ABAP Select data from SAP table EKVKP into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM EKVKP
*  INTO TABLE @DATA(IT_EKVKP2).
*--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_EKVKP INDEX 1 INTO DATA(WA_EKVKP2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<EKVKP>-VKPOS = 1.
<EKVKP>-WAEOS = 1.
<EKVKP>-KPEOS = 1.
<EKVKP>-KMEOS = 1.
<EKVKP>-EANOS = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_EKVKP-VKPMS, sy-vline,
  WA_EKVKP-WAEMS, sy-vline,
  WA_EKVKP-KPEMS, sy-vline,
  WA_EKVKP-KMEMS, sy-vline,
  WA_EKVKP-EANMS, sy-vline,
ENDLOOP.
   
*Add any further fields from structure WA_EKVKP 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_EKVKP 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_EKVKP INTO WA_EKVKP.


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

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

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

*Conversion exit EAN11, internal->external for field EANMS
CALL FUNCTION 'CONVERSION_EXIT_EAN11_OUTPUT'
  EXPORTING
    input =                      WA_EKVKP-EANMS
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_EKVKP-EANMS.
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_EKVKP_STR, 
VKPOS TYPE STRING,
WAEOS TYPE STRING,
KPEOS TYPE STRING,
KMEOS TYPE STRING,
EANOS TYPE STRING,
VKPMS TYPE STRING,
WAEMS TYPE STRING,
KPEMS TYPE STRING,
KMEMS TYPE STRING,
EANMS TYPE STRING,END OF T_EKKO_STR.
DATA: WA_EKVKP_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_EKVKP_STR-VKPOS sy-vline 
WA_EKVKP_STR-WAEOS sy-vline 
WA_EKVKP_STR-KPEOS sy-vline 
WA_EKVKP_STR-KMEOS sy-vline 
WA_EKVKP_STR-EANOS sy-vline 
WA_EKVKP_STR-VKPMS sy-vline 
WA_EKVKP_STR-WAEMS sy-vline 
WA_EKVKP_STR-KPEMS sy-vline 
WA_EKVKP_STR-KMEMS sy-vline 
WA_EKVKP_STR-EANMS sy-vline      INTO ld_text SEPARATED BY SPACE.

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