ABAP Select data from SAP table KKBKENNZ into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM KKBKENNZ
*  INTO TABLE @DATA(IT_KKBKENNZ2).
*--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_KKBKENNZ INDEX 1 INTO DATA(WA_KKBKENNZ2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<KKBKENNZ>-GJPER = 1.
<KKBKENNZ>-PLGES = 1.
<KKBKENNZ>-PLFIX = 1.
<KKBKENNZ>-PLSTAT = 1.
<KKBKENNZ>-ISGES = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_KKBKENNZ-ISFIX, sy-vline,
  WA_KKBKENNZ-ISSTAT, sy-vline,
  WA_KKBKENNZ-ISBELFIX, sy-vline,
  WA_KKBKENNZ-ISBELGES, sy-vline,
  WA_KKBKENNZ-SOGES, sy-vline,
  WA_KKBKENNZ-SOFIX, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_KKBKENNZ 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_KKBKENNZ 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_KKBKENNZ INTO WA_KKBKENNZ.


*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 PERI7, internal->external for field GJPER
CALL FUNCTION 'CONVERSION_EXIT_PERI7_OUTPUT'
  EXPORTING
    input =                      WA_KKBKENNZ-GJPER
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_KKBKENNZ-GJPER.
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_KKBKENNZ_STR, 
GJPER TYPE STRING,
PLGES TYPE STRING,
PLFIX TYPE STRING,
PLSTAT TYPE STRING,
ISGES TYPE STRING,
ISFIX TYPE STRING,
ISSTAT TYPE STRING,
ISBELFIX TYPE STRING,
ISBELGES TYPE STRING,
SOGES TYPE STRING,
SOFIX TYPE STRING,
OBGES TYPE STRING,
APGES TYPE STRING,
APFIX TYPE STRING,
AMGES TYPE STRING,
AMFIX TYPE STRING,
ASGES TYPE STRING,
ASFIX TYPE STRING,
ALGES TYPE STRING,
ALFIX TYPE STRING,
AWGES TYPE STRING,
AWFIX TYPE STRING,
AAGES TYPE STRING,
AAFIX TYPE STRING,
AEGES TYPE STRING,
AEFIX TYPE STRING,
ARGES TYPE STRING,
ARFIX TYPE STRING,
MPGES TYPE STRING,
MIGES TYPE STRING,
WIPGS TYPE STRING,
WIPFX TYPE STRING,
KENW1 TYPE STRING,
KENW2 TYPE STRING,
KENW3 TYPE STRING,
KENW4 TYPE STRING,
KENW5 TYPE STRING,
KENW6 TYPE STRING,
KENM1 TYPE STRING,
KENM2 TYPE STRING,
KENM3 TYPE STRING,
KENM4 TYPE STRING,
AVGES TYPE STRING,
AVFIX TYPE STRING,END OF T_EKKO_STR.
DATA: WA_KKBKENNZ_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_KKBKENNZ_STR-GJPER sy-vline 
WA_KKBKENNZ_STR-PLGES sy-vline 
WA_KKBKENNZ_STR-PLFIX sy-vline 
WA_KKBKENNZ_STR-PLSTAT sy-vline 
WA_KKBKENNZ_STR-ISGES sy-vline 
WA_KKBKENNZ_STR-ISFIX sy-vline 
WA_KKBKENNZ_STR-ISSTAT sy-vline 
WA_KKBKENNZ_STR-ISBELFIX sy-vline 
WA_KKBKENNZ_STR-ISBELGES sy-vline 
WA_KKBKENNZ_STR-SOGES sy-vline 
WA_KKBKENNZ_STR-SOFIX sy-vline 
WA_KKBKENNZ_STR-OBGES sy-vline 
WA_KKBKENNZ_STR-APGES sy-vline 
WA_KKBKENNZ_STR-APFIX sy-vline 
WA_KKBKENNZ_STR-AMGES sy-vline 
WA_KKBKENNZ_STR-AMFIX sy-vline 
WA_KKBKENNZ_STR-ASGES sy-vline 
WA_KKBKENNZ_STR-ASFIX sy-vline 
WA_KKBKENNZ_STR-ALGES sy-vline 
WA_KKBKENNZ_STR-ALFIX sy-vline 
WA_KKBKENNZ_STR-AWGES sy-vline 
WA_KKBKENNZ_STR-AWFIX sy-vline 
WA_KKBKENNZ_STR-AAGES sy-vline 
WA_KKBKENNZ_STR-AAFIX sy-vline 
WA_KKBKENNZ_STR-AEGES sy-vline 
WA_KKBKENNZ_STR-AEFIX sy-vline 
WA_KKBKENNZ_STR-ARGES sy-vline 
WA_KKBKENNZ_STR-ARFIX sy-vline 
WA_KKBKENNZ_STR-MPGES sy-vline 
WA_KKBKENNZ_STR-MIGES sy-vline 
WA_KKBKENNZ_STR-WIPGS sy-vline 
WA_KKBKENNZ_STR-WIPFX sy-vline 
WA_KKBKENNZ_STR-KENW1 sy-vline 
WA_KKBKENNZ_STR-KENW2 sy-vline 
WA_KKBKENNZ_STR-KENW3 sy-vline 
WA_KKBKENNZ_STR-KENW4 sy-vline 
WA_KKBKENNZ_STR-KENW5 sy-vline 
WA_KKBKENNZ_STR-KENW6 sy-vline 
WA_KKBKENNZ_STR-KENM1 sy-vline 
WA_KKBKENNZ_STR-KENM2 sy-vline 
WA_KKBKENNZ_STR-KENM3 sy-vline 
WA_KKBKENNZ_STR-KENM4 sy-vline 
WA_KKBKENNZ_STR-AVGES sy-vline 
WA_KKBKENNZ_STR-AVFIX sy-vline      INTO ld_text SEPARATED BY SPACE.

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