ABAP Select data from SAP table MMIV_S_IC_ITEM into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM MMIV_S_IC_ITEM
*  INTO TABLE @DATA(IT_MMIV_S_IC_ITEM2).
*--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_MMIV_S_IC_ITEM INDEX 1 INTO DATA(WA_MMIV_S_IC_ITEM2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<MMIV_S_IC_ITEM>-SUPPLIERINVOICEITEM = 1.
<MMIV_S_IC_ITEM>-ISCREDITMEMOITEM = 1.
<MMIV_S_IC_ITEM>-NETAMOUNT = 1.
<MMIV_S_IC_ITEM>-QUANTITYINPURCHASEORDERUNIT = 1.
<MMIV_S_IC_ITEM>-PURCHASEORDERQUANTITYUNIT = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_MMIV_S_IC_ITEM-PURCHASEORDERQUANTITYUNIT_SAP, sy-vline,
  WA_MMIV_S_IC_ITEM-PURCHASEORDER, sy-vline,
  WA_MMIV_S_IC_ITEM-PURCHASEORDERITEM, sy-vline,
  WA_MMIV_S_IC_ITEM-DELIVERYNOTE, sy-vline,
  WA_MMIV_S_IC_ITEM-DELIVERYNOTEITEM, sy-vline,
  WA_MMIV_S_IC_ITEM-SUPPLIERMATERIALNUMBER, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_MMIV_S_IC_ITEM 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_MMIV_S_IC_ITEM 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_MMIV_S_IC_ITEM INTO WA_MMIV_S_IC_ITEM.


*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 PURCHASEORDERQUANTITYUNIT
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_MMIV_S_IC_ITEM-PURCHASEORDERQUANTITYUNIT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MMIV_S_IC_ITEM-PURCHASEORDERQUANTITYUNIT.
WRITE:/ 'New Value:', ld_input.

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

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

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

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

*Conversion exit GJAHR, internal->external for field REFERENCEDOCUMENTFISCALYEAR
CALL FUNCTION 'CONVERSION_EXIT_GJAHR_OUTPUT'
  EXPORTING
    input =                      WA_MMIV_S_IC_ITEM-REFERENCEDOCUMENTFISCALYEAR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MMIV_S_IC_ITEM-REFERENCEDOCUMENTFISCALYEAR.
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_MMIV_S_IC_ITEM_STR, 
SUPPLIERINVOICEITEM TYPE STRING,
ISCREDITMEMOITEM TYPE STRING,
NETAMOUNT TYPE STRING,
QUANTITYINPURCHASEORDERUNIT TYPE STRING,
PURCHASEORDERQUANTITYUNIT TYPE STRING,
PURCHASEORDERQUANTITYUNIT_SAP TYPE STRING,
PURCHASEORDER TYPE STRING,
PURCHASEORDERITEM TYPE STRING,
DELIVERYNOTE TYPE STRING,
DELIVERYNOTEITEM TYPE STRING,
SUPPLIERMATERIALNUMBER TYPE STRING,
SUPPLIERMATERIALNUMBER_SAP TYPE STRING,
PURCHASEORDERITEMMATERIAL TYPE STRING,
SERVICESRENDEREDDATE TYPE STRING,
TAXES TYPE STRING,
VCM_CHAIN_CATEGORY TYPE STRING,
VCM_CHAIN_UUID TYPE STRING,
REFERENCEDOCUMENT TYPE STRING,
REFERENCEDOCUMENTFISCALYEAR TYPE STRING,
REFERENCEDOCUMENTITEM TYPE STRING,END OF T_EKKO_STR.
DATA: WA_MMIV_S_IC_ITEM_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_MMIV_S_IC_ITEM_STR-SUPPLIERINVOICEITEM sy-vline 
WA_MMIV_S_IC_ITEM_STR-ISCREDITMEMOITEM sy-vline 
WA_MMIV_S_IC_ITEM_STR-NETAMOUNT sy-vline 
WA_MMIV_S_IC_ITEM_STR-QUANTITYINPURCHASEORDERUNIT sy-vline 
WA_MMIV_S_IC_ITEM_STR-PURCHASEORDERQUANTITYUNIT sy-vline 
WA_MMIV_S_IC_ITEM_STR-PURCHASEORDERQUANTITYUNIT_SAP sy-vline 
WA_MMIV_S_IC_ITEM_STR-PURCHASEORDER sy-vline 
WA_MMIV_S_IC_ITEM_STR-PURCHASEORDERITEM sy-vline 
WA_MMIV_S_IC_ITEM_STR-DELIVERYNOTE sy-vline 
WA_MMIV_S_IC_ITEM_STR-DELIVERYNOTEITEM sy-vline 
WA_MMIV_S_IC_ITEM_STR-SUPPLIERMATERIALNUMBER sy-vline 
WA_MMIV_S_IC_ITEM_STR-SUPPLIERMATERIALNUMBER_SAP sy-vline 
WA_MMIV_S_IC_ITEM_STR-PURCHASEORDERITEMMATERIAL sy-vline 
WA_MMIV_S_IC_ITEM_STR-SERVICESRENDEREDDATE sy-vline 
WA_MMIV_S_IC_ITEM_STR-TAXES sy-vline 
WA_MMIV_S_IC_ITEM_STR-VCM_CHAIN_CATEGORY sy-vline 
WA_MMIV_S_IC_ITEM_STR-VCM_CHAIN_UUID sy-vline 
WA_MMIV_S_IC_ITEM_STR-REFERENCEDOCUMENT sy-vline 
WA_MMIV_S_IC_ITEM_STR-REFERENCEDOCUMENTFISCALYEAR sy-vline 
WA_MMIV_S_IC_ITEM_STR-REFERENCEDOCUMENTITEM sy-vline      INTO ld_text SEPARATED BY SPACE.

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