ABAP Select data from SAP table ICARETURNNTCHEAD into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM ICARETURNNTCHEAD
*  INTO TABLE @DATA(IT_ICARETURNNTCHEAD2).
*--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_ICARETURNNTCHEAD INDEX 1 INTO DATA(WA_ICARETURNNTCHEAD2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<ICARETURNNTCHEAD>-MANDT = 1.
<ICARETURNNTCHEAD>-CARETURNDOCUMENTNUMBER = 1.
<ICARETURNNTCHEAD>-CACORRESPONDENCE = 1.
<ICARETURNNTCHEAD>-BUSINESSPARTNER = 1.
<ICARETURNNTCHEAD>-CONTRACTACCOUNT = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_ICARETURNNTCHEAD-CORRESPONDENCEISSUEDATE, sy-vline,
  WA_ICARETURNNTCHEAD-CURRENCY, sy-vline,
  WA_ICARETURNNTCHEAD-COMPANYCODE, sy-vline,
  WA_ICARETURNNTCHEAD-CACORRESPONDENCETYPE, sy-vline,
  WA_ICARETURNNTCHEAD-CACONTRACT, sy-vline,
  WA_ICARETURNNTCHEAD-CONTRACTACCOUNTNAME, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_ICARETURNNTCHEAD 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_ICARETURNNTCHEAD 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_ICARETURNNTCHEAD INTO WA_ICARETURNNTCHEAD.


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

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

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

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

*Conversion exit ALPHA, internal->external for field CADOCUMENTNUMBER
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_ICARETURNNTCHEAD-CADOCUMENTNUMBER
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ICARETURNNTCHEAD-CADOCUMENTNUMBER.
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_ICARETURNNTCHEAD_STR, 
MANDT TYPE STRING,
CARETURNDOCUMENTNUMBER TYPE STRING,
CACORRESPONDENCE TYPE STRING,
BUSINESSPARTNER TYPE STRING,
CONTRACTACCOUNT TYPE STRING,
CORRESPONDENCEISSUEDATE TYPE STRING,
CURRENCY TYPE STRING,
COMPANYCODE TYPE STRING,
CACORRESPONDENCETYPE TYPE STRING,
CACONTRACT TYPE STRING,
CONTRACTACCOUNTNAME TYPE STRING,
CABANKACCOUNTOFBUSINESSPARTNER TYPE STRING,
CABANKNUMBEROFBUSINESSPARTNER TYPE STRING,
CABANKINGCOUNTRYOFBUSPART TYPE STRING,
IBAN TYPE STRING,
CANUMBEROFRETURNEDCHEQUE TYPE STRING,
CARETURNREASON TYPE STRING,
CADOCUMENTNUMBER TYPE STRING,
DOCUMENTDATE TYPE STRING,
CAINCGPAYLOCKRSNFORCONTRACCT TYPE STRING,
CAOUTGPAYLOCKRSNFORCONTRACCT TYPE STRING,
CAPAYMENTMETHODFORINCGPAYMENT TYPE STRING,
CARETURNAMOUNT TYPE STRING,
CARETURNCHARGE1 TYPE STRING,
CATAXAMOUNTFORRETURNCHARGE1 TYPE STRING,
CARETURNLOT TYPE STRING,
CAITEMNUMBERINRETURNLOT TYPE STRING,
CADOCUMENTTYPE TYPE STRING,END OF T_EKKO_STR.
DATA: WA_ICARETURNNTCHEAD_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_ICARETURNNTCHEAD_STR-MANDT sy-vline 
WA_ICARETURNNTCHEAD_STR-CARETURNDOCUMENTNUMBER sy-vline 
WA_ICARETURNNTCHEAD_STR-CACORRESPONDENCE sy-vline 
WA_ICARETURNNTCHEAD_STR-BUSINESSPARTNER sy-vline 
WA_ICARETURNNTCHEAD_STR-CONTRACTACCOUNT sy-vline 
WA_ICARETURNNTCHEAD_STR-CORRESPONDENCEISSUEDATE sy-vline 
WA_ICARETURNNTCHEAD_STR-CURRENCY sy-vline 
WA_ICARETURNNTCHEAD_STR-COMPANYCODE sy-vline 
WA_ICARETURNNTCHEAD_STR-CACORRESPONDENCETYPE sy-vline 
WA_ICARETURNNTCHEAD_STR-CACONTRACT sy-vline 
WA_ICARETURNNTCHEAD_STR-CONTRACTACCOUNTNAME sy-vline 
WA_ICARETURNNTCHEAD_STR-CABANKACCOUNTOFBUSINESSPARTNER sy-vline 
WA_ICARETURNNTCHEAD_STR-CABANKNUMBEROFBUSINESSPARTNER sy-vline 
WA_ICARETURNNTCHEAD_STR-CABANKINGCOUNTRYOFBUSPART sy-vline 
WA_ICARETURNNTCHEAD_STR-IBAN sy-vline 
WA_ICARETURNNTCHEAD_STR-CANUMBEROFRETURNEDCHEQUE sy-vline 
WA_ICARETURNNTCHEAD_STR-CARETURNREASON sy-vline 
WA_ICARETURNNTCHEAD_STR-CADOCUMENTNUMBER sy-vline 
WA_ICARETURNNTCHEAD_STR-DOCUMENTDATE sy-vline 
WA_ICARETURNNTCHEAD_STR-CAINCGPAYLOCKRSNFORCONTRACCT sy-vline 
WA_ICARETURNNTCHEAD_STR-CAOUTGPAYLOCKRSNFORCONTRACCT sy-vline 
WA_ICARETURNNTCHEAD_STR-CAPAYMENTMETHODFORINCGPAYMENT sy-vline 
WA_ICARETURNNTCHEAD_STR-CARETURNAMOUNT sy-vline 
WA_ICARETURNNTCHEAD_STR-CARETURNCHARGE1 sy-vline 
WA_ICARETURNNTCHEAD_STR-CATAXAMOUNTFORRETURNCHARGE1 sy-vline 
WA_ICARETURNNTCHEAD_STR-CARETURNLOT sy-vline 
WA_ICARETURNNTCHEAD_STR-CAITEMNUMBERINRETURNLOT sy-vline 
WA_ICARETURNNTCHEAD_STR-CADOCUMENTTYPE sy-vline      INTO ld_text SEPARATED BY SPACE.

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