ABAP Select data from SAP table FKKWLI into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM FKKWLI
*  INTO TABLE @DATA(IT_FKKWLI2).
*--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_FKKWLI INDEX 1 INTO DATA(WA_FKKWLI2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<FKKWLI>-XMARK = 1.
<FKKWLI>-XUPD = 1.
<FKKWLI>-XCANCEL = 1.
<FKKWLI>-XREOPEN = 1.
<FKKWLI>-XSTARTD = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_FKKWLI-XENDD, sy-vline,
  WA_FKKWLI-MANDT, sy-vline,
  WA_FKKWLI-WLIGUID, sy-vline,
  WA_FKKWLI-WLITYPE, sy-vline,
  WA_FKKWLI-WLICAT, sy-vline,
  WA_FKKWLI-STAT, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_FKKWLI 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_FKKWLI 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_FKKWLI INTO WA_FKKWLI.


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

*Conversion exit ALPHA, internal->external for field CONTACTPERS
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_FKKWLI-CONTACTPERS
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_FKKWLI-CONTACTPERS.
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_FKKWLI_STR, 
XMARK TYPE STRING,
XUPD TYPE STRING,
XCANCEL TYPE STRING,
XREOPEN TYPE STRING,
XSTARTD TYPE STRING,
XENDD TYPE STRING,
MANDT TYPE STRING,
WLIGUID TYPE STRING,
WLITYPE TYPE STRING,
WLICAT TYPE STRING,
STAT TYPE STRING,
SUCCDES TYPE STRING,
RSRES TYPE STRING,
ASSIGNRES TYPE STRING,
GPART TYPE STRING,
VKGRP TYPE STRING,
VTGRP TYPE STRING,
GRPFIELD TYPE STRING,
ITEMGRP TYPE STRING,
SUBAP TYPE STRING,
ORIG TYPE STRING,
ORIGKEY TYPE STRING,
BUKRS TYPE STRING,
STRAT TYPE STRING,
STEP TYPE STRING,
MAHNV TYPE STRING,
MAHNS TYPE STRING,
ACKEY TYPE STRING,
BETRW TYPE STRING,
WAERS TYPE STRING,
ERNAM TYPE STRING,
ERDAT TYPE STRING,
ERTIM TYPE STRING,
AEDAT TYPE STRING,
AETIM TYPE STRING,
AENAM TYPE STRING,
XCOLLCASE TYPE STRING,
SCORE TYPE STRING,
SCORE_NEW TYPE STRING,
PERCENTAGE TYPE STRING,
XMAND TYPE STRING,
SUBSTAT TYPE STRING,
RSTIMESTAMP TYPE STRING,
ASSIGNTYP TYPE STRING,
WLINEXT TYPE STRING,
WLIDENT TYPE STRING,
CONTACTPERS TYPE STRING,
CENTER TYPE STRING,
UNIT TYPE STRING,
AGENT TYPE STRING,
ACPROF TYPE STRING,
STAKZ TYPE STRING,
STARTDATE TYPE STRING,
ENDDATE TYPE STRING,
STARTTIMESTAMP TYPE STRING,
ENDTIMESTAMP TYPE STRING,
ON_HOLD TYPE STRING,
CLOSECHECKDT TYPE STRING,
RESUBDAT TYPE STRING,
CENTERTXT TYPE STRING,
UNITTXT TYPE STRING,
AGENTTXT TYPE STRING,
WLICATTXT TYPE STRING,
STATTXT TYPE STRING,
STARTTIME TYPE STRING,
ENDTIME TYPE STRING,END OF T_EKKO_STR.
DATA: WA_FKKWLI_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_FKKWLI_STR-XMARK sy-vline 
WA_FKKWLI_STR-XUPD sy-vline 
WA_FKKWLI_STR-XCANCEL sy-vline 
WA_FKKWLI_STR-XREOPEN sy-vline 
WA_FKKWLI_STR-XSTARTD sy-vline 
WA_FKKWLI_STR-XENDD sy-vline 
WA_FKKWLI_STR-MANDT sy-vline 
WA_FKKWLI_STR-WLIGUID sy-vline 
WA_FKKWLI_STR-WLITYPE sy-vline 
WA_FKKWLI_STR-WLICAT sy-vline 
WA_FKKWLI_STR-STAT sy-vline 
WA_FKKWLI_STR-SUCCDES sy-vline 
WA_FKKWLI_STR-RSRES sy-vline 
WA_FKKWLI_STR-ASSIGNRES sy-vline 
WA_FKKWLI_STR-GPART sy-vline 
WA_FKKWLI_STR-VKGRP sy-vline 
WA_FKKWLI_STR-VTGRP sy-vline 
WA_FKKWLI_STR-GRPFIELD sy-vline 
WA_FKKWLI_STR-ITEMGRP sy-vline 
WA_FKKWLI_STR-SUBAP sy-vline 
WA_FKKWLI_STR-ORIG sy-vline 
WA_FKKWLI_STR-ORIGKEY sy-vline 
WA_FKKWLI_STR-BUKRS sy-vline 
WA_FKKWLI_STR-STRAT sy-vline 
WA_FKKWLI_STR-STEP sy-vline 
WA_FKKWLI_STR-MAHNV sy-vline 
WA_FKKWLI_STR-MAHNS sy-vline 
WA_FKKWLI_STR-ACKEY sy-vline 
WA_FKKWLI_STR-BETRW sy-vline 
WA_FKKWLI_STR-WAERS sy-vline 
WA_FKKWLI_STR-ERNAM sy-vline 
WA_FKKWLI_STR-ERDAT sy-vline 
WA_FKKWLI_STR-ERTIM sy-vline 
WA_FKKWLI_STR-AEDAT sy-vline 
WA_FKKWLI_STR-AETIM sy-vline 
WA_FKKWLI_STR-AENAM sy-vline 
WA_FKKWLI_STR-XCOLLCASE sy-vline 
WA_FKKWLI_STR-SCORE sy-vline 
WA_FKKWLI_STR-SCORE_NEW sy-vline 
WA_FKKWLI_STR-PERCENTAGE sy-vline 
WA_FKKWLI_STR-XMAND sy-vline 
WA_FKKWLI_STR-SUBSTAT sy-vline 
WA_FKKWLI_STR-RSTIMESTAMP sy-vline 
WA_FKKWLI_STR-ASSIGNTYP sy-vline 
WA_FKKWLI_STR-WLINEXT sy-vline 
WA_FKKWLI_STR-WLIDENT sy-vline 
WA_FKKWLI_STR-CONTACTPERS sy-vline 
WA_FKKWLI_STR-CENTER sy-vline 
WA_FKKWLI_STR-UNIT sy-vline 
WA_FKKWLI_STR-AGENT sy-vline 
WA_FKKWLI_STR-ACPROF sy-vline 
WA_FKKWLI_STR-STAKZ sy-vline 
WA_FKKWLI_STR-STARTDATE sy-vline 
WA_FKKWLI_STR-ENDDATE sy-vline 
WA_FKKWLI_STR-STARTTIMESTAMP sy-vline 
WA_FKKWLI_STR-ENDTIMESTAMP sy-vline 
WA_FKKWLI_STR-ON_HOLD sy-vline 
WA_FKKWLI_STR-CLOSECHECKDT sy-vline 
WA_FKKWLI_STR-RESUBDAT sy-vline 
WA_FKKWLI_STR-CENTERTXT sy-vline 
WA_FKKWLI_STR-UNITTXT sy-vline 
WA_FKKWLI_STR-AGENTTXT sy-vline 
WA_FKKWLI_STR-WLICATTXT sy-vline 
WA_FKKWLI_STR-STATTXT sy-vline 
WA_FKKWLI_STR-STARTTIME sy-vline 
WA_FKKWLI_STR-ENDTIME sy-vline      INTO ld_text SEPARATED BY SPACE.

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