ABAP Select data from SAP table V_MM_CHVW into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM V_MM_CHVW
*  INTO TABLE @DATA(IT_V_MM_CHVW2).
*--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_V_MM_CHVW INDEX 1 INTO DATA(WA_V_MM_CHVW2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<V_MM_CHVW>-MANDT = 1.
<V_MM_CHVW>-XZUGA = 1.
<V_MM_CHVW>-WERKS = 1.
<V_MM_CHVW>-MATNR = 1.
<V_MM_CHVW>-CHARG = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_V_MM_CHVW-AUFNR, sy-vline,
  WA_V_MM_CHVW-AUFPS, sy-vline,
  WA_V_MM_CHVW-EBELN, sy-vline,
  WA_V_MM_CHVW-EBELP, sy-vline,
  WA_V_MM_CHVW-BUDAT, sy-vline,
  WA_V_MM_CHVW-SHKZG, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_V_MM_CHVW 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_V_MM_CHVW 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_V_MM_CHVW INTO WA_V_MM_CHVW.


*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_V_MM_CHVW-MATNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_V_MM_CHVW-MATNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field AUFNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_V_MM_CHVW-AUFNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_V_MM_CHVW-AUFNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field EBELN
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_V_MM_CHVW-EBELN
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_V_MM_CHVW-EBELN.
WRITE:/ 'New Value:', ld_input.

*Conversion exit MATN1, internal->external for field UMMAT
CALL FUNCTION 'CONVERSION_EXIT_MATN1_OUTPUT'
  EXPORTING
    input =                      WA_V_MM_CHVW-UMMAT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_V_MM_CHVW-UMMAT.
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_V_MM_CHVW_STR, 
MANDT TYPE STRING,
XZUGA TYPE STRING,
WERKS TYPE STRING,
MATNR TYPE STRING,
CHARG TYPE STRING,
AUFNR TYPE STRING,
AUFPS TYPE STRING,
EBELN TYPE STRING,
EBELP TYPE STRING,
BUDAT TYPE STRING,
SHKZG TYPE STRING,
BWART TYPE STRING,
KZBEW TYPE STRING,
SOBKZ TYPE STRING,
UMWRK TYPE STRING,
UMMAT TYPE STRING,
UMCHA TYPE STRING,END OF T_EKKO_STR.
DATA: WA_V_MM_CHVW_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_V_MM_CHVW_STR-MANDT sy-vline 
WA_V_MM_CHVW_STR-XZUGA sy-vline 
WA_V_MM_CHVW_STR-WERKS sy-vline 
WA_V_MM_CHVW_STR-MATNR sy-vline 
WA_V_MM_CHVW_STR-CHARG sy-vline 
WA_V_MM_CHVW_STR-AUFNR sy-vline 
WA_V_MM_CHVW_STR-AUFPS sy-vline 
WA_V_MM_CHVW_STR-EBELN sy-vline 
WA_V_MM_CHVW_STR-EBELP sy-vline 
WA_V_MM_CHVW_STR-BUDAT sy-vline 
WA_V_MM_CHVW_STR-SHKZG sy-vline 
WA_V_MM_CHVW_STR-BWART sy-vline 
WA_V_MM_CHVW_STR-KZBEW sy-vline 
WA_V_MM_CHVW_STR-SOBKZ sy-vline 
WA_V_MM_CHVW_STR-UMWRK sy-vline 
WA_V_MM_CHVW_STR-UMMAT sy-vline 
WA_V_MM_CHVW_STR-UMCHA sy-vline      INTO ld_text SEPARATED BY SPACE.

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