ABAP Select data from SAP table WRF_AL_EXPORT_FILE_STY into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM WRF_AL_EXPORT_FILE_STY
*  INTO TABLE @DATA(IT_WRF_AL_EXPORT_FILE_STY2).
*--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_WRF_AL_EXPORT_FILE_STY INDEX 1 INTO DATA(WA_WRF_AL_EXPORT_FILE_STY2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<WRF_AL_EXPORT_FILE_STY>-FIELD1 = 1.
<WRF_AL_EXPORT_FILE_STY>-FIELD2 = 1.
<WRF_AL_EXPORT_FILE_STY>-FIELD3 = 1.
<WRF_AL_EXPORT_FILE_STY>-FIELD4 = 1.
<WRF_AL_EXPORT_FILE_STY>-FIELD5 = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_WRF_AL_EXPORT_FILE_STY-FIELD6, sy-vline,
  WA_WRF_AL_EXPORT_FILE_STY-FIELD7, sy-vline,
  WA_WRF_AL_EXPORT_FILE_STY-FIELD8, sy-vline,
  WA_WRF_AL_EXPORT_FILE_STY-FIELD9, sy-vline,
  WA_WRF_AL_EXPORT_FILE_STY-FIELD10, sy-vline,
  WA_WRF_AL_EXPORT_FILE_STY-FIELD11, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_WRF_AL_EXPORT_FILE_STY 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_WRF_AL_EXPORT_FILE_STY 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_WRF_AL_EXPORT_FILE_STY INTO WA_WRF_AL_EXPORT_FILE_STY.


*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_WRF_AL_EXPORT_FILE_STY_STR, 
FIELD1 TYPE STRING,
FIELD2 TYPE STRING,
FIELD3 TYPE STRING,
FIELD4 TYPE STRING,
FIELD5 TYPE STRING,
FIELD6 TYPE STRING,
FIELD7 TYPE STRING,
FIELD8 TYPE STRING,
FIELD9 TYPE STRING,
FIELD10 TYPE STRING,
FIELD11 TYPE STRING,
FIELD12 TYPE STRING,
FIELD13 TYPE STRING,
FIELD14 TYPE STRING,
FIELD15 TYPE STRING,
FIELD16 TYPE STRING,
FIELD17 TYPE STRING,
FIELD18 TYPE STRING,
FIELD19 TYPE STRING,
FIELD20 TYPE STRING,
FIELD21 TYPE STRING,
FIELD22 TYPE STRING,
FIELD23 TYPE STRING,
FIELD24 TYPE STRING,
FIELD25 TYPE STRING,
FIELD26 TYPE STRING,
FIELD27 TYPE STRING,
FIELD28 TYPE STRING,
FIELD29 TYPE STRING,
FIELD30 TYPE STRING,
FIELD31 TYPE STRING,
FIELD32 TYPE STRING,
FIELD33 TYPE STRING,
FIELD34 TYPE STRING,
FIELD35 TYPE STRING,
FIELD36 TYPE STRING,
FIELD37 TYPE STRING,
FIELD38 TYPE STRING,
FIELD39 TYPE STRING,
FIELD40 TYPE STRING,
FIELD41 TYPE STRING,
FIELD42 TYPE STRING,
FIELD43 TYPE STRING,
FIELD44 TYPE STRING,
FIELD45 TYPE STRING,
FIELD56 TYPE STRING,
FIELD57 TYPE STRING,
FIELD58 TYPE STRING,
FIELD49 TYPE STRING,
FIELD50 TYPE STRING,END OF T_EKKO_STR.
DATA: WA_WRF_AL_EXPORT_FILE_STY_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_WRF_AL_EXPORT_FILE_STY_STR-FIELD1 sy-vline 
WA_WRF_AL_EXPORT_FILE_STY_STR-FIELD2 sy-vline 
WA_WRF_AL_EXPORT_FILE_STY_STR-FIELD3 sy-vline 
WA_WRF_AL_EXPORT_FILE_STY_STR-FIELD4 sy-vline 
WA_WRF_AL_EXPORT_FILE_STY_STR-FIELD5 sy-vline 
WA_WRF_AL_EXPORT_FILE_STY_STR-FIELD6 sy-vline 
WA_WRF_AL_EXPORT_FILE_STY_STR-FIELD7 sy-vline 
WA_WRF_AL_EXPORT_FILE_STY_STR-FIELD8 sy-vline 
WA_WRF_AL_EXPORT_FILE_STY_STR-FIELD9 sy-vline 
WA_WRF_AL_EXPORT_FILE_STY_STR-FIELD10 sy-vline 
WA_WRF_AL_EXPORT_FILE_STY_STR-FIELD11 sy-vline 
WA_WRF_AL_EXPORT_FILE_STY_STR-FIELD12 sy-vline 
WA_WRF_AL_EXPORT_FILE_STY_STR-FIELD13 sy-vline 
WA_WRF_AL_EXPORT_FILE_STY_STR-FIELD14 sy-vline 
WA_WRF_AL_EXPORT_FILE_STY_STR-FIELD15 sy-vline 
WA_WRF_AL_EXPORT_FILE_STY_STR-FIELD16 sy-vline 
WA_WRF_AL_EXPORT_FILE_STY_STR-FIELD17 sy-vline 
WA_WRF_AL_EXPORT_FILE_STY_STR-FIELD18 sy-vline 
WA_WRF_AL_EXPORT_FILE_STY_STR-FIELD19 sy-vline 
WA_WRF_AL_EXPORT_FILE_STY_STR-FIELD20 sy-vline 
WA_WRF_AL_EXPORT_FILE_STY_STR-FIELD21 sy-vline 
WA_WRF_AL_EXPORT_FILE_STY_STR-FIELD22 sy-vline 
WA_WRF_AL_EXPORT_FILE_STY_STR-FIELD23 sy-vline 
WA_WRF_AL_EXPORT_FILE_STY_STR-FIELD24 sy-vline 
WA_WRF_AL_EXPORT_FILE_STY_STR-FIELD25 sy-vline 
WA_WRF_AL_EXPORT_FILE_STY_STR-FIELD26 sy-vline 
WA_WRF_AL_EXPORT_FILE_STY_STR-FIELD27 sy-vline 
WA_WRF_AL_EXPORT_FILE_STY_STR-FIELD28 sy-vline 
WA_WRF_AL_EXPORT_FILE_STY_STR-FIELD29 sy-vline 
WA_WRF_AL_EXPORT_FILE_STY_STR-FIELD30 sy-vline 
WA_WRF_AL_EXPORT_FILE_STY_STR-FIELD31 sy-vline 
WA_WRF_AL_EXPORT_FILE_STY_STR-FIELD32 sy-vline 
WA_WRF_AL_EXPORT_FILE_STY_STR-FIELD33 sy-vline 
WA_WRF_AL_EXPORT_FILE_STY_STR-FIELD34 sy-vline 
WA_WRF_AL_EXPORT_FILE_STY_STR-FIELD35 sy-vline 
WA_WRF_AL_EXPORT_FILE_STY_STR-FIELD36 sy-vline 
WA_WRF_AL_EXPORT_FILE_STY_STR-FIELD37 sy-vline 
WA_WRF_AL_EXPORT_FILE_STY_STR-FIELD38 sy-vline 
WA_WRF_AL_EXPORT_FILE_STY_STR-FIELD39 sy-vline 
WA_WRF_AL_EXPORT_FILE_STY_STR-FIELD40 sy-vline 
WA_WRF_AL_EXPORT_FILE_STY_STR-FIELD41 sy-vline 
WA_WRF_AL_EXPORT_FILE_STY_STR-FIELD42 sy-vline 
WA_WRF_AL_EXPORT_FILE_STY_STR-FIELD43 sy-vline 
WA_WRF_AL_EXPORT_FILE_STY_STR-FIELD44 sy-vline 
WA_WRF_AL_EXPORT_FILE_STY_STR-FIELD45 sy-vline 
WA_WRF_AL_EXPORT_FILE_STY_STR-FIELD56 sy-vline 
WA_WRF_AL_EXPORT_FILE_STY_STR-FIELD57 sy-vline 
WA_WRF_AL_EXPORT_FILE_STY_STR-FIELD58 sy-vline 
WA_WRF_AL_EXPORT_FILE_STY_STR-FIELD49 sy-vline 
WA_WRF_AL_EXPORT_FILE_STY_STR-FIELD50 sy-vline      INTO ld_text SEPARATED BY SPACE.

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