ABAP Select data from SAP table KSS01 into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP KSS01 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 KSS01. 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 KSS01 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_KSS01 TYPE STANDARD TABLE OF KSS01,
      WA_KSS01 TYPE KSS01,
      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: <KSS01> TYPE KSS01.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_KSS01.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM KSS01
  INTO TABLE IT_KSS01.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM KSS01
*  INTO TABLE @DATA(IT_KSS012).
*--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_KSS01 INDEX 1 INTO DATA(WA_KSS012).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_KSS01 ASSIGNING <KSS01>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<KSS01>-PZGS = 1.
<KSS01>-PZFS = 1.
<KSS01>-PZVS = 1.
<KSS01>-WKGIG = 1.
<KSS01>-WKGIGU = 1.

ENDLOOP.

LOOP AT IT_KSS01 INTO WA_KSS01.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_KSS01-WKFIG, sy-vline,
  WA_KSS01-WKFIGS, sy-vline,
  WA_KSS01-WKFIGR, sy-vline,
  WA_KSS01-WKVIG, sy-vline,
  WA_KSS01-WKGIA, sy-vline,
  WA_KSS01-WKGFIXVO, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_KSS01 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_KSS01 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_KSS01 INTO WA_KSS01.


*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 AC152, internal->external for field WKGIG
CALL FUNCTION 'CONVERSION_EXIT_AC152_OUTPUT'
  EXPORTING
    input =                      WA_KSS01-WKGIG
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_KSS01-WKGIG.
WRITE:/ 'New Value:', ld_input.

*Conversion exit AC152, internal->external for field WKGIGU
CALL FUNCTION 'CONVERSION_EXIT_AC152_OUTPUT'
  EXPORTING
    input =                      WA_KSS01-WKGIGU
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_KSS01-WKGIGU.
WRITE:/ 'New Value:', ld_input.

*Conversion exit AC152, internal->external for field WKFIG
CALL FUNCTION 'CONVERSION_EXIT_AC152_OUTPUT'
  EXPORTING
    input =                      WA_KSS01-WKFIG
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_KSS01-WKFIG.
WRITE:/ 'New Value:', ld_input.

*Conversion exit AC152, internal->external for field WKFIGS
CALL FUNCTION 'CONVERSION_EXIT_AC152_OUTPUT'
  EXPORTING
    input =                      WA_KSS01-WKFIGS
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_KSS01-WKFIGS.
WRITE:/ 'New Value:', ld_input.

*Conversion exit AC152, internal->external for field WKFIGR
CALL FUNCTION 'CONVERSION_EXIT_AC152_OUTPUT'
  EXPORTING
    input =                      WA_KSS01-WKFIGR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_KSS01-WKFIGR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit AC152, internal->external for field WKVIG
CALL FUNCTION 'CONVERSION_EXIT_AC152_OUTPUT'
  EXPORTING
    input =                      WA_KSS01-WKVIG
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_KSS01-WKVIG.
WRITE:/ 'New Value:', ld_input.

*Conversion exit AC152, internal->external for field WKGIA
CALL FUNCTION 'CONVERSION_EXIT_AC152_OUTPUT'
  EXPORTING
    input =                      WA_KSS01-WKGIA
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_KSS01-WKGIA.
WRITE:/ 'New Value:', ld_input.

*Conversion exit AC152, internal->external for field WKGFIXVO
CALL FUNCTION 'CONVERSION_EXIT_AC152_OUTPUT'
  EXPORTING
    input =                      WA_KSS01-WKGFIXVO
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_KSS01-WKGFIXVO.
WRITE:/ 'New Value:', ld_input.

*Conversion exit AC152, internal->external for field WKFIA
CALL FUNCTION 'CONVERSION_EXIT_AC152_OUTPUT'
  EXPORTING
    input =                      WA_KSS01-WKFIA
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_KSS01-WKFIA.
WRITE:/ 'New Value:', ld_input.

*Conversion exit AC152, internal->external for field WKVIA
CALL FUNCTION 'CONVERSION_EXIT_AC152_OUTPUT'
  EXPORTING
    input =                      WA_KSS01-WKVIA
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_KSS01-WKVIA.
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_KSS01_STR, 
PZGS TYPE STRING,
PZFS TYPE STRING,
PZVS TYPE STRING,
WKGIG TYPE STRING,
WKGIGU TYPE STRING,
WKFIG TYPE STRING,
WKFIGS TYPE STRING,
WKFIGR TYPE STRING,
WKVIG TYPE STRING,
WKGIA TYPE STRING,
WKGFIXVO TYPE STRING,
WKFIA TYPE STRING,
WKVIA TYPE STRING,
AEQUI TYPE STRING,
PZAEQ TYPE STRING,END OF T_EKKO_STR.
DATA: WA_KSS01_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_KSS01_STR-PZGS sy-vline 
WA_KSS01_STR-PZFS sy-vline 
WA_KSS01_STR-PZVS sy-vline 
WA_KSS01_STR-WKGIG sy-vline 
WA_KSS01_STR-WKGIGU sy-vline 
WA_KSS01_STR-WKFIG sy-vline 
WA_KSS01_STR-WKFIGS sy-vline 
WA_KSS01_STR-WKFIGR sy-vline 
WA_KSS01_STR-WKVIG sy-vline 
WA_KSS01_STR-WKGIA sy-vline 
WA_KSS01_STR-WKGFIXVO sy-vline 
WA_KSS01_STR-WKFIA sy-vline 
WA_KSS01_STR-WKVIA sy-vline 
WA_KSS01_STR-AEQUI sy-vline 
WA_KSS01_STR-PZAEQ sy-vline      INTO ld_text SEPARATED BY SPACE.

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