ABAP Select data from SAP table WVLBRESTRIITEM into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM WVLBRESTRIITEM
*  INTO TABLE @DATA(IT_WVLBRESTRIITEM2).
*--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_WVLBRESTRIITEM INDEX 1 INTO DATA(WA_WVLBRESTRIITEM2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<WVLBRESTRIITEM>-MATNR = 1.
<WVLBRESTRIITEM>-MENGE = 1.
<WVLBRESTRIITEM>-OLDMG = 1.
<WVLBRESTRIITEM>-MEINS = 1.
<WVLBRESTRIITEM>-WERKS = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_WVLBRESTRIITEM-AKTNR, sy-vline,
  WA_WVLBRESTRIITEM-LGORT, sy-vline,
  WA_WVLBRESTRIITEM-WAERS, sy-vline,
  WA_WVLBRESTRIITEM-BPUMZ, sy-vline,
  WA_WVLBRESTRIITEM-BPUMN, sy-vline,
  WA_WVLBRESTRIITEM-UMREZ, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_WVLBRESTRIITEM 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_WVLBRESTRIITEM 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_WVLBRESTRIITEM INTO WA_WVLBRESTRIITEM.


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

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

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

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

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

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

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

*Conversion exit ALPHA, internal->external for field EBELN
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_WVLBRESTRIITEM-EBELN
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_WVLBRESTRIITEM-EBELN.
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_WVLBRESTRIITEM_STR, 
MATNR TYPE STRING,
MENGE TYPE STRING,
OLDMG TYPE STRING,
MEINS TYPE STRING,
WERKS TYPE STRING,
AKTNR TYPE STRING,
LGORT TYPE STRING,
WAERS TYPE STRING,
BPUMZ TYPE STRING,
BPUMN TYPE STRING,
UMREZ TYPE STRING,
UMREN TYPE STRING,
PREIS TYPE STRING,
LAENG TYPE STRING,
BREIT TYPE STRING,
HOEHE TYPE STRING,
MEABM TYPE STRING,
VOLUM TYPE STRING,
VOLEH TYPE STRING,
BRGEW TYPE STRING,
GEWEI TYPE STRING,
NTGEW TYPE STRING,
EKORG TYPE STRING,
INFNR TYPE STRING,
UEBPO TYPE STRING,
UPVOR TYPE STRING,
EBELN TYPE STRING,
EBELP TYPE STRING,
STAPO TYPE STRING,
ATTYP TYPE STRING,
DONT_CALC TYPE STRING,END OF T_EKKO_STR.
DATA: WA_WVLBRESTRIITEM_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_WVLBRESTRIITEM_STR-MATNR sy-vline 
WA_WVLBRESTRIITEM_STR-MENGE sy-vline 
WA_WVLBRESTRIITEM_STR-OLDMG sy-vline 
WA_WVLBRESTRIITEM_STR-MEINS sy-vline 
WA_WVLBRESTRIITEM_STR-WERKS sy-vline 
WA_WVLBRESTRIITEM_STR-AKTNR sy-vline 
WA_WVLBRESTRIITEM_STR-LGORT sy-vline 
WA_WVLBRESTRIITEM_STR-WAERS sy-vline 
WA_WVLBRESTRIITEM_STR-BPUMZ sy-vline 
WA_WVLBRESTRIITEM_STR-BPUMN sy-vline 
WA_WVLBRESTRIITEM_STR-UMREZ sy-vline 
WA_WVLBRESTRIITEM_STR-UMREN sy-vline 
WA_WVLBRESTRIITEM_STR-PREIS sy-vline 
WA_WVLBRESTRIITEM_STR-LAENG sy-vline 
WA_WVLBRESTRIITEM_STR-BREIT sy-vline 
WA_WVLBRESTRIITEM_STR-HOEHE sy-vline 
WA_WVLBRESTRIITEM_STR-MEABM sy-vline 
WA_WVLBRESTRIITEM_STR-VOLUM sy-vline 
WA_WVLBRESTRIITEM_STR-VOLEH sy-vline 
WA_WVLBRESTRIITEM_STR-BRGEW sy-vline 
WA_WVLBRESTRIITEM_STR-GEWEI sy-vline 
WA_WVLBRESTRIITEM_STR-NTGEW sy-vline 
WA_WVLBRESTRIITEM_STR-EKORG sy-vline 
WA_WVLBRESTRIITEM_STR-INFNR sy-vline 
WA_WVLBRESTRIITEM_STR-UEBPO sy-vline 
WA_WVLBRESTRIITEM_STR-UPVOR sy-vline 
WA_WVLBRESTRIITEM_STR-EBELN sy-vline 
WA_WVLBRESTRIITEM_STR-EBELP sy-vline 
WA_WVLBRESTRIITEM_STR-STAPO sy-vline 
WA_WVLBRESTRIITEM_STR-ATTYP sy-vline 
WA_WVLBRESTRIITEM_STR-DONT_CALC sy-vline      INTO ld_text SEPARATED BY SPACE.

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