ABAP Select data from SAP table GFC_ICONS into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM GFC_ICONS
*  INTO TABLE @DATA(IT_GFC_ICONS2).
*--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_GFC_ICONS INDEX 1 INTO DATA(WA_GFC_ICONS2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<GFC_ICONS>-ID = 1.
<GFC_ICONS>-NAME = 1.
<GFC_ICONS>-OLENG = 1.
<GFC_ICONS>-BUTTON = 1.
<GFC_ICONS>-STATUS = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_GFC_ICONS-MESSAGE, sy-vline,
  WA_GFC_ICONS-FUNCTION, sy-vline,
  WA_GFC_ICONS-TEXTFIELD, sy-vline,
  WA_GFC_ICONS-INTERNAL, sy-vline,
  WA_GFC_ICONS-LOCKED, sy-vline,
  WA_GFC_ICONS-LANGU, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_GFC_ICONS 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_GFC_ICONS 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_GFC_ICONS INTO WA_GFC_ICONS.


*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_GFC_ICONS-LANGU
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_GFC_ICONS-LANGU.
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_GFC_ICONS_STR, 
ID TYPE STRING,
NAME TYPE STRING,
OLENG TYPE STRING,
BUTTON TYPE STRING,
STATUS TYPE STRING,
MESSAGE TYPE STRING,
FUNCTION TYPE STRING,
TEXTFIELD TYPE STRING,
INTERNAL TYPE STRING,
LOCKED TYPE STRING,
LANGU TYPE STRING,
SHORTTEXT TYPE STRING,
QUICKINFO TYPE STRING,END OF T_EKKO_STR.
DATA: WA_GFC_ICONS_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_GFC_ICONS_STR-ID sy-vline 
WA_GFC_ICONS_STR-NAME sy-vline 
WA_GFC_ICONS_STR-OLENG sy-vline 
WA_GFC_ICONS_STR-BUTTON sy-vline 
WA_GFC_ICONS_STR-STATUS sy-vline 
WA_GFC_ICONS_STR-MESSAGE sy-vline 
WA_GFC_ICONS_STR-FUNCTION sy-vline 
WA_GFC_ICONS_STR-TEXTFIELD sy-vline 
WA_GFC_ICONS_STR-INTERNAL sy-vline 
WA_GFC_ICONS_STR-LOCKED sy-vline 
WA_GFC_ICONS_STR-LANGU sy-vline 
WA_GFC_ICONS_STR-SHORTTEXT sy-vline 
WA_GFC_ICONS_STR-QUICKINFO sy-vline      INTO ld_text SEPARATED BY SPACE.

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