Error in reading -help me pls

Question

Hi Experts
One of my ztable, am trying to read data using 'N' transaction,
the value exists but its not reading.
but when i add '*' (star) with the end of the data only, it reads correctly.
Whats the reason for not reading the data when i give exactly.
Wheather data type could be the problem.
SELECT a~ZTNAM
              a~CTLNO
              a~VBELN
              b~CTLNO
              b~PRDAT
              INTO CORRESPONDING FIELDS OF TABLE ITAB
              FROM ZLIST as a
              INNER JOIN ZCTLK as b
              ON aCTLNO = bCTLNO
              WHERE a~ZTNAM = ZTEST.
it returns sy-subrc = 4, even data available in this condition.
Thanks in advance.
Regards
Rajaram

Answer 1

Please find my full code and do needful.
REPORT  ZTEST_REPORT.
TABLES : ZLIST,ZCTLK,vbrk.
TYPE-POOLS : SLIS.
DATA : BEGIN OF ITAB OCCURS 0,
       PRDAT LIKE ZCTLK-PRDAT,
       CTLNO LIKE ZCTLK-CTLNO,
       CTLKNO LIKE ZLIST-CTLNO,
       ZTNAM LIKE ZLIST-ZTNAM,
       VBELN LIKE ZLIST-VBELN,
       END OF ITAB.
DATA : i_repid TYPE sy-repid,
       gs_layout   TYPE slis_layout_alv,
       gt_fcat     TYPE slis_t_fieldcat_alv,
       gt_user_command  TYPE   slis_formname       VALUE 'USER_COMMAND',
       gs_variant LIKE disvariant,
       ls_fcat LIKE LINE OF gt_fcat.
       SELECTION-SCREEN BEGIN OF BLOCK B1 WITH FRAME TITLE TEXT-001.
       SELECT-OPTIONS : ZDATE FOR vbrk-FKDAT,
                        ZTEST FOR ZLIST-ZTNAM.
       SELECTION-SCREEN END OF BLOCK B1.
       SELECT a~ZTNAM
              a~CTLNO
              a~VBELN
              b~CTLNO
              b~PRDAT
              INTO CORRESPONDING FIELDS OF TABLE ITAB
              FROM ZLIST as a
              INNER JOIN ZCTLK as b
              ON aCTLNO = bCTLNO
              WHERE a~ZTNAM = ZTEST.
PERFORM fieldcat.
i_repid = sy-repid.
CALL FUNCTION 'REUSE_ALV_GRID_DISPLAY'
  EXPORTING
    i_callback_program      = i_repid
   i_callback_user_command = 'USER_COMMAND'
    is_layout               = gs_layout
    it_fieldcat             = gt_fcat
    i_save                  = 'A'
   is_variant              = gs_variant
  TABLES
    t_outtab                = itab
  EXCEPTIONS
    program_error           = 1
    OTHERS                  = 2.
IF sy-subrc <> 0.
  MESSAGE ID sy-msgid TYPE sy-msgty NUMBER sy-msgno
          WITH sy-msgv1 sy-msgv2 sy-msgv3 sy-msgv4.
ENDIF.
FORM fieldcat .
  MOVE sy-repid TO i_repid.
  ls_fcat-tabname      = 'ITAB'.
  ls_fcat-decimals_out = 2.
  ls_fcat-fieldname = 'PRDAT'.
  ls_fcat-seltext_l = 'Report Date'.
  ls_fcat-seltext_m = 'Report Date'.
  ls_fcat-seltext_s = 'Report Date'.
  ls_fcat-outputlen = 10.
  APPEND ls_fcat TO gt_fcat.
  ls_fcat-fieldname = 'ZTNAM'.
  ls_fcat-seltext_l = 'Test'.
  ls_fcat-seltext_m = 'Test'.
  ls_fcat-seltext_s = 'Test'.
  ls_fcat-outputlen = 15.
  APPEND ls_fcat TO gt_fcat.
  ls_fcat-fieldname = 'CTLNO'.
  ls_fcat-seltext_l = 'Test No'.
  ls_fcat-seltext_m = 'Test No'.
  ls_fcat-seltext_s = 'Test No'.
  ls_fcat-outputlen = 15.
  APPEND ls_fcat TO gt_fcat.
  ls_fcat-fieldname = 'VBELN'.
  ls_fcat-seltext_l = 'Sales Order'.
  ls_fcat-seltext_m = 'Sales Order'.
  ls_fcat-seltext_s = 'Sales Order'.
  ls_fcat-outputlen = 10.
  APPEND ls_fcat TO gt_fcat.
ENDFORM.