ABAP Select data from SAP table LFVI7 into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP LFVI7 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 LFVI7. 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 LFVI7 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_LFVI7 TYPE STANDARD TABLE OF LFVI7,
      WA_LFVI7 TYPE LFVI7,
      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: <LFVI7> TYPE LFVI7.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_LFVI7.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM LFVI7
  INTO TABLE IT_LFVI7.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM LFVI7
*  INTO TABLE @DATA(IT_LFVI72).
*--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_LFVI7 INDEX 1 INTO DATA(WA_LFVI72).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_LFVI7 ASSIGNING <LFVI7>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<LFVI7>-CHKBX = 1.
<LFVI7>-ICON4 = 1.
<LFVI7>-BUZEI = 1.
<LFVI7>-BUKRS = 1.
<LFVI7>-BSCHL = 1.

ENDLOOP.

LOOP AT IT_LFVI7 INTO WA_LFVI7.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_LFVI7-SHKZG, sy-vline,
  WA_LFVI7-UMSKZ, sy-vline,
  WA_LFVI7-WRBTR, sy-vline,
  WA_LFVI7-WAERS, sy-vline,
  WA_LFVI7-DMBTR, sy-vline,
  WA_LFVI7-HWAER, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_LFVI7 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_LFVI7 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_LFVI7 INTO WA_LFVI7.


*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 HKONT
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_LFVI7-HKONT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_LFVI7-HKONT.
WRITE:/ 'New Value:', ld_input.

*Conversion exit IMKEY, internal->external for field IMKEY
CALL FUNCTION 'CONVERSION_EXIT_IMKEY_OUTPUT'
  EXPORTING
    input =                      WA_LFVI7-IMKEY
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_LFVI7-IMKEY.
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_LFVI7_STR, 
CHKBX TYPE STRING,
ICON4 TYPE STRING,
BUZEI TYPE STRING,
BUKRS TYPE STRING,
BSCHL TYPE STRING,
SHKZG TYPE STRING,
UMSKZ TYPE STRING,
WRBTR TYPE STRING,
WAERS TYPE STRING,
DMBTR TYPE STRING,
HWAER TYPE STRING,
MWSKZ TYPE STRING,
SGTXT TYPE STRING,
HKONT TYPE STRING,
TXT50 TYPE STRING,
GSBER TYPE STRING,
BLART TYPE STRING,
DABRZ TYPE STRING,
POPTS TYPE STRING,
MWSTS TYPE STRING,
WMWST TYPE STRING,
IMKEY TYPE STRING,
OJTXT TYPE STRING,END OF T_EKKO_STR.
DATA: WA_LFVI7_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_LFVI7_STR-CHKBX sy-vline 
WA_LFVI7_STR-ICON4 sy-vline 
WA_LFVI7_STR-BUZEI sy-vline 
WA_LFVI7_STR-BUKRS sy-vline 
WA_LFVI7_STR-BSCHL sy-vline 
WA_LFVI7_STR-SHKZG sy-vline 
WA_LFVI7_STR-UMSKZ sy-vline 
WA_LFVI7_STR-WRBTR sy-vline 
WA_LFVI7_STR-WAERS sy-vline 
WA_LFVI7_STR-DMBTR sy-vline 
WA_LFVI7_STR-HWAER sy-vline 
WA_LFVI7_STR-MWSKZ sy-vline 
WA_LFVI7_STR-SGTXT sy-vline 
WA_LFVI7_STR-HKONT sy-vline 
WA_LFVI7_STR-TXT50 sy-vline 
WA_LFVI7_STR-GSBER sy-vline 
WA_LFVI7_STR-BLART sy-vline 
WA_LFVI7_STR-DABRZ sy-vline 
WA_LFVI7_STR-POPTS sy-vline 
WA_LFVI7_STR-MWSTS sy-vline 
WA_LFVI7_STR-WMWST sy-vline 
WA_LFVI7_STR-IMKEY sy-vline 
WA_LFVI7_STR-OJTXT sy-vline      INTO ld_text SEPARATED BY SPACE.

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