ABAP Select data from SAP table REXCSCCH_TAPE_FILE into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP REXCSCCH_TAPE_FILE table and store it within an internal table, including using the newer @DATA inline declaration methods. It also shows you various ways to process this data using ABAP work area, inline declaration or field symbols including executing all the relevant CONVERSION_EXIT routines specific to REXCSCCH_TAPE_FILE. See here for more generic Select statement tips.

Sometimes data within SAP is stored within the database table in a different format to what it is displayed to the user. These input/output conversation FM routines are what translates the data between the two formats.

There is also a full declaration of the REXCSCCH_TAPE_FILE table where each field has a char/string type for you to simply copy and paste. This allows you to use processing that is only available to these field types such as the CONCATENATE statement.

DATA: IT_REXCSCCH_TAPE_FILE TYPE STANDARD TABLE OF REXCSCCH_TAPE_FILE,
      WA_REXCSCCH_TAPE_FILE TYPE REXCSCCH_TAPE_FILE,
      GD_STR TYPE STRING.

DATA: lo_typedescr type REF TO cl_abap_typedescr.
DATA: lv_fieldname type fieldname.

FIELD-SYMBOLS: <FIELD> TYPE any.
FIELD-SYMBOLS: <REXCSCCH_TAPE_FILE> TYPE REXCSCCH_TAPE_FILE.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_REXCSCCH_TAPE_FILE.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM REXCSCCH_TAPE_FILE
  INTO TABLE IT_REXCSCCH_TAPE_FILE.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM REXCSCCH_TAPE_FILE
*  INTO TABLE @DATA(IT_REXCSCCH_TAPE_FILE2).
*--Further methods of using ABAP code to  select data from SAP database tables

*You can also declare the header/work area using the in-line DATA declaration method
READ TABLE IT_REXCSCCH_TAPE_FILE INDEX 1 INTO DATA(WA_REXCSCCH_TAPE_FILE2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_REXCSCCH_TAPE_FILE ASSIGNING <REXCSCCH_TAPE_FILE>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<REXCSCCH_TAPE_FILE>-TAPEGUID = 1.
<REXCSCCH_TAPE_FILE>-LIFNR = 1.
<REXCSCCH_TAPE_FILE>-MPFROM = 1.
<REXCSCCH_TAPE_FILE>-MPTO = 1.
<REXCSCCH_TAPE_FILE>-MBUKRS = 1.

ENDLOOP.

LOOP AT IT_REXCSCCH_TAPE_FILE INTO WA_REXCSCCH_TAPE_FILE.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_REXCSCCH_TAPE_FILE-MSWENR, sy-vline,
  WA_REXCSCCH_TAPE_FILE-MSNKSL, sy-vline,
  WA_REXCSCCH_TAPE_FILE-MSEMPSL, sy-vline,
  WA_REXCSCCH_TAPE_FILE-MPROZ, sy-vline,
  WA_REXCSCCH_TAPE_FILE-SWENR, sy-vline,
  WA_REXCSCCH_TAPE_FILE-SNKSL, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_REXCSCCH_TAPE_FILE you want to display...

  WRITE:/ sy-uline.
* Aternatively use generic code to Write field values (and NAME) to screen report
  DO.
    ASSIGN COMPONENT sy-index OF STRUCTURE wa_REXCSCCH_TAPE_FILE TO <field>.
    IF sy-subrc <> 0. EXIT. ENDIF.
    WRITE:/ 'Field Value', <field>, sy-vline.
    gd_str = <field> .
    lo_typedescr ?= CL_ABAP_DATADESCR=>DESCRIBE_BY_DATA( <field> ).
    lv_fieldname = lo_typedescr->GET_RELATIVE_NAME( ).
    WRITE:/ 'Field Name', lv_fieldname.
  ENDDO.

  
*Redo loop but convert all fields from internal to out value  
LOOP AT IT_REXCSCCH_TAPE_FILE INTO WA_REXCSCCH_TAPE_FILE.


*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Convert all fields to display/output versions using conversion routines
  PERFORM convert_all_field_values CHANGING wa_EKKO.
	 
ENDLOOP.

  
*&---------------------------------------------------------------------*
*& Form convert_all_field_values
*&---------------------------------------------------------------------*
FORM convert_all_field_values CHANGING p_EKKO LIKE wa_EKKO.
DATA: ld_input(1000) TYPE c, ld_output(1000) TYPE C.

*Conversion exit ALPHA, internal->external for field LIFNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_REXCSCCH_TAPE_FILE-LIFNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_REXCSCCH_TAPE_FILE-LIFNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit REDAT, internal->external for field MPTO
CALL FUNCTION 'CONVERSION_EXIT_REDAT_OUTPUT'
  EXPORTING
    input =                      WA_REXCSCCH_TAPE_FILE-MPTO
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_REXCSCCH_TAPE_FILE-MPTO.
WRITE:/ 'New Value:', ld_input.

*Conversion exit SWENR, internal->external for field MSWENR
CALL FUNCTION 'CONVERSION_EXIT_SWENR_OUTPUT'
  EXPORTING
    input =                      WA_REXCSCCH_TAPE_FILE-MSWENR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_REXCSCCH_TAPE_FILE-MSWENR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field MSNKSL
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_REXCSCCH_TAPE_FILE-MSNKSL
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_REXCSCCH_TAPE_FILE-MSNKSL.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field MSEMPSL
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_REXCSCCH_TAPE_FILE-MSEMPSL
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_REXCSCCH_TAPE_FILE-MSEMPSL.
WRITE:/ 'New Value:', ld_input.

*Conversion exit SWENR, internal->external for field SWENR
CALL FUNCTION 'CONVERSION_EXIT_SWENR_OUTPUT'
  EXPORTING
    input =                      WA_REXCSCCH_TAPE_FILE-SWENR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_REXCSCCH_TAPE_FILE-SWENR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field SNKSL
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_REXCSCCH_TAPE_FILE-SNKSL
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_REXCSCCH_TAPE_FILE-SNKSL.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field SEMPSL
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_REXCSCCH_TAPE_FILE-SEMPSL
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_REXCSCCH_TAPE_FILE-SEMPSL.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field MEAS
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_REXCSCCH_TAPE_FILE-MEAS
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_REXCSCCH_TAPE_FILE-MEAS.
WRITE:/ 'New Value:', ld_input.
ENDFORM. 

*&---------------------------------------------------------------------*
*& Form process_as_string_field_values
*&---------------------------------------------------------------------*
FORM process_as_string_field_values CHANGING p_EKKO LIKE wa_EKKO.

TYPES: BEGIN OF T_REXCSCCH_TAPE_FILE_STR, 
TAPEGUID TYPE STRING,
LIFNR TYPE STRING,
MPFROM TYPE STRING,
MPTO TYPE STRING,
MBUKRS TYPE STRING,
MSWENR TYPE STRING,
MSNKSL TYPE STRING,
MSEMPSL TYPE STRING,
MPROZ TYPE STRING,
SWENR TYPE STRING,
SNKSL TYPE STRING,
SEMPSL TYPE STRING,
SHARE_PERCENT TYPE STRING,
MEAS TYPE STRING,
XMMEAS TYPE STRING,END OF T_EKKO_STR.
DATA: WA_REXCSCCH_TAPE_FILE_STR type T_EKKO_STR.

DATA: ld_text TYPE string.

LOOP AT IT_EKKO INTO WA_EKKO.
  MOVE-CORRESPONDING wa_EKKO TO WA_EKKO_STR.
  CONCATENATE: sy-vline
WA_REXCSCCH_TAPE_FILE_STR-TAPEGUID sy-vline 
WA_REXCSCCH_TAPE_FILE_STR-LIFNR sy-vline 
WA_REXCSCCH_TAPE_FILE_STR-MPFROM sy-vline 
WA_REXCSCCH_TAPE_FILE_STR-MPTO sy-vline 
WA_REXCSCCH_TAPE_FILE_STR-MBUKRS sy-vline 
WA_REXCSCCH_TAPE_FILE_STR-MSWENR sy-vline 
WA_REXCSCCH_TAPE_FILE_STR-MSNKSL sy-vline 
WA_REXCSCCH_TAPE_FILE_STR-MSEMPSL sy-vline 
WA_REXCSCCH_TAPE_FILE_STR-MPROZ sy-vline 
WA_REXCSCCH_TAPE_FILE_STR-SWENR sy-vline 
WA_REXCSCCH_TAPE_FILE_STR-SNKSL sy-vline 
WA_REXCSCCH_TAPE_FILE_STR-SEMPSL sy-vline 
WA_REXCSCCH_TAPE_FILE_STR-SHARE_PERCENT sy-vline 
WA_REXCSCCH_TAPE_FILE_STR-MEAS sy-vline 
WA_REXCSCCH_TAPE_FILE_STR-XMMEAS sy-vline      INTO ld_text SEPARATED BY SPACE.

*Add any further fields from structure WA_EKKO_STR you want to CONCATENATE...
ENDLOOP.
ENDFORM.