' +
C '(LHPERD = '+%CHAR(FPERD)+') AND ' +
C 'LHJNEN BETWEEN '+''''+JRNENFM+'''' +
C ' AND'+''''+JRNENTO+''''+' AND ' +
C 'LHID = '+LH+' AND ' +
C 'LHIAN = '+ %CHAR(IAN)+' AND ' +
C 'LHLSTS = 3) '
C* ----
C If Selection = *ON AND Sort = *OFF
C Eval Dyn_Sel = Dyn_Sela +
C 'ORDER BY LHPERD, LHYEAR, LHLDES ' +
C 'FOR READ ONLY'
C Else
C*
C If Selection = *ON AND Sort = *ON
C Eval Dyn_Sel = Dyn_Sela +
C 'ORDER BY LHPERD, LHYEAR, LHLDES, ' +
C Sort1+', '+Sort2+', '+Sort3 +
C 'FOR READ ONLY'
C Else
C If Sort = *ON AND Selection = *OFF
C Eval Dyn_Sel = Dyn_Sela +
C 'GROUP BY LHPERD, LHYEAR, ' +
C Sort1a+', '+Sort2a+', ' +
C
Else
C Eval Dyn_Sel = Dyn_Sela
+
C 'ORDER BY LHPERD, LHYEAR '
+
C 'FOR READ
ONLY'
C
EndIf
C
EndIf
C
EndIf
C/EXEC SQL
C+ PREPARE Dyn_Select FROM :Dyn_Sel
C/END-EXEC
C*
C/EXEC SQL DECLARE TR_DETAIL CURSOR FOR Dyn_Select
C/END-EXEC
C*
These are just code snippets taken (out of context) from a working program
but they wil;l give you the idea.
Gord Royle
Hope it helps
---------- Original Text ----------
From: Jo~o Pereira <JPereira@Auto-Sueco.PT>, on 11/14/00 2:27 PM:
> Please look at the following RPG.
>
> 0004.00 C *ENTRY PLIST
> 0004.01 C PARM PRI 6
>
>
> 0005.00 C/EXEC SQL
> 0005.01 C+ DECLARE DYNFIL SCROLL CURSOR FOR DYNSTM
> 0005.02 C/END-EXEC
>
> 0011.00 C MOVEL'SELECT' WWHERE256 P
> 0012.00 C CAT '* FROM':1 WWHERE
> 0013.00 C CAT 'MCLI':1 WWHERE
> 0014.00 C CAT 'WHERE':1 WWHERE
> 0014.01 C CAT '(':1 WWHERE
> 0015.00 C CAT 'CFNUM':0 WWHERE
> 0016.00 C CAT '>=':0 WWHERE
> 0017.00 C CAT PRI:0 WWHERE
> 0022.00 C CAT ')':0 WWHERE
>
> 0030.00 C/EXEC SQL
> 0031.00 C+ PREPARE DYNSTM FROM :WWHERE
> 0032.00 C/END-EXEC
> 0033.00 *
> 0034.00 C/EXEC SQL
> 0035.00 C+ OPEN DYNFIL USING :WWHERE
> 0036.00 C/END-EXEC
> 0037.00 *
> 0038.00 * LIST FILE
> 0039.00 B1 C SQLCOD DOWNE100
> 0040.00 * read forward
> 0041.00 *
> 0042.00 C/EXEC SQL
> 0043.00 C+ FETCH NEXT FROM DYNFIL
> 0045.00 C/END-EXEC
> 0046.00 *
> 0047.00 B2 C SQLCOD IFEQ 100
>
> 0048.00 C LEAVE
> 0049.00 E2 C END
> 0050.00 *
> 0055.00 C EXCPTDET
> 0056.00 *
> 0057.00 E1 C ENDDO
>
> 0059.00 C/EXEC SQL
> 0060.00 C+ CLOSE DYNFIL
> 0061.00 C/END-EXEC
> 0062.00 *
> 0063.00 OQSYSPRT E 1 DET
> 0064.00 O CFNUM Z 7
> 0064.01 O ' '
> 0065.00 O CFNOM
>
>
>
> As this is a dynamic SQL, how can I retrieve the fields of my file (MCLI)
> in the fetch?
>
> I'd like to give the users the possibility of selecting the fields they
> want.
>
>
> Regards
> Joao Pereira
>
>
>
>
>
>
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