ABAP Select data from SAP table CDS_M_M2S_PD_I_C into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP CDS_M_M2S_PD_I_C 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 CDS_M_M2S_PD_I_C. 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 CDS_M_M2S_PD_I_C 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_CDS_M_M2S_PD_I_C TYPE STANDARD TABLE OF CDS_M_M2S_PD_I_C,
      WA_CDS_M_M2S_PD_I_C TYPE CDS_M_M2S_PD_I_C,
      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: <CDS_M_M2S_PD_I_C> TYPE CDS_M_M2S_PD_I_C.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_CDS_M_M2S_PD_I_C.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM CDS_M_M2S_PD_I_C
  INTO TABLE IT_CDS_M_M2S_PD_I_C.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM CDS_M_M2S_PD_I_C
*  INTO TABLE @DATA(IT_CDS_M_M2S_PD_I_C2).
*--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_CDS_M_M2S_PD_I_C INDEX 1 INTO DATA(WA_CDS_M_M2S_PD_I_C2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_CDS_M_M2S_PD_I_C ASSIGNING <CDS_M_M2S_PD_I_C>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<CDS_M_M2S_PD_I_C>-MANDT = 1.
<CDS_M_M2S_PD_I_C>-EBELN = 1.
<CDS_M_M2S_PD_I_C>-EBELP = 1.
<CDS_M_M2S_PD_I_C>-BSTYP = 1.
<CDS_M_M2S_PD_I_C>-STATUS = 1.

ENDLOOP.

LOOP AT IT_CDS_M_M2S_PD_I_C INTO WA_CDS_M_M2S_PD_I_C.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_CDS_M_M2S_PD_I_C-MENGE, sy-vline,
  WA_CDS_M_M2S_PD_I_C-WEMNG, sy-vline,
  WA_CDS_M_M2S_PD_I_C-NETWR, sy-vline,
  WA_CDS_M_M2S_PD_I_C-WEWRT, sy-vline,
  WA_CDS_M_M2S_PD_I_C-REMNG, sy-vline,
  WA_CDS_M_M2S_PD_I_C-REWRT, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_CDS_M_M2S_PD_I_C 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_CDS_M_M2S_PD_I_C 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_CDS_M_M2S_PD_I_C INTO WA_CDS_M_M2S_PD_I_C.


*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 EBELN
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_CDS_M_M2S_PD_I_C-EBELN
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_CDS_M_M2S_PD_I_C-EBELN.
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_CDS_M_M2S_PD_I_C_STR, 
MANDT TYPE STRING,
EBELN TYPE STRING,
EBELP TYPE STRING,
BSTYP TYPE STRING,
STATUS TYPE STRING,
MENGE TYPE STRING,
WEMNG TYPE STRING,
NETWR TYPE STRING,
WEWRT TYPE STRING,
REMNG TYPE STRING,
REWRT TYPE STRING,
WESBS TYPE STRING,
VALUEMISMATCH TYPE STRING,
QTYMISMATCH TYPE STRING,
CONFMISS TYPE STRING,END OF T_EKKO_STR.
DATA: WA_CDS_M_M2S_PD_I_C_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_CDS_M_M2S_PD_I_C_STR-MANDT sy-vline 
WA_CDS_M_M2S_PD_I_C_STR-EBELN sy-vline 
WA_CDS_M_M2S_PD_I_C_STR-EBELP sy-vline 
WA_CDS_M_M2S_PD_I_C_STR-BSTYP sy-vline 
WA_CDS_M_M2S_PD_I_C_STR-STATUS sy-vline 
WA_CDS_M_M2S_PD_I_C_STR-MENGE sy-vline 
WA_CDS_M_M2S_PD_I_C_STR-WEMNG sy-vline 
WA_CDS_M_M2S_PD_I_C_STR-NETWR sy-vline 
WA_CDS_M_M2S_PD_I_C_STR-WEWRT sy-vline 
WA_CDS_M_M2S_PD_I_C_STR-REMNG sy-vline 
WA_CDS_M_M2S_PD_I_C_STR-REWRT sy-vline 
WA_CDS_M_M2S_PD_I_C_STR-WESBS sy-vline 
WA_CDS_M_M2S_PD_I_C_STR-VALUEMISMATCH sy-vline 
WA_CDS_M_M2S_PD_I_C_STR-QTYMISMATCH sy-vline 
WA_CDS_M_M2S_PD_I_C_STR-CONFMISS sy-vline      INTO ld_text SEPARATED BY SPACE.

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