ABAP Select data from SAP table DFKKWLI_IL into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM DFKKWLI_IL
*  INTO TABLE @DATA(IT_DFKKWLI_IL2).
*--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_DFKKWLI_IL INDEX 1 INTO DATA(WA_DFKKWLI_IL2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<DFKKWLI_IL>-MANDT = 1.
<DFKKWLI_IL>-WLIGUID = 1.
<DFKKWLI_IL>-OPBEL = 1.
<DFKKWLI_IL>-OPUPW = 1.
<DFKKWLI_IL>-OPUPK = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_DFKKWLI_IL-OPUPZ, sy-vline,
  WA_DFKKWLI_IL-BETRW, sy-vline,
  WA_DFKKWLI_IL-WAERS, sy-vline,
  WA_DFKKWLI_IL-FAEDN, sy-vline,
  WA_DFKKWLI_IL-COMMT, sy-vline,
  WA_DFKKWLI_IL-XADDLATER, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_DFKKWLI_IL 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_DFKKWLI_IL 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_DFKKWLI_IL INTO WA_DFKKWLI_IL.


*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 OPBEL
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_DFKKWLI_IL-OPBEL
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_DFKKWLI_IL-OPBEL.
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_DFKKWLI_IL_STR, 
MANDT TYPE STRING,
WLIGUID TYPE STRING,
OPBEL TYPE STRING,
OPUPW TYPE STRING,
OPUPK TYPE STRING,
OPUPZ TYPE STRING,
BETRW TYPE STRING,
WAERS TYPE STRING,
FAEDN TYPE STRING,
COMMT TYPE STRING,
XADDLATER TYPE STRING,
XINACTIVE TYPE STRING,
AEDAT TYPE STRING,
AETIM TYPE STRING,
AENAM TYPE STRING,
MOPUPZ TYPE STRING,END OF T_EKKO_STR.
DATA: WA_DFKKWLI_IL_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_DFKKWLI_IL_STR-MANDT sy-vline 
WA_DFKKWLI_IL_STR-WLIGUID sy-vline 
WA_DFKKWLI_IL_STR-OPBEL sy-vline 
WA_DFKKWLI_IL_STR-OPUPW sy-vline 
WA_DFKKWLI_IL_STR-OPUPK sy-vline 
WA_DFKKWLI_IL_STR-OPUPZ sy-vline 
WA_DFKKWLI_IL_STR-BETRW sy-vline 
WA_DFKKWLI_IL_STR-WAERS sy-vline 
WA_DFKKWLI_IL_STR-FAEDN sy-vline 
WA_DFKKWLI_IL_STR-COMMT sy-vline 
WA_DFKKWLI_IL_STR-XADDLATER sy-vline 
WA_DFKKWLI_IL_STR-XINACTIVE sy-vline 
WA_DFKKWLI_IL_STR-AEDAT sy-vline 
WA_DFKKWLI_IL_STR-AETIM sy-vline 
WA_DFKKWLI_IL_STR-AENAM sy-vline 
WA_DFKKWLI_IL_STR-MOPUPZ sy-vline      INTO ld_text SEPARATED BY SPACE.

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