ABAP Select data from SAP table COVERDUESITNANCR into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM COVERDUESITNANCR
*  INTO TABLE @DATA(IT_COVERDUESITNANCR2).
*--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_COVERDUESITNANCR INDEX 1 INTO DATA(WA_COVERDUESITNANCR2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<COVERDUESITNANCR>-MANDT = 1.
<COVERDUESITNANCR>-MATLOVERDUESITSITNANCHRID = 1.
<COVERDUESITNANCR>-PURCHASEORDER = 1.
<COVERDUESITNANCR>-PURCHASEORDERITEM = 1.
<COVERDUESITNANCR>-CREATEDBYUSER = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_COVERDUESITNANCR-CREATEDBYUSERDESCRIPTION, sy-vline,
  WA_COVERDUESITNANCR-CREATIONDATE, sy-vline,
  WA_COVERDUESITNANCR-ISSUINGCOMPANYCODE, sy-vline,
  WA_COVERDUESITNANCR-ISSUINGPLANT, sy-vline,
  WA_COVERDUESITNANCR-ISSUINGPLANTNAME, sy-vline,
  WA_COVERDUESITNANCR-RECEIVINGCOMPANYCODE, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_COVERDUESITNANCR 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_COVERDUESITNANCR 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_COVERDUESITNANCR INTO WA_COVERDUESITNANCR.


*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 PURCHASEORDER
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_COVERDUESITNANCR-PURCHASEORDER
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_COVERDUESITNANCR-PURCHASEORDER.
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_COVERDUESITNANCR_STR, 
MANDT TYPE STRING,
MATLOVERDUESITSITNANCHRID TYPE STRING,
PURCHASEORDER TYPE STRING,
PURCHASEORDERITEM TYPE STRING,
CREATEDBYUSER TYPE STRING,
CREATEDBYUSERDESCRIPTION TYPE STRING,
CREATIONDATE TYPE STRING,
ISSUINGCOMPANYCODE TYPE STRING,
ISSUINGPLANT TYPE STRING,
ISSUINGPLANTNAME TYPE STRING,
RECEIVINGCOMPANYCODE TYPE STRING,
RECEIVINGPLANT TYPE STRING,
RECEIVINGPLANTNAME TYPE STRING,
RECEIVINGPLANTMRPRESPONSIBLE TYPE STRING,END OF T_EKKO_STR.
DATA: WA_COVERDUESITNANCR_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_COVERDUESITNANCR_STR-MANDT sy-vline 
WA_COVERDUESITNANCR_STR-MATLOVERDUESITSITNANCHRID sy-vline 
WA_COVERDUESITNANCR_STR-PURCHASEORDER sy-vline 
WA_COVERDUESITNANCR_STR-PURCHASEORDERITEM sy-vline 
WA_COVERDUESITNANCR_STR-CREATEDBYUSER sy-vline 
WA_COVERDUESITNANCR_STR-CREATEDBYUSERDESCRIPTION sy-vline 
WA_COVERDUESITNANCR_STR-CREATIONDATE sy-vline 
WA_COVERDUESITNANCR_STR-ISSUINGCOMPANYCODE sy-vline 
WA_COVERDUESITNANCR_STR-ISSUINGPLANT sy-vline 
WA_COVERDUESITNANCR_STR-ISSUINGPLANTNAME sy-vline 
WA_COVERDUESITNANCR_STR-RECEIVINGCOMPANYCODE sy-vline 
WA_COVERDUESITNANCR_STR-RECEIVINGPLANT sy-vline 
WA_COVERDUESITNANCR_STR-RECEIVINGPLANTNAME sy-vline 
WA_COVERDUESITNANCR_STR-RECEIVINGPLANTMRPRESPONSIBLE sy-vline      INTO ld_text SEPARATED BY SPACE.

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