ABAP Select data from SAP table VNLLZ into internal table

Get Example source ABAP code based on a different SAP table
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Below is a number of ABAP code snippets to demonstrate how to select data from SAP VNLLZ 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 VNLLZ. 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 VNLLZ 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_VNLLZ TYPE STANDARD TABLE OF VNLLZ,
      WA_VNLLZ TYPE VNLLZ,
      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: <VNLLZ> TYPE VNLLZ.

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM VNLLZ
*  INTO TABLE @DATA(IT_VNLLZ2).
*--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_VNLLZ INDEX 1 INTO DATA(WA_VNLLZ2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<VNLLZ>-MANDT = 1.
<VNLLZ>-LNRLS1 = 1.
<VNLLZ>-LNRLS2 = 1.
<VNLLZ>-ZUOTP = 1.
<VNLLZ>-ZOTYP = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_VNLLZ-ERDAT, sy-vline,
  WA_VNLLZ-ERUSR, sy-vline,
  WA_VNLLZ-UPDAT, sy-vline,
  WA_VNLLZ-UPUSR, sy-vline,
  WA_VNLLZ-REIHNR, sy-vline,
  WA_VNLLZ-EINRI, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_VNLLZ 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_VNLLZ 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_VNLLZ INTO WA_VNLLZ.


*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 LNRLS1
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_VNLLZ-LNRLS1
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_VNLLZ-LNRLS1.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field LNRLS2
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_VNLLZ-LNRLS2
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_VNLLZ-LNRLS2.
WRITE:/ 'New Value:', ld_input.

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

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

*Conversion exit ALPHA, internal->external for field FALNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_VNLLZ-FALNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_VNLLZ-FALNR.
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_VNLLZ_STR, 
MANDT TYPE STRING,
LNRLS1 TYPE STRING,
LNRLS2 TYPE STRING,
ZUOTP TYPE STRING,
ZOTYP TYPE STRING,
ERDAT TYPE STRING,
ERUSR TYPE STRING,
UPDAT TYPE STRING,
UPUSR TYPE STRING,
REIHNR TYPE STRING,
EINRI TYPE STRING,
FALNR TYPE STRING,
KZ TYPE STRING,END OF T_EKKO_STR.
DATA: WA_VNLLZ_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_VNLLZ_STR-MANDT sy-vline 
WA_VNLLZ_STR-LNRLS1 sy-vline 
WA_VNLLZ_STR-LNRLS2 sy-vline 
WA_VNLLZ_STR-ZUOTP sy-vline 
WA_VNLLZ_STR-ZOTYP sy-vline 
WA_VNLLZ_STR-ERDAT sy-vline 
WA_VNLLZ_STR-ERUSR sy-vline 
WA_VNLLZ_STR-UPDAT sy-vline 
WA_VNLLZ_STR-UPUSR sy-vline 
WA_VNLLZ_STR-REIHNR sy-vline 
WA_VNLLZ_STR-EINRI sy-vline 
WA_VNLLZ_STR-FALNR sy-vline 
WA_VNLLZ_STR-KZ sy-vline      INTO ld_text SEPARATED BY SPACE.

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