ABAP Select data from SAP table L2SKDLITEM into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP L2SKDLITEM 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 L2SKDLITEM. 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 L2SKDLITEM 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_L2SKDLITEM TYPE STANDARD TABLE OF L2SKDLITEM,
      WA_L2SKDLITEM TYPE L2SKDLITEM,
      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: <L2SKDLITEM> TYPE L2SKDLITEM.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_L2SKDLITEM.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM L2SKDLITEM
  INTO TABLE IT_L2SKDLITEM.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM L2SKDLITEM
*  INTO TABLE @DATA(IT_L2SKDLITEM2).
*--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_L2SKDLITEM INDEX 1 INTO DATA(WA_L2SKDLITEM2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_L2SKDLITEM ASSIGNING <L2SKDLITEM>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<L2SKDLITEM>-LGNUM = 1.
<L2SKDLITEM>-REFNR = 1.
<L2SKDLITEM>-VBELN = 1.
<L2SKDLITEM>-POSNR = 1.
<L2SKDLITEM>-L2SKR = 1.

ENDLOOP.

LOOP AT IT_L2SKDLITEM INTO WA_L2SKDLITEM.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_L2SKDLITEM-L2SKR_OLD, sy-vline,
  WA_L2SKDLITEM-MATNR, sy-vline,
  WA_L2SKDLITEM-WERKS, sy-vline,
  WA_L2SKDLITEM-LGORT, sy-vline,
  WA_L2SKDLITEM-CHARG, sy-vline,
  WA_L2SKDLITEM-BESTQ, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_L2SKDLITEM 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_L2SKDLITEM 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_L2SKDLITEM INTO WA_L2SKDLITEM.


*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 REFNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_L2SKDLITEM-REFNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_L2SKDLITEM-REFNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field VBELN
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_L2SKDLITEM-VBELN
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_L2SKDLITEM-VBELN.
WRITE:/ 'New Value:', ld_input.

*Conversion exit MATN1, internal->external for field MATNR
CALL FUNCTION 'CONVERSION_EXIT_MATN1_OUTPUT'
  EXPORTING
    input =                      WA_L2SKDLITEM-MATNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_L2SKDLITEM-MATNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field MEINS
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_L2SKDLITEM-MEINS
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_L2SKDLITEM-MEINS.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field VRKME
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_L2SKDLITEM-VRKME
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_L2SKDLITEM-VRKME.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field GEWEI
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_L2SKDLITEM-GEWEI
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_L2SKDLITEM-GEWEI.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field VOLEH
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_L2SKDLITEM-VOLEH
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_L2SKDLITEM-VOLEH.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field KUNNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_L2SKDLITEM-KUNNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_L2SKDLITEM-KUNNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field VBELV
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_L2SKDLITEM-VBELV
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_L2SKDLITEM-VBELV.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ABPSP, internal->external for field PS_PSP_PNR
CALL FUNCTION 'CONVERSION_EXIT_ABPSP_OUTPUT'
  EXPORTING
    input =                      WA_L2SKDLITEM-PS_PSP_PNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_L2SKDLITEM-PS_PSP_PNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field WIRME
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_L2SKDLITEM-WIRME
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_L2SKDLITEM-WIRME.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field SONUM
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_L2SKDLITEM-SONUM
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_L2SKDLITEM-SONUM.
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_L2SKDLITEM_STR, 
LGNUM TYPE STRING,
REFNR TYPE STRING,
VBELN TYPE STRING,
POSNR TYPE STRING,
L2SKR TYPE STRING,
L2SKR_OLD TYPE STRING,
MATNR TYPE STRING,
WERKS TYPE STRING,
LGORT TYPE STRING,
CHARG TYPE STRING,
BESTQ TYPE STRING,
SOBKZ TYPE STRING,
BWTAR TYPE STRING,
LFIMG TYPE STRING,
LGMNG TYPE STRING,
KOMNG TYPE STRING,
KOMNA TYPE STRING,
MEINS TYPE STRING,
VRKME TYPE STRING,
UMVKZ TYPE STRING,
UMVKN TYPE STRING,
BRGEW TYPE STRING,
NTGEW TYPE STRING,
GEWEI TYPE STRING,
VOLUM TYPE STRING,
VOLEH TYPE STRING,
EMPST TYPE STRING,
KOMKZ TYPE STRING,
VSTEL TYPE STRING,
ROUTE TYPE STRING,
LPRIO TYPE STRING,
KODAT TYPE STRING,
LDDAT TYPE STRING,
KUNNR TYPE STRING,
LGTOR TYPE STRING,
LGBZO TYPE STRING,
SELKZ TYPE STRING,
VBELV TYPE STRING,
POSNV TYPE STRING,
PS_PSP_PNR TYPE STRING,
WIRME TYPE STRING,
SONUM TYPE STRING,
LSONR TYPE STRING,
SGT_RCAT TYPE STRING,
SGT_SCAT TYPE STRING,END OF T_EKKO_STR.
DATA: WA_L2SKDLITEM_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_L2SKDLITEM_STR-LGNUM sy-vline 
WA_L2SKDLITEM_STR-REFNR sy-vline 
WA_L2SKDLITEM_STR-VBELN sy-vline 
WA_L2SKDLITEM_STR-POSNR sy-vline 
WA_L2SKDLITEM_STR-L2SKR sy-vline 
WA_L2SKDLITEM_STR-L2SKR_OLD sy-vline 
WA_L2SKDLITEM_STR-MATNR sy-vline 
WA_L2SKDLITEM_STR-WERKS sy-vline 
WA_L2SKDLITEM_STR-LGORT sy-vline 
WA_L2SKDLITEM_STR-CHARG sy-vline 
WA_L2SKDLITEM_STR-BESTQ sy-vline 
WA_L2SKDLITEM_STR-SOBKZ sy-vline 
WA_L2SKDLITEM_STR-BWTAR sy-vline 
WA_L2SKDLITEM_STR-LFIMG sy-vline 
WA_L2SKDLITEM_STR-LGMNG sy-vline 
WA_L2SKDLITEM_STR-KOMNG sy-vline 
WA_L2SKDLITEM_STR-KOMNA sy-vline 
WA_L2SKDLITEM_STR-MEINS sy-vline 
WA_L2SKDLITEM_STR-VRKME sy-vline 
WA_L2SKDLITEM_STR-UMVKZ sy-vline 
WA_L2SKDLITEM_STR-UMVKN sy-vline 
WA_L2SKDLITEM_STR-BRGEW sy-vline 
WA_L2SKDLITEM_STR-NTGEW sy-vline 
WA_L2SKDLITEM_STR-GEWEI sy-vline 
WA_L2SKDLITEM_STR-VOLUM sy-vline 
WA_L2SKDLITEM_STR-VOLEH sy-vline 
WA_L2SKDLITEM_STR-EMPST sy-vline 
WA_L2SKDLITEM_STR-KOMKZ sy-vline 
WA_L2SKDLITEM_STR-VSTEL sy-vline 
WA_L2SKDLITEM_STR-ROUTE sy-vline 
WA_L2SKDLITEM_STR-LPRIO sy-vline 
WA_L2SKDLITEM_STR-KODAT sy-vline 
WA_L2SKDLITEM_STR-LDDAT sy-vline 
WA_L2SKDLITEM_STR-KUNNR sy-vline 
WA_L2SKDLITEM_STR-LGTOR sy-vline 
WA_L2SKDLITEM_STR-LGBZO sy-vline 
WA_L2SKDLITEM_STR-SELKZ sy-vline 
WA_L2SKDLITEM_STR-VBELV sy-vline 
WA_L2SKDLITEM_STR-POSNV sy-vline 
WA_L2SKDLITEM_STR-PS_PSP_PNR sy-vline 
WA_L2SKDLITEM_STR-WIRME sy-vline 
WA_L2SKDLITEM_STR-SONUM sy-vline 
WA_L2SKDLITEM_STR-LSONR sy-vline 
WA_L2SKDLITEM_STR-SGT_RCAT sy-vline 
WA_L2SKDLITEM_STR-SGT_SCAT sy-vline      INTO ld_text SEPARATED BY SPACE.

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