ABAP Select data from SAP table SLIFO_DIF into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM SLIFO_DIF
*  INTO TABLE @DATA(IT_SLIFO_DIF2).
*--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_SLIFO_DIF INDEX 1 INTO DATA(WA_SLIFO_DIF2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<SLIFO_DIF>-XLIFO = 1.
<SLIFO_DIF>-BUZID = 1.
<SLIFO_DIF>-KOART = 1.
<SLIFO_DIF>-KTOSL = 1.
<SLIFO_DIF>-BUSTW = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_SLIFO_DIF-BUKRS, sy-vline,
  WA_SLIFO_DIF-BWKEY, sy-vline,
  WA_SLIFO_DIF-BUDAT, sy-vline,
  WA_SLIFO_DIF-GJAHR, sy-vline,
  WA_SLIFO_DIF-MONAT, sy-vline,
  WA_SLIFO_DIF-MATNR, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_SLIFO_DIF 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_SLIFO_DIF 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_SLIFO_DIF INTO WA_SLIFO_DIF.


*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 GJAHR, internal->external for field GJAHR
CALL FUNCTION 'CONVERSION_EXIT_GJAHR_OUTPUT'
  EXPORTING
    input =                      WA_SLIFO_DIF-GJAHR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_SLIFO_DIF-GJAHR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit MATN1, internal->external for field MATNR
CALL FUNCTION 'CONVERSION_EXIT_MATN1_OUTPUT'
  EXPORTING
    input =                      WA_SLIFO_DIF-MATNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_SLIFO_DIF-MATNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit MATN1, internal->external for field MATBF
CALL FUNCTION 'CONVERSION_EXIT_MATN1_OUTPUT'
  EXPORTING
    input =                      WA_SLIFO_DIF-MATBF
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_SLIFO_DIF-MATBF.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field MEINS
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_SLIFO_DIF-MEINS
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_SLIFO_DIF-MEINS.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field EBELN
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_SLIFO_DIF-EBELN
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_SLIFO_DIF-EBELN.
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_SLIFO_DIF_STR, 
XLIFO TYPE STRING,
BUZID TYPE STRING,
KOART TYPE STRING,
KTOSL TYPE STRING,
BUSTW TYPE STRING,
BUKRS TYPE STRING,
BWKEY TYPE STRING,
BUDAT TYPE STRING,
GJAHR TYPE STRING,
MONAT TYPE STRING,
MATNR TYPE STRING,
MATBF TYPE STRING,
MEINS TYPE STRING,
WAART TYPE STRING,
BWTAR TYPE STRING,
DMBTR TYPE STRING,
SHKZG TYPE STRING,
CURTP TYPE STRING,
KZBEW TYPE STRING,
EBELN TYPE STRING,
EBELP TYPE STRING,
WEBRE TYPE STRING,
KNTTP TYPE STRING,
PSTYP TYPE STRING,END OF T_EKKO_STR.
DATA: WA_SLIFO_DIF_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_SLIFO_DIF_STR-XLIFO sy-vline 
WA_SLIFO_DIF_STR-BUZID sy-vline 
WA_SLIFO_DIF_STR-KOART sy-vline 
WA_SLIFO_DIF_STR-KTOSL sy-vline 
WA_SLIFO_DIF_STR-BUSTW sy-vline 
WA_SLIFO_DIF_STR-BUKRS sy-vline 
WA_SLIFO_DIF_STR-BWKEY sy-vline 
WA_SLIFO_DIF_STR-BUDAT sy-vline 
WA_SLIFO_DIF_STR-GJAHR sy-vline 
WA_SLIFO_DIF_STR-MONAT sy-vline 
WA_SLIFO_DIF_STR-MATNR sy-vline 
WA_SLIFO_DIF_STR-MATBF sy-vline 
WA_SLIFO_DIF_STR-MEINS sy-vline 
WA_SLIFO_DIF_STR-WAART sy-vline 
WA_SLIFO_DIF_STR-BWTAR sy-vline 
WA_SLIFO_DIF_STR-DMBTR sy-vline 
WA_SLIFO_DIF_STR-SHKZG sy-vline 
WA_SLIFO_DIF_STR-CURTP sy-vline 
WA_SLIFO_DIF_STR-KZBEW sy-vline 
WA_SLIFO_DIF_STR-EBELN sy-vline 
WA_SLIFO_DIF_STR-EBELP sy-vline 
WA_SLIFO_DIF_STR-WEBRE sy-vline 
WA_SLIFO_DIF_STR-KNTTP sy-vline 
WA_SLIFO_DIF_STR-PSTYP sy-vline      INTO ld_text SEPARATED BY SPACE.

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