Upload Tab delimited file from application server into ABAP internal table

*&---------------------------------------------------------------------*
*& Report  ZUPLOADTAB                                                  *
*&                                                                     *
*&---------------------------------------------------------------------*
*& Example of Uploading tab delimited file                             *
*&                                                                     *
*&---------------------------------------------------------------------*
REPORT  zuploadtab                    .

PARAMETERS: p_infile  LIKE rlgrap-filename
                        OBLIGATORY DEFAULT  '/usr/sap/'..

DATA: ld_file LIKE rlgrap-filename.

*Internal tabe to store upload data
TYPES: BEGIN OF t_record,
    name1 like pa0002-VORNA,
    name2 like pa0002-name2,
    age   type i,
    END OF t_record.
DATA: it_record TYPE STANDARD TABLE OF t_record INITIAL SIZE 0,
      wa_record TYPE t_record.

*Text version of data table
TYPES: begin of t_uploadtxt,
  name1(10) type c,
  name2(15) type c,
  age(5)  type c,
 end of t_uploadtxt.
DATA: wa_uploadtxt TYPE t_uploadtxt.

*String value to data in initially.
DATA: wa_string(255) type c.

constants: con_tab TYPE x VALUE '09'.

*If you have Unicode check active in program attributes then you will
*need to declare constants as follows:

*class cl_abap_char_utilities definition load.
*constants:
*    con_tab  type c value cl_abap_char_utilities=>HORIZONTAL_TAB.



************************************************************************
*START-OF-SELECTION
START-OF-SELECTION.
ld_file = p_infile.
OPEN DATASET ld_file FOR INPUT IN TEXT MODE ENCODING DEFAULT.
IF sy-subrc NE 0.
ELSE.
  DO.
    CLEAR: wa_string, wa_uploadtxt.
    READ DATASET ld_file INTO wa_string.
    IF sy-subrc NE 0.
      EXIT.
    ELSE.
      SPLIT wa_string AT con_tab INTO wa_uploadtxt-name1
                                      wa_uploadtxt-name2
                                      wa_uploadtxt-age.
      MOVE-CORRESPONDING wa_uploadtxt TO wa_upload.
      APPEND wa_upload TO it_record.
    ENDIF.
  ENDDO.
  CLOSE DATASET ld_file.
ENDIF.


************************************************************************
*END-OF-SELECTION
END-OF-SELECTION.
*!! Text data is now contained within the internal table IT_RECORD

* Display report data for illustration purposes
  loop at it_record into wa_record.
    write:/     sy-vline,
           (10) wa_record-name1, sy-vline,
           (10) wa_record-name2, sy-vline,
           (10) wa_record-age, sy-vline.
  endloop.