Problem w/SQL

Could someone explain to me why this compiles?

     DdsData           ds            83    occurs(10000) based(p_data)
     d ds_cusno                       8  0 overlay(dsData:*next)
     d ds_cusnn                      35    overlay(dsData:*next)
     D ds_invdat                      8  0 overlay(dsData:*next)
     D ds_actDte                      8  0 overlay(dsData:*next)
     d ds_ordno                       6  0 overlay(dsData:*next)
     D ds_ordlv                       2  0 overlay(dsData:*next)
     D ds_invno                       6  0 overlay(dsData:*next)
     D ds_msrshp                     10  3 overlay(dsData:*next)

     PgetMTDDBI        b                   export
     DgetMTDDBI        PI              *
     D numRecs                        5i 0
     D itnbr                         15    const
     d fclyr                          4  0 const
     d fclmo                          2  0 const

     Dsize             S             10i 0
     Dx                S              5i 0

     C/exec sql
     c+ SELECT DISTINCT COUNT(*) INTO :numRecs
     c+  FROM Oedhst
     c+  WHERE cuscl NOT IN ('ZC','ZH')
     C+  AND house NOT IN ('8','Y')
     C+  AND itnbr = :itnbr
     C+  AND fclyr = :fclyr
     C+  AND fclmo = :fclmo
     c/end-exec

     c                   if        numRecs = 0
     C                   return    *null
     c                   endif

     C                   eval      size = %size(dsData) * numRecs
     C                   alloc     size          p_data

     c/exec sql
     c+ DECLARE c CURSOR FOR
     C+  SELECT b.cusno,b.cusnm,a.invdat,b.actdte,
     c+         b.ordno,b.ordlv,b.invno,a.msrshp
     c+  FROM Oedhst a JOIN Oehhst b
     c+  ON a.ordno = b.ordno
     c+  AND a.ordlv = b.ordlv
     C+  WHERE a.fclyr = :fclyr
     C+  AND   a.fclmo = :fclmo
     c+  AND   a.itnbr = :itnbr
     c+  AND   b.cuscl NOT IN ('ZH','ZC')
     c+  AND   a.house NOT IN ('8','Y')
     C+  ORDER BY  invdat,ordno,ordlv
     c/end-exec

     c/exec sql
     c+ OPEN c
     c/end-exec

     c                   for       x = 1 to numRecs

     c     x             occur     dsData

     c/exec sql
     c+ FETCH c  into :dsData
     c/end-exec

     c                   endfor

     c/exec sql
     c+ CLOSE c
     c/end-exec

     c                   return    p_data
     P                 E


And This doesn't:

     DdataDS           DS            23    occurs(15)
     D dsItnbr                       15    overlay(dataDS:*next)
     D dsWkctr                        5    overlay(dataDS:*next)
     D dsCpfSeq                       3  0 overlay(dataDS:*next) INZ

     PbuildCursor      b
     DbuildCursor      PI

     C/exec sql
     C+ DECLARE c1 CURSOR FOR
     C+  SELECT DISTINCT itnbr,wkctr,cpfseq
     C+   FROM Cpfpf
     C/end-exec

     C/exec sql
     C+ OPEN c1
     C/end-exec

     P                 E

     PloadSubfile      B
     DloadSubfile      PI

     Dx                S             10i 0

     C/exec sql
     C+ FETCH FROM c1 FOR 15 ROWS INTO :datads
     C/end-exec

      ...

Thanks,

Mark

Mark D. Walter
Senior Programmer/Analyst
CCX, Inc.
mwalter@xxxxxxxxxx
http://www.ccxinc.com