ABAP Select data from SAP table RGCU6 into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP RGCU6 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 RGCU6. 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 RGCU6 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_RGCU6 TYPE STANDARD TABLE OF RGCU6,
      WA_RGCU6 TYPE RGCU6,
      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: <RGCU6> TYPE RGCU6.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_RGCU6.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM RGCU6
  INTO TABLE IT_RGCU6.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM RGCU6
*  INTO TABLE @DATA(IT_RGCU62).
*--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_RGCU6 INDEX 1 INTO DATA(WA_RGCU62).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_RGCU6 ASSIGNING <RGCU6>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<RGCU6>-AGGL = 1.
<RGCU6>-AGFI = 1.
<RGCU6>-AGCO = 1.
<RGCU6>-AGMM = 1.
<RGCU6>-AGSD = 1.

ENDLOOP.

LOOP AT IT_RGCU6 INTO WA_RGCU6.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_RGCU6-AGAM, sy-vline,
  WA_RGCU6-AGFD, sy-vline,
  WA_RGCU6-AGHR, sy-vline,
  WA_RGCU6-STDB, sy-vline,
  WA_RGCU6-STNB, sy-vline,
  WA_RGCU6-RLDNR, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_RGCU6 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_RGCU6 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_RGCU6 INTO WA_RGCU6.


*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 RLDNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RGCU6-RLDNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RGCU6-RLDNR.
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_RGCU6_STR, 
AGGL TYPE STRING,
AGFI TYPE STRING,
AGCO TYPE STRING,
AGMM TYPE STRING,
AGSD TYPE STRING,
AGAM TYPE STRING,
AGFD TYPE STRING,
AGHR TYPE STRING,
STDB TYPE STRING,
STNB TYPE STRING,
RLDNR TYPE STRING,
ALL_LEDGER TYPE STRING,
ONE_LEDGER TYPE STRING,END OF T_EKKO_STR.
DATA: WA_RGCU6_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_RGCU6_STR-AGGL sy-vline 
WA_RGCU6_STR-AGFI sy-vline 
WA_RGCU6_STR-AGCO sy-vline 
WA_RGCU6_STR-AGMM sy-vline 
WA_RGCU6_STR-AGSD sy-vline 
WA_RGCU6_STR-AGAM sy-vline 
WA_RGCU6_STR-AGFD sy-vline 
WA_RGCU6_STR-AGHR sy-vline 
WA_RGCU6_STR-STDB sy-vline 
WA_RGCU6_STR-STNB sy-vline 
WA_RGCU6_STR-RLDNR sy-vline 
WA_RGCU6_STR-ALL_LEDGER sy-vline 
WA_RGCU6_STR-ONE_LEDGER sy-vline      INTO ld_text SEPARATED BY SPACE.

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