ABAP Select data from SAP table L2SKTRITEM into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP L2SKTRITEM 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 L2SKTRITEM. 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 L2SKTRITEM 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_L2SKTRITEM TYPE STANDARD TABLE OF L2SKTRITEM,
      WA_L2SKTRITEM TYPE L2SKTRITEM,
      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: <L2SKTRITEM> TYPE L2SKTRITEM.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_L2SKTRITEM.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM L2SKTRITEM
  INTO TABLE IT_L2SKTRITEM.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM L2SKTRITEM
*  INTO TABLE @DATA(IT_L2SKTRITEM2).
*--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_L2SKTRITEM INDEX 1 INTO DATA(WA_L2SKTRITEM2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_L2SKTRITEM ASSIGNING <L2SKTRITEM>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<L2SKTRITEM>-LGNUM = 1.
<L2SKTRITEM>-REFNR = 1.
<L2SKTRITEM>-TBNUM = 1.
<L2SKTRITEM>-TBPOS = 1.
<L2SKTRITEM>-L2SKR = 1.

ENDLOOP.

LOOP AT IT_L2SKTRITEM INTO WA_L2SKTRITEM.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_L2SKTRITEM-L2SKR_OLD, sy-vline,
  WA_L2SKTRITEM-MATNR, sy-vline,
  WA_L2SKTRITEM-WERKS, sy-vline,
  WA_L2SKTRITEM-LGORT, sy-vline,
  WA_L2SKTRITEM-BESTQ, sy-vline,
  WA_L2SKTRITEM-CHARG, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_L2SKTRITEM 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_L2SKTRITEM 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_L2SKTRITEM INTO WA_L2SKTRITEM.


*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_L2SKTRITEM-REFNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_L2SKTRITEM-REFNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit MATN1, internal->external for field MATNR
CALL FUNCTION 'CONVERSION_EXIT_MATN1_OUTPUT'
  EXPORTING
    input =                      WA_L2SKTRITEM-MATNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_L2SKTRITEM-MATNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field SONUM
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_L2SKTRITEM-SONUM
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_L2SKTRITEM-SONUM.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field MEINS
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_L2SKTRITEM-MEINS
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_L2SKTRITEM-MEINS.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field ALTME
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_L2SKTRITEM-ALTME
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_L2SKTRITEM-ALTME.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field GEWEI
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_L2SKTRITEM-GEWEI
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_L2SKTRITEM-GEWEI.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field BENUM
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_L2SKTRITEM-BENUM
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_L2SKTRITEM-BENUM.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field WIRME
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_L2SKTRITEM-WIRME
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_L2SKTRITEM-WIRME.
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_L2SKTRITEM_STR, 
LGNUM TYPE STRING,
REFNR TYPE STRING,
TBNUM TYPE STRING,
TBPOS TYPE STRING,
L2SKR TYPE STRING,
L2SKR_OLD TYPE STRING,
MATNR TYPE STRING,
WERKS TYPE STRING,
LGORT TYPE STRING,
BESTQ TYPE STRING,
CHARG TYPE STRING,
SOBKZ TYPE STRING,
SONUM TYPE STRING,
LSONR TYPE STRING,
MENGE TYPE STRING,
MEINS TYPE STRING,
MENGA TYPE STRING,
ALTME TYPE STRING,
UMREZ TYPE STRING,
UMREN TYPE STRING,
TAMEN TYPE STRING,
TAMEA TYPE STRING,
OFMNG TYPE STRING,
OFMNA TYPE STRING,
WEMPF TYPE STRING,
ABLAD TYPE STRING,
BRGEW TYPE STRING,
GEWEI TYPE STRING,
BETYP TYPE STRING,
BENUM TYPE STRING,
PDATU TYPE STRING,
PZEIT TYPE STRING,
NLTYP TYPE STRING,
NLPLA TYPE STRING,
SELKZ TYPE STRING,
WIRME TYPE STRING,END OF T_EKKO_STR.
DATA: WA_L2SKTRITEM_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_L2SKTRITEM_STR-LGNUM sy-vline 
WA_L2SKTRITEM_STR-REFNR sy-vline 
WA_L2SKTRITEM_STR-TBNUM sy-vline 
WA_L2SKTRITEM_STR-TBPOS sy-vline 
WA_L2SKTRITEM_STR-L2SKR sy-vline 
WA_L2SKTRITEM_STR-L2SKR_OLD sy-vline 
WA_L2SKTRITEM_STR-MATNR sy-vline 
WA_L2SKTRITEM_STR-WERKS sy-vline 
WA_L2SKTRITEM_STR-LGORT sy-vline 
WA_L2SKTRITEM_STR-BESTQ sy-vline 
WA_L2SKTRITEM_STR-CHARG sy-vline 
WA_L2SKTRITEM_STR-SOBKZ sy-vline 
WA_L2SKTRITEM_STR-SONUM sy-vline 
WA_L2SKTRITEM_STR-LSONR sy-vline 
WA_L2SKTRITEM_STR-MENGE sy-vline 
WA_L2SKTRITEM_STR-MEINS sy-vline 
WA_L2SKTRITEM_STR-MENGA sy-vline 
WA_L2SKTRITEM_STR-ALTME sy-vline 
WA_L2SKTRITEM_STR-UMREZ sy-vline 
WA_L2SKTRITEM_STR-UMREN sy-vline 
WA_L2SKTRITEM_STR-TAMEN sy-vline 
WA_L2SKTRITEM_STR-TAMEA sy-vline 
WA_L2SKTRITEM_STR-OFMNG sy-vline 
WA_L2SKTRITEM_STR-OFMNA sy-vline 
WA_L2SKTRITEM_STR-WEMPF sy-vline 
WA_L2SKTRITEM_STR-ABLAD sy-vline 
WA_L2SKTRITEM_STR-BRGEW sy-vline 
WA_L2SKTRITEM_STR-GEWEI sy-vline 
WA_L2SKTRITEM_STR-BETYP sy-vline 
WA_L2SKTRITEM_STR-BENUM sy-vline 
WA_L2SKTRITEM_STR-PDATU sy-vline 
WA_L2SKTRITEM_STR-PZEIT sy-vline 
WA_L2SKTRITEM_STR-NLTYP sy-vline 
WA_L2SKTRITEM_STR-NLPLA sy-vline 
WA_L2SKTRITEM_STR-SELKZ sy-vline 
WA_L2SKTRITEM_STR-WIRME sy-vline      INTO ld_text SEPARATED BY SPACE.

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