ABAP Select data from SAP table VILMRGDTSRV into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM VILMRGDTSRV
*  INTO TABLE @DATA(IT_VILMRGDTSRV2).
*--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_VILMRGDTSRV INDEX 1 INTO DATA(WA_VILMRGDTSRV2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<VILMRGDTSRV>-MANDT = 1.
<VILMRGDTSRV>-INTRENO = 1.
<VILMRGDTSRV>-LRREGNO = 1.
<VILMRGDTSRV>-LRREGSUBNO = 1.
<VILMRGDTSRV>-LRREGSUBNOSRV = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_VILMRGDTSRV-PLEXTIDENTKEY, sy-vline,
  WA_VILMRGDTSRV-PLOBJNR, sy-vline,
  WA_VILMRGDTSRV-LRDISTRICT, sy-vline,
  WA_VILMRGDTSRV-LRVOLUMENO, sy-vline,
  WA_VILMRGDTSRV-LRPAGENO, sy-vline,
  WA_VILMRGDTSRV-SECTYPE, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_VILMRGDTSRV 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_VILMRGDTSRV 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_VILMRGDTSRV INTO WA_VILMRGDTSRV.


*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 LRREG, internal->external for field LRREGNO
CALL FUNCTION 'CONVERSION_EXIT_LRREG_OUTPUT'
  EXPORTING
    input =                      WA_VILMRGDTSRV-LRREGNO
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_VILMRGDTSRV-LRREGNO.
WRITE:/ 'New Value:', ld_input.

*Conversion exit LRPGN, internal->external for field LRPAGENO
CALL FUNCTION 'CONVERSION_EXIT_LRPGN_OUTPUT'
  EXPORTING
    input =                      WA_VILMRGDTSRV-LRPAGENO
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_VILMRGDTSRV-LRPAGENO.
WRITE:/ 'New Value:', ld_input.

*Conversion exit LRSEC, internal->external for field SECNO
CALL FUNCTION 'CONVERSION_EXIT_LRSEC_OUTPUT'
  EXPORTING
    input =                      WA_VILMRGDTSRV-SECNO
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_VILMRGDTSRV-SECNO.
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_VILMRGDTSRV_STR, 
MANDT TYPE STRING,
INTRENO TYPE STRING,
LRREGNO TYPE STRING,
LRREGSUBNO TYPE STRING,
LRREGSUBNOSRV TYPE STRING,
PLEXTIDENTKEY TYPE STRING,
PLOBJNR TYPE STRING,
LRDISTRICT TYPE STRING,
LRVOLUMENO TYPE STRING,
LRPAGENO TYPE STRING,
SECTYPE TYPE STRING,
SECNO TYPE STRING,END OF T_EKKO_STR.
DATA: WA_VILMRGDTSRV_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_VILMRGDTSRV_STR-MANDT sy-vline 
WA_VILMRGDTSRV_STR-INTRENO sy-vline 
WA_VILMRGDTSRV_STR-LRREGNO sy-vline 
WA_VILMRGDTSRV_STR-LRREGSUBNO sy-vline 
WA_VILMRGDTSRV_STR-LRREGSUBNOSRV sy-vline 
WA_VILMRGDTSRV_STR-PLEXTIDENTKEY sy-vline 
WA_VILMRGDTSRV_STR-PLOBJNR sy-vline 
WA_VILMRGDTSRV_STR-LRDISTRICT sy-vline 
WA_VILMRGDTSRV_STR-LRVOLUMENO sy-vline 
WA_VILMRGDTSRV_STR-LRPAGENO sy-vline 
WA_VILMRGDTSRV_STR-SECTYPE sy-vline 
WA_VILMRGDTSRV_STR-SECNO sy-vline      INTO ld_text SEPARATED BY SPACE.

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