ABAP Select data from SAP table CSKSU into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM CSKSU
*  INTO TABLE @DATA(IT_CSKSU2).
*--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_CSKSU INDEX 1 INTO DATA(WA_CSKSU2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<CSKSU>-BKZKPUNI = 1.
<CSKSU>-BKZKSUNI = 1.
<CSKSU>-BKZERUNI = 1.
<CSKSU>-BKZOBUNI = 1.
<CSKSU>-PKZKPUNI = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_CSKSU-PKZKSUNI, sy-vline,
  WA_CSKSU-PKZERUNI, sy-vline,
  WA_CSKSU-MGEFLUNI, sy-vline,
  WA_CSKSU-WAERSUNI, sy-vline,
  WA_CSKSU-BUKRSUNI, sy-vline,
  WA_CSKSU-GSBERUNI, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_CSKSU 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_CSKSU 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_CSKSU INTO WA_CSKSU.


*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.
ENDFORM. 

*&---------------------------------------------------------------------*
*& Form process_as_string_field_values
*&---------------------------------------------------------------------*
FORM process_as_string_field_values CHANGING p_EKKO LIKE wa_EKKO.

TYPES: BEGIN OF T_CSKSU_STR, 
BKZKPUNI TYPE STRING,
BKZKSUNI TYPE STRING,
BKZERUNI TYPE STRING,
BKZOBUNI TYPE STRING,
PKZKPUNI TYPE STRING,
PKZKSUNI TYPE STRING,
PKZERUNI TYPE STRING,
MGEFLUNI TYPE STRING,
WAERSUNI TYPE STRING,
BUKRSUNI TYPE STRING,
GSBERUNI TYPE STRING,
KOSARUNI TYPE STRING,
KOMPLUNI TYPE STRING,
TXJCDUNI TYPE STRING,
VNAMEUNI TYPE STRING,
RECIDUNI TYPE STRING,
ETYPEUNI TYPE STRING,
PRCTRUNI TYPE STRING,END OF T_EKKO_STR.
DATA: WA_CSKSU_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_CSKSU_STR-BKZKPUNI sy-vline 
WA_CSKSU_STR-BKZKSUNI sy-vline 
WA_CSKSU_STR-BKZERUNI sy-vline 
WA_CSKSU_STR-BKZOBUNI sy-vline 
WA_CSKSU_STR-PKZKPUNI sy-vline 
WA_CSKSU_STR-PKZKSUNI sy-vline 
WA_CSKSU_STR-PKZERUNI sy-vline 
WA_CSKSU_STR-MGEFLUNI sy-vline 
WA_CSKSU_STR-WAERSUNI sy-vline 
WA_CSKSU_STR-BUKRSUNI sy-vline 
WA_CSKSU_STR-GSBERUNI sy-vline 
WA_CSKSU_STR-KOSARUNI sy-vline 
WA_CSKSU_STR-KOMPLUNI sy-vline 
WA_CSKSU_STR-TXJCDUNI sy-vline 
WA_CSKSU_STR-VNAMEUNI sy-vline 
WA_CSKSU_STR-RECIDUNI sy-vline 
WA_CSKSU_STR-ETYPEUNI sy-vline 
WA_CSKSU_STR-PRCTRUNI sy-vline      INTO ld_text SEPARATED BY SPACE.

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