ABAP Select data from SAP table KPS1 into internal table

Get Example source ABAP code based on a different SAP table
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Below is a number of ABAP code snippets to demonstrate how to select data from SAP KPS1 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 KPS1. 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 KPS1 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_KPS1 TYPE STANDARD TABLE OF KPS1,
      WA_KPS1 TYPE KPS1,
      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: <KPS1> TYPE KPS1.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_KPS1.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM KPS1
  INTO TABLE IT_KPS1.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM KPS1
*  INTO TABLE @DATA(IT_KPS12).
*--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_KPS1 INDEX 1 INTO DATA(WA_KPS12).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_KPS1 ASSIGNING <KPS1>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<KPS1>-MANDT = 1.
<KPS1>-KOKRS = 1.
<KPS1>-KALNR = 1.
<KPS1>-WTTYP = 1.
<KPS1>-VERSN = 1.

ENDLOOP.

LOOP AT IT_KPS1 INTO WA_KPS1.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_KPS1-POSNR, sy-vline,
  WA_KPS1-STATP, sy-vline,
  WA_KPS1-STRGP, sy-vline,
  WA_KPS1-TYPPS, sy-vline,
  WA_KPS1-KSTAR, sy-vline,
  WA_KPS1-FVFLG, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_KPS1 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_KPS1 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_KPS1 INTO WA_KPS1.


*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_KPS1-KSTAR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_KPS1-KSTAR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit MATN1, internal->external for field MATNR
CALL FUNCTION 'CONVERSION_EXIT_MATN1_OUTPUT'
  EXPORTING
    input =                      WA_KPS1-MATNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_KPS1-MATNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field EXTNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_KPS1-EXTNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_KPS1-EXTNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field MEEHT
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_KPS1-MEEHT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_KPS1-MEEHT.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ISOLA, internal->external for field SPRAS
CALL FUNCTION 'CONVERSION_EXIT_ISOLA_OUTPUT'
  EXPORTING
    input =                      WA_KPS1-SPRAS
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_KPS1-SPRAS.
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_KPS1_STR, 
MANDT TYPE STRING,
KOKRS TYPE STRING,
KALNR TYPE STRING,
WTTYP TYPE STRING,
VERSN TYPE STRING,
POSNR TYPE STRING,
STATP TYPE STRING,
STRGP TYPE STRING,
TYPPS TYPE STRING,
KSTAR TYPE STRING,
FVFLG TYPE STRING,
OPCOD TYPE STRING,
FRLNR TYPE STRING,
BUKRS TYPE STRING,
WERKS TYPE STRING,
MATNR TYPE STRING,
PSCHL TYPE STRING,
KOKRS_HRK TYPE STRING,
EXTNR TYPE STRING,
GPREIS TYPE STRING,
WERTB TYPE STRING,
WERTN TYPE STRING,
WERTF TYPE STRING,
FWAER TYPE STRING,
MKURS TYPE STRING,
FWEHT TYPE STRING,
MENGE TYPE STRING,
MEEHT TYPE STRING,
SUMM1 TYPE STRING,
SUMM2 TYPE STRING,
SUMM3 TYPE STRING,
DPREIS TYPE STRING,
PREIS1 TYPE STRING,
PREIS2 TYPE STRING,
PREIS3 TYPE STRING,
PREIS4 TYPE STRING,
PREIS5 TYPE STRING,
PFKT1 TYPE STRING,
PFKT2 TYPE STRING,
PFKT3 TYPE STRING,
PFKT4 TYPE STRING,
PFKT5 TYPE STRING,
ZUABS TYPE STRING,
ZUFKT TYPE STRING,
PSKNZ TYPE STRING,
VTKNZ TYPE STRING,
SPRAS TYPE STRING,
TXN08 TYPE STRING,
LTEXT TYPE STRING,END OF T_EKKO_STR.
DATA: WA_KPS1_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_KPS1_STR-MANDT sy-vline 
WA_KPS1_STR-KOKRS sy-vline 
WA_KPS1_STR-KALNR sy-vline 
WA_KPS1_STR-WTTYP sy-vline 
WA_KPS1_STR-VERSN sy-vline 
WA_KPS1_STR-POSNR sy-vline 
WA_KPS1_STR-STATP sy-vline 
WA_KPS1_STR-STRGP sy-vline 
WA_KPS1_STR-TYPPS sy-vline 
WA_KPS1_STR-KSTAR sy-vline 
WA_KPS1_STR-FVFLG sy-vline 
WA_KPS1_STR-OPCOD sy-vline 
WA_KPS1_STR-FRLNR sy-vline 
WA_KPS1_STR-BUKRS sy-vline 
WA_KPS1_STR-WERKS sy-vline 
WA_KPS1_STR-MATNR sy-vline 
WA_KPS1_STR-PSCHL sy-vline 
WA_KPS1_STR-KOKRS_HRK sy-vline 
WA_KPS1_STR-EXTNR sy-vline 
WA_KPS1_STR-GPREIS sy-vline 
WA_KPS1_STR-WERTB sy-vline 
WA_KPS1_STR-WERTN sy-vline 
WA_KPS1_STR-WERTF sy-vline 
WA_KPS1_STR-FWAER sy-vline 
WA_KPS1_STR-MKURS sy-vline 
WA_KPS1_STR-FWEHT sy-vline 
WA_KPS1_STR-MENGE sy-vline 
WA_KPS1_STR-MEEHT sy-vline 
WA_KPS1_STR-SUMM1 sy-vline 
WA_KPS1_STR-SUMM2 sy-vline 
WA_KPS1_STR-SUMM3 sy-vline 
WA_KPS1_STR-DPREIS sy-vline 
WA_KPS1_STR-PREIS1 sy-vline 
WA_KPS1_STR-PREIS2 sy-vline 
WA_KPS1_STR-PREIS3 sy-vline 
WA_KPS1_STR-PREIS4 sy-vline 
WA_KPS1_STR-PREIS5 sy-vline 
WA_KPS1_STR-PFKT1 sy-vline 
WA_KPS1_STR-PFKT2 sy-vline 
WA_KPS1_STR-PFKT3 sy-vline 
WA_KPS1_STR-PFKT4 sy-vline 
WA_KPS1_STR-PFKT5 sy-vline 
WA_KPS1_STR-ZUABS sy-vline 
WA_KPS1_STR-ZUFKT sy-vline 
WA_KPS1_STR-PSKNZ sy-vline 
WA_KPS1_STR-VTKNZ sy-vline 
WA_KPS1_STR-SPRAS sy-vline 
WA_KPS1_STR-TXN08 sy-vline 
WA_KPS1_STR-LTEXT sy-vline      INTO ld_text SEPARATED BY SPACE.

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