ABAP Select data from SAP table IATCITMCANCEVENT into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM IATCITMCANCEVENT
*  INTO TABLE @DATA(IT_IATCITMCANCEVENT2).
*--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_IATCITMCANCEVENT INDEX 1 INTO DATA(WA_IATCITMCANCEVENT2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<IATCITMCANCEVENT>-MANDT = 1.
<IATCITMCANCEVENT>-TRADINGCONTRACTNUMBER = 1.
<IATCITMCANCEVENT>-TRADINGCONTRACTITEM = 1.
<IATCITMCANCEVENT>-CONTRACTQTYCANCELLATIONUUID = 1.
<IATCITMCANCEVENT>-ACMCONTRCANCLNSQNCNMBR = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_IATCITMCANCEVENT-ACMCANCELLATIONTYPE, sy-vline,
  WA_IATCITMCANCEVENT-ACMCANCELLATIONTYPENAME, sy-vline,
  WA_IATCITMCANCEVENT-ACMOBLIGATIONLINKID, sy-vline,
  WA_IATCITMCANCEVENT-PURGREASONFORDOCCANCELLATION, sy-vline,
  WA_IATCITMCANCEVENT-ACMCANCELLATIONREVERSALSTATUS, sy-vline,
  WA_IATCITMCANCEVENT-ACMCANCELLATIONDATE, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_IATCITMCANCEVENT 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_IATCITMCANCEVENT 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_IATCITMCANCEVENT INTO WA_IATCITMCANCEVENT.


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

*Conversion exit ALPHA, internal->external for field ACMOBLIGATIONLINKID
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_IATCITMCANCEVENT-ACMOBLIGATIONLINKID
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_IATCITMCANCEVENT-ACMOBLIGATIONLINKID.
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_IATCITMCANCEVENT_STR, 
MANDT TYPE STRING,
TRADINGCONTRACTNUMBER TYPE STRING,
TRADINGCONTRACTITEM TYPE STRING,
CONTRACTQTYCANCELLATIONUUID TYPE STRING,
ACMCONTRCANCLNSQNCNMBR TYPE STRING,
ACMCANCELLATIONTYPE TYPE STRING,
ACMCANCELLATIONTYPENAME TYPE STRING,
ACMOBLIGATIONLINKID TYPE STRING,
PURGREASONFORDOCCANCELLATION TYPE STRING,
ACMCANCELLATIONREVERSALSTATUS TYPE STRING,
ACMCANCELLATIONDATE TYPE STRING,
RATETYPE TYPE STRING,
ACMSETTLMTCRCY TYPE STRING,
EFFECTIVEDATE TYPE STRING,END OF T_EKKO_STR.
DATA: WA_IATCITMCANCEVENT_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_IATCITMCANCEVENT_STR-MANDT sy-vline 
WA_IATCITMCANCEVENT_STR-TRADINGCONTRACTNUMBER sy-vline 
WA_IATCITMCANCEVENT_STR-TRADINGCONTRACTITEM sy-vline 
WA_IATCITMCANCEVENT_STR-CONTRACTQTYCANCELLATIONUUID sy-vline 
WA_IATCITMCANCEVENT_STR-ACMCONTRCANCLNSQNCNMBR sy-vline 
WA_IATCITMCANCEVENT_STR-ACMCANCELLATIONTYPE sy-vline 
WA_IATCITMCANCEVENT_STR-ACMCANCELLATIONTYPENAME sy-vline 
WA_IATCITMCANCEVENT_STR-ACMOBLIGATIONLINKID sy-vline 
WA_IATCITMCANCEVENT_STR-PURGREASONFORDOCCANCELLATION sy-vline 
WA_IATCITMCANCEVENT_STR-ACMCANCELLATIONREVERSALSTATUS sy-vline 
WA_IATCITMCANCEVENT_STR-ACMCANCELLATIONDATE sy-vline 
WA_IATCITMCANCEVENT_STR-RATETYPE sy-vline 
WA_IATCITMCANCEVENT_STR-ACMSETTLMTCRCY sy-vline 
WA_IATCITMCANCEVENT_STR-EFFECTIVEDATE sy-vline      INTO ld_text SEPARATED BY SPACE.

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