ABAP Select data from SAP table WKKALP into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM WKKALP
*  INTO TABLE @DATA(IT_WKKALP2).
*--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_WKKALP INDEX 1 INTO DATA(WA_WKKALP2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<WKKALP>-MATNR = 1.
<WKKALP>-VRKME = 1.
<WKKALP>-EAN11 = 1.
<WKKALP>-VKORG = 1.
<WKKALP>-VTWEG = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_WKKALP-WERKS, sy-vline,
  WA_WKKALP-PLTYP, sy-vline,
  WA_WKKALP-BGINT, sy-vline,
  WA_WKKALP-WKPOS, sy-vline,
  WA_WKKALP-WKMPO, sy-vline,
  WA_WKKALP-WWAER, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_WKKALP 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_WKKALP 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_WKKALP INTO WA_WKKALP.


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

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

*Conversion exit EAN11, internal->external for field EAN11
CALL FUNCTION 'CONVERSION_EXIT_EAN11_OUTPUT'
  EXPORTING
    input =                      WA_WKKALP-EAN11
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_WKKALP-EAN11.
WRITE:/ 'New Value:', ld_input.

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

*Conversion exit MATN1, internal->external for field PMATA
CALL FUNCTION 'CONVERSION_EXIT_MATN1_OUTPUT'
  EXPORTING
    input =                      WA_WKKALP-PMATA
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_WKKALP-PMATA.
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_WKKALP_STR, 
MATNR TYPE STRING,
VRKME TYPE STRING,
EAN11 TYPE STRING,
VKORG TYPE STRING,
VTWEG TYPE STRING,
WERKS TYPE STRING,
PLTYP TYPE STRING,
BGINT TYPE STRING,
WKPOS TYPE STRING,
WKMPO TYPE STRING,
WWAER TYPE STRING,
KALEB TYPE STRING,
KZRWC TYPE STRING,
KZRWM TYPE STRING,
MAKTX TYPE STRING,
KWAER TYPE STRING,
EKPNN TYPE STRING,
EKDIV TYPE STRING,
EAMNG TYPE STRING,
KAMNG TYPE STRING,
EKWRT TYPE STRING,
VWAER TYPE STRING,
VORPR TYPE STRING,
VPDIV TYPE STRING,
PENDR TYPE STRING,
PPDIV TYPE STRING,
ENDPR TYPE STRING,
VKDIV TYPE STRING,
VKPNE TYPE STRING,
SPANE TYPE STRING,
UMWRT TYPE STRING,
ERWRT TYPE STRING,
ENDPA TYPE STRING,
EADIV TYPE STRING,
VKPNA TYPE STRING,
SPANA TYPE STRING,
AUWRT TYPE STRING,
AEWRT TYPE STRING,
ERAEN TYPE STRING,
UMAEP TYPE STRING,
ERAEP TYPE STRING,
UPDKZ TYPE STRING,
SUBRC TYPE STRING,
ICON4 TYPE STRING,
ATTYP TYPE STRING,
SATNR TYPE STRING,
PMATA TYPE STRING,
PMDIV TYPE STRING,
CSTF1 TYPE STRING,
CSTF2 TYPE STRING,
CSTF3 TYPE STRING,
CSTF4 TYPE STRING,
CSTF5 TYPE STRING,
ICON132 TYPE STRING,
MATNR132 TYPE STRING,
WERKS132 TYPE STRING,END OF T_EKKO_STR.
DATA: WA_WKKALP_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_WKKALP_STR-MATNR sy-vline 
WA_WKKALP_STR-VRKME sy-vline 
WA_WKKALP_STR-EAN11 sy-vline 
WA_WKKALP_STR-VKORG sy-vline 
WA_WKKALP_STR-VTWEG sy-vline 
WA_WKKALP_STR-WERKS sy-vline 
WA_WKKALP_STR-PLTYP sy-vline 
WA_WKKALP_STR-BGINT sy-vline 
WA_WKKALP_STR-WKPOS sy-vline 
WA_WKKALP_STR-WKMPO sy-vline 
WA_WKKALP_STR-WWAER sy-vline 
WA_WKKALP_STR-KALEB sy-vline 
WA_WKKALP_STR-KZRWC sy-vline 
WA_WKKALP_STR-KZRWM sy-vline 
WA_WKKALP_STR-MAKTX sy-vline 
WA_WKKALP_STR-KWAER sy-vline 
WA_WKKALP_STR-EKPNN sy-vline 
WA_WKKALP_STR-EKDIV sy-vline 
WA_WKKALP_STR-EAMNG sy-vline 
WA_WKKALP_STR-KAMNG sy-vline 
WA_WKKALP_STR-EKWRT sy-vline 
WA_WKKALP_STR-VWAER sy-vline 
WA_WKKALP_STR-VORPR sy-vline 
WA_WKKALP_STR-VPDIV sy-vline 
WA_WKKALP_STR-PENDR sy-vline 
WA_WKKALP_STR-PPDIV sy-vline 
WA_WKKALP_STR-ENDPR sy-vline 
WA_WKKALP_STR-VKDIV sy-vline 
WA_WKKALP_STR-VKPNE sy-vline 
WA_WKKALP_STR-SPANE sy-vline 
WA_WKKALP_STR-UMWRT sy-vline 
WA_WKKALP_STR-ERWRT sy-vline 
WA_WKKALP_STR-ENDPA sy-vline 
WA_WKKALP_STR-EADIV sy-vline 
WA_WKKALP_STR-VKPNA sy-vline 
WA_WKKALP_STR-SPANA sy-vline 
WA_WKKALP_STR-AUWRT sy-vline 
WA_WKKALP_STR-AEWRT sy-vline 
WA_WKKALP_STR-ERAEN sy-vline 
WA_WKKALP_STR-UMAEP sy-vline 
WA_WKKALP_STR-ERAEP sy-vline 
WA_WKKALP_STR-UPDKZ sy-vline 
WA_WKKALP_STR-SUBRC sy-vline 
WA_WKKALP_STR-ICON4 sy-vline 
WA_WKKALP_STR-ATTYP sy-vline 
WA_WKKALP_STR-SATNR sy-vline 
WA_WKKALP_STR-PMATA sy-vline 
WA_WKKALP_STR-PMDIV sy-vline 
WA_WKKALP_STR-CSTF1 sy-vline 
WA_WKKALP_STR-CSTF2 sy-vline 
WA_WKKALP_STR-CSTF3 sy-vline 
WA_WKKALP_STR-CSTF4 sy-vline 
WA_WKKALP_STR-CSTF5 sy-vline 
WA_WKKALP_STR-ICON132 sy-vline 
WA_WKKALP_STR-MATNR132 sy-vline 
WA_WKKALP_STR-WERKS132 sy-vline      INTO ld_text SEPARATED BY SPACE.

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