ABAP Select data from SAP table MMPUR_MPS_ITEM_DATA into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM MMPUR_MPS_ITEM_DATA
*  INTO TABLE @DATA(IT_MMPUR_MPS_ITEM_DATA2).
*--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_MMPUR_MPS_ITEM_DATA INDEX 1 INTO DATA(WA_MMPUR_MPS_ITEM_DATA2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<MMPUR_MPS_ITEM_DATA>-MODELPRODUCTSPECIFICATIONUUID = 1.
<MMPUR_MPS_ITEM_DATA>-MODELPRODUCTSPECIFICATION = 1.
<MMPUR_MPS_ITEM_DATA>-MODELPRODUCTSPECIFICATIONITEM = 1.
<MMPUR_MPS_ITEM_DATA>-MODPRODSPECALTERNATIVEITEMID = 1.
<MMPUR_MPS_ITEM_DATA>-MODPRODSPECFORMATTEDITEMID = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_MMPUR_MPS_ITEM_DATA-PLANT, sy-vline,
  WA_MMPUR_MPS_ITEM_DATA-MODPRODSPECITEMPARENTID, sy-vline,
  WA_MMPUR_MPS_ITEM_DATA-MODPRODSPECGROUPINGCODE, sy-vline,
  WA_MMPUR_MPS_ITEM_DATA-PURCHASINGISITEMSET, sy-vline,
  WA_MMPUR_MPS_ITEM_DATA-PURCHASINGDOCUMENTITEMCATEGORY, sy-vline,
  WA_MMPUR_MPS_ITEM_DATA-MODPRODSPECITEMDESCRIPTION, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_MMPUR_MPS_ITEM_DATA 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_MMPUR_MPS_ITEM_DATA 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_MMPUR_MPS_ITEM_DATA INTO WA_MMPUR_MPS_ITEM_DATA.


*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 PRODUCT
CALL FUNCTION 'CONVERSION_EXIT_MATN1_OUTPUT'
  EXPORTING
    input =                      WA_MMPUR_MPS_ITEM_DATA-PRODUCT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MMPUR_MPS_ITEM_DATA-PRODUCT.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field ORDERQUANTITYUNIT
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_MMPUR_MPS_ITEM_DATA-ORDERQUANTITYUNIT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MMPUR_MPS_ITEM_DATA-ORDERQUANTITYUNIT.
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_MMPUR_MPS_ITEM_DATA_STR, 
MODELPRODUCTSPECIFICATIONUUID TYPE STRING,
MODELPRODUCTSPECIFICATION TYPE STRING,
MODELPRODUCTSPECIFICATIONITEM TYPE STRING,
MODPRODSPECALTERNATIVEITEMID TYPE STRING,
MODPRODSPECFORMATTEDITEMID TYPE STRING,
PLANT TYPE STRING,
MODPRODSPECITEMPARENTID TYPE STRING,
MODPRODSPECGROUPINGCODE TYPE STRING,
PURCHASINGISITEMSET TYPE STRING,
PURCHASINGDOCUMENTITEMCATEGORY TYPE STRING,
MODPRODSPECITEMDESCRIPTION TYPE STRING,
PRODUCT TYPE STRING,
PRODUCTTYPECODE TYPE STRING,
MATERIALGROUP TYPE STRING,
ORDERQUANTITY TYPE STRING,
ORDERQUANTITYUNIT TYPE STRING,
CREATIONDATETIME TYPE STRING,
CREATEDBYUSER TYPE STRING,
LASTCHANGEDATETIME TYPE STRING,
LASTCHANGEDBYUSER TYPE STRING,END OF T_EKKO_STR.
DATA: WA_MMPUR_MPS_ITEM_DATA_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_MMPUR_MPS_ITEM_DATA_STR-MODELPRODUCTSPECIFICATIONUUID sy-vline 
WA_MMPUR_MPS_ITEM_DATA_STR-MODELPRODUCTSPECIFICATION sy-vline 
WA_MMPUR_MPS_ITEM_DATA_STR-MODELPRODUCTSPECIFICATIONITEM sy-vline 
WA_MMPUR_MPS_ITEM_DATA_STR-MODPRODSPECALTERNATIVEITEMID sy-vline 
WA_MMPUR_MPS_ITEM_DATA_STR-MODPRODSPECFORMATTEDITEMID sy-vline 
WA_MMPUR_MPS_ITEM_DATA_STR-PLANT sy-vline 
WA_MMPUR_MPS_ITEM_DATA_STR-MODPRODSPECITEMPARENTID sy-vline 
WA_MMPUR_MPS_ITEM_DATA_STR-MODPRODSPECGROUPINGCODE sy-vline 
WA_MMPUR_MPS_ITEM_DATA_STR-PURCHASINGISITEMSET sy-vline 
WA_MMPUR_MPS_ITEM_DATA_STR-PURCHASINGDOCUMENTITEMCATEGORY sy-vline 
WA_MMPUR_MPS_ITEM_DATA_STR-MODPRODSPECITEMDESCRIPTION sy-vline 
WA_MMPUR_MPS_ITEM_DATA_STR-PRODUCT sy-vline 
WA_MMPUR_MPS_ITEM_DATA_STR-PRODUCTTYPECODE sy-vline 
WA_MMPUR_MPS_ITEM_DATA_STR-MATERIALGROUP sy-vline 
WA_MMPUR_MPS_ITEM_DATA_STR-ORDERQUANTITY sy-vline 
WA_MMPUR_MPS_ITEM_DATA_STR-ORDERQUANTITYUNIT sy-vline 
WA_MMPUR_MPS_ITEM_DATA_STR-CREATIONDATETIME sy-vline 
WA_MMPUR_MPS_ITEM_DATA_STR-CREATEDBYUSER sy-vline 
WA_MMPUR_MPS_ITEM_DATA_STR-LASTCHANGEDATETIME sy-vline 
WA_MMPUR_MPS_ITEM_DATA_STR-LASTCHANGEDBYUSER sy-vline      INTO ld_text SEPARATED BY SPACE.

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