ABAP Select data from SAP table MMPUR_S_CTR_ITM 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_CTR_ITM 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_CTR_ITM. 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_CTR_ITM 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_CTR_ITM TYPE STANDARD TABLE OF MMPUR_S_CTR_ITM,
      WA_MMPUR_S_CTR_ITM TYPE MMPUR_S_CTR_ITM,
      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_CTR_ITM> TYPE MMPUR_S_CTR_ITM.

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM MMPUR_S_CTR_ITM
*  INTO TABLE @DATA(IT_MMPUR_S_CTR_ITM2).
*--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_CTR_ITM INDEX 1 INTO DATA(WA_MMPUR_S_CTR_ITM2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<MMPUR_S_CTR_ITM>-PLANT = 1.
<MMPUR_S_CTR_ITM>-REFERENCEDELIVERYADDRESSID = 1.
<MMPUR_S_CTR_ITM>-MANUALDELIVERYADDRESSID = 1.
<MMPUR_S_CTR_ITM>-PURCHASINGDOCUMENTITEMCATEGORY = 1.
<MMPUR_S_CTR_ITM>-MATERIALGROUP = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_MMPUR_S_CTR_ITM-PURCHASINGDOCUMENTDELETIONCODE, sy-vline,
  WA_MMPUR_S_CTR_ITM-PURCHASECONTRACTITEM, sy-vline,
  WA_MMPUR_S_CTR_ITM-ACCOUNTASSIGNMENTCATEGORY, sy-vline,
  WA_MMPUR_S_CTR_ITM-STORAGELOCATION, sy-vline,
  WA_MMPUR_S_CTR_ITM-GOODSRECEIPTISEXPECTED, sy-vline,
  WA_MMPUR_S_CTR_ITM-GOODSRECEIPTISNONVALUATED, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_MMPUR_S_CTR_ITM 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_CTR_ITM 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_CTR_ITM INTO WA_MMPUR_S_CTR_ITM.


*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 REFERENCEDELIVERYADDRESSID
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_MMPUR_S_CTR_ITM-REFERENCEDELIVERYADDRESSID
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MMPUR_S_CTR_ITM-REFERENCEDELIVERYADDRESSID.
WRITE:/ 'New Value:', ld_input.

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

*Conversion exit MATN1, internal->external for field MATERIAL
CALL FUNCTION 'CONVERSION_EXIT_MATN1_OUTPUT'
  EXPORTING
    input =                      WA_MMPUR_S_CTR_ITM-MATERIAL
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MMPUR_S_CTR_ITM-MATERIAL.
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_CTR_ITM_STR, 
PLANT TYPE STRING,
REFERENCEDELIVERYADDRESSID TYPE STRING,
MANUALDELIVERYADDRESSID TYPE STRING,
PURCHASINGDOCUMENTITEMCATEGORY TYPE STRING,
MATERIALGROUP TYPE STRING,
PURCHASINGDOCUMENTDELETIONCODE TYPE STRING,
PURCHASECONTRACTITEM TYPE STRING,
ACCOUNTASSIGNMENTCATEGORY TYPE STRING,
STORAGELOCATION TYPE STRING,
GOODSRECEIPTISEXPECTED TYPE STRING,
GOODSRECEIPTISNONVALUATED TYPE STRING,
INVOICEISEXPECTED TYPE STRING,
INVOICEISGOODSRECEIPTBASED TYPE STRING,
MATERIAL TYPE STRING,
DUMMY_EKPO_INCL_EEW_PS TYPE STRING,END OF T_EKKO_STR.
DATA: WA_MMPUR_S_CTR_ITM_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_CTR_ITM_STR-PLANT sy-vline 
WA_MMPUR_S_CTR_ITM_STR-REFERENCEDELIVERYADDRESSID sy-vline 
WA_MMPUR_S_CTR_ITM_STR-MANUALDELIVERYADDRESSID sy-vline 
WA_MMPUR_S_CTR_ITM_STR-PURCHASINGDOCUMENTITEMCATEGORY sy-vline 
WA_MMPUR_S_CTR_ITM_STR-MATERIALGROUP sy-vline 
WA_MMPUR_S_CTR_ITM_STR-PURCHASINGDOCUMENTDELETIONCODE sy-vline 
WA_MMPUR_S_CTR_ITM_STR-PURCHASECONTRACTITEM sy-vline 
WA_MMPUR_S_CTR_ITM_STR-ACCOUNTASSIGNMENTCATEGORY sy-vline 
WA_MMPUR_S_CTR_ITM_STR-STORAGELOCATION sy-vline 
WA_MMPUR_S_CTR_ITM_STR-GOODSRECEIPTISEXPECTED sy-vline 
WA_MMPUR_S_CTR_ITM_STR-GOODSRECEIPTISNONVALUATED sy-vline 
WA_MMPUR_S_CTR_ITM_STR-INVOICEISEXPECTED sy-vline 
WA_MMPUR_S_CTR_ITM_STR-INVOICEISGOODSRECEIPTBASED sy-vline 
WA_MMPUR_S_CTR_ITM_STR-MATERIAL sy-vline 
WA_MMPUR_S_CTR_ITM_STR-DUMMY_EKPO_INCL_EEW_PS sy-vline      INTO ld_text SEPARATED BY SPACE.

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