ABAP Select data from SAP table LFVI8 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 LFVI8 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 LFVI8. 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 LFVI8 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_LFVI8 TYPE STANDARD TABLE OF LFVI8,
      WA_LFVI8 TYPE LFVI8,
      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: <LFVI8> TYPE LFVI8.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_LFVI8.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM LFVI8
  INTO TABLE IT_LFVI8.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM LFVI8
*  INTO TABLE @DATA(IT_LFVI82).
*--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_LFVI8 INDEX 1 INTO DATA(WA_LFVI82).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_LFVI8 ASSIGNING <LFVI8>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<LFVI8>-MANDT = 1.
<LFVI8>-BUKRS = 1.
<LFVI8>-WENR = 1.
<LFVI8>-GRNR = 1.
<LFVI8>-GENR = 1.

ENDLOOP.

LOOP AT IT_LFVI8 INTO WA_LFVI8.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_LFVI8-MENR, sy-vline,
  WA_LFVI8-NKSL, sy-vline,
  WA_LFVI8-EMPSL, sy-vline,
  WA_LFVI8-MIVE, sy-vline,
  WA_LFVI8-IMKEY, sy-vline,
  WA_LFVI8-DABRBEZ, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_LFVI8 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_LFVI8 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_LFVI8 INTO WA_LFVI8.


*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 SWENR, internal->external for field WENR
CALL FUNCTION 'CONVERSION_EXIT_SWENR_OUTPUT'
  EXPORTING
    input =                      WA_LFVI8-WENR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_LFVI8-WENR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit SGRNR, internal->external for field GRNR
CALL FUNCTION 'CONVERSION_EXIT_SGRNR_OUTPUT'
  EXPORTING
    input =                      WA_LFVI8-GRNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_LFVI8-GRNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit SGENR, internal->external for field GENR
CALL FUNCTION 'CONVERSION_EXIT_SGENR_OUTPUT'
  EXPORTING
    input =                      WA_LFVI8-GENR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_LFVI8-GENR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit SMENR, internal->external for field MENR
CALL FUNCTION 'CONVERSION_EXIT_SMENR_OUTPUT'
  EXPORTING
    input =                      WA_LFVI8-MENR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_LFVI8-MENR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field NKSL
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_LFVI8-NKSL
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_LFVI8-NKSL.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field EMPSL
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_LFVI8-EMPSL
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_LFVI8-EMPSL.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field MIVE
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_LFVI8-MIVE
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_LFVI8-MIVE.
WRITE:/ 'New Value:', ld_input.

*Conversion exit IMKEY, internal->external for field IMKEY
CALL FUNCTION 'CONVERSION_EXIT_IMKEY_OUTPUT'
  EXPORTING
    input =                      WA_LFVI8-IMKEY
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_LFVI8-IMKEY.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field ANLN1
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_LFVI8-ANLN1
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_LFVI8-ANLN1.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field ANLN2
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_LFVI8-ANLN2
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_LFVI8-ANLN2.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field SBERI
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_LFVI8-SBERI
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_LFVI8-SBERI.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field RBELG
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_LFVI8-RBELG
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_LFVI8-RBELG.
WRITE:/ 'New Value:', ld_input.

*Conversion exit GJAHR, internal->external for field RBGJ
CALL FUNCTION 'CONVERSION_EXIT_GJAHR_OUTPUT'
  EXPORTING
    input =                      WA_LFVI8-RBGJ
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_LFVI8-RBGJ.
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_LFVI8_STR, 
MANDT TYPE STRING,
BUKRS TYPE STRING,
WENR TYPE STRING,
GRNR TYPE STRING,
GENR TYPE STRING,
MENR TYPE STRING,
NKSL TYPE STRING,
EMPSL TYPE STRING,
MIVE TYPE STRING,
IMKEY TYPE STRING,
DABRBEZ TYPE STRING,
POPTSATZ TYPE STRING,
WAERS TYPE STRING,
ISOCD TYPE STRING,
WMWST TYPE STRING,
MWSKZ TYPE STRING,
NABFW TYPE STRING,
ABZFW TYPE STRING,
ANLN1 TYPE STRING,
ANLN2 TYPE STRING,
SBERI TYPE STRING,
SNKS TYPE STRING,
RBELG TYPE STRING,
RBBUZ TYPE STRING,
RBGJ TYPE STRING,
INTRENO TYPE STRING,
TXJCD TYPE STRING,END OF T_EKKO_STR.
DATA: WA_LFVI8_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_LFVI8_STR-MANDT sy-vline 
WA_LFVI8_STR-BUKRS sy-vline 
WA_LFVI8_STR-WENR sy-vline 
WA_LFVI8_STR-GRNR sy-vline 
WA_LFVI8_STR-GENR sy-vline 
WA_LFVI8_STR-MENR sy-vline 
WA_LFVI8_STR-NKSL sy-vline 
WA_LFVI8_STR-EMPSL sy-vline 
WA_LFVI8_STR-MIVE sy-vline 
WA_LFVI8_STR-IMKEY sy-vline 
WA_LFVI8_STR-DABRBEZ sy-vline 
WA_LFVI8_STR-POPTSATZ sy-vline 
WA_LFVI8_STR-WAERS sy-vline 
WA_LFVI8_STR-ISOCD sy-vline 
WA_LFVI8_STR-WMWST sy-vline 
WA_LFVI8_STR-MWSKZ sy-vline 
WA_LFVI8_STR-NABFW sy-vline 
WA_LFVI8_STR-ABZFW sy-vline 
WA_LFVI8_STR-ANLN1 sy-vline 
WA_LFVI8_STR-ANLN2 sy-vline 
WA_LFVI8_STR-SBERI sy-vline 
WA_LFVI8_STR-SNKS sy-vline 
WA_LFVI8_STR-RBELG sy-vline 
WA_LFVI8_STR-RBBUZ sy-vline 
WA_LFVI8_STR-RBGJ sy-vline 
WA_LFVI8_STR-INTRENO sy-vline 
WA_LFVI8_STR-TXJCD sy-vline      INTO ld_text SEPARATED BY SPACE.

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