ABAP Select data from SAP table WUF_SEL_FIELDS into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM WUF_SEL_FIELDS
*  INTO TABLE @DATA(IT_WUF_SEL_FIELDS2).
*--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_WUF_SEL_FIELDS INDEX 1 INTO DATA(WA_WUF_SEL_FIELDS2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<WUF_SEL_FIELDS>-FIELDNAME = 1.
<WUF_SEL_FIELDS>-FIELDNAMETXT = 1.
<WUF_SEL_FIELDS>-VISIBLE = 1.
<WUF_SEL_FIELDS>-SIGN = 1.
<WUF_SEL_FIELDS>-OPTION = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_WUF_SEL_FIELDS-LOW, sy-vline,
  WA_WUF_SEL_FIELDS-HIGH, sy-vline,
  WA_WUF_SEL_FIELDS-MORE, sy-vline,
  WA_WUF_SEL_FIELDS-FIELDNAME__1, sy-vline,
  WA_WUF_SEL_FIELDS-FIELDNAMETXT__1, sy-vline,
  WA_WUF_SEL_FIELDS-VISIBLE__1, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_WUF_SEL_FIELDS 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_WUF_SEL_FIELDS 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_WUF_SEL_FIELDS INTO WA_WUF_SEL_FIELDS.


*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.
ENDFORM. 

*&---------------------------------------------------------------------*
*& Form process_as_string_field_values
*&---------------------------------------------------------------------*
FORM process_as_string_field_values CHANGING p_EKKO LIKE wa_EKKO.

TYPES: BEGIN OF T_WUF_SEL_FIELDS_STR, 
FIELDNAME TYPE STRING,
FIELDNAMETXT TYPE STRING,
VISIBLE TYPE STRING,
SIGN TYPE STRING,
OPTION TYPE STRING,
LOW TYPE STRING,
HIGH TYPE STRING,
MORE TYPE STRING,
FIELDNAME__1 TYPE STRING,
FIELDNAMETXT__1 TYPE STRING,
VISIBLE__1 TYPE STRING,
SIGN__1 TYPE STRING,
OPTION__1 TYPE STRING,
LOW__1 TYPE STRING,
HIGH__1 TYPE STRING,
MORE__1 TYPE STRING,
FIELDNAME__2 TYPE STRING,
FIELDNAMETXT__2 TYPE STRING,
VISIBLE__2 TYPE STRING,
SIGN__2 TYPE STRING,
OPTION__2 TYPE STRING,
LOW__2 TYPE STRING,
HIGH__2 TYPE STRING,
MORE__2 TYPE STRING,
FIELDNAME__3 TYPE STRING,
FIELDNAMETXT__3 TYPE STRING,
VISIBLE__3 TYPE STRING,
SIGN__3 TYPE STRING,
OPTION__3 TYPE STRING,
LOW__3 TYPE STRING,
HIGH__3 TYPE STRING,
MORE__3 TYPE STRING,
FIELDNAME__4 TYPE STRING,
FIELDNAMETXT__4 TYPE STRING,
VISIBLE__4 TYPE STRING,
SIGN__4 TYPE STRING,
OPTION__4 TYPE STRING,
LOW__4 TYPE STRING,
HIGH__4 TYPE STRING,
MORE__4 TYPE STRING,
FIELDNAME__5 TYPE STRING,
FIELDNAMETXT__5 TYPE STRING,
VISIBLE__5 TYPE STRING,
SIGN__5 TYPE STRING,
OPTION__5 TYPE STRING,
LOW__5 TYPE STRING,
HIGH__5 TYPE STRING,
MORE__5 TYPE STRING,
FIELDNAME__6 TYPE STRING,
FIELDNAMETXT__6 TYPE STRING,
VISIBLE__6 TYPE STRING,
SIGN__6 TYPE STRING,
OPTION__6 TYPE STRING,
LOW__6 TYPE STRING,
HIGH__6 TYPE STRING,
MORE__6 TYPE STRING,
FIELDNAME__7 TYPE STRING,
FIELDNAMETXT__7 TYPE STRING,
VISIBLE__7 TYPE STRING,
SIGN__7 TYPE STRING,
OPTION__7 TYPE STRING,
LOW__7 TYPE STRING,
HIGH__7 TYPE STRING,
MORE__7 TYPE STRING,
FIELDNAME__8 TYPE STRING,
FIELDNAMETXT__8 TYPE STRING,
VISIBLE__8 TYPE STRING,
SIGN__8 TYPE STRING,
OPTION__8 TYPE STRING,
LOW__8 TYPE STRING,
HIGH__8 TYPE STRING,
MORE__8 TYPE STRING,
FIELDNAME__9 TYPE STRING,
FIELDNAMETXT__9 TYPE STRING,
VISIBLE__9 TYPE STRING,
SIGN__9 TYPE STRING,
OPTION__9 TYPE STRING,
LOW__9 TYPE STRING,
HIGH__9 TYPE STRING,
MORE__9 TYPE STRING,
FIELDNAME__10 TYPE STRING,
FIELDNAMETXT__10 TYPE STRING,
VISIBLE__10 TYPE STRING,
SIGN__10 TYPE STRING,
OPTION__10 TYPE STRING,
LOW__10 TYPE STRING,
HIGH__10 TYPE STRING,
MORE__10 TYPE STRING,END OF T_EKKO_STR.
DATA: WA_WUF_SEL_FIELDS_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_WUF_SEL_FIELDS_STR-FIELDNAME sy-vline 
WA_WUF_SEL_FIELDS_STR-FIELDNAMETXT sy-vline 
WA_WUF_SEL_FIELDS_STR-VISIBLE sy-vline 
WA_WUF_SEL_FIELDS_STR-SIGN sy-vline 
WA_WUF_SEL_FIELDS_STR-OPTION sy-vline 
WA_WUF_SEL_FIELDS_STR-LOW sy-vline 
WA_WUF_SEL_FIELDS_STR-HIGH sy-vline 
WA_WUF_SEL_FIELDS_STR-MORE sy-vline 
WA_WUF_SEL_FIELDS_STR-FIELDNAME__1 sy-vline 
WA_WUF_SEL_FIELDS_STR-FIELDNAMETXT__1 sy-vline 
WA_WUF_SEL_FIELDS_STR-VISIBLE__1 sy-vline 
WA_WUF_SEL_FIELDS_STR-SIGN__1 sy-vline 
WA_WUF_SEL_FIELDS_STR-OPTION__1 sy-vline 
WA_WUF_SEL_FIELDS_STR-LOW__1 sy-vline 
WA_WUF_SEL_FIELDS_STR-HIGH__1 sy-vline 
WA_WUF_SEL_FIELDS_STR-MORE__1 sy-vline 
WA_WUF_SEL_FIELDS_STR-FIELDNAME__2 sy-vline 
WA_WUF_SEL_FIELDS_STR-FIELDNAMETXT__2 sy-vline 
WA_WUF_SEL_FIELDS_STR-VISIBLE__2 sy-vline 
WA_WUF_SEL_FIELDS_STR-SIGN__2 sy-vline 
WA_WUF_SEL_FIELDS_STR-OPTION__2 sy-vline 
WA_WUF_SEL_FIELDS_STR-LOW__2 sy-vline 
WA_WUF_SEL_FIELDS_STR-HIGH__2 sy-vline 
WA_WUF_SEL_FIELDS_STR-MORE__2 sy-vline 
WA_WUF_SEL_FIELDS_STR-FIELDNAME__3 sy-vline 
WA_WUF_SEL_FIELDS_STR-FIELDNAMETXT__3 sy-vline 
WA_WUF_SEL_FIELDS_STR-VISIBLE__3 sy-vline 
WA_WUF_SEL_FIELDS_STR-SIGN__3 sy-vline 
WA_WUF_SEL_FIELDS_STR-OPTION__3 sy-vline 
WA_WUF_SEL_FIELDS_STR-LOW__3 sy-vline 
WA_WUF_SEL_FIELDS_STR-HIGH__3 sy-vline 
WA_WUF_SEL_FIELDS_STR-MORE__3 sy-vline 
WA_WUF_SEL_FIELDS_STR-FIELDNAME__4 sy-vline 
WA_WUF_SEL_FIELDS_STR-FIELDNAMETXT__4 sy-vline 
WA_WUF_SEL_FIELDS_STR-VISIBLE__4 sy-vline 
WA_WUF_SEL_FIELDS_STR-SIGN__4 sy-vline 
WA_WUF_SEL_FIELDS_STR-OPTION__4 sy-vline 
WA_WUF_SEL_FIELDS_STR-LOW__4 sy-vline 
WA_WUF_SEL_FIELDS_STR-HIGH__4 sy-vline 
WA_WUF_SEL_FIELDS_STR-MORE__4 sy-vline 
WA_WUF_SEL_FIELDS_STR-FIELDNAME__5 sy-vline 
WA_WUF_SEL_FIELDS_STR-FIELDNAMETXT__5 sy-vline 
WA_WUF_SEL_FIELDS_STR-VISIBLE__5 sy-vline 
WA_WUF_SEL_FIELDS_STR-SIGN__5 sy-vline 
WA_WUF_SEL_FIELDS_STR-OPTION__5 sy-vline 
WA_WUF_SEL_FIELDS_STR-LOW__5 sy-vline 
WA_WUF_SEL_FIELDS_STR-HIGH__5 sy-vline 
WA_WUF_SEL_FIELDS_STR-MORE__5 sy-vline 
WA_WUF_SEL_FIELDS_STR-FIELDNAME__6 sy-vline 
WA_WUF_SEL_FIELDS_STR-FIELDNAMETXT__6 sy-vline 
WA_WUF_SEL_FIELDS_STR-VISIBLE__6 sy-vline 
WA_WUF_SEL_FIELDS_STR-SIGN__6 sy-vline 
WA_WUF_SEL_FIELDS_STR-OPTION__6 sy-vline 
WA_WUF_SEL_FIELDS_STR-LOW__6 sy-vline 
WA_WUF_SEL_FIELDS_STR-HIGH__6 sy-vline 
WA_WUF_SEL_FIELDS_STR-MORE__6 sy-vline 
WA_WUF_SEL_FIELDS_STR-FIELDNAME__7 sy-vline 
WA_WUF_SEL_FIELDS_STR-FIELDNAMETXT__7 sy-vline 
WA_WUF_SEL_FIELDS_STR-VISIBLE__7 sy-vline 
WA_WUF_SEL_FIELDS_STR-SIGN__7 sy-vline 
WA_WUF_SEL_FIELDS_STR-OPTION__7 sy-vline 
WA_WUF_SEL_FIELDS_STR-LOW__7 sy-vline 
WA_WUF_SEL_FIELDS_STR-HIGH__7 sy-vline 
WA_WUF_SEL_FIELDS_STR-MORE__7 sy-vline 
WA_WUF_SEL_FIELDS_STR-FIELDNAME__8 sy-vline 
WA_WUF_SEL_FIELDS_STR-FIELDNAMETXT__8 sy-vline 
WA_WUF_SEL_FIELDS_STR-VISIBLE__8 sy-vline 
WA_WUF_SEL_FIELDS_STR-SIGN__8 sy-vline 
WA_WUF_SEL_FIELDS_STR-OPTION__8 sy-vline 
WA_WUF_SEL_FIELDS_STR-LOW__8 sy-vline 
WA_WUF_SEL_FIELDS_STR-HIGH__8 sy-vline 
WA_WUF_SEL_FIELDS_STR-MORE__8 sy-vline 
WA_WUF_SEL_FIELDS_STR-FIELDNAME__9 sy-vline 
WA_WUF_SEL_FIELDS_STR-FIELDNAMETXT__9 sy-vline 
WA_WUF_SEL_FIELDS_STR-VISIBLE__9 sy-vline 
WA_WUF_SEL_FIELDS_STR-SIGN__9 sy-vline 
WA_WUF_SEL_FIELDS_STR-OPTION__9 sy-vline 
WA_WUF_SEL_FIELDS_STR-LOW__9 sy-vline 
WA_WUF_SEL_FIELDS_STR-HIGH__9 sy-vline 
WA_WUF_SEL_FIELDS_STR-MORE__9 sy-vline 
WA_WUF_SEL_FIELDS_STR-FIELDNAME__10 sy-vline 
WA_WUF_SEL_FIELDS_STR-FIELDNAMETXT__10 sy-vline 
WA_WUF_SEL_FIELDS_STR-VISIBLE__10 sy-vline 
WA_WUF_SEL_FIELDS_STR-SIGN__10 sy-vline 
WA_WUF_SEL_FIELDS_STR-OPTION__10 sy-vline 
WA_WUF_SEL_FIELDS_STR-LOW__10 sy-vline 
WA_WUF_SEL_FIELDS_STR-HIGH__10 sy-vline 
WA_WUF_SEL_FIELDS_STR-MORE__10 sy-vline      INTO ld_text SEPARATED BY SPACE.

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