ABAP Select data from SAP table MMIV_SI_S_PO_HISTORY into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP MMIV_SI_S_PO_HISTORY 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_SI_S_PO_HISTORY. 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_SI_S_PO_HISTORY 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_SI_S_PO_HISTORY TYPE STANDARD TABLE OF MMIV_SI_S_PO_HISTORY,
      WA_MMIV_SI_S_PO_HISTORY TYPE MMIV_SI_S_PO_HISTORY,
      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_SI_S_PO_HISTORY> TYPE MMIV_SI_S_PO_HISTORY.

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM MMIV_SI_S_PO_HISTORY
*  INTO TABLE @DATA(IT_MMIV_SI_S_PO_HISTORY2).
*--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_SI_S_PO_HISTORY INDEX 1 INTO DATA(WA_MMIV_SI_S_PO_HISTORY2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<MMIV_SI_S_PO_HISTORY>-PARENT_KEY = 1.
<MMIV_SI_S_PO_HISTORY>-ROOT_KEY = 1.
<MMIV_SI_S_PO_HISTORY>-STATE = 1.
<MMIV_SI_S_PO_HISTORY>-EBELN = 1.
<MMIV_SI_S_PO_HISTORY>-EBELP = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_MMIV_SI_S_PO_HISTORY-VGABE, sy-vline,
  WA_MMIV_SI_S_PO_HISTORY-GJAHR, sy-vline,
  WA_MMIV_SI_S_PO_HISTORY-BELNR, sy-vline,
  WA_MMIV_SI_S_PO_HISTORY-BUZEI, sy-vline,
  WA_MMIV_SI_S_PO_HISTORY-BEWTP, sy-vline,
  WA_MMIV_SI_S_PO_HISTORY-BEWTK, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_MMIV_SI_S_PO_HISTORY 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_SI_S_PO_HISTORY 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_SI_S_PO_HISTORY INTO WA_MMIV_SI_S_PO_HISTORY.


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

*Conversion exit GJAHR, internal->external for field GJAHR
CALL FUNCTION 'CONVERSION_EXIT_GJAHR_OUTPUT'
  EXPORTING
    input =                      WA_MMIV_SI_S_PO_HISTORY-GJAHR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MMIV_SI_S_PO_HISTORY-GJAHR.
WRITE:/ 'New Value:', ld_input.

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

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

*Conversion exit GJAHR, internal->external for field LFGJA
CALL FUNCTION 'CONVERSION_EXIT_GJAHR_OUTPUT'
  EXPORTING
    input =                      WA_MMIV_SI_S_PO_HISTORY-LFGJA
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MMIV_SI_S_PO_HISTORY-LFGJA.
WRITE:/ 'New Value:', ld_input.

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

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

*Conversion exit GJAHR, internal->external for field STJAH
CALL FUNCTION 'CONVERSION_EXIT_GJAHR_OUTPUT'
  EXPORTING
    input =                      WA_MMIV_SI_S_PO_HISTORY-STJAH
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MMIV_SI_S_PO_HISTORY-STJAH.
WRITE:/ 'New Value:', ld_input.

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

*Conversion exit GJAHR, internal->external for field RE_GJAHR
CALL FUNCTION 'CONVERSION_EXIT_GJAHR_OUTPUT'
  EXPORTING
    input =                      WA_MMIV_SI_S_PO_HISTORY-RE_GJAHR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MMIV_SI_S_PO_HISTORY-RE_GJAHR.
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_SI_S_PO_HISTORY_STR, 
PARENT_KEY TYPE STRING,
ROOT_KEY TYPE STRING,
STATE TYPE STRING,
EBELN TYPE STRING,
EBELP TYPE STRING,
VGABE TYPE STRING,
GJAHR TYPE STRING,
BELNR TYPE STRING,
BUZEI TYPE STRING,
BEWTP TYPE STRING,
BEWTK TYPE STRING,
BEWTL TYPE STRING,
LFBNR TYPE STRING,
LFGJA TYPE STRING,
LFPOS TYPE STRING,
ZAEHK TYPE STRING,
STUNR TYPE STRING,
MENGE TYPE STRING,
MEINS TYPE STRING,
WRBTR TYPE STRING,
WAERS TYPE STRING,
QUANTITY_RELEVANT TYPE STRING,
AMOUNT_RELEVANT TYPE STRING,
STATUS_TEXT TYPE STRING,
POSITION TYPE STRING,
CHILD_POSITION TYPE STRING,
SEMANTIC_OBJECT TYPE STRING,
NAVIGATION_SUPPORTED TYPE STRING,
STBLG TYPE STRING,
STJAH TYPE STRING,
NETWR TYPE STRING,
IS_PO_ITEM TYPE STRING,
RE_BELNR TYPE STRING,
RE_GJAHR TYPE STRING,
RE_BUZEI TYPE STRING,
BUKRS TYPE STRING,
WERKS TYPE STRING,END OF T_EKKO_STR.
DATA: WA_MMIV_SI_S_PO_HISTORY_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_SI_S_PO_HISTORY_STR-PARENT_KEY sy-vline 
WA_MMIV_SI_S_PO_HISTORY_STR-ROOT_KEY sy-vline 
WA_MMIV_SI_S_PO_HISTORY_STR-STATE sy-vline 
WA_MMIV_SI_S_PO_HISTORY_STR-EBELN sy-vline 
WA_MMIV_SI_S_PO_HISTORY_STR-EBELP sy-vline 
WA_MMIV_SI_S_PO_HISTORY_STR-VGABE sy-vline 
WA_MMIV_SI_S_PO_HISTORY_STR-GJAHR sy-vline 
WA_MMIV_SI_S_PO_HISTORY_STR-BELNR sy-vline 
WA_MMIV_SI_S_PO_HISTORY_STR-BUZEI sy-vline 
WA_MMIV_SI_S_PO_HISTORY_STR-BEWTP sy-vline 
WA_MMIV_SI_S_PO_HISTORY_STR-BEWTK sy-vline 
WA_MMIV_SI_S_PO_HISTORY_STR-BEWTL sy-vline 
WA_MMIV_SI_S_PO_HISTORY_STR-LFBNR sy-vline 
WA_MMIV_SI_S_PO_HISTORY_STR-LFGJA sy-vline 
WA_MMIV_SI_S_PO_HISTORY_STR-LFPOS sy-vline 
WA_MMIV_SI_S_PO_HISTORY_STR-ZAEHK sy-vline 
WA_MMIV_SI_S_PO_HISTORY_STR-STUNR sy-vline 
WA_MMIV_SI_S_PO_HISTORY_STR-MENGE sy-vline 
WA_MMIV_SI_S_PO_HISTORY_STR-MEINS sy-vline 
WA_MMIV_SI_S_PO_HISTORY_STR-WRBTR sy-vline 
WA_MMIV_SI_S_PO_HISTORY_STR-WAERS sy-vline 
WA_MMIV_SI_S_PO_HISTORY_STR-QUANTITY_RELEVANT sy-vline 
WA_MMIV_SI_S_PO_HISTORY_STR-AMOUNT_RELEVANT sy-vline 
WA_MMIV_SI_S_PO_HISTORY_STR-STATUS_TEXT sy-vline 
WA_MMIV_SI_S_PO_HISTORY_STR-POSITION sy-vline 
WA_MMIV_SI_S_PO_HISTORY_STR-CHILD_POSITION sy-vline 
WA_MMIV_SI_S_PO_HISTORY_STR-SEMANTIC_OBJECT sy-vline 
WA_MMIV_SI_S_PO_HISTORY_STR-NAVIGATION_SUPPORTED sy-vline 
WA_MMIV_SI_S_PO_HISTORY_STR-STBLG sy-vline 
WA_MMIV_SI_S_PO_HISTORY_STR-STJAH sy-vline 
WA_MMIV_SI_S_PO_HISTORY_STR-NETWR sy-vline 
WA_MMIV_SI_S_PO_HISTORY_STR-IS_PO_ITEM sy-vline 
WA_MMIV_SI_S_PO_HISTORY_STR-RE_BELNR sy-vline 
WA_MMIV_SI_S_PO_HISTORY_STR-RE_GJAHR sy-vline 
WA_MMIV_SI_S_PO_HISTORY_STR-RE_BUZEI sy-vline 
WA_MMIV_SI_S_PO_HISTORY_STR-BUKRS sy-vline 
WA_MMIV_SI_S_PO_HISTORY_STR-WERKS sy-vline      INTO ld_text SEPARATED BY SPACE.

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