ABAP Select data from SAP table FKKOP_CHANGE_COMPARE into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM FKKOP_CHANGE_COMPARE
*  INTO TABLE @DATA(IT_FKKOP_CHANGE_COMPARE2).
*--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_FKKOP_CHANGE_COMPARE INDEX 1 INTO DATA(WA_FKKOP_CHANGE_COMPARE2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<FKKOP_CHANGE_COMPARE>-MWSKZ = 1.
<FKKOP_CHANGE_COMPARE>-XANZA = 1.
<FKKOP_CHANGE_COMPARE>-STAKZ = 1.
<FKKOP_CHANGE_COMPARE>-ASTKZ = 1.
<FKKOP_CHANGE_COMPARE>-KURSF = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_FKKOP_CHANGE_COMPARE-BETRH, sy-vline,
  WA_FKKOP_CHANGE_COMPARE-BETRW, sy-vline,
  WA_FKKOP_CHANGE_COMPARE-BETR2, sy-vline,
  WA_FKKOP_CHANGE_COMPARE-BETR3, sy-vline,
  WA_FKKOP_CHANGE_COMPARE-SBETH, sy-vline,
  WA_FKKOP_CHANGE_COMPARE-SBETW, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_FKKOP_CHANGE_COMPARE 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_FKKOP_CHANGE_COMPARE 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_FKKOP_CHANGE_COMPARE INTO WA_FKKOP_CHANGE_COMPARE.


*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 EXCRT, internal->external for field KURSF
CALL FUNCTION 'CONVERSION_EXIT_EXCRT_OUTPUT'
  EXPORTING
    input =                      WA_FKKOP_CHANGE_COMPARE-KURSF
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_FKKOP_CHANGE_COMPARE-KURSF.
WRITE:/ 'New Value:', ld_input.

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

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

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

*Conversion exit CFOBR, internal->external for field CFOPN
CALL FUNCTION 'CONVERSION_EXIT_CFOBR_OUTPUT'
  EXPORTING
    input =                      WA_FKKOP_CHANGE_COMPARE-CFOPN
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_FKKOP_CHANGE_COMPARE-CFOPN.
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_FKKOP_CHANGE_COMPARE_STR, 
MWSKZ TYPE STRING,
XANZA TYPE STRING,
STAKZ TYPE STRING,
ASTKZ TYPE STRING,
KURSF TYPE STRING,
BETRH TYPE STRING,
BETRW TYPE STRING,
BETR2 TYPE STRING,
BETR3 TYPE STRING,
SBETH TYPE STRING,
SBETW TYPE STRING,
SBET2 TYPE STRING,
SBET3 TYPE STRING,
TXJCD TYPE STRING,
TXDAT TYPE STRING,
AUGOB TYPE STRING,
MWSKO TYPE STRING,
MWVKO TYPE STRING,
VBUND TYPE STRING,
BUPLA TYPE STRING,
QSSKZ TYPE STRING,
QSPTP TYPE STRING,
KONTT TYPE STRING,
KONTL TYPE STRING,
BLDAT TYPE STRING,
CFOPN TYPE STRING,
STRKZ TYPE STRING,
FAEDN TYPE STRING,
MANSP TYPE STRING,
SPZAH TYPE STRING,END OF T_EKKO_STR.
DATA: WA_FKKOP_CHANGE_COMPARE_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_FKKOP_CHANGE_COMPARE_STR-MWSKZ sy-vline 
WA_FKKOP_CHANGE_COMPARE_STR-XANZA sy-vline 
WA_FKKOP_CHANGE_COMPARE_STR-STAKZ sy-vline 
WA_FKKOP_CHANGE_COMPARE_STR-ASTKZ sy-vline 
WA_FKKOP_CHANGE_COMPARE_STR-KURSF sy-vline 
WA_FKKOP_CHANGE_COMPARE_STR-BETRH sy-vline 
WA_FKKOP_CHANGE_COMPARE_STR-BETRW sy-vline 
WA_FKKOP_CHANGE_COMPARE_STR-BETR2 sy-vline 
WA_FKKOP_CHANGE_COMPARE_STR-BETR3 sy-vline 
WA_FKKOP_CHANGE_COMPARE_STR-SBETH sy-vline 
WA_FKKOP_CHANGE_COMPARE_STR-SBETW sy-vline 
WA_FKKOP_CHANGE_COMPARE_STR-SBET2 sy-vline 
WA_FKKOP_CHANGE_COMPARE_STR-SBET3 sy-vline 
WA_FKKOP_CHANGE_COMPARE_STR-TXJCD sy-vline 
WA_FKKOP_CHANGE_COMPARE_STR-TXDAT sy-vline 
WA_FKKOP_CHANGE_COMPARE_STR-AUGOB sy-vline 
WA_FKKOP_CHANGE_COMPARE_STR-MWSKO sy-vline 
WA_FKKOP_CHANGE_COMPARE_STR-MWVKO sy-vline 
WA_FKKOP_CHANGE_COMPARE_STR-VBUND sy-vline 
WA_FKKOP_CHANGE_COMPARE_STR-BUPLA sy-vline 
WA_FKKOP_CHANGE_COMPARE_STR-QSSKZ sy-vline 
WA_FKKOP_CHANGE_COMPARE_STR-QSPTP sy-vline 
WA_FKKOP_CHANGE_COMPARE_STR-KONTT sy-vline 
WA_FKKOP_CHANGE_COMPARE_STR-KONTL sy-vline 
WA_FKKOP_CHANGE_COMPARE_STR-BLDAT sy-vline 
WA_FKKOP_CHANGE_COMPARE_STR-CFOPN sy-vline 
WA_FKKOP_CHANGE_COMPARE_STR-STRKZ sy-vline 
WA_FKKOP_CHANGE_COMPARE_STR-FAEDN sy-vline 
WA_FKKOP_CHANGE_COMPARE_STR-MANSP sy-vline 
WA_FKKOP_CHANGE_COMPARE_STR-SPZAH sy-vline      INTO ld_text SEPARATED BY SPACE.

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