ABAP Select data from SAP table RCUSB into internal table

Get Example source ABAP code based on a different SAP table
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Below is a number of ABAP code snippets to demonstrate how to select data from SAP RCUSB 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 RCUSB. 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 RCUSB 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_RCUSB TYPE STANDARD TABLE OF RCUSB,
      WA_RCUSB TYPE RCUSB,
      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: <RCUSB> TYPE RCUSB.

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM RCUSB
*  INTO TABLE @DATA(IT_RCUSB2).
*--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_RCUSB INDEX 1 INTO DATA(WA_RCUSB2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<RCUSB>-MATNR = 1.
<RCUSB>-BOMOK = 1.
<RCUSB>-OBKTX = 1.
<RCUSB>-WERKS = 1.
<RCUSB>-WTEXT = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_RCUSB-STLAN, sy-vline,
  WA_RCUSB-STLAL, sy-vline,
  WA_RCUSB-POSNR, sy-vline,
  WA_RCUSB-POSTP, sy-vline,
  WA_RCUSB-OBTSP, sy-vline,
  WA_RCUSB-BOMOB, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_RCUSB 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_RCUSB 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_RCUSB INTO WA_RCUSB.


*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 MATN1, internal->external for field MATNR
CALL FUNCTION 'CONVERSION_EXIT_MATN1_OUTPUT'
  EXPORTING
    input =                      WA_RCUSB-MATNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RCUSB-MATNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit NUMCV, internal->external for field VORNR
CALL FUNCTION 'CONVERSION_EXIT_NUMCV_OUTPUT'
  EXPORTING
    input =                      WA_RCUSB-VORNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RCUSB-VORNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit NUMCV, internal->external for field UVORN
CALL FUNCTION 'CONVERSION_EXIT_NUMCV_OUTPUT'
  EXPORTING
    input =                      WA_RCUSB-UVORN
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RCUSB-UVORN.
WRITE:/ 'New Value:', ld_input.

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

*Conversion exit ALPHA, internal->external for field SRVPOS
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RCUSB-SRVPOS
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RCUSB-SRVPOS.
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_RCUSB_STR, 
MATNR TYPE STRING,
BOMOK TYPE STRING,
OBKTX TYPE STRING,
WERKS TYPE STRING,
WTEXT TYPE STRING,
STLAN TYPE STRING,
STLAL TYPE STRING,
POSNR TYPE STRING,
POSTP TYPE STRING,
OBTSP TYPE STRING,
BOMOB TYPE STRING,
KTEXT TYPE STRING,
ATNAM TYPE STRING,
ATBEZ TYPE STRING,
ATWRT TYPE STRING,
ATWTB TYPE STRING,
HEDL TYPE STRING,
VORNR TYPE STRING,
UVORN TYPE STRING,
ARBPL TYPE STRING,
PTEXT TYPE STRING,
PLNFL TYPE STRING,
FLGTEXT TYPE STRING,
PSNFH TYPE STRING,
FHMAR TYPE STRING,
FHMNR TYPE STRING,
FHKTX TYPE STRING,
LTXA1 TYPE STRING,
KNNETC TYPE STRING,
KNNETR TYPE STRING,
KNNETR_EV TYPE STRING,
KNNETR_MO TYPE STRING,
KNSCE TYPE STRING,
KNNAM TYPE STRING,
KNKTX TYPE STRING,
PLNNR TYPE STRING,
PLNAL TYPE STRING,
SPEC_NO TYPE STRING,
TXZ01 TYPE STRING,
EXTROW TYPE STRING,
SRVPOS TYPE STRING,
KTEXT1 TYPE STRING,
PROC_MODE TYPE STRING,END OF T_EKKO_STR.
DATA: WA_RCUSB_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_RCUSB_STR-MATNR sy-vline 
WA_RCUSB_STR-BOMOK sy-vline 
WA_RCUSB_STR-OBKTX sy-vline 
WA_RCUSB_STR-WERKS sy-vline 
WA_RCUSB_STR-WTEXT sy-vline 
WA_RCUSB_STR-STLAN sy-vline 
WA_RCUSB_STR-STLAL sy-vline 
WA_RCUSB_STR-POSNR sy-vline 
WA_RCUSB_STR-POSTP sy-vline 
WA_RCUSB_STR-OBTSP sy-vline 
WA_RCUSB_STR-BOMOB sy-vline 
WA_RCUSB_STR-KTEXT sy-vline 
WA_RCUSB_STR-ATNAM sy-vline 
WA_RCUSB_STR-ATBEZ sy-vline 
WA_RCUSB_STR-ATWRT sy-vline 
WA_RCUSB_STR-ATWTB sy-vline 
WA_RCUSB_STR-HEDL sy-vline 
WA_RCUSB_STR-VORNR sy-vline 
WA_RCUSB_STR-UVORN sy-vline 
WA_RCUSB_STR-ARBPL sy-vline 
WA_RCUSB_STR-PTEXT sy-vline 
WA_RCUSB_STR-PLNFL sy-vline 
WA_RCUSB_STR-FLGTEXT sy-vline 
WA_RCUSB_STR-PSNFH sy-vline 
WA_RCUSB_STR-FHMAR sy-vline 
WA_RCUSB_STR-FHMNR sy-vline 
WA_RCUSB_STR-FHKTX sy-vline 
WA_RCUSB_STR-LTXA1 sy-vline 
WA_RCUSB_STR-KNNETC sy-vline 
WA_RCUSB_STR-KNNETR sy-vline 
WA_RCUSB_STR-KNNETR_EV sy-vline 
WA_RCUSB_STR-KNNETR_MO sy-vline 
WA_RCUSB_STR-KNSCE sy-vline 
WA_RCUSB_STR-KNNAM sy-vline 
WA_RCUSB_STR-KNKTX sy-vline 
WA_RCUSB_STR-PLNNR sy-vline 
WA_RCUSB_STR-PLNAL sy-vline 
WA_RCUSB_STR-SPEC_NO sy-vline 
WA_RCUSB_STR-TXZ01 sy-vline 
WA_RCUSB_STR-EXTROW sy-vline 
WA_RCUSB_STR-SRVPOS sy-vline 
WA_RCUSB_STR-KTEXT1 sy-vline 
WA_RCUSB_STR-PROC_MODE sy-vline      INTO ld_text SEPARATED BY SPACE.

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