ABAP Select data from SAP table MDCP 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 MDCP 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 MDCP. 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 MDCP 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_MDCP TYPE STANDARD TABLE OF MDCP,
      WA_MDCP TYPE MDCP,
      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: <MDCP> TYPE MDCP.

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM MDCP
*  INTO TABLE @DATA(IT_MDCP2).
*--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_MDCP INDEX 1 INTO DATA(WA_MDCP2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<MDCP>-MATNR = 1.
<MDCP>-WERKS = 1.
<MDCP>-DISST = 1.
<MDCP>-DISMM = 1.
<MDCP>-MISKZ = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_MDCP-MTART, sy-vline,
  WA_MDCP-OBJKT, sy-vline,
  WA_MDCP-FUNKT, sy-vline,
  WA_MDCP-MATKZ, sy-vline,
  WA_MDCP-PSTAT, sy-vline,
  WA_MDCP-MINBE, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_MDCP 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_MDCP 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_MDCP INTO WA_MDCP.


*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_MDCP-MATNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MDCP-MATNR.
WRITE:/ 'New Value:', ld_input.

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

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

*Conversion exit NUMCV, internal->external for field STLNR
CALL FUNCTION 'CONVERSION_EXIT_NUMCV_OUTPUT'
  EXPORTING
    input =                      WA_MDCP-STLNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MDCP-STLNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field STLAL
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_MDCP-STLAL
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MDCP-STLAL.
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_MDCP_STR, 
MATNR TYPE STRING,
WERKS TYPE STRING,
DISST TYPE STRING,
DISMM TYPE STRING,
MISKZ TYPE STRING,
MTART TYPE STRING,
OBJKT TYPE STRING,
FUNKT TYPE STRING,
MATKZ TYPE STRING,
PSTAT TYPE STRING,
MINBE TYPE STRING,
EISBE TYPE STRING,
KZBEW TYPE STRING,
ELIKZ TYPE STRING,
KZEAR TYPE STRING,
RSNUM TYPE STRING,
URMNG TYPE STRING,
BEMNG TYPE STRING,
GEMNG TYPE STRING,
SHKZG TYPE STRING,
GSAEN TYPE STRING,
AKKEN TYPE STRING,
RESDT TYPE STRING,
RESAL TYPE STRING,
RHYTD TYPE STRING,
PLTRM TYPE STRING,
MMSTA TYPE STRING,
DISKZ TYPE STRING,
BDART TYPE STRING,
BDTER TYPE STRING,
DUMPS TYPE STRING,
RSHKZ TYPE STRING,
XSTBW TYPE STRING,
SOBKZ TYPE STRING,
SOBSL TYPE STRING,
LGORT TYPE STRING,
OPUFF TYPE STRING,
ALTSB TYPE STRING,
KNTKZ TYPE STRING,
MRPPP TYPE STRING,
ALTPP TYPE STRING,
KNNUM TYPE STRING,
KLART TYPE STRING,
CLASS TYPE STRING,
MTKFM TYPE STRING,
NEWDS TYPE STRING,
ALTDI TYPE STRING,
PLSCN TYPE STRING,
KZAUS TYPE STRING,
ALTAL TYPE STRING,
NOUPD TYPE STRING,
NOINS TYPE STRING,
BERID TYPE STRING,
BERTY TYPE STRING,
LBEAR TYPE STRING,
VMDBE TYPE STRING,
KDAUF TYPE STRING,
KDPOS TYPE STRING,
LOEKZ TYPE STRING,
DIBER TYPE STRING,
DBSKZ TYPE STRING,
VRPLA TYPE STRING,
NOBUF TYPE STRING,
LFRHY TYPE STRING,
DISGR TYPE STRING,
PPSKZ TYPE STRING,
STLNR TYPE STRING,
STLTY TYPE STRING,
STLAL TYPE STRING,
STLKN TYPE STRING,END OF T_EKKO_STR.
DATA: WA_MDCP_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_MDCP_STR-MATNR sy-vline 
WA_MDCP_STR-WERKS sy-vline 
WA_MDCP_STR-DISST sy-vline 
WA_MDCP_STR-DISMM sy-vline 
WA_MDCP_STR-MISKZ sy-vline 
WA_MDCP_STR-MTART sy-vline 
WA_MDCP_STR-OBJKT sy-vline 
WA_MDCP_STR-FUNKT sy-vline 
WA_MDCP_STR-MATKZ sy-vline 
WA_MDCP_STR-PSTAT sy-vline 
WA_MDCP_STR-MINBE sy-vline 
WA_MDCP_STR-EISBE sy-vline 
WA_MDCP_STR-KZBEW sy-vline 
WA_MDCP_STR-ELIKZ sy-vline 
WA_MDCP_STR-KZEAR sy-vline 
WA_MDCP_STR-RSNUM sy-vline 
WA_MDCP_STR-URMNG sy-vline 
WA_MDCP_STR-BEMNG sy-vline 
WA_MDCP_STR-GEMNG sy-vline 
WA_MDCP_STR-SHKZG sy-vline 
WA_MDCP_STR-GSAEN sy-vline 
WA_MDCP_STR-AKKEN sy-vline 
WA_MDCP_STR-RESDT sy-vline 
WA_MDCP_STR-RESAL sy-vline 
WA_MDCP_STR-RHYTD sy-vline 
WA_MDCP_STR-PLTRM sy-vline 
WA_MDCP_STR-MMSTA sy-vline 
WA_MDCP_STR-DISKZ sy-vline 
WA_MDCP_STR-BDART sy-vline 
WA_MDCP_STR-BDTER sy-vline 
WA_MDCP_STR-DUMPS sy-vline 
WA_MDCP_STR-RSHKZ sy-vline 
WA_MDCP_STR-XSTBW sy-vline 
WA_MDCP_STR-SOBKZ sy-vline 
WA_MDCP_STR-SOBSL sy-vline 
WA_MDCP_STR-LGORT sy-vline 
WA_MDCP_STR-OPUFF sy-vline 
WA_MDCP_STR-ALTSB sy-vline 
WA_MDCP_STR-KNTKZ sy-vline 
WA_MDCP_STR-MRPPP sy-vline 
WA_MDCP_STR-ALTPP sy-vline 
WA_MDCP_STR-KNNUM sy-vline 
WA_MDCP_STR-KLART sy-vline 
WA_MDCP_STR-CLASS sy-vline 
WA_MDCP_STR-MTKFM sy-vline 
WA_MDCP_STR-NEWDS sy-vline 
WA_MDCP_STR-ALTDI sy-vline 
WA_MDCP_STR-PLSCN sy-vline 
WA_MDCP_STR-KZAUS sy-vline 
WA_MDCP_STR-ALTAL sy-vline 
WA_MDCP_STR-NOUPD sy-vline 
WA_MDCP_STR-NOINS sy-vline 
WA_MDCP_STR-BERID sy-vline 
WA_MDCP_STR-BERTY sy-vline 
WA_MDCP_STR-LBEAR sy-vline 
WA_MDCP_STR-VMDBE sy-vline 
WA_MDCP_STR-KDAUF sy-vline 
WA_MDCP_STR-KDPOS sy-vline 
WA_MDCP_STR-LOEKZ sy-vline 
WA_MDCP_STR-DIBER sy-vline 
WA_MDCP_STR-DBSKZ sy-vline 
WA_MDCP_STR-VRPLA sy-vline 
WA_MDCP_STR-NOBUF sy-vline 
WA_MDCP_STR-LFRHY sy-vline 
WA_MDCP_STR-DISGR sy-vline 
WA_MDCP_STR-PPSKZ sy-vline 
WA_MDCP_STR-STLNR sy-vline 
WA_MDCP_STR-STLTY sy-vline 
WA_MDCP_STR-STLAL sy-vline 
WA_MDCP_STR-STLKN sy-vline      INTO ld_text SEPARATED BY SPACE.

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