ABAP Select data from SAP table VEKONH into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM VEKONH
*  INTO TABLE @DATA(IT_VEKONH2).
*--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_VEKONH INDEX 1 INTO DATA(WA_VEKONH2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<VEKONH>-MANDT = 1.
<VEKONH>-KONZVER = 1.
<VEKONH>-TWAERS = 1.
<VEKONH>-AB = 1.
<VEKONH>-MASS = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_VEKONH-GRENZPR, sy-vline,
  WA_VEKONH-GRENZMNG, sy-vline,
  WA_VEKONH-PREIS, sy-vline,
  WA_VEKONH-MARK, sy-vline,
  WA_VEKONH-KZ, sy-vline,
ENDLOOP.
   
*Add any further fields from structure WA_VEKONH 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_VEKONH 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_VEKONH INTO WA_VEKONH.


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

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

*Conversion exit ALPHA, internal->external for field PREIS
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_VEKONH-PREIS
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_VEKONH-PREIS.
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_VEKONH_STR, 
MANDT TYPE STRING,
KONZVER TYPE STRING,
TWAERS TYPE STRING,
AB TYPE STRING,
MASS TYPE STRING,
GRENZPR TYPE STRING,
GRENZMNG TYPE STRING,
PREIS TYPE STRING,
MARK TYPE STRING,
KZ TYPE STRING,END OF T_EKKO_STR.
DATA: WA_VEKONH_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_VEKONH_STR-MANDT sy-vline 
WA_VEKONH_STR-KONZVER sy-vline 
WA_VEKONH_STR-TWAERS sy-vline 
WA_VEKONH_STR-AB sy-vline 
WA_VEKONH_STR-MASS sy-vline 
WA_VEKONH_STR-GRENZPR sy-vline 
WA_VEKONH_STR-GRENZMNG sy-vline 
WA_VEKONH_STR-PREIS sy-vline 
WA_VEKONH_STR-MARK sy-vline 
WA_VEKONH_STR-KZ sy-vline      INTO ld_text SEPARATED BY SPACE.

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