ABAP Select data from SAP table VILMLR into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM VILMLR
*  INTO TABLE @DATA(IT_VILMLR2).
*--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_VILMLR INDEX 1 INTO DATA(WA_VILMLR2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<VILMLR>-MANDT = 1.
<VILMLR>-INTRENO = 1.
<VILMLR>-LRDISTRICT = 1.
<VILMLR>-LRVOLUMENO = 1.
<VILMLR>-LRPAGENO = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_VILMLR-OBJNR, sy-vline,
  WA_VILMLR-CREATIONTYPE, sy-vline,
  WA_VILMLR-RERF, sy-vline,
  WA_VILMLR-DERF, sy-vline,
  WA_VILMLR-TERF, sy-vline,
  WA_VILMLR-REHER, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_VILMLR 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_VILMLR 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_VILMLR INTO WA_VILMLR.


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

*Conversion exit REDAT, internal->external for field VALIDTO
CALL FUNCTION 'CONVERSION_EXIT_REDAT_OUTPUT'
  EXPORTING
    input =                      WA_VILMLR-VALIDTO
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_VILMLR-VALIDTO.
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_VILMLR_STR, 
MANDT TYPE STRING,
INTRENO TYPE STRING,
LRDISTRICT TYPE STRING,
LRVOLUMENO TYPE STRING,
LRPAGENO TYPE STRING,
OBJNR TYPE STRING,
CREATIONTYPE TYPE STRING,
RERF TYPE STRING,
DERF TYPE STRING,
TERF TYPE STRING,
REHER TYPE STRING,
RBEAR TYPE STRING,
DBEAR TYPE STRING,
TBEAR TYPE STRING,
RBHER TYPE STRING,
RESPONSIBLE TYPE STRING,
USEREXCLUSIVE TYPE STRING,
AUTHGRP TYPE STRING,
LRTYPE TYPE STRING,
XLR TYPE STRING,
VALIDFROM TYPE STRING,
VALIDTO TYPE STRING,
LRNOOLD TYPE STRING,END OF T_EKKO_STR.
DATA: WA_VILMLR_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_VILMLR_STR-MANDT sy-vline 
WA_VILMLR_STR-INTRENO sy-vline 
WA_VILMLR_STR-LRDISTRICT sy-vline 
WA_VILMLR_STR-LRVOLUMENO sy-vline 
WA_VILMLR_STR-LRPAGENO sy-vline 
WA_VILMLR_STR-OBJNR sy-vline 
WA_VILMLR_STR-CREATIONTYPE sy-vline 
WA_VILMLR_STR-RERF sy-vline 
WA_VILMLR_STR-DERF sy-vline 
WA_VILMLR_STR-TERF sy-vline 
WA_VILMLR_STR-REHER sy-vline 
WA_VILMLR_STR-RBEAR sy-vline 
WA_VILMLR_STR-DBEAR sy-vline 
WA_VILMLR_STR-TBEAR sy-vline 
WA_VILMLR_STR-RBHER sy-vline 
WA_VILMLR_STR-RESPONSIBLE sy-vline 
WA_VILMLR_STR-USEREXCLUSIVE sy-vline 
WA_VILMLR_STR-AUTHGRP sy-vline 
WA_VILMLR_STR-LRTYPE sy-vline 
WA_VILMLR_STR-XLR sy-vline 
WA_VILMLR_STR-VALIDFROM sy-vline 
WA_VILMLR_STR-VALIDTO sy-vline 
WA_VILMLR_STR-LRNOOLD sy-vline      INTO ld_text SEPARATED BY SPACE.

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