ABAP Select data from SAP table DFKKFWBEW_LD into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM DFKKFWBEW_LD
*  INTO TABLE @DATA(IT_DFKKFWBEW_LD2).
*--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_DFKKFWBEW_LD INDEX 1 INTO DATA(WA_DFKKFWBEW_LD2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<DFKKFWBEW_LD>-MANDT = 1.
<DFKKFWBEW_LD>-RLDNR = 1.
<DFKKFWBEW_LD>-BWDAT = 1.
<DFKKFWBEW_LD>-BUKRS = 1.
<DFKKFWBEW_LD>-CURTP = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_DFKKFWBEW_LD-BWVAR, sy-vline,
  WA_DFKKFWBEW_LD-FBZAE, sy-vline,
  WA_DFKKFWBEW_LD-UNAME, sy-vline,
  WA_DFKKFWBEW_LD-CDATE, sy-vline,
  WA_DFKKFWBEW_LD-CTIME, sy-vline,
  WA_DFKKFWBEW_LD-FIKEY, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_DFKKFWBEW_LD 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_DFKKFWBEW_LD 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_DFKKFWBEW_LD INTO WA_DFKKFWBEW_LD.


*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 RLDNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_DFKKFWBEW_LD-RLDNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_DFKKFWBEW_LD-RLDNR.
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_DFKKFWBEW_LD_STR, 
MANDT TYPE STRING,
RLDNR TYPE STRING,
BWDAT TYPE STRING,
BUKRS TYPE STRING,
CURTP TYPE STRING,
BWVAR TYPE STRING,
FBZAE TYPE STRING,
UNAME TYPE STRING,
CDATE TYPE STRING,
CTIME TYPE STRING,
FIKEY TYPE STRING,
BWMET TYPE STRING,
BWBER TYPE STRING,
LDGRP TYPE STRING,
VGLDAT TYPE STRING,
FIKEY_CANC TYPE STRING,
BNEXT TYPE STRING,
SIMUL TYPE STRING,
LAUFD TYPE STRING,
LAUFI TYPE STRING,END OF T_EKKO_STR.
DATA: WA_DFKKFWBEW_LD_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_DFKKFWBEW_LD_STR-MANDT sy-vline 
WA_DFKKFWBEW_LD_STR-RLDNR sy-vline 
WA_DFKKFWBEW_LD_STR-BWDAT sy-vline 
WA_DFKKFWBEW_LD_STR-BUKRS sy-vline 
WA_DFKKFWBEW_LD_STR-CURTP sy-vline 
WA_DFKKFWBEW_LD_STR-BWVAR sy-vline 
WA_DFKKFWBEW_LD_STR-FBZAE sy-vline 
WA_DFKKFWBEW_LD_STR-UNAME sy-vline 
WA_DFKKFWBEW_LD_STR-CDATE sy-vline 
WA_DFKKFWBEW_LD_STR-CTIME sy-vline 
WA_DFKKFWBEW_LD_STR-FIKEY sy-vline 
WA_DFKKFWBEW_LD_STR-BWMET sy-vline 
WA_DFKKFWBEW_LD_STR-BWBER sy-vline 
WA_DFKKFWBEW_LD_STR-LDGRP sy-vline 
WA_DFKKFWBEW_LD_STR-VGLDAT sy-vline 
WA_DFKKFWBEW_LD_STR-FIKEY_CANC sy-vline 
WA_DFKKFWBEW_LD_STR-BNEXT sy-vline 
WA_DFKKFWBEW_LD_STR-SIMUL sy-vline 
WA_DFKKFWBEW_LD_STR-LAUFD sy-vline 
WA_DFKKFWBEW_LD_STR-LAUFI sy-vline      INTO ld_text SEPARATED BY SPACE.

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