ABAP Select data from SAP table RFCGI 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 RFCGI 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 RFCGI. 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 RFCGI 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_RFCGI TYPE STANDARD TABLE OF RFCGI,
      WA_RFCGI TYPE RFCGI,
      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: <RFCGI> TYPE RFCGI.

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM RFCGI
*  INTO TABLE @DATA(IT_RFCGI2).
*--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_RFCGI INDEX 1 INTO DATA(WA_RFCGI2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<RFCGI>-SYSID = 1.
<RFCGI>-MANDT = 1.
<RFCGI>-LANGU = 1.
<RFCGI>-HOST = 1.
<RFCGI>-SYSNR = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_RFCGI-GWHOST, sy-vline,
  WA_RFCGI-GWSERVICE, sy-vline,
  WA_RFCGI-SAPRL, sy-vline,
  WA_RFCGI-CURFORM, sy-vline,
  WA_RFCGI-CURLANGU, sy-vline,
  WA_RFCGI-CURTEXT, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_RFCGI 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_RFCGI 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_RFCGI INTO WA_RFCGI.


*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 ISOLA, internal->external for field LANGU
CALL FUNCTION 'CONVERSION_EXIT_ISOLA_OUTPUT'
  EXPORTING
    input =                      WA_RFCGI-LANGU
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RFCGI-LANGU.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ISOLA, internal->external for field CURLANGU
CALL FUNCTION 'CONVERSION_EXIT_ISOLA_OUTPUT'
  EXPORTING
    input =                      WA_RFCGI-CURLANGU
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RFCGI-CURLANGU.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ISOLA, internal->external for field CUILANGU
CALL FUNCTION 'CONVERSION_EXIT_ISOLA_OUTPUT'
  EXPORTING
    input =                      WA_RFCGI-CUILANGU
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RFCGI-CUILANGU.
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_RFCGI_STR, 
SYSID TYPE STRING,
MANDT TYPE STRING,
LANGU TYPE STRING,
HOST TYPE STRING,
SYSNR TYPE STRING,
GWHOST TYPE STRING,
GWSERVICE TYPE STRING,
SAPRL TYPE STRING,
CURFORM TYPE STRING,
CURLANGU TYPE STRING,
CURTEXT TYPE STRING,
CUIFORM TYPE STRING,
CUILANGU TYPE STRING,
CUIWINDOW TYPE STRING,
CUIELEMENT TYPE STRING,
TEXT1 TYPE STRING,
TEXT2 TYPE STRING,
TEXT3 TYPE STRING,
TEXT4 TYPE STRING,
TEXT5 TYPE STRING,
CURAPPL TYPE STRING,
FILEPREF TYPE STRING,
CURFILE TYPE STRING,END OF T_EKKO_STR.
DATA: WA_RFCGI_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_RFCGI_STR-SYSID sy-vline 
WA_RFCGI_STR-MANDT sy-vline 
WA_RFCGI_STR-LANGU sy-vline 
WA_RFCGI_STR-HOST sy-vline 
WA_RFCGI_STR-SYSNR sy-vline 
WA_RFCGI_STR-GWHOST sy-vline 
WA_RFCGI_STR-GWSERVICE sy-vline 
WA_RFCGI_STR-SAPRL sy-vline 
WA_RFCGI_STR-CURFORM sy-vline 
WA_RFCGI_STR-CURLANGU sy-vline 
WA_RFCGI_STR-CURTEXT sy-vline 
WA_RFCGI_STR-CUIFORM sy-vline 
WA_RFCGI_STR-CUILANGU sy-vline 
WA_RFCGI_STR-CUIWINDOW sy-vline 
WA_RFCGI_STR-CUIELEMENT sy-vline 
WA_RFCGI_STR-TEXT1 sy-vline 
WA_RFCGI_STR-TEXT2 sy-vline 
WA_RFCGI_STR-TEXT3 sy-vline 
WA_RFCGI_STR-TEXT4 sy-vline 
WA_RFCGI_STR-TEXT5 sy-vline 
WA_RFCGI_STR-CURAPPL sy-vline 
WA_RFCGI_STR-FILEPREF sy-vline 
WA_RFCGI_STR-CURFILE sy-vline      INTO ld_text SEPARATED BY SPACE.

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