ABAP Select data from SAP table RFKORD_S_ITEM_ALW into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP RFKORD_S_ITEM_ALW 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 RFKORD_S_ITEM_ALW. 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 RFKORD_S_ITEM_ALW 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_RFKORD_S_ITEM_ALW TYPE STANDARD TABLE OF RFKORD_S_ITEM_ALW,
      WA_RFKORD_S_ITEM_ALW TYPE RFKORD_S_ITEM_ALW,
      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: <RFKORD_S_ITEM_ALW> TYPE RFKORD_S_ITEM_ALW.

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM RFKORD_S_ITEM_ALW
*  INTO TABLE @DATA(IT_RFKORD_S_ITEM_ALW2).
*--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_RFKORD_S_ITEM_ALW INDEX 1 INTO DATA(WA_RFKORD_S_ITEM_ALW2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<RFKORD_S_ITEM_ALW>-WAERS_ALW = 1.
<RFKORD_S_ITEM_ALW>-HWAER_ALW = 1.
<RFKORD_S_ITEM_ALW>-PSWSL_ALW = 1.
<RFKORD_S_ITEM_ALW>-WRSHB_ALW = 1.
<RFKORD_S_ITEM_ALW>-DMSHB_ALW = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_RFKORD_S_ITEM_ALW-WSSHB_ALW, sy-vline,
  WA_RFKORD_S_ITEM_ALW-SKSHB_ALW, sy-vline,
  WA_RFKORD_S_ITEM_ALW-WSSHV_ALW, sy-vline,
  WA_RFKORD_S_ITEM_ALW-SKSHV_ALW, sy-vline,
  WA_RFKORD_S_ITEM_ALW-WRSHN_ALW, sy-vline,
  WA_RFKORD_S_ITEM_ALW-PSSHB_ALW, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_RFKORD_S_ITEM_ALW 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_RFKORD_S_ITEM_ALW 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_RFKORD_S_ITEM_ALW INTO WA_RFKORD_S_ITEM_ALW.


*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 AC132, internal->external for field WRSHB_ALW
CALL FUNCTION 'CONVERSION_EXIT_AC132_OUTPUT'
  EXPORTING
    input =                      WA_RFKORD_S_ITEM_ALW-WRSHB_ALW
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RFKORD_S_ITEM_ALW-WRSHB_ALW.
WRITE:/ 'New Value:', ld_input.

*Conversion exit AC132, internal->external for field DMSHB_ALW
CALL FUNCTION 'CONVERSION_EXIT_AC132_OUTPUT'
  EXPORTING
    input =                      WA_RFKORD_S_ITEM_ALW-DMSHB_ALW
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RFKORD_S_ITEM_ALW-DMSHB_ALW.
WRITE:/ 'New Value:', ld_input.

*Conversion exit AC132, internal->external for field WSSHB_ALW
CALL FUNCTION 'CONVERSION_EXIT_AC132_OUTPUT'
  EXPORTING
    input =                      WA_RFKORD_S_ITEM_ALW-WSSHB_ALW
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RFKORD_S_ITEM_ALW-WSSHB_ALW.
WRITE:/ 'New Value:', ld_input.

*Conversion exit AC132, internal->external for field SKSHB_ALW
CALL FUNCTION 'CONVERSION_EXIT_AC132_OUTPUT'
  EXPORTING
    input =                      WA_RFKORD_S_ITEM_ALW-SKSHB_ALW
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RFKORD_S_ITEM_ALW-SKSHB_ALW.
WRITE:/ 'New Value:', ld_input.

*Conversion exit AC132, internal->external for field WSSHV_ALW
CALL FUNCTION 'CONVERSION_EXIT_AC132_OUTPUT'
  EXPORTING
    input =                      WA_RFKORD_S_ITEM_ALW-WSSHV_ALW
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RFKORD_S_ITEM_ALW-WSSHV_ALW.
WRITE:/ 'New Value:', ld_input.

*Conversion exit AC132, internal->external for field SKSHV_ALW
CALL FUNCTION 'CONVERSION_EXIT_AC132_OUTPUT'
  EXPORTING
    input =                      WA_RFKORD_S_ITEM_ALW-SKSHV_ALW
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RFKORD_S_ITEM_ALW-SKSHV_ALW.
WRITE:/ 'New Value:', ld_input.

*Conversion exit AC132, internal->external for field WRSHN_ALW
CALL FUNCTION 'CONVERSION_EXIT_AC132_OUTPUT'
  EXPORTING
    input =                      WA_RFKORD_S_ITEM_ALW-WRSHN_ALW
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RFKORD_S_ITEM_ALW-WRSHN_ALW.
WRITE:/ 'New Value:', ld_input.

*Conversion exit AC132, internal->external for field PSSHB_ALW
CALL FUNCTION 'CONVERSION_EXIT_AC132_OUTPUT'
  EXPORTING
    input =                      WA_RFKORD_S_ITEM_ALW-PSSHB_ALW
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RFKORD_S_ITEM_ALW-PSSHB_ALW.
WRITE:/ 'New Value:', ld_input.

*Conversion exit AC152, internal->external for field ZALBT_ALW
CALL FUNCTION 'CONVERSION_EXIT_AC152_OUTPUT'
  EXPORTING
    input =                      WA_RFKORD_S_ITEM_ALW-ZALBT_ALW
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RFKORD_S_ITEM_ALW-ZALBT_ALW.
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_RFKORD_S_ITEM_ALW_STR, 
WAERS_ALW TYPE STRING,
HWAER_ALW TYPE STRING,
PSWSL_ALW TYPE STRING,
WRSHB_ALW TYPE STRING,
DMSHB_ALW TYPE STRING,
WSSHB_ALW TYPE STRING,
SKSHB_ALW TYPE STRING,
WSSHV_ALW TYPE STRING,
SKSHV_ALW TYPE STRING,
WRSHN_ALW TYPE STRING,
PSSHB_ALW TYPE STRING,
ZALBT_ALW TYPE STRING,END OF T_EKKO_STR.
DATA: WA_RFKORD_S_ITEM_ALW_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_RFKORD_S_ITEM_ALW_STR-WAERS_ALW sy-vline 
WA_RFKORD_S_ITEM_ALW_STR-HWAER_ALW sy-vline 
WA_RFKORD_S_ITEM_ALW_STR-PSWSL_ALW sy-vline 
WA_RFKORD_S_ITEM_ALW_STR-WRSHB_ALW sy-vline 
WA_RFKORD_S_ITEM_ALW_STR-DMSHB_ALW sy-vline 
WA_RFKORD_S_ITEM_ALW_STR-WSSHB_ALW sy-vline 
WA_RFKORD_S_ITEM_ALW_STR-SKSHB_ALW sy-vline 
WA_RFKORD_S_ITEM_ALW_STR-WSSHV_ALW sy-vline 
WA_RFKORD_S_ITEM_ALW_STR-SKSHV_ALW sy-vline 
WA_RFKORD_S_ITEM_ALW_STR-WRSHN_ALW sy-vline 
WA_RFKORD_S_ITEM_ALW_STR-PSSHB_ALW sy-vline 
WA_RFKORD_S_ITEM_ALW_STR-ZALBT_ALW sy-vline      INTO ld_text SEPARATED BY SPACE.

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