ABAP Select data from SAP table WDFR_PAR into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM WDFR_PAR
*  INTO TABLE @DATA(IT_WDFR_PAR2).
*--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_WDFR_PAR INDEX 1 INTO DATA(WA_WDFR_PAR2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<WDFR_PAR>-LGORT = 1.
<WDFR_PAR>-BBTYP = 1.
<WDFR_PAR>-BBTEXT = 1.
<WDFR_PAR>-MATKL = 1.
<WDFR_PAR>-AKTMA = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_WDFR_PAR-EKORG, sy-vline,
  WA_WDFR_PAR-EKGRP, sy-vline,
  WA_WDFR_PAR-BEDAT, sy-vline,
  WA_WDFR_PAR-BSDAT, sy-vline,
  WA_WDFR_PAR-AVRULE, sy-vline,
  WA_WDFR_PAR-DEBNR, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_WDFR_PAR 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_WDFR_PAR 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_WDFR_PAR INTO WA_WDFR_PAR.


*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 AKTMA
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_WDFR_PAR-AKTMA
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_WDFR_PAR-AKTMA.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field DEBNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_WDFR_PAR-DEBNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_WDFR_PAR-DEBNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ISOLA, internal->external for field SPRAS
CALL FUNCTION 'CONVERSION_EXIT_ISOLA_OUTPUT'
  EXPORTING
    input =                      WA_WDFR_PAR-SPRAS
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_WDFR_PAR-SPRAS.
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_WDFR_PAR_STR, 
LGORT TYPE STRING,
BBTYP TYPE STRING,
BBTEXT TYPE STRING,
MATKL TYPE STRING,
AKTMA TYPE STRING,
EKORG TYPE STRING,
EKGRP TYPE STRING,
BEDAT TYPE STRING,
BSDAT TYPE STRING,
AVRULE TYPE STRING,
DEBNR TYPE STRING,
BUKRS TYPE STRING,
VKORG TYPE STRING,
VTWEG TYPE STRING,
SPART TYPE STRING,
LAND1 TYPE STRING,
ERWSE TYPE STRING,
SPRAS TYPE STRING,
SAMANZ TYPE STRING,
VARANZ TYPE STRING,
LAGAB TYPE STRING,
LIVAR TYPE STRING,
VKERV TYPE STRING,
BSART TYPE STRING,
PSTYP TYPE STRING,
KNTTP TYPE STRING,
MISCH TYPE STRING,
BPROT TYPE STRING,
ABNER TYPE STRING,
ATPER TYPE STRING,
FVBER TYPE STRING,
UMSER TYPE STRING,
BVLER TYPE STRING,
UAVER TYPE STRING,
DIFER TYPE STRING,
INFER TYPE STRING,
KALER TYPE STRING,
SORER TYPE STRING,END OF T_EKKO_STR.
DATA: WA_WDFR_PAR_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_WDFR_PAR_STR-LGORT sy-vline 
WA_WDFR_PAR_STR-BBTYP sy-vline 
WA_WDFR_PAR_STR-BBTEXT sy-vline 
WA_WDFR_PAR_STR-MATKL sy-vline 
WA_WDFR_PAR_STR-AKTMA sy-vline 
WA_WDFR_PAR_STR-EKORG sy-vline 
WA_WDFR_PAR_STR-EKGRP sy-vline 
WA_WDFR_PAR_STR-BEDAT sy-vline 
WA_WDFR_PAR_STR-BSDAT sy-vline 
WA_WDFR_PAR_STR-AVRULE sy-vline 
WA_WDFR_PAR_STR-DEBNR sy-vline 
WA_WDFR_PAR_STR-BUKRS sy-vline 
WA_WDFR_PAR_STR-VKORG sy-vline 
WA_WDFR_PAR_STR-VTWEG sy-vline 
WA_WDFR_PAR_STR-SPART sy-vline 
WA_WDFR_PAR_STR-LAND1 sy-vline 
WA_WDFR_PAR_STR-ERWSE sy-vline 
WA_WDFR_PAR_STR-SPRAS sy-vline 
WA_WDFR_PAR_STR-SAMANZ sy-vline 
WA_WDFR_PAR_STR-VARANZ sy-vline 
WA_WDFR_PAR_STR-LAGAB sy-vline 
WA_WDFR_PAR_STR-LIVAR sy-vline 
WA_WDFR_PAR_STR-VKERV sy-vline 
WA_WDFR_PAR_STR-BSART sy-vline 
WA_WDFR_PAR_STR-PSTYP sy-vline 
WA_WDFR_PAR_STR-KNTTP sy-vline 
WA_WDFR_PAR_STR-MISCH sy-vline 
WA_WDFR_PAR_STR-BPROT sy-vline 
WA_WDFR_PAR_STR-ABNER sy-vline 
WA_WDFR_PAR_STR-ATPER sy-vline 
WA_WDFR_PAR_STR-FVBER sy-vline 
WA_WDFR_PAR_STR-UMSER sy-vline 
WA_WDFR_PAR_STR-BVLER sy-vline 
WA_WDFR_PAR_STR-UAVER sy-vline 
WA_WDFR_PAR_STR-DIFER sy-vline 
WA_WDFR_PAR_STR-INFER sy-vline 
WA_WDFR_PAR_STR-KALER sy-vline 
WA_WDFR_PAR_STR-SORER sy-vline      INTO ld_text SEPARATED BY SPACE.

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