ABAP Select data from SAP table COMPITMD into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM COMPITMD
*  INTO TABLE @DATA(IT_COMPITMD2).
*--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_COMPITMD INDEX 1 INTO DATA(WA_COMPITMD2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<COMPITMD>-MANDT = 1.
<COMPITMD>-COMPNUM = 1.
<COMPITMD>-COMPCNT = 1.
<COMPITMD>-AUFNR1 = 1.
<COMPITMD>-VSNMR1 = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_COMPITMD-POSNR1, sy-vline,
  WA_COMPITMD-AUFNR2, sy-vline,
  WA_COMPITMD-VSNMR2, sy-vline,
  WA_COMPITMD-POSNR2, sy-vline,
  WA_COMPITMD-RESULT, sy-vline,
  WA_COMPITMD-CONFTYP, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_COMPITMD 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_COMPITMD 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_COMPITMD INTO WA_COMPITMD.


*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 AUFNR1
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_COMPITMD-AUFNR1
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_COMPITMD-AUFNR1.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field AUFNR2
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_COMPITMD-AUFNR2
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_COMPITMD-AUFNR2.
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_COMPITMD_STR, 
MANDT TYPE STRING,
COMPNUM TYPE STRING,
COMPCNT TYPE STRING,
AUFNR1 TYPE STRING,
VSNMR1 TYPE STRING,
POSNR1 TYPE STRING,
AUFNR2 TYPE STRING,
VSNMR2 TYPE STRING,
POSNR2 TYPE STRING,
RESULT TYPE STRING,
CONFTYP TYPE STRING,
STATUS TYPE STRING,END OF T_EKKO_STR.
DATA: WA_COMPITMD_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_COMPITMD_STR-MANDT sy-vline 
WA_COMPITMD_STR-COMPNUM sy-vline 
WA_COMPITMD_STR-COMPCNT sy-vline 
WA_COMPITMD_STR-AUFNR1 sy-vline 
WA_COMPITMD_STR-VSNMR1 sy-vline 
WA_COMPITMD_STR-POSNR1 sy-vline 
WA_COMPITMD_STR-AUFNR2 sy-vline 
WA_COMPITMD_STR-VSNMR2 sy-vline 
WA_COMPITMD_STR-POSNR2 sy-vline 
WA_COMPITMD_STR-RESULT sy-vline 
WA_COMPITMD_STR-CONFTYP sy-vline 
WA_COMPITMD_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.