ABAP Select data from SAP table J_3RKORRREP_ALV_ITEM into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP J_3RKORRREP_ALV_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 J_3RKORRREP_ALV_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 J_3RKORRREP_ALV_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_J_3RKORRREP_ALV_ITEM TYPE STANDARD TABLE OF J_3RKORRREP_ALV_ITEM,
      WA_J_3RKORRREP_ALV_ITEM TYPE J_3RKORRREP_ALV_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: <J_3RKORRREP_ALV_ITEM> TYPE J_3RKORRREP_ALV_ITEM.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_J_3RKORRREP_ALV_ITEM.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM J_3RKORRREP_ALV_ITEM
  INTO TABLE IT_J_3RKORRREP_ALV_ITEM.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM J_3RKORRREP_ALV_ITEM
*  INTO TABLE @DATA(IT_J_3RKORRREP_ALV_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_J_3RKORRREP_ALV_ITEM INDEX 1 INTO DATA(WA_J_3RKORRREP_ALV_ITEM2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_J_3RKORRREP_ALV_ITEM ASSIGNING <J_3RKORRREP_ALV_ITEM>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<J_3RKORRREP_ALV_ITEM>-DEBIT = 1.
<J_3RKORRREP_ALV_ITEM>-GSBER = 1.
<J_3RKORRREP_ALV_ITEM>-DUMMY = 1.
<J_3RKORRREP_ALV_ITEM>-CREDIT = 1.
<J_3RKORRREP_ALV_ITEM>-GSBERK = 1.

ENDLOOP.

LOOP AT IT_J_3RKORRREP_ALV_ITEM INTO WA_J_3RKORRREP_ALV_ITEM.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_J_3RKORRREP_ALV_ITEM-BELNR, sy-vline,
  WA_J_3RKORRREP_ALV_ITEM-BUDAT, sy-vline,
  WA_J_3RKORRREP_ALV_ITEM-DLIFNR, sy-vline,
  WA_J_3RKORRREP_ALV_ITEM-DLNAME, sy-vline,
  WA_J_3RKORRREP_ALV_ITEM-DKUNNR, sy-vline,
  WA_J_3RKORRREP_ALV_ITEM-DKNAME, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_J_3RKORRREP_ALV_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_J_3RKORRREP_ALV_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_J_3RKORRREP_ALV_ITEM INTO WA_J_3RKORRREP_ALV_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 DEBIT
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_J_3RKORRREP_ALV_ITEM-DEBIT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_J_3RKORRREP_ALV_ITEM-DEBIT.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field CREDIT
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_J_3RKORRREP_ALV_ITEM-CREDIT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_J_3RKORRREP_ALV_ITEM-CREDIT.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field BELNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_J_3RKORRREP_ALV_ITEM-BELNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_J_3RKORRREP_ALV_ITEM-BELNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field DLIFNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_J_3RKORRREP_ALV_ITEM-DLIFNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_J_3RKORRREP_ALV_ITEM-DLIFNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field DKUNNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_J_3RKORRREP_ALV_ITEM-DKUNNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_J_3RKORRREP_ALV_ITEM-DKUNNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field KLIFNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_J_3RKORRREP_ALV_ITEM-KLIFNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_J_3RKORRREP_ALV_ITEM-KLIFNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field KKUNNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_J_3RKORRREP_ALV_ITEM-KKUNNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_J_3RKORRREP_ALV_ITEM-KKUNNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit AC152, internal->external for field BEG_BAL
CALL FUNCTION 'CONVERSION_EXIT_AC152_OUTPUT'
  EXPORTING
    input =                      WA_J_3RKORRREP_ALV_ITEM-BEG_BAL
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_J_3RKORRREP_ALV_ITEM-BEG_BAL.
WRITE:/ 'New Value:', ld_input.

*Conversion exit AC152, internal->external for field END_BAL
CALL FUNCTION 'CONVERSION_EXIT_AC152_OUTPUT'
  EXPORTING
    input =                      WA_J_3RKORRREP_ALV_ITEM-END_BAL
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_J_3RKORRREP_ALV_ITEM-END_BAL.
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_J_3RKORRREP_ALV_ITEM_STR, 
DEBIT TYPE STRING,
GSBER TYPE STRING,
DUMMY TYPE STRING,
CREDIT TYPE STRING,
GSBERK TYPE STRING,
BELNR TYPE STRING,
BUDAT TYPE STRING,
DLIFNR TYPE STRING,
DLNAME TYPE STRING,
DKUNNR TYPE STRING,
DKNAME TYPE STRING,
KLIFNR TYPE STRING,
KLNAME TYPE STRING,
KKUNNR TYPE STRING,
KKNAME TYPE STRING,
BEG_BAL TYPE STRING,
END_BAL TYPE STRING,
WAERS TYPE STRING,
NOTE1 TYPE STRING,
NOTE2 TYPE STRING,END OF T_EKKO_STR.
DATA: WA_J_3RKORRREP_ALV_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_J_3RKORRREP_ALV_ITEM_STR-DEBIT sy-vline 
WA_J_3RKORRREP_ALV_ITEM_STR-GSBER sy-vline 
WA_J_3RKORRREP_ALV_ITEM_STR-DUMMY sy-vline 
WA_J_3RKORRREP_ALV_ITEM_STR-CREDIT sy-vline 
WA_J_3RKORRREP_ALV_ITEM_STR-GSBERK sy-vline 
WA_J_3RKORRREP_ALV_ITEM_STR-BELNR sy-vline 
WA_J_3RKORRREP_ALV_ITEM_STR-BUDAT sy-vline 
WA_J_3RKORRREP_ALV_ITEM_STR-DLIFNR sy-vline 
WA_J_3RKORRREP_ALV_ITEM_STR-DLNAME sy-vline 
WA_J_3RKORRREP_ALV_ITEM_STR-DKUNNR sy-vline 
WA_J_3RKORRREP_ALV_ITEM_STR-DKNAME sy-vline 
WA_J_3RKORRREP_ALV_ITEM_STR-KLIFNR sy-vline 
WA_J_3RKORRREP_ALV_ITEM_STR-KLNAME sy-vline 
WA_J_3RKORRREP_ALV_ITEM_STR-KKUNNR sy-vline 
WA_J_3RKORRREP_ALV_ITEM_STR-KKNAME sy-vline 
WA_J_3RKORRREP_ALV_ITEM_STR-BEG_BAL sy-vline 
WA_J_3RKORRREP_ALV_ITEM_STR-END_BAL sy-vline 
WA_J_3RKORRREP_ALV_ITEM_STR-WAERS sy-vline 
WA_J_3RKORRREP_ALV_ITEM_STR-NOTE1 sy-vline 
WA_J_3RKORRREP_ALV_ITEM_STR-NOTE2 sy-vline      INTO ld_text SEPARATED BY SPACE.

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