ABAP Select data from SAP table WVMI_ALV_PAROV into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM WVMI_ALV_PAROV
*  INTO TABLE @DATA(IT_WVMI_ALV_PAROV2).
*--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_WVMI_ALV_PAROV INDEX 1 INTO DATA(WA_WVMI_ALV_PAROV2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<WVMI_ALV_PAROV>-KUNNR = 1.
<WVMI_ALV_PAROV>-MATKL = 1.
<WVMI_ALV_PAROV>-MATNR = 1.
<WVMI_ALV_PAROV>-DISMM = 1.
<WVMI_ALV_PAROV>-MEINS = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_WVMI_ALV_PAROV-STOCK, sy-vline,
  WA_WVMI_ALV_PAROV-ONORD, sy-vline,
  WA_WVMI_ALV_PAROV-SOBST, sy-vline,
  WA_WVMI_ALV_PAROV-MINBE, sy-vline,
  WA_WVMI_ALV_PAROV-EISBE, sy-vline,
  WA_WVMI_ALV_PAROV-TRCOV, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_WVMI_ALV_PAROV 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_WVMI_ALV_PAROV 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_WVMI_ALV_PAROV INTO WA_WVMI_ALV_PAROV.


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

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

*Conversion exit CUNIT, internal->external for field MEINS
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_WVMI_ALV_PAROV-MEINS
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_WVMI_ALV_PAROV-MEINS.
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_WVMI_ALV_PAROV_STR, 
KUNNR TYPE STRING,
MATKL TYPE STRING,
MATNR TYPE STRING,
DISMM TYPE STRING,
MEINS TYPE STRING,
STOCK TYPE STRING,
ONORD TYPE STRING,
SOBST TYPE STRING,
MINBE TYPE STRING,
EISBE TYPE STRING,
TRCOV TYPE STRING,
PRWUG TYPE STRING,
PRWOG TYPE STRING,
CHNGECH TYPE STRING,
NIMGTCH TYPE STRING,
NGRCTCH TYPE STRING,
RPLID TYPE STRING,
RPLRQ TYPE STRING,
RPLSTCH TYPE STRING,
WERKS TYPE STRING,
IMFLG TYPE STRING,END OF T_EKKO_STR.
DATA: WA_WVMI_ALV_PAROV_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_WVMI_ALV_PAROV_STR-KUNNR sy-vline 
WA_WVMI_ALV_PAROV_STR-MATKL sy-vline 
WA_WVMI_ALV_PAROV_STR-MATNR sy-vline 
WA_WVMI_ALV_PAROV_STR-DISMM sy-vline 
WA_WVMI_ALV_PAROV_STR-MEINS sy-vline 
WA_WVMI_ALV_PAROV_STR-STOCK sy-vline 
WA_WVMI_ALV_PAROV_STR-ONORD sy-vline 
WA_WVMI_ALV_PAROV_STR-SOBST sy-vline 
WA_WVMI_ALV_PAROV_STR-MINBE sy-vline 
WA_WVMI_ALV_PAROV_STR-EISBE sy-vline 
WA_WVMI_ALV_PAROV_STR-TRCOV sy-vline 
WA_WVMI_ALV_PAROV_STR-PRWUG sy-vline 
WA_WVMI_ALV_PAROV_STR-PRWOG sy-vline 
WA_WVMI_ALV_PAROV_STR-CHNGECH sy-vline 
WA_WVMI_ALV_PAROV_STR-NIMGTCH sy-vline 
WA_WVMI_ALV_PAROV_STR-NGRCTCH sy-vline 
WA_WVMI_ALV_PAROV_STR-RPLID sy-vline 
WA_WVMI_ALV_PAROV_STR-RPLRQ sy-vline 
WA_WVMI_ALV_PAROV_STR-RPLSTCH sy-vline 
WA_WVMI_ALV_PAROV_STR-WERKS sy-vline 
WA_WVMI_ALV_PAROV_STR-IMFLG sy-vline      INTO ld_text SEPARATED BY SPACE.

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