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  1.  Home
  2. RPG400-L
  3. August 2001

RE: Recommended PTF's for Dynamic Sql in RPG?

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I stole the join straight out of the Db2 udb for as/400 sql programming
concepts on page 76.

As for trying the where clause to join the tables, that didn't solve the
problem either, it still hung on the fetch...

Inner join using JOIN syntax
To use the inner join syntax, both of the tables you are joining are listed
in the
FROM clause, along with the join condition that applies to the tables. The
join
condition is specified after the ON keyword and determines how the two
tables
are to be compared to each other to produce the join result. The condition
can be
any comparison operator; it does not need to be the equal operator. Multiple
join
conditions can be specified in the ON clause separated by the AND keyword.
Any
additional conditions that do not relate to the actual join are specified in
either the
WHERE clause or as part of the actual join in the ON clause.
SELECT EMPNO,LASTNAME,PROJNO
FROM CORPDATA.EMPLOYEE INNER JOIN CORPDATA.PROJECT
ON EMPNO =RESPEMP
WHERE LASTNAME >'S'

(c)ibm



> -----Original Message-----
> From: Bob Cozzi (RPGIV) [SMTP:cozzi@rpgiv.com]
> Sent: Wednesday, August 29, 2001 2:51 PM
> To:   rpg400-l@midrange.com
> Subject:      RE: Recommended PTF's for Dynamic Sql in RPG?
>
> You have a JOIN keyword in there... we used to have to use the WHERE
> clause to do joining, did that change while I was sleeping? I know 3rd
> party SQL products, such as SEQUEL.
>
> Bob Cozzi
> cozzi@rpgiv.com
> Visit the new on-line iSeries Forums at: http://www.rpgiv.com/forum
>
> > -----Original Message-----
> > From: rpg400-l-admin@midrange.com [mailto:rpg400-l-admin@midrange.com]
> On
> > Behalf Of Hatzenbeler, Tim
> > Sent: Wednesday, August 29, 2001 3:42 PM
> > To: 'rpg400-l@midrange.com'
> > Subject: RE: Recommended PTF's for Dynamic Sql in RPG?
> >
> > This message is in MIME format. Since your mail reader does not
> understand
> > this format, some or all of this message may not be legible.
> > --
> > [ Picked text/plain from multipart/alternative ]
> > And after some repeated testing, the dynamic sql works as long as my
> where
> > clause only looks at table a, but the moment I tell it to do a where
> on
> > table B also, thats when it locks up.. But if I do a debug, and copy
> the sql
> > expression and use it in ops nav, it works great... even with the
> where
> > clause on table B.
> >
> > tim
> >
> > I'm going to look into my :into part of the fetch, and see what
> happens if I
> > internally define those fields instead of externally defining them
> from the
> > database file...
> >
> > > -----Original Message-----
> > > From:     Hatzenbeler, Tim [SMTP:thatzenbeler@clinitech.net]
> > > Sent:     Wednesday, August 29, 2001 1:20 PM
> > > To:       'rpg400-l@midrange.com'
> > > Subject:  RE: Recommended PTF's for Dynamic Sql in RPG?
> > >
> > > This message is in MIME format. Since your mail reader does not
> understand
> > > this format, some or all of this message may not be legible.
> > > --
> > > [ Picked text/plain from multipart/alternative ]
> > > The weird part is this... If I don't declare dynamicly, it works
> just
> > > fine...  So my datastructures that I have should be ok...
> > >
> > > but i'm still debugging and trying different things, to hopefully
> narrow
> > > down where the problem is...
> > >
> > > tim
> > >
> code
> > > > > on table B.
> > > > > > >
> > > > > > > This works fine from the command link, and also as a
> declared
> > > > > > > statement with
> > > > > > > the fields hardcoded..
> > > > > > >
> > > > > > > This is the declared version that did work...
> > > > > > >
> > > > > > > c*exec sql
> > > > > > > c* declare  c1 cursor for
> > > > > > > c*      select *
> > > > > > > c*
> > > > > > > c*      from (prdjrnusg a join jpldcusgsm b on
> > > > > > > c*              a.pjstr# = b.jpstr#)
> > > > > > > c*
> > > > > > > c*      where (a.pjhdat between 37110 and 37115) and
> > > > > > > c*      a.pjprod in ('1804','1310','2153') and
> > > > > > > c*      b.rddid = 'LAB'
> > > > > > > c*end-exec
> > > > > > >
> > > > > > > And this is the one that doesn't... I took out all the
> variables,
> > > to
> > > > > > test
> > > > > > > this...
> > > > > > >
> > > > > > > And it's very likely (probable) that the reason it's not
> working,
> > > > > > > is because
> > > > > > > I might have a coding error, so I'm including most of the
> relavant
> > > > > > parts..
> > > > > > >
> > > > > > > Dprdjrnusg      E DS                  extname(PRDJRNUSG) inz
> > > > > > > d                                     prefix(a_)
> > > > > > > Djpldcusgsm     E DS                  extname(jpldcusgsm)
> inz
> > > > > > > d                                     prefix(b_)
> > > > > > >
> > > > > > > d sql             s           1000    varying
> > > > > > >
> > > > > > > c/exec sql
> > > > > > > c+ declare  c1 cursor for DynSqlStmt
> > > > > > > c/end-exec
> > > > > > >
> > > > > > > c                  eval      sql=
> > > > > > > c                            'Select * ' +
> > > > > > > c                            'From (prdjrnusg  a  JOIN '+
> > > > > > > c                                  'jpldcusgsm b  '+
> > > > > > > c                                  'ON a.pjstr# = b.jpstr#)
> '+
> > > > > > > c                            'WHERE (a.pjhdat between
> 37110'+
> > > > > > > c                            ' AND 37115) ' +
> > > > > > > c                            'and a.pjprod in '  +
> > > > > > > c                            '(''1804'',''1310'',''2153'')'
> +
> > > > > > > c                            ' and b.rddid = ''LAB'' '
> > > > > > > c/exec sql
> > > > > > > c+ Prepare DynSqlStmt from :sql
> > > > > > > c/end-exec
> > > > > > >
> > > > > > > c/EXEC SQL   OPEN C1
> > > > > > > c/end-exec
> > > > > > >
> > > > > > > c                   dou       Done
> > > > > > > c/EXEC SQL
> > > > > > > c+ FETCH next from c1 INTO :prdjrnusg, :jpldcusgsm
> > > > > > > c/END-EXEC
> > > > > > >
> > > > > > > c                   if        sqlcod <> 0
> > > > > > > c                   leave
> > > > > > > c                   endif
> > > > > > >
> > > > > > >
> > > > > > >
> > > > > > > Below was the orginal non hardcoded version...
> > > > > > > c*                  eval      sql=
> > > > > > > c*                            'Select * ' +
> > > > > > > c*                            'From (PrdJrnUsg  a  JOIN '+
> > > > > > > c*                                  'JPLDCusgsm b  '+
> > > > > > > c*                                  'ON a.pjstr# = b.jpstr#)
> '+
> > > > > > >
> > > > > > > c*                            'WHERE (a.pjhdat between '+
> > > > > > > c*
> %editc(startdateh:'Z') +
> > > > > > > c*                            ' AND ' +
> > > > > > > c*                                    %editc(EndDateH:'Z') +
> ') '+
> > > > > > >
> > > > > > > c*                  if        %trim(dspwhere) <> *blanks
> > > > > > > c*                  eval      sql = sql + 'AND
> '+%trim(dspwhere)
> > > > > > > c*                  endif
> > > > > > >
> > > > > > > Thanks, tim
> > > > > > > _______________________________________________
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