ABAP Select data from SAP table MMPUR_S_ML_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_S_ML_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_S_ML_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_S_ML_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_S_ML_ITEM_DATA TYPE STANDARD TABLE OF MMPUR_S_ML_ITEM_DATA,
      WA_MMPUR_S_ML_ITEM_DATA TYPE MMPUR_S_ML_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_S_ML_ITEM_DATA> TYPE MMPUR_S_ML_ITEM_DATA.

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM MMPUR_S_ML_ITEM_DATA
*  INTO TABLE @DATA(IT_MMPUR_S_ML_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_S_ML_ITEM_DATA INDEX 1 INTO DATA(WA_MMPUR_S_ML_ITEM_DATA2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<MMPUR_S_ML_ITEM_DATA>-UNITOFMEASURE = 1.
<MMPUR_S_ML_ITEM_DATA>-THRESHOLD = 1.
<MMPUR_S_ML_ITEM_DATA>-SUPPLIER_COUNT_THRESHOLD = 1.
<MMPUR_S_ML_ITEM_DATA>-PERIOD_IN_DAYS = 1.
<MMPUR_S_ML_ITEM_DATA>-EBELN = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_MMPUR_S_ML_ITEM_DATA-EBELP, sy-vline,
  WA_MMPUR_S_ML_ITEM_DATA-TXZ01, sy-vline,
  WA_MMPUR_S_ML_ITEM_DATA-SPRAS, sy-vline,
  WA_MMPUR_S_ML_ITEM_DATA-DATE, sy-vline,
  WA_MMPUR_S_ML_ITEM_DATA-MATKL, sy-vline,
  WA_MMPUR_S_ML_ITEM_DATA-MEINS, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_MMPUR_S_ML_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_S_ML_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_S_ML_ITEM_DATA INTO WA_MMPUR_S_ML_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 CUNIT, internal->external for field UNITOFMEASURE
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_MMPUR_S_ML_ITEM_DATA-UNITOFMEASURE
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MMPUR_S_ML_ITEM_DATA-UNITOFMEASURE.
WRITE:/ 'New Value:', ld_input.

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

*Conversion exit ISOLA, internal->external for field SPRAS
CALL FUNCTION 'CONVERSION_EXIT_ISOLA_OUTPUT'
  EXPORTING
    input =                      WA_MMPUR_S_ML_ITEM_DATA-SPRAS
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MMPUR_S_ML_ITEM_DATA-SPRAS.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field MEINS
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_MMPUR_S_ML_ITEM_DATA-MEINS
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MMPUR_S_ML_ITEM_DATA-MEINS.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field BPRME
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_MMPUR_S_ML_ITEM_DATA-BPRME
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MMPUR_S_ML_ITEM_DATA-BPRME.
WRITE:/ 'New Value:', ld_input.

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

*Conversion exit ALPHA, internal->external for field PR_ID
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_MMPUR_S_ML_ITEM_DATA-PR_ID
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MMPUR_S_ML_ITEM_DATA-PR_ID.
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_S_ML_ITEM_DATA_STR, 
UNITOFMEASURE TYPE STRING,
THRESHOLD TYPE STRING,
SUPPLIER_COUNT_THRESHOLD TYPE STRING,
PERIOD_IN_DAYS TYPE STRING,
EBELN TYPE STRING,
EBELP TYPE STRING,
TXZ01 TYPE STRING,
SPRAS TYPE STRING,
DATE TYPE STRING,
MATKL TYPE STRING,
MEINS TYPE STRING,
NETPR TYPE STRING,
WAERS TYPE STRING,
NETPR_IN_USD TYPE STRING,
BPRME TYPE STRING,
PEINH TYPE STRING,
PLIFZ TYPE STRING,
IDNLF TYPE STRING,
LIFNR TYPE STRING,
CUSTOMER_ID TYPE STRING,
PR_ID TYPE STRING,
PR_ITEM_NO TYPE STRING,END OF T_EKKO_STR.
DATA: WA_MMPUR_S_ML_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_S_ML_ITEM_DATA_STR-UNITOFMEASURE sy-vline 
WA_MMPUR_S_ML_ITEM_DATA_STR-THRESHOLD sy-vline 
WA_MMPUR_S_ML_ITEM_DATA_STR-SUPPLIER_COUNT_THRESHOLD sy-vline 
WA_MMPUR_S_ML_ITEM_DATA_STR-PERIOD_IN_DAYS sy-vline 
WA_MMPUR_S_ML_ITEM_DATA_STR-EBELN sy-vline 
WA_MMPUR_S_ML_ITEM_DATA_STR-EBELP sy-vline 
WA_MMPUR_S_ML_ITEM_DATA_STR-TXZ01 sy-vline 
WA_MMPUR_S_ML_ITEM_DATA_STR-SPRAS sy-vline 
WA_MMPUR_S_ML_ITEM_DATA_STR-DATE sy-vline 
WA_MMPUR_S_ML_ITEM_DATA_STR-MATKL sy-vline 
WA_MMPUR_S_ML_ITEM_DATA_STR-MEINS sy-vline 
WA_MMPUR_S_ML_ITEM_DATA_STR-NETPR sy-vline 
WA_MMPUR_S_ML_ITEM_DATA_STR-WAERS sy-vline 
WA_MMPUR_S_ML_ITEM_DATA_STR-NETPR_IN_USD sy-vline 
WA_MMPUR_S_ML_ITEM_DATA_STR-BPRME sy-vline 
WA_MMPUR_S_ML_ITEM_DATA_STR-PEINH sy-vline 
WA_MMPUR_S_ML_ITEM_DATA_STR-PLIFZ sy-vline 
WA_MMPUR_S_ML_ITEM_DATA_STR-IDNLF sy-vline 
WA_MMPUR_S_ML_ITEM_DATA_STR-LIFNR sy-vline 
WA_MMPUR_S_ML_ITEM_DATA_STR-CUSTOMER_ID sy-vline 
WA_MMPUR_S_ML_ITEM_DATA_STR-PR_ID sy-vline 
WA_MMPUR_S_ML_ITEM_DATA_STR-PR_ITEM_NO sy-vline      INTO ld_text SEPARATED BY SPACE.

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