ABAP Select data from SAP table KE1_WU_ITEM into internal table

Get Example source ABAP code based on a different SAP table
  Get ABAP code

Below is a number of ABAP code snippets to demonstrate how to select data from SAP KE1_WU_ITEM 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 KE1_WU_ITEM. 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 KE1_WU_ITEM 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_KE1_WU_ITEM TYPE STANDARD TABLE OF KE1_WU_ITEM,
      WA_KE1_WU_ITEM TYPE KE1_WU_ITEM,
      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: <KE1_WU_ITEM> TYPE KE1_WU_ITEM.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_KE1_WU_ITEM.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM KE1_WU_ITEM
  INTO TABLE IT_KE1_WU_ITEM.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM KE1_WU_ITEM
*  INTO TABLE @DATA(IT_KE1_WU_ITEM2).
*--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_KE1_WU_ITEM INDEX 1 INTO DATA(WA_KE1_WU_ITEM2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_KE1_WU_ITEM ASSIGNING <KE1_WU_ITEM>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<KE1_WU_ITEM>-MANDT = 1.
<KE1_WU_ITEM>-RUNID = 1.
<KE1_WU_ITEM>-APPL = 1.
<KE1_WU_ITEM>-SUBKEY = 1.
<KE1_WU_ITEM>-PRCTR = 1.

ENDLOOP.

LOOP AT IT_KE1_WU_ITEM INTO WA_KE1_WU_ITEM.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_KE1_WU_ITEM-OBJNR, sy-vline,
  WA_KE1_WU_ITEM-MATNR, sy-vline,
  WA_KE1_WU_ITEM-WERKS, sy-vline,
  WA_KE1_WU_ITEM-SEGMENT, sy-vline,
  WA_KE1_WU_ITEM-BUKRS, sy-vline,
  WA_KE1_WU_ITEM-VERAK, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_KE1_WU_ITEM 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_KE1_WU_ITEM 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_KE1_WU_ITEM INTO WA_KE1_WU_ITEM.


*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 PRCTR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_KE1_WU_ITEM-PRCTR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_KE1_WU_ITEM-PRCTR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit MATN1, internal->external for field MATNR
CALL FUNCTION 'CONVERSION_EXIT_MATN1_OUTPUT'
  EXPORTING
    input =                      WA_KE1_WU_ITEM-MATNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_KE1_WU_ITEM-MATNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field SEGMENT
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_KE1_WU_ITEM-SEGMENT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_KE1_WU_ITEM-SEGMENT.
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_KE1_WU_ITEM_STR, 
MANDT TYPE STRING,
RUNID TYPE STRING,
APPL TYPE STRING,
SUBKEY TYPE STRING,
PRCTR TYPE STRING,
OBJNR TYPE STRING,
MATNR TYPE STRING,
WERKS TYPE STRING,
SEGMENT TYPE STRING,
BUKRS TYPE STRING,
VERAK TYPE STRING,
GSBER TYPE STRING,END OF T_EKKO_STR.
DATA: WA_KE1_WU_ITEM_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_KE1_WU_ITEM_STR-MANDT sy-vline 
WA_KE1_WU_ITEM_STR-RUNID sy-vline 
WA_KE1_WU_ITEM_STR-APPL sy-vline 
WA_KE1_WU_ITEM_STR-SUBKEY sy-vline 
WA_KE1_WU_ITEM_STR-PRCTR sy-vline 
WA_KE1_WU_ITEM_STR-OBJNR sy-vline 
WA_KE1_WU_ITEM_STR-MATNR sy-vline 
WA_KE1_WU_ITEM_STR-WERKS sy-vline 
WA_KE1_WU_ITEM_STR-SEGMENT sy-vline 
WA_KE1_WU_ITEM_STR-BUKRS sy-vline 
WA_KE1_WU_ITEM_STR-VERAK sy-vline 
WA_KE1_WU_ITEM_STR-GSBER sy-vline      INTO ld_text SEPARATED BY SPACE.

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