ABAP Select data from SAP table CDUNNINGENTRITM into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM CDUNNINGENTRITM
*  INTO TABLE @DATA(IT_CDUNNINGENTRITM2).
*--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_CDUNNINGENTRITM INDEX 1 INTO DATA(WA_CDUNNINGENTRITM2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<CDUNNINGENTRITM>-MANDT = 1.
<CDUNNINGENTRITM>-DUNNINGRUNDATE = 1.
<CDUNNINGENTRITM>-DUNNINGRUN = 1.
<CDUNNINGENTRITM>-FINANCIALACCOUNTTYPE = 1.
<CDUNNINGENTRITM>-COMPANYCODE = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_CDUNNINGENTRITM-CUSTOMER, sy-vline,
  WA_CDUNNINGENTRITM-SUPPLIER, sy-vline,
  WA_CDUNNINGENTRITM-ONETIMEACCTBANKACCOUNT, sy-vline,
  WA_CDUNNINGENTRITM-CUSTOMERHEADOFFICE, sy-vline,
  WA_CDUNNINGENTRITM-GROUPINGDUNNINGAREA, sy-vline,
  WA_CDUNNINGENTRITM-GROUPINGDUNNINGLEVEL, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_CDUNNINGENTRITM 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_CDUNNINGENTRITM 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_CDUNNINGENTRITM INTO WA_CDUNNINGENTRITM.


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

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

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

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

*Conversion exit GJAHR, internal->external for field FISCALYEAR
CALL FUNCTION 'CONVERSION_EXIT_GJAHR_OUTPUT'
  EXPORTING
    input =                      WA_CDUNNINGENTRITM-FISCALYEAR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_CDUNNINGENTRITM-FISCALYEAR.
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_CDUNNINGENTRITM_STR, 
MANDT TYPE STRING,
DUNNINGRUNDATE TYPE STRING,
DUNNINGRUN TYPE STRING,
FINANCIALACCOUNTTYPE TYPE STRING,
COMPANYCODE TYPE STRING,
CUSTOMER TYPE STRING,
SUPPLIER TYPE STRING,
ONETIMEACCTBANKACCOUNT TYPE STRING,
CUSTOMERHEADOFFICE TYPE STRING,
GROUPINGDUNNINGAREA TYPE STRING,
GROUPINGDUNNINGLEVEL TYPE STRING,
REFERENCEDOCUMENTCOMPANYCODE TYPE STRING,
JOURNALENTRY TYPE STRING,
FISCALYEAR TYPE STRING,
JOURNALENTRYITEM TYPE STRING,
DUNNINGBLOCKINGREASON TYPE STRING,
NETDUEDATE TYPE STRING,
DUNNINGLEVEL TYPE STRING,
NETDUEARREARSDAYS TYPE STRING,
AMOUNTINTRANSACTIONCURRENCY TYPE STRING,
TRANSACTIONCURRENCY TYPE STRING,
ORIGINALREFERENCEDOCUMENT TYPE STRING,
REFERENCEDOCUMENTTYPE TYPE STRING,
COMPANYCODENAME TYPE STRING,
DOCUMENTREFERENCEID TYPE STRING,END OF T_EKKO_STR.
DATA: WA_CDUNNINGENTRITM_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_CDUNNINGENTRITM_STR-MANDT sy-vline 
WA_CDUNNINGENTRITM_STR-DUNNINGRUNDATE sy-vline 
WA_CDUNNINGENTRITM_STR-DUNNINGRUN sy-vline 
WA_CDUNNINGENTRITM_STR-FINANCIALACCOUNTTYPE sy-vline 
WA_CDUNNINGENTRITM_STR-COMPANYCODE sy-vline 
WA_CDUNNINGENTRITM_STR-CUSTOMER sy-vline 
WA_CDUNNINGENTRITM_STR-SUPPLIER sy-vline 
WA_CDUNNINGENTRITM_STR-ONETIMEACCTBANKACCOUNT sy-vline 
WA_CDUNNINGENTRITM_STR-CUSTOMERHEADOFFICE sy-vline 
WA_CDUNNINGENTRITM_STR-GROUPINGDUNNINGAREA sy-vline 
WA_CDUNNINGENTRITM_STR-GROUPINGDUNNINGLEVEL sy-vline 
WA_CDUNNINGENTRITM_STR-REFERENCEDOCUMENTCOMPANYCODE sy-vline 
WA_CDUNNINGENTRITM_STR-JOURNALENTRY sy-vline 
WA_CDUNNINGENTRITM_STR-FISCALYEAR sy-vline 
WA_CDUNNINGENTRITM_STR-JOURNALENTRYITEM sy-vline 
WA_CDUNNINGENTRITM_STR-DUNNINGBLOCKINGREASON sy-vline 
WA_CDUNNINGENTRITM_STR-NETDUEDATE sy-vline 
WA_CDUNNINGENTRITM_STR-DUNNINGLEVEL sy-vline 
WA_CDUNNINGENTRITM_STR-NETDUEARREARSDAYS sy-vline 
WA_CDUNNINGENTRITM_STR-AMOUNTINTRANSACTIONCURRENCY sy-vline 
WA_CDUNNINGENTRITM_STR-TRANSACTIONCURRENCY sy-vline 
WA_CDUNNINGENTRITM_STR-ORIGINALREFERENCEDOCUMENT sy-vline 
WA_CDUNNINGENTRITM_STR-REFERENCEDOCUMENTTYPE sy-vline 
WA_CDUNNINGENTRITM_STR-COMPANYCODENAME sy-vline 
WA_CDUNNINGENTRITM_STR-DOCUMENTREFERENCEID sy-vline      INTO ld_text SEPARATED BY SPACE.

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