ABAP Select data from SAP table ISISCD_DUNNING_STR_DUNN_ITEM into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP ISISCD_DUNNING_STR_DUNN_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 ISISCD_DUNNING_STR_DUNN_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 ISISCD_DUNNING_STR_DUNN_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_ISISCD_DUNNING_STR_DUNN_ITEM TYPE STANDARD TABLE OF ISISCD_DUNNING_STR_DUNN_ITEM,
      WA_ISISCD_DUNNING_STR_DUNN_ITEM TYPE ISISCD_DUNNING_STR_DUNN_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: <ISISCD_DUNNING_STR_DUNN_ITEM> TYPE ISISCD_DUNNING_STR_DUNN_ITEM.

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM ISISCD_DUNNING_STR_DUNN_ITEM
*  INTO TABLE @DATA(IT_ISISCD_DUNNING_STR_DUNN_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_ISISCD_DUNNING_STR_DUNN_ITEM INDEX 1 INTO DATA(WA_ISISCD_DUNNING_STR_DUNN_ITEM2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<ISISCD_DUNNING_STR_DUNN_ITEM>-WA_DUNN_ITEM = 1.
<ISISCD_DUNNING_STR_DUNN_ITEM>-MANDT = 1.
<ISISCD_DUNNING_STR_DUNN_ITEM>-LAUFD = 1.
<ISISCD_DUNNING_STR_DUNN_ITEM>-LAUFI = 1.
<ISISCD_DUNNING_STR_DUNN_ITEM>-GPART = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_ISISCD_DUNNING_STR_DUNN_ITEM-VKONT, sy-vline,
  WA_ISISCD_DUNNING_STR_DUNN_ITEM-MAZAE, sy-vline,
  WA_ISISCD_DUNNING_STR_DUNN_ITEM-OPBEL, sy-vline,
  WA_ISISCD_DUNNING_STR_DUNN_ITEM-OPUPW, sy-vline,
  WA_ISISCD_DUNNING_STR_DUNN_ITEM-OPUPK, sy-vline,
  WA_ISISCD_DUNNING_STR_DUNN_ITEM-OPUPZ, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_ISISCD_DUNNING_STR_DUNN_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_ISISCD_DUNNING_STR_DUNN_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_ISISCD_DUNNING_STR_DUNN_ITEM INTO WA_ISISCD_DUNNING_STR_DUNN_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 GPART
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_ISISCD_DUNNING_STR_DUNN_ITEM-GPART
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ISISCD_DUNNING_STR_DUNN_ITEM-GPART.
WRITE:/ 'New Value:', ld_input.

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

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

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

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

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

*Conversion exit ALPHA, internal->external for field PRCTR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_ISISCD_DUNNING_STR_DUNN_ITEM-PRCTR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ISISCD_DUNNING_STR_DUNN_ITEM-PRCTR.
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_ISISCD_DUNNING_STR_DUNN_ITEM_STR, 
WA_DUNN_ITEM TYPE STRING,
MANDT TYPE STRING,
LAUFD TYPE STRING,
LAUFI TYPE STRING,
GPART TYPE STRING,
VKONT TYPE STRING,
MAZAE TYPE STRING,
OPBEL TYPE STRING,
OPUPW TYPE STRING,
OPUPK TYPE STRING,
OPUPZ TYPE STRING,
BUKRS TYPE STRING,
WAERS TYPE STRING,
MBETM TYPE STRING,
MBETH TYPE STRING,
FAEDN TYPE STRING,
MIBEL TYPE STRING,
MINTM TYPE STRING,
MAHNS TYPE STRING,
MSTYP TYPE STRING,
MAHNN TYPE STRING,
MANSP TYPE STRING,
XMFAK TYPE STRING,
XMSUS TYPE STRING,
XMSTO TYPE STRING,
XINFO TYPE STRING,
MDRKD TYPE STRING,
STAKZ TYPE STRING,
XMVKT TYPE STRING,
VTREF TYPE STRING,
SUBAP TYPE STRING,
SEGMENT TYPE STRING,
PRCTR TYPE STRING,
MAHNV TYPE STRING,
AUSDT TYPE STRING,
SPART TYPE STRING,
XTAUS TYPE STRING,
MOPUPZ TYPE STRING,
HIGHERDL TYPE STRING,
DALIN TYPE STRING,END OF T_EKKO_STR.
DATA: WA_ISISCD_DUNNING_STR_DUNN_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_ISISCD_DUNNING_STR_DUNN_ITEM_STR-WA_DUNN_ITEM sy-vline 
WA_ISISCD_DUNNING_STR_DUNN_ITEM_STR-MANDT sy-vline 
WA_ISISCD_DUNNING_STR_DUNN_ITEM_STR-LAUFD sy-vline 
WA_ISISCD_DUNNING_STR_DUNN_ITEM_STR-LAUFI sy-vline 
WA_ISISCD_DUNNING_STR_DUNN_ITEM_STR-GPART sy-vline 
WA_ISISCD_DUNNING_STR_DUNN_ITEM_STR-VKONT sy-vline 
WA_ISISCD_DUNNING_STR_DUNN_ITEM_STR-MAZAE sy-vline 
WA_ISISCD_DUNNING_STR_DUNN_ITEM_STR-OPBEL sy-vline 
WA_ISISCD_DUNNING_STR_DUNN_ITEM_STR-OPUPW sy-vline 
WA_ISISCD_DUNNING_STR_DUNN_ITEM_STR-OPUPK sy-vline 
WA_ISISCD_DUNNING_STR_DUNN_ITEM_STR-OPUPZ sy-vline 
WA_ISISCD_DUNNING_STR_DUNN_ITEM_STR-BUKRS sy-vline 
WA_ISISCD_DUNNING_STR_DUNN_ITEM_STR-WAERS sy-vline 
WA_ISISCD_DUNNING_STR_DUNN_ITEM_STR-MBETM sy-vline 
WA_ISISCD_DUNNING_STR_DUNN_ITEM_STR-MBETH sy-vline 
WA_ISISCD_DUNNING_STR_DUNN_ITEM_STR-FAEDN sy-vline 
WA_ISISCD_DUNNING_STR_DUNN_ITEM_STR-MIBEL sy-vline 
WA_ISISCD_DUNNING_STR_DUNN_ITEM_STR-MINTM sy-vline 
WA_ISISCD_DUNNING_STR_DUNN_ITEM_STR-MAHNS sy-vline 
WA_ISISCD_DUNNING_STR_DUNN_ITEM_STR-MSTYP sy-vline 
WA_ISISCD_DUNNING_STR_DUNN_ITEM_STR-MAHNN sy-vline 
WA_ISISCD_DUNNING_STR_DUNN_ITEM_STR-MANSP sy-vline 
WA_ISISCD_DUNNING_STR_DUNN_ITEM_STR-XMFAK sy-vline 
WA_ISISCD_DUNNING_STR_DUNN_ITEM_STR-XMSUS sy-vline 
WA_ISISCD_DUNNING_STR_DUNN_ITEM_STR-XMSTO sy-vline 
WA_ISISCD_DUNNING_STR_DUNN_ITEM_STR-XINFO sy-vline 
WA_ISISCD_DUNNING_STR_DUNN_ITEM_STR-MDRKD sy-vline 
WA_ISISCD_DUNNING_STR_DUNN_ITEM_STR-STAKZ sy-vline 
WA_ISISCD_DUNNING_STR_DUNN_ITEM_STR-XMVKT sy-vline 
WA_ISISCD_DUNNING_STR_DUNN_ITEM_STR-VTREF sy-vline 
WA_ISISCD_DUNNING_STR_DUNN_ITEM_STR-SUBAP sy-vline 
WA_ISISCD_DUNNING_STR_DUNN_ITEM_STR-SEGMENT sy-vline 
WA_ISISCD_DUNNING_STR_DUNN_ITEM_STR-PRCTR sy-vline 
WA_ISISCD_DUNNING_STR_DUNN_ITEM_STR-MAHNV sy-vline 
WA_ISISCD_DUNNING_STR_DUNN_ITEM_STR-AUSDT sy-vline 
WA_ISISCD_DUNNING_STR_DUNN_ITEM_STR-SPART sy-vline 
WA_ISISCD_DUNNING_STR_DUNN_ITEM_STR-XTAUS sy-vline 
WA_ISISCD_DUNNING_STR_DUNN_ITEM_STR-MOPUPZ sy-vline 
WA_ISISCD_DUNNING_STR_DUNN_ITEM_STR-HIGHERDL sy-vline 
WA_ISISCD_DUNNING_STR_DUNN_ITEM_STR-DALIN sy-vline      INTO ld_text SEPARATED BY SPACE.

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