ABAP Select data from SAP table MSCD_MD into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM MSCD_MD
*  INTO TABLE @DATA(IT_MSCD_MD2).
*--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_MSCD_MD INDEX 1 INTO DATA(WA_MSCD_MD2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<MSCD_MD>-MANDT = 1.
<MSCD_MD>-MATNR = 1.
<MSCD_MD>-WERKS = 1.
<MSCD_MD>-CHARG = 1.
<MSCD_MD>-SOBKZ = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_MSCD_MD-LIFNR, sy-vline,
  WA_MSCD_MD-KUNNR, sy-vline,
  WA_MSCD_MD-LFGJA, sy-vline,
  WA_MSCD_MD-LFMON, sy-vline,
  WA_MSCD_MD-CDSPR, sy-vline,
  WA_MSCD_MD-CDILL, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_MSCD_MD 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_MSCD_MD 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_MSCD_MD INTO WA_MSCD_MD.


*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 MATN1, internal->external for field MATNR
CALL FUNCTION 'CONVERSION_EXIT_MATN1_OUTPUT'
  EXPORTING
    input =                      WA_MSCD_MD-MATNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MSCD_MD-MATNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field LIFNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_MSCD_MD-LIFNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MSCD_MD-LIFNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field KUNNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_MSCD_MD-KUNNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MSCD_MD-KUNNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit GJAHR, internal->external for field LFGJA
CALL FUNCTION 'CONVERSION_EXIT_GJAHR_OUTPUT'
  EXPORTING
    input =                      WA_MSCD_MD-LFGJA
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MSCD_MD-LFGJA.
WRITE:/ 'New Value:', ld_input.

*Conversion exit GJAHR, internal->external for field CDJIN
CALL FUNCTION 'CONVERSION_EXIT_GJAHR_OUTPUT'
  EXPORTING
    input =                      WA_MSCD_MD-CDJIN
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MSCD_MD-CDJIN.
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_MSCD_MD_STR, 
MANDT TYPE STRING,
MATNR TYPE STRING,
WERKS TYPE STRING,
CHARG TYPE STRING,
SOBKZ TYPE STRING,
LIFNR TYPE STRING,
KUNNR TYPE STRING,
LFGJA TYPE STRING,
LFMON TYPE STRING,
CDSPR TYPE STRING,
CDILL TYPE STRING,
CDILQ TYPE STRING,
CDVLL TYPE STRING,
CDVLQ TYPE STRING,
CDFLL TYPE STRING,
CDFLQ TYPE STRING,
CDDLL TYPE STRING,
ERSDA TYPE STRING,
CDJIN TYPE STRING,END OF T_EKKO_STR.
DATA: WA_MSCD_MD_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_MSCD_MD_STR-MANDT sy-vline 
WA_MSCD_MD_STR-MATNR sy-vline 
WA_MSCD_MD_STR-WERKS sy-vline 
WA_MSCD_MD_STR-CHARG sy-vline 
WA_MSCD_MD_STR-SOBKZ sy-vline 
WA_MSCD_MD_STR-LIFNR sy-vline 
WA_MSCD_MD_STR-KUNNR sy-vline 
WA_MSCD_MD_STR-LFGJA sy-vline 
WA_MSCD_MD_STR-LFMON sy-vline 
WA_MSCD_MD_STR-CDSPR sy-vline 
WA_MSCD_MD_STR-CDILL sy-vline 
WA_MSCD_MD_STR-CDILQ sy-vline 
WA_MSCD_MD_STR-CDVLL sy-vline 
WA_MSCD_MD_STR-CDVLQ sy-vline 
WA_MSCD_MD_STR-CDFLL sy-vline 
WA_MSCD_MD_STR-CDFLQ sy-vline 
WA_MSCD_MD_STR-CDDLL sy-vline 
WA_MSCD_MD_STR-ERSDA sy-vline 
WA_MSCD_MD_STR-CDJIN sy-vline      INTO ld_text SEPARATED BY SPACE.

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