ABAP Select data from SAP table RGCU4 into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP RGCU4 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 RGCU4. 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 RGCU4 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_RGCU4 TYPE STANDARD TABLE OF RGCU4,
      WA_RGCU4 TYPE RGCU4,
      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: <RGCU4> TYPE RGCU4.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_RGCU4.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM RGCU4
  INTO TABLE IT_RGCU4.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM RGCU4
*  INTO TABLE @DATA(IT_RGCU42).
*--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_RGCU4 INDEX 1 INTO DATA(WA_RGCU42).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_RGCU4 ASSIGNING <RGCU4>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<RGCU4>-RCOMP1 = 1.
<RGCU4>-RCOMP2 = 1.
<RGCU4>-RLDNR1 = 1.
<RGCU4>-RLDNR2 = 1.
<RGCU4>-ACTIVITY1 = 1.

ENDLOOP.

LOOP AT IT_RGCU4 INTO WA_RGCU4.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_RGCU4-ACTIVITY2, sy-vline,
  WA_RGCU4-FELDMODIF1, sy-vline,
  WA_RGCU4-FELDMODIF2, sy-vline,
  WA_RGCU4-BUKRS1, sy-vline,
  WA_RGCU4-BUKRS2, sy-vline,
  WA_RGCU4-DIREKTBUCH, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_RGCU4 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_RGCU4 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_RGCU4 INTO WA_RGCU4.


*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 RCOMP1
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RGCU4-RCOMP1
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RGCU4-RCOMP1.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field RCOMP2
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RGCU4-RCOMP2
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RGCU4-RCOMP2.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field RLDNR1
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RGCU4-RLDNR1
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RGCU4-RLDNR1.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field RLDNR2
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RGCU4-RLDNR2
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RGCU4-RLDNR2.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field LEDGERFARB
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RGCU4-LEDGERFARB
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RGCU4-LEDGERFARB.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field GESELLFARB
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RGCU4-GESELLFARB
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RGCU4-GESELLFARB.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field VORGANGFAR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RGCU4-VORGANGFAR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RGCU4-VORGANGFAR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field NICHTAKTIV
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RGCU4-NICHTAKTIV
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RGCU4-NICHTAKTIV.
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_RGCU4_STR, 
RCOMP1 TYPE STRING,
RCOMP2 TYPE STRING,
RLDNR1 TYPE STRING,
RLDNR2 TYPE STRING,
ACTIVITY1 TYPE STRING,
ACTIVITY2 TYPE STRING,
FELDMODIF1 TYPE STRING,
FELDMODIF2 TYPE STRING,
BUKRS1 TYPE STRING,
BUKRS2 TYPE STRING,
DIREKTBUCH TYPE STRING,
NACHBUCH TYPE STRING,
LEDGERFARB TYPE STRING,
GESELLFARB TYPE STRING,
VORGANGFAR TYPE STRING,
NICHTAKTIV TYPE STRING,
HIERARCFIT TYPE STRING,END OF T_EKKO_STR.
DATA: WA_RGCU4_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_RGCU4_STR-RCOMP1 sy-vline 
WA_RGCU4_STR-RCOMP2 sy-vline 
WA_RGCU4_STR-RLDNR1 sy-vline 
WA_RGCU4_STR-RLDNR2 sy-vline 
WA_RGCU4_STR-ACTIVITY1 sy-vline 
WA_RGCU4_STR-ACTIVITY2 sy-vline 
WA_RGCU4_STR-FELDMODIF1 sy-vline 
WA_RGCU4_STR-FELDMODIF2 sy-vline 
WA_RGCU4_STR-BUKRS1 sy-vline 
WA_RGCU4_STR-BUKRS2 sy-vline 
WA_RGCU4_STR-DIREKTBUCH sy-vline 
WA_RGCU4_STR-NACHBUCH sy-vline 
WA_RGCU4_STR-LEDGERFARB sy-vline 
WA_RGCU4_STR-GESELLFARB sy-vline 
WA_RGCU4_STR-VORGANGFAR sy-vline 
WA_RGCU4_STR-NICHTAKTIV sy-vline 
WA_RGCU4_STR-HIERARCFIT sy-vline      INTO ld_text SEPARATED BY SPACE.

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