ABAP Select data from SAP table MCOIRKOMV into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM MCOIRKOMV
*  INTO TABLE @DATA(IT_MCOIRKOMV2).
*--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_MCOIRKOMV INDEX 1 INTO DATA(WA_MCOIRKOMV2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<MCOIRKOMV>-OIRTOTGR = 1.
<MCOIRKOMV>-OIRPYTCDGR = 1.
<MCOIRKOMV>-OIRPFEENET = 1.
<MCOIRKOMV>-OIRPFEEVAT = 1.
<MCOIRKOMV>-OIRFLFUGR = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_MCOIRKOMV-OIRCOMMNET, sy-vline,
  WA_MCOIRKOMV-OIRCOMMVAT, sy-vline,
  WA_MCOIRKOMV-OIRFUGR, sy-vline,
  WA_MCOIRKOMV-OIRFUNET, sy-vline,
  WA_MCOIRKOMV-OIRFUVAT, sy-vline,
  WA_MCOIRKOMV-OIRDOPGR, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_MCOIRKOMV 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_MCOIRKOMV 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_MCOIRKOMV INTO WA_MCOIRKOMV.


*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.
ENDFORM. 

*&---------------------------------------------------------------------*
*& Form process_as_string_field_values
*&---------------------------------------------------------------------*
FORM process_as_string_field_values CHANGING p_EKKO LIKE wa_EKKO.

TYPES: BEGIN OF T_MCOIRKOMV_STR, 
OIRTOTGR TYPE STRING,
OIRPYTCDGR TYPE STRING,
OIRPFEENET TYPE STRING,
OIRPFEEVAT TYPE STRING,
OIRFLFUGR TYPE STRING,
OIRCOMMNET TYPE STRING,
OIRCOMMVAT TYPE STRING,
OIRFUGR TYPE STRING,
OIRFUNET TYPE STRING,
OIRFUVAT TYPE STRING,
OIRDOPGR TYPE STRING,
OIRDOPVAT TYPE STRING,
OIRREDUCT TYPE STRING,
OIRPURPR TYPE STRING,
OIREBV TYPE STRING,
OIRFREIGHT TYPE STRING,
OIRCHFEES TYPE STRING,
OIRFCFEES TYPE STRING,END OF T_EKKO_STR.
DATA: WA_MCOIRKOMV_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_MCOIRKOMV_STR-OIRTOTGR sy-vline 
WA_MCOIRKOMV_STR-OIRPYTCDGR sy-vline 
WA_MCOIRKOMV_STR-OIRPFEENET sy-vline 
WA_MCOIRKOMV_STR-OIRPFEEVAT sy-vline 
WA_MCOIRKOMV_STR-OIRFLFUGR sy-vline 
WA_MCOIRKOMV_STR-OIRCOMMNET sy-vline 
WA_MCOIRKOMV_STR-OIRCOMMVAT sy-vline 
WA_MCOIRKOMV_STR-OIRFUGR sy-vline 
WA_MCOIRKOMV_STR-OIRFUNET sy-vline 
WA_MCOIRKOMV_STR-OIRFUVAT sy-vline 
WA_MCOIRKOMV_STR-OIRDOPGR sy-vline 
WA_MCOIRKOMV_STR-OIRDOPVAT sy-vline 
WA_MCOIRKOMV_STR-OIRREDUCT sy-vline 
WA_MCOIRKOMV_STR-OIRPURPR sy-vline 
WA_MCOIRKOMV_STR-OIREBV sy-vline 
WA_MCOIRKOMV_STR-OIRFREIGHT sy-vline 
WA_MCOIRKOMV_STR-OIRCHFEES sy-vline 
WA_MCOIRKOMV_STR-OIRFCFEES sy-vline      INTO ld_text SEPARATED BY SPACE.

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