ABAP Select data from SAP table KSS02 into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP KSS02 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 KSS02. 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 KSS02 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_KSS02 TYPE STANDARD TABLE OF KSS02,
      WA_KSS02 TYPE KSS02,
      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: <KSS02> TYPE KSS02.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_KSS02.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM KSS02
  INTO TABLE IT_KSS02.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM KSS02
*  INTO TABLE @DATA(IT_KSS022).
*--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_KSS02 INDEX 1 INTO DATA(WA_KSS022).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_KSS02 ASSIGNING <KSS02>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<KSS02>-OBJNR = 1.
<KSS02>-KSTAR = 1.
<KSS02>-HRKFT = 1.
<KSS02>-KAGRU = 1.
<KSS02>-VRGNG = 1.

ENDLOOP.

LOOP AT IT_KSS02 INTO WA_KSS02.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_KSS02-PAROB, sy-vline,
  WA_KSS02-BEKNZ, sy-vline,
  WA_KSS02-AFTEI, sy-vline,
  WA_KSS02-WKGBTR, sy-vline,
  WA_KSS02-WKFBTR, sy-vline,
  WA_KSS02-WKFIS, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_KSS02 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_KSS02 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_KSS02 INTO WA_KSS02.


*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 KSTAR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_KSS02-KSTAR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_KSS02-KSTAR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit BEKNZ, internal->external for field BEKNZ
CALL FUNCTION 'CONVERSION_EXIT_BEKNZ_OUTPUT'
  EXPORTING
    input =                      WA_KSS02-BEKNZ
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_KSS02-BEKNZ.
WRITE:/ 'New Value:', ld_input.

*Conversion exit AC152, internal->external for field WKGBTR
CALL FUNCTION 'CONVERSION_EXIT_AC152_OUTPUT'
  EXPORTING
    input =                      WA_KSS02-WKGBTR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_KSS02-WKGBTR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit AC152, internal->external for field WKFBTR
CALL FUNCTION 'CONVERSION_EXIT_AC152_OUTPUT'
  EXPORTING
    input =                      WA_KSS02-WKFBTR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_KSS02-WKFBTR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit AC152, internal->external for field WKFIS
CALL FUNCTION 'CONVERSION_EXIT_AC152_OUTPUT'
  EXPORTING
    input =                      WA_KSS02-WKFIS
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_KSS02-WKFIS.
WRITE:/ 'New Value:', ld_input.

*Conversion exit AC152, internal->external for field PAGBTR
CALL FUNCTION 'CONVERSION_EXIT_AC152_OUTPUT'
  EXPORTING
    input =                      WA_KSS02-PAGBTR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_KSS02-PAGBTR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit AC152, internal->external for field PAFBTR
CALL FUNCTION 'CONVERSION_EXIT_AC152_OUTPUT'
  EXPORTING
    input =                      WA_KSS02-PAFBTR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_KSS02-PAFBTR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field MEINH
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_KSS02-MEINH
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_KSS02-MEINH.
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_KSS02_STR, 
OBJNR TYPE STRING,
KSTAR TYPE STRING,
HRKFT TYPE STRING,
KAGRU TYPE STRING,
VRGNG TYPE STRING,
PAROB TYPE STRING,
BEKNZ TYPE STRING,
AFTEI TYPE STRING,
WKGBTR TYPE STRING,
WKFBTR TYPE STRING,
WKFIS TYPE STRING,
PAGBTR TYPE STRING,
PAFBTR TYPE STRING,
MEGBTR TYPE STRING,
MEFBTR TYPE STRING,
MEINH TYPE STRING,END OF T_EKKO_STR.
DATA: WA_KSS02_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_KSS02_STR-OBJNR sy-vline 
WA_KSS02_STR-KSTAR sy-vline 
WA_KSS02_STR-HRKFT sy-vline 
WA_KSS02_STR-KAGRU sy-vline 
WA_KSS02_STR-VRGNG sy-vline 
WA_KSS02_STR-PAROB sy-vline 
WA_KSS02_STR-BEKNZ sy-vline 
WA_KSS02_STR-AFTEI sy-vline 
WA_KSS02_STR-WKGBTR sy-vline 
WA_KSS02_STR-WKFBTR sy-vline 
WA_KSS02_STR-WKFIS sy-vline 
WA_KSS02_STR-PAGBTR sy-vline 
WA_KSS02_STR-PAFBTR sy-vline 
WA_KSS02_STR-MEGBTR sy-vline 
WA_KSS02_STR-MEFBTR sy-vline 
WA_KSS02_STR-MEINH sy-vline      INTO ld_text SEPARATED BY SPACE.

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