ABAP Select data from SAP table CLF_KSSK_D into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM CLF_KSSK_D
*  INTO TABLE @DATA(IT_CLF_KSSK_D2).
*--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_CLF_KSSK_D INDEX 1 INTO DATA(WA_CLF_KSSK_D2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<CLF_KSSK_D>-MANDT = 1.
<CLF_KSSK_D>-DRAFT_KEY = 1.
<CLF_KSSK_D>-CLINT = 1.
<CLF_KSSK_D>-OBJEK = 1.
<CLF_KSSK_D>-KLART = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_CLF_KSSK_D-MAFID, sy-vline,
  WA_CLF_KSSK_D-ADZHL, sy-vline,
  WA_CLF_KSSK_D-ZAEHL, sy-vline,
  WA_CLF_KSSK_D-STATU, sy-vline,
  WA_CLF_KSSK_D-STDCL, sy-vline,
  WA_CLF_KSSK_D-CLASS, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_CLF_KSSK_D 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_CLF_KSSK_D 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_CLF_KSSK_D INTO WA_CLF_KSSK_D.


*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 AENNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_CLF_KSSK_D-AENNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_CLF_KSSK_D-AENNR.
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_CLF_KSSK_D_STR, 
MANDT TYPE STRING,
DRAFT_KEY TYPE STRING,
CLINT TYPE STRING,
OBJEK TYPE STRING,
KLART TYPE STRING,
MAFID TYPE STRING,
ADZHL TYPE STRING,
ZAEHL TYPE STRING,
STATU TYPE STRING,
STDCL TYPE STRING,
CLASS TYPE STRING,
KSCHL TYPE STRING,
UPDAT TYPE STRING,
D_DATABASE TYPE STRING,
DELKZ TYPE STRING,
SICHT TYPE STRING,
D_LOCK TYPE STRING,
PRAUS TYPE STRING,
VWSTL TYPE STRING,
CUOBJ TYPE STRING,
OCLINT TYPE STRING,
OBTAB TYPE STRING,
AENNR TYPE STRING,
DATUV TYPE STRING,
VBKZ TYPE STRING,END OF T_EKKO_STR.
DATA: WA_CLF_KSSK_D_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_CLF_KSSK_D_STR-MANDT sy-vline 
WA_CLF_KSSK_D_STR-DRAFT_KEY sy-vline 
WA_CLF_KSSK_D_STR-CLINT sy-vline 
WA_CLF_KSSK_D_STR-OBJEK sy-vline 
WA_CLF_KSSK_D_STR-KLART sy-vline 
WA_CLF_KSSK_D_STR-MAFID sy-vline 
WA_CLF_KSSK_D_STR-ADZHL sy-vline 
WA_CLF_KSSK_D_STR-ZAEHL sy-vline 
WA_CLF_KSSK_D_STR-STATU sy-vline 
WA_CLF_KSSK_D_STR-STDCL sy-vline 
WA_CLF_KSSK_D_STR-CLASS sy-vline 
WA_CLF_KSSK_D_STR-KSCHL sy-vline 
WA_CLF_KSSK_D_STR-UPDAT sy-vline 
WA_CLF_KSSK_D_STR-D_DATABASE sy-vline 
WA_CLF_KSSK_D_STR-DELKZ sy-vline 
WA_CLF_KSSK_D_STR-SICHT sy-vline 
WA_CLF_KSSK_D_STR-D_LOCK sy-vline 
WA_CLF_KSSK_D_STR-PRAUS sy-vline 
WA_CLF_KSSK_D_STR-VWSTL sy-vline 
WA_CLF_KSSK_D_STR-CUOBJ sy-vline 
WA_CLF_KSSK_D_STR-OCLINT sy-vline 
WA_CLF_KSSK_D_STR-OBTAB sy-vline 
WA_CLF_KSSK_D_STR-AENNR sy-vline 
WA_CLF_KSSK_D_STR-DATUV sy-vline 
WA_CLF_KSSK_D_STR-VBKZ sy-vline      INTO ld_text SEPARATED BY SPACE.

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