ABAP Select data from SAP table LFINFOBJ into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM LFINFOBJ
*  INTO TABLE @DATA(IT_LFINFOBJ2).
*--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_LFINFOBJ INDEX 1 INTO DATA(WA_LFINFOBJ2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<LFINFOBJ>-MANDT = 1.
<LFINFOBJ>-LINFN = 1.
<LFINFOBJ>-PSPNR = 1.
<LFINFOBJ>-VSTEL = 1.
<LFINFOBJ>-VKORG = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_LFINFOBJ-VTWEG, sy-vline,
  WA_LFINFOBJ-SPART, sy-vline,
  WA_LFINFOBJ-KUNNR, sy-vline,
  WA_LFINFOBJ-ADRNR, sy-vline,
  WA_LFINFOBJ-LFDAT, sy-vline,
  WA_LFINFOBJ-WADAT, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_LFINFOBJ 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_LFINFOBJ 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_LFINFOBJ INTO WA_LFINFOBJ.


*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 KONPD, internal->external for field PSPNR
CALL FUNCTION 'CONVERSION_EXIT_KONPD_OUTPUT'
  EXPORTING
    input =                      WA_LFINFOBJ-PSPNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_LFINFOBJ-PSPNR.
WRITE:/ 'New Value:', ld_input.

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

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

*Conversion exit ABPSP, internal->external for field PS_PSP_PNR
CALL FUNCTION 'CONVERSION_EXIT_ABPSP_OUTPUT'
  EXPORTING
    input =                      WA_LFINFOBJ-PS_PSP_PNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_LFINFOBJ-PS_PSP_PNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field ADRN2
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_LFINFOBJ-ADRN2
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_LFINFOBJ-ADRN2.
WRITE:/ 'New Value:', ld_input.

*Conversion exit KONPD, internal->external for field PSPHI
CALL FUNCTION 'CONVERSION_EXIT_KONPD_OUTPUT'
  EXPORTING
    input =                      WA_LFINFOBJ-PSPHI
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_LFINFOBJ-PSPHI.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ABPSP, internal->external for field PSPNR2
CALL FUNCTION 'CONVERSION_EXIT_ABPSP_OUTPUT'
  EXPORTING
    input =                      WA_LFINFOBJ-PSPNR2
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_LFINFOBJ-PSPNR2.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ABPSN, internal->external for field POSID
CALL FUNCTION 'CONVERSION_EXIT_ABPSN_OUTPUT'
  EXPORTING
    input =                      WA_LFINFOBJ-POSID
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_LFINFOBJ-POSID.
WRITE:/ 'New Value:', ld_input.

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

*Conversion exit NUMCV, internal->external for field VORNR
CALL FUNCTION 'CONVERSION_EXIT_NUMCV_OUTPUT'
  EXPORTING
    input =                      WA_LFINFOBJ-VORNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_LFINFOBJ-VORNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit NUMCV, internal->external for field POSNR
CALL FUNCTION 'CONVERSION_EXIT_NUMCV_OUTPUT'
  EXPORTING
    input =                      WA_LFINFOBJ-POSNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_LFINFOBJ-POSNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit MATN1, internal->external for field MATNR
CALL FUNCTION 'CONVERSION_EXIT_MATN1_OUTPUT'
  EXPORTING
    input =                      WA_LFINFOBJ-MATNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_LFINFOBJ-MATNR.
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_LFINFOBJ_STR, 
MANDT TYPE STRING,
LINFN TYPE STRING,
PSPNR TYPE STRING,
VSTEL TYPE STRING,
VKORG TYPE STRING,
VTWEG TYPE STRING,
SPART TYPE STRING,
KUNNR TYPE STRING,
ADRNR TYPE STRING,
LFDAT TYPE STRING,
WADAT TYPE STRING,
LOEKZ TYPE STRING,
PS_PSP_PNR TYPE STRING,
LIFWA TYPE STRING,
ADRN2 TYPE STRING,
OBJNR_LINF TYPE STRING,
OBJNR TYPE STRING,
PSPHI TYPE STRING,
PSPNR2 TYPE STRING,
POSID TYPE STRING,
AUFPL TYPE STRING,
APLZL TYPE STRING,
AUFNR TYPE STRING,
NETZKONT TYPE STRING,
VORNR TYPE STRING,
RSNUM TYPE STRING,
RSPOS TYPE STRING,
POSNR TYPE STRING,
MATNR TYPE STRING,
TRTYP TYPE STRING,
LOEVM TYPE STRING,END OF T_EKKO_STR.
DATA: WA_LFINFOBJ_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_LFINFOBJ_STR-MANDT sy-vline 
WA_LFINFOBJ_STR-LINFN sy-vline 
WA_LFINFOBJ_STR-PSPNR sy-vline 
WA_LFINFOBJ_STR-VSTEL sy-vline 
WA_LFINFOBJ_STR-VKORG sy-vline 
WA_LFINFOBJ_STR-VTWEG sy-vline 
WA_LFINFOBJ_STR-SPART sy-vline 
WA_LFINFOBJ_STR-KUNNR sy-vline 
WA_LFINFOBJ_STR-ADRNR sy-vline 
WA_LFINFOBJ_STR-LFDAT sy-vline 
WA_LFINFOBJ_STR-WADAT sy-vline 
WA_LFINFOBJ_STR-LOEKZ sy-vline 
WA_LFINFOBJ_STR-PS_PSP_PNR sy-vline 
WA_LFINFOBJ_STR-LIFWA sy-vline 
WA_LFINFOBJ_STR-ADRN2 sy-vline 
WA_LFINFOBJ_STR-OBJNR_LINF sy-vline 
WA_LFINFOBJ_STR-OBJNR sy-vline 
WA_LFINFOBJ_STR-PSPHI sy-vline 
WA_LFINFOBJ_STR-PSPNR2 sy-vline 
WA_LFINFOBJ_STR-POSID sy-vline 
WA_LFINFOBJ_STR-AUFPL sy-vline 
WA_LFINFOBJ_STR-APLZL sy-vline 
WA_LFINFOBJ_STR-AUFNR sy-vline 
WA_LFINFOBJ_STR-NETZKONT sy-vline 
WA_LFINFOBJ_STR-VORNR sy-vline 
WA_LFINFOBJ_STR-RSNUM sy-vline 
WA_LFINFOBJ_STR-RSPOS sy-vline 
WA_LFINFOBJ_STR-POSNR sy-vline 
WA_LFINFOBJ_STR-MATNR sy-vline 
WA_LFINFOBJ_STR-TRTYP sy-vline 
WA_LFINFOBJ_STR-LOEVM sy-vline      INTO ld_text SEPARATED BY SPACE.

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