ABAP Select data from SAP table M_DEBIS into internal table

Get Example source ABAP code based on a different SAP table
  Get ABAP code

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM M_DEBIS
*  INTO TABLE @DATA(IT_M_DEBIS2).
*--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_M_DEBIS INDEX 1 INTO DATA(WA_M_DEBIS2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<M_DEBIS>-MANDT = 1.
<M_DEBIS>-VKORG = 1.
<M_DEBIS>-SORTL = 1.
<M_DEBIS>-LAND1 = 1.
<M_DEBIS>-PSTLZ = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_M_DEBIS-MCOD3, sy-vline,
  WA_M_DEBIS-MCOD1, sy-vline,
  WA_M_DEBIS-KUNNR, sy-vline,
  WA_M_DEBIS-VTWEG, sy-vline,
  WA_M_DEBIS-SPART, sy-vline,
  WA_M_DEBIS-VKBUR, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_M_DEBIS 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_M_DEBIS 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_M_DEBIS INTO WA_M_DEBIS.


*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 KUNNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_M_DEBIS-KUNNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_M_DEBIS-KUNNR.
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_M_DEBIS_STR, 
MANDT TYPE STRING,
VKORG TYPE STRING,
SORTL TYPE STRING,
LAND1 TYPE STRING,
PSTLZ TYPE STRING,
MCOD3 TYPE STRING,
MCOD1 TYPE STRING,
KUNNR TYPE STRING,
VTWEG TYPE STRING,
SPART TYPE STRING,
VKBUR TYPE STRING,
VKGRP TYPE STRING,
BEGRU TYPE STRING,
KTOKD TYPE STRING,END OF T_EKKO_STR.
DATA: WA_M_DEBIS_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_M_DEBIS_STR-MANDT sy-vline 
WA_M_DEBIS_STR-VKORG sy-vline 
WA_M_DEBIS_STR-SORTL sy-vline 
WA_M_DEBIS_STR-LAND1 sy-vline 
WA_M_DEBIS_STR-PSTLZ sy-vline 
WA_M_DEBIS_STR-MCOD3 sy-vline 
WA_M_DEBIS_STR-MCOD1 sy-vline 
WA_M_DEBIS_STR-KUNNR sy-vline 
WA_M_DEBIS_STR-VTWEG sy-vline 
WA_M_DEBIS_STR-SPART sy-vline 
WA_M_DEBIS_STR-VKBUR sy-vline 
WA_M_DEBIS_STR-VKGRP sy-vline 
WA_M_DEBIS_STR-BEGRU sy-vline 
WA_M_DEBIS_STR-KTOKD sy-vline      INTO ld_text SEPARATED BY SPACE.

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