ABAP Select data from SAP table VIGWMEKOND into internal table

Get Example source ABAP code based on a different SAP table
  Get ABAP code

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM VIGWMEKOND
*  INTO TABLE @DATA(IT_VIGWMEKOND2).
*--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_VIGWMEKOND INDEX 1 INTO DATA(WA_VIGWMEKOND2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<VIGWMEKOND>-ME_INTRENO = 1.
<VIGWMEKOND>-SFLART = 1.
<VIGWMEKOND>-SKOART = 1.
<VIGWMEKOND>-DGULAB = 1.
<VIGWMEKOND>-DGULBIS = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_VIGWMEKOND-FLAG, sy-vline,
  WA_VIGWMEKOND-MWLEERS, sy-vline,
  WA_VIGWMEKOND-MWMARKT, sy-vline,
  WA_VIGWMEKOND-MWKOSTN, sy-vline,
  WA_VIGWMEKOND-MWISTMV, sy-vline,
  WA_VIGWMEKOND-MWALTMV, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_VIGWMEKOND 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_VIGWMEKOND 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_VIGWMEKOND INTO WA_VIGWMEKOND.


*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 FEINH
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_VIGWMEKOND-FEINH
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_VIGWMEKOND-FEINH.
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_VIGWMEKOND_STR, 
ME_INTRENO TYPE STRING,
SFLART TYPE STRING,
SKOART TYPE STRING,
DGULAB TYPE STRING,
DGULBIS TYPE STRING,
FLAG TYPE STRING,
MWLEERS TYPE STRING,
MWMARKT TYPE STRING,
MWKOSTN TYPE STRING,
MWISTMV TYPE STRING,
MWALTMV TYPE STRING,
WHRMKLBW TYPE STRING,
WHRISTMV TYPE STRING,
FLKGR TYPE STRING,
FEINH TYPE STRING,END OF T_EKKO_STR.
DATA: WA_VIGWMEKOND_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_VIGWMEKOND_STR-ME_INTRENO sy-vline 
WA_VIGWMEKOND_STR-SFLART sy-vline 
WA_VIGWMEKOND_STR-SKOART sy-vline 
WA_VIGWMEKOND_STR-DGULAB sy-vline 
WA_VIGWMEKOND_STR-DGULBIS sy-vline 
WA_VIGWMEKOND_STR-FLAG sy-vline 
WA_VIGWMEKOND_STR-MWLEERS sy-vline 
WA_VIGWMEKOND_STR-MWMARKT sy-vline 
WA_VIGWMEKOND_STR-MWKOSTN sy-vline 
WA_VIGWMEKOND_STR-MWISTMV sy-vline 
WA_VIGWMEKOND_STR-MWALTMV sy-vline 
WA_VIGWMEKOND_STR-WHRMKLBW sy-vline 
WA_VIGWMEKOND_STR-WHRISTMV sy-vline 
WA_VIGWMEKOND_STR-FLKGR sy-vline 
WA_VIGWMEKOND_STR-FEINH sy-vline      INTO ld_text SEPARATED BY SPACE.

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