ABAP Select data from SAP table VHU_REF_MAT_USED into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM VHU_REF_MAT_USED
*  INTO TABLE @DATA(IT_VHU_REF_MAT_USED2).
*--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_VHU_REF_MAT_USED INDEX 1 INTO DATA(WA_VHU_REF_MAT_USED2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<VHU_REF_MAT_USED>-MANDT = 1.
<VHU_REF_MAT_USED>-POBJID = 1.
<VHU_REF_MAT_USED>-PARTID = 1.
<VHU_REF_MAT_USED>-PACKTYP = 1.
<VHU_REF_MAT_USED>-PAITEMTYPE = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_VHU_REF_MAT_USED-MATNR, sy-vline,
  WA_VHU_REF_MAT_USED-SUBPOBJID, sy-vline,
  WA_VHU_REF_MAT_USED-CRNAM, sy-vline,
  WA_VHU_REF_MAT_USED-CRDAT, sy-vline,
  WA_VHU_REF_MAT_USED-CONTENT, sy-vline,
  WA_VHU_REF_MAT_USED-INDDEL, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_VHU_REF_MAT_USED 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_VHU_REF_MAT_USED 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_VHU_REF_MAT_USED INTO WA_VHU_REF_MAT_USED.


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

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

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

*Conversion exit ALPHA, internal->external for field SUBPOBJID
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_VHU_REF_MAT_USED-SUBPOBJID
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_VHU_REF_MAT_USED-SUBPOBJID.
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_VHU_REF_MAT_USED_STR, 
MANDT TYPE STRING,
POBJID TYPE STRING,
PARTID TYPE STRING,
PACKTYP TYPE STRING,
PAITEMTYPE TYPE STRING,
MATNR TYPE STRING,
SUBPOBJID TYPE STRING,
CRNAM TYPE STRING,
CRDAT TYPE STRING,
CONTENT TYPE STRING,
INDDEL TYPE STRING,END OF T_EKKO_STR.
DATA: WA_VHU_REF_MAT_USED_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_VHU_REF_MAT_USED_STR-MANDT sy-vline 
WA_VHU_REF_MAT_USED_STR-POBJID sy-vline 
WA_VHU_REF_MAT_USED_STR-PARTID sy-vline 
WA_VHU_REF_MAT_USED_STR-PACKTYP sy-vline 
WA_VHU_REF_MAT_USED_STR-PAITEMTYPE sy-vline 
WA_VHU_REF_MAT_USED_STR-MATNR sy-vline 
WA_VHU_REF_MAT_USED_STR-SUBPOBJID sy-vline 
WA_VHU_REF_MAT_USED_STR-CRNAM sy-vline 
WA_VHU_REF_MAT_USED_STR-CRDAT sy-vline 
WA_VHU_REF_MAT_USED_STR-CONTENT sy-vline 
WA_VHU_REF_MAT_USED_STR-INDDEL sy-vline      INTO ld_text SEPARATED BY SPACE.

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