ABAP Select data from SAP table HRMS_BW_IS_CANCELLATION into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM HRMS_BW_IS_CANCELLATION
*  INTO TABLE @DATA(IT_HRMS_BW_IS_CANCELLATION2).
*--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_HRMS_BW_IS_CANCELLATION INDEX 1 INTO DATA(WA_HRMS_BW_IS_CANCELLATION2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<HRMS_BW_IS_CANCELLATION>-CALDAY = 1.
<HRMS_BW_IS_CANCELLATION>-GRPID = 1.
<HRMS_BW_IS_CANCELLATION>-ETYID = 1.
<HRMS_BW_IS_CANCELLATION>-EVEID = 1.
<HRMS_BW_IS_CANCELLATION>-PATYP = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_HRMS_BW_IS_CANCELLATION-PARID, sy-vline,
  WA_HRMS_BW_IS_CANCELLATION-PRIOX, sy-vline,
  WA_HRMS_BW_IS_CANCELLATION-CADAT, sy-vline,
  WA_HRMS_BW_IS_CANCELLATION-MANZL, sy-vline,
  WA_HRMS_BW_IS_CANCELLATION-KOKRS, sy-vline,
  WA_HRMS_BW_IS_CANCELLATION-KOSTL, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_HRMS_BW_IS_CANCELLATION 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_HRMS_BW_IS_CANCELLATION 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_HRMS_BW_IS_CANCELLATION INTO WA_HRMS_BW_IS_CANCELLATION.


*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 KOSTL
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_HRMS_BW_IS_CANCELLATION-KOSTL
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_HRMS_BW_IS_CANCELLATION-KOSTL.
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_HRMS_BW_IS_CANCELLATION_STR, 
CALDAY TYPE STRING,
GRPID TYPE STRING,
ETYID TYPE STRING,
EVEID TYPE STRING,
PATYP TYPE STRING,
PARID TYPE STRING,
PRIOX TYPE STRING,
CADAT TYPE STRING,
MANZL TYPE STRING,
KOKRS TYPE STRING,
KOSTL TYPE STRING,
KKOST TYPE STRING,
KWAER TYPE STRING,
INTEX TYPE STRING,
REASON TYPE STRING,
STATUS TYPE STRING,END OF T_EKKO_STR.
DATA: WA_HRMS_BW_IS_CANCELLATION_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_HRMS_BW_IS_CANCELLATION_STR-CALDAY sy-vline 
WA_HRMS_BW_IS_CANCELLATION_STR-GRPID sy-vline 
WA_HRMS_BW_IS_CANCELLATION_STR-ETYID sy-vline 
WA_HRMS_BW_IS_CANCELLATION_STR-EVEID sy-vline 
WA_HRMS_BW_IS_CANCELLATION_STR-PATYP sy-vline 
WA_HRMS_BW_IS_CANCELLATION_STR-PARID sy-vline 
WA_HRMS_BW_IS_CANCELLATION_STR-PRIOX sy-vline 
WA_HRMS_BW_IS_CANCELLATION_STR-CADAT sy-vline 
WA_HRMS_BW_IS_CANCELLATION_STR-MANZL sy-vline 
WA_HRMS_BW_IS_CANCELLATION_STR-KOKRS sy-vline 
WA_HRMS_BW_IS_CANCELLATION_STR-KOSTL sy-vline 
WA_HRMS_BW_IS_CANCELLATION_STR-KKOST sy-vline 
WA_HRMS_BW_IS_CANCELLATION_STR-KWAER sy-vline 
WA_HRMS_BW_IS_CANCELLATION_STR-INTEX sy-vline 
WA_HRMS_BW_IS_CANCELLATION_STR-REASON sy-vline 
WA_HRMS_BW_IS_CANCELLATION_STR-STATUS sy-vline      INTO ld_text SEPARATED BY SPACE.

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