ABAP Select data from SAP table LV13F into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP LV13F 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 LV13F. 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 LV13F 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_LV13F TYPE STANDARD TABLE OF LV13F,
      WA_LV13F TYPE LV13F,
      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: <LV13F> TYPE LV13F.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_LV13F.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM LV13F
  INTO TABLE IT_LV13F.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM LV13F
*  INTO TABLE @DATA(IT_LV13F2).
*--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_LV13F INDEX 1 INTO DATA(WA_LV13F2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_LV13F ASSIGNING <LV13F>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<LV13F>-VAKES1 = 1.
<LV13F>-VAKEF1 = 1.
<LV13F>-VAKET1 = 1.
<LV13F>-VAKES2 = 1.
<LV13F>-VAKEF2 = 1.

ENDLOOP.

LOOP AT IT_LV13F INTO WA_LV13F.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_LV13F-VAKET2, sy-vline,
  WA_LV13F-VAKES3, sy-vline,
  WA_LV13F-VAKEF3, sy-vline,
  WA_LV13F-VAKET3, sy-vline,
  WA_LV13F-FRAME, sy-vline,
  WA_LV13F-VAKEY, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_LV13F 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_LV13F 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_LV13F INTO WA_LV13F.


*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.
ENDFORM. 

*&---------------------------------------------------------------------*
*& Form process_as_string_field_values
*&---------------------------------------------------------------------*
FORM process_as_string_field_values CHANGING p_EKKO LIKE wa_EKKO.

TYPES: BEGIN OF T_LV13F_STR, 
VAKES1 TYPE STRING,
VAKEF1 TYPE STRING,
VAKET1 TYPE STRING,
VAKES2 TYPE STRING,
VAKEF2 TYPE STRING,
VAKET2 TYPE STRING,
VAKES3 TYPE STRING,
VAKEF3 TYPE STRING,
VAKET3 TYPE STRING,
FRAME TYPE STRING,
VAKEY TYPE STRING,
PUSHB1 TYPE STRING,
PUSHB2 TYPE STRING,
PUSHB3 TYPE STRING,
PUSHB4 TYPE STRING,
PUSHB5 TYPE STRING,
PUSHB6 TYPE STRING,
PUSHBU TYPE STRING,
PUSHBD TYPE STRING,
KVEWE TYPE STRING,
KONLI TYPE STRING,
KOBOG TYPE STRING,
VHEAD TYPE STRING,END OF T_EKKO_STR.
DATA: WA_LV13F_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_LV13F_STR-VAKES1 sy-vline 
WA_LV13F_STR-VAKEF1 sy-vline 
WA_LV13F_STR-VAKET1 sy-vline 
WA_LV13F_STR-VAKES2 sy-vline 
WA_LV13F_STR-VAKEF2 sy-vline 
WA_LV13F_STR-VAKET2 sy-vline 
WA_LV13F_STR-VAKES3 sy-vline 
WA_LV13F_STR-VAKEF3 sy-vline 
WA_LV13F_STR-VAKET3 sy-vline 
WA_LV13F_STR-FRAME sy-vline 
WA_LV13F_STR-VAKEY sy-vline 
WA_LV13F_STR-PUSHB1 sy-vline 
WA_LV13F_STR-PUSHB2 sy-vline 
WA_LV13F_STR-PUSHB3 sy-vline 
WA_LV13F_STR-PUSHB4 sy-vline 
WA_LV13F_STR-PUSHB5 sy-vline 
WA_LV13F_STR-PUSHB6 sy-vline 
WA_LV13F_STR-PUSHBU sy-vline 
WA_LV13F_STR-PUSHBD sy-vline 
WA_LV13F_STR-KVEWE sy-vline 
WA_LV13F_STR-KONLI sy-vline 
WA_LV13F_STR-KOBOG sy-vline 
WA_LV13F_STR-VHEAD sy-vline      INTO ld_text SEPARATED BY SPACE.

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