ABAP Select data from SAP table ICAWRITEOFFH into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM ICAWRITEOFFH
*  INTO TABLE @DATA(IT_ICAWRITEOFFH2).
*--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_ICAWRITEOFFH INDEX 1 INTO DATA(WA_ICAWRITEOFFH2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<ICAWRITEOFFH>-MANDT = 1.
<ICAWRITEOFFH>-CAWRITEOFFDOCUMENTNUMBER = 1.
<ICAWRITEOFFH>-CADOCUMENTNUMBER = 1.
<ICAWRITEOFFH>-CAREPETITIONITEMNUMBER = 1.
<ICAWRITEOFFH>-CABPITEMNUMBER = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_ICAWRITEOFFH-CASUBITEMNUMBER, sy-vline,
  WA_ICAWRITEOFFH-COMPANYCODE, sy-vline,
  WA_ICAWRITEOFFH-BUSINESSPARTNER, sy-vline,
  WA_ICAWRITEOFFH-CONTRACTACCOUNT, sy-vline,
  WA_ICAWRITEOFFH-TRANSACTIONCURRENCY, sy-vline,
  WA_ICAWRITEOFFH-CAAMOUNTINTRANSACTIONCURRENCY, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_ICAWRITEOFFH 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_ICAWRITEOFFH 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_ICAWRITEOFFH INTO WA_ICAWRITEOFFH.


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

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

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

*Conversion exit ALPHA, internal->external for field CONTRACTACCOUNT
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_ICAWRITEOFFH-CONTRACTACCOUNT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ICAWRITEOFFH-CONTRACTACCOUNT.
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_ICAWRITEOFFH_STR, 
MANDT TYPE STRING,
CAWRITEOFFDOCUMENTNUMBER TYPE STRING,
CADOCUMENTNUMBER TYPE STRING,
CAREPETITIONITEMNUMBER TYPE STRING,
CABPITEMNUMBER TYPE STRING,
CASUBITEMNUMBER TYPE STRING,
COMPANYCODE TYPE STRING,
BUSINESSPARTNER TYPE STRING,
CONTRACTACCOUNT TYPE STRING,
TRANSACTIONCURRENCY TYPE STRING,
CAAMOUNTINTRANSACTIONCURRENCY TYPE STRING,
CAWRITEOFFREASON TYPE STRING,
CAWRITEOFFDATE TYPE STRING,
CASTATISTICALITEMCODE TYPE STRING,
ISSTATISTICAL TYPE STRING,
CADOCUMENTORIGINCODE TYPE STRING,
CADOCUMENTTYPE TYPE STRING,
CAWRITEOFFISREVERSED TYPE STRING,
CAMASSRUNDATE TYPE STRING,
CAMASSRUNID TYPE STRING,
CAAPPLICATIONAREA TYPE STRING,
CREATEDBYUSER TYPE STRING,END OF T_EKKO_STR.
DATA: WA_ICAWRITEOFFH_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_ICAWRITEOFFH_STR-MANDT sy-vline 
WA_ICAWRITEOFFH_STR-CAWRITEOFFDOCUMENTNUMBER sy-vline 
WA_ICAWRITEOFFH_STR-CADOCUMENTNUMBER sy-vline 
WA_ICAWRITEOFFH_STR-CAREPETITIONITEMNUMBER sy-vline 
WA_ICAWRITEOFFH_STR-CABPITEMNUMBER sy-vline 
WA_ICAWRITEOFFH_STR-CASUBITEMNUMBER sy-vline 
WA_ICAWRITEOFFH_STR-COMPANYCODE sy-vline 
WA_ICAWRITEOFFH_STR-BUSINESSPARTNER sy-vline 
WA_ICAWRITEOFFH_STR-CONTRACTACCOUNT sy-vline 
WA_ICAWRITEOFFH_STR-TRANSACTIONCURRENCY sy-vline 
WA_ICAWRITEOFFH_STR-CAAMOUNTINTRANSACTIONCURRENCY sy-vline 
WA_ICAWRITEOFFH_STR-CAWRITEOFFREASON sy-vline 
WA_ICAWRITEOFFH_STR-CAWRITEOFFDATE sy-vline 
WA_ICAWRITEOFFH_STR-CASTATISTICALITEMCODE sy-vline 
WA_ICAWRITEOFFH_STR-ISSTATISTICAL sy-vline 
WA_ICAWRITEOFFH_STR-CADOCUMENTORIGINCODE sy-vline 
WA_ICAWRITEOFFH_STR-CADOCUMENTTYPE sy-vline 
WA_ICAWRITEOFFH_STR-CAWRITEOFFISREVERSED sy-vline 
WA_ICAWRITEOFFH_STR-CAMASSRUNDATE sy-vline 
WA_ICAWRITEOFFH_STR-CAMASSRUNID sy-vline 
WA_ICAWRITEOFFH_STR-CAAPPLICATIONAREA sy-vline 
WA_ICAWRITEOFFH_STR-CREATEDBYUSER sy-vline      INTO ld_text SEPARATED BY SPACE.

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