ABAP Select data from SAP table KCK999 into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP KCK999 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 KCK999. 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 KCK999 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_KCK999 TYPE STANDARD TABLE OF KCK999,
      WA_KCK999 TYPE KCK999,
      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: <KCK999> TYPE KCK999.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_KCK999.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM KCK999
  INTO TABLE IT_KCK999.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM KCK999
*  INTO TABLE @DATA(IT_KCK9992).
*--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_KCK999 INDEX 1 INTO DATA(WA_KCK9992).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_KCK999 ASSIGNING <KCK999>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<KCK999>-MANDT = 1.
<KCK999>-RECNR = 1.
<KCK999>-VERSIO = 1.
<KCK999>-PLACTI = 1.
<KCK999>-YEARB = 1.

ENDLOOP.

LOOP AT IT_KCK999 INTO WA_KCK999.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_KCK999-PERDE, sy-vline,
  WA_KCK999-KEYFIG, sy-vline,
  WA_KCK999-COBJID, sy-vline,
  WA_KCK999-LANGU, sy-vline,
  WA_KCK999-XAREA, sy-vline,
  WA_KCK999-BUKRS1, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_KCK999 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_KCK999 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_KCK999 INTO WA_KCK999.


*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 VERSIO
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_KCK999-VERSIO
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_KCK999-VERSIO.
WRITE:/ 'New Value:', ld_input.

*Conversion exit GJAHR, internal->external for field YEARB
CALL FUNCTION 'CONVERSION_EXIT_GJAHR_OUTPUT'
  EXPORTING
    input =                      WA_KCK999-YEARB
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_KCK999-YEARB.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ISOLA, internal->external for field LANGU
CALL FUNCTION 'CONVERSION_EXIT_ISOLA_OUTPUT'
  EXPORTING
    input =                      WA_KCK999-LANGU
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_KCK999-LANGU.
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_KCK999_STR, 
MANDT TYPE STRING,
RECNR TYPE STRING,
VERSIO TYPE STRING,
PLACTI TYPE STRING,
YEARB TYPE STRING,
PERDE TYPE STRING,
KEYFIG TYPE STRING,
COBJID TYPE STRING,
LANGU TYPE STRING,
XAREA TYPE STRING,
BUKRS1 TYPE STRING,
BRFAM TYPE STRING,
XPROD TYPE STRING,END OF T_EKKO_STR.
DATA: WA_KCK999_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_KCK999_STR-MANDT sy-vline 
WA_KCK999_STR-RECNR sy-vline 
WA_KCK999_STR-VERSIO sy-vline 
WA_KCK999_STR-PLACTI sy-vline 
WA_KCK999_STR-YEARB sy-vline 
WA_KCK999_STR-PERDE sy-vline 
WA_KCK999_STR-KEYFIG sy-vline 
WA_KCK999_STR-COBJID sy-vline 
WA_KCK999_STR-LANGU sy-vline 
WA_KCK999_STR-XAREA sy-vline 
WA_KCK999_STR-BUKRS1 sy-vline 
WA_KCK999_STR-BRFAM sy-vline 
WA_KCK999_STR-XPROD sy-vline      INTO ld_text SEPARATED BY SPACE.

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