ABAP Select data from SAP table MIGO_REFDOCKEY into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM MIGO_REFDOCKEY
*  INTO TABLE @DATA(IT_MIGO_REFDOCKEY2).
*--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_MIGO_REFDOCKEY INDEX 1 INTO DATA(WA_MIGO_REFDOCKEY2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<MIGO_REFDOCKEY>-PO_NUMBER = 1.
<MIGO_REFDOCKEY>-PO_ITEM = 1.
<MIGO_REFDOCKEY>-PO_WERKS = 1.
<MIGO_REFDOCKEY>-MAT_DOC = 1.
<MIGO_REFDOCKEY>-DOC_YEAR = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_MIGO_REFDOCKEY-DELIVERY_NOTE, sy-vline,
  WA_MIGO_REFDOCKEY-INBOUND_DELIVERY, sy-vline,
  WA_MIGO_REFDOCKEY-OUTBOUND_DELIVERY, sy-vline,
  WA_MIGO_REFDOCKEY-SHIPPING_UNIT, sy-vline,
  WA_MIGO_REFDOCKEY-TRANSPORT, sy-vline,
  WA_MIGO_REFDOCKEY-TRANSPORTIDENT, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_MIGO_REFDOCKEY 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_MIGO_REFDOCKEY 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_MIGO_REFDOCKEY INTO WA_MIGO_REFDOCKEY.


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

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

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

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

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

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

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

*Conversion exit NUMCV, internal->external for field ORDER_OPERATION
CALL FUNCTION 'CONVERSION_EXIT_NUMCV_OUTPUT'
  EXPORTING
    input =                      WA_MIGO_REFDOCKEY-ORDER_OPERATION
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MIGO_REFDOCKEY-ORDER_OPERATION.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field JIT_CALL_NUMBER
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_MIGO_REFDOCKEY-JIT_CALL_NUMBER
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MIGO_REFDOCKEY-JIT_CALL_NUMBER.
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_MIGO_REFDOCKEY_STR, 
PO_NUMBER TYPE STRING,
PO_ITEM TYPE STRING,
PO_WERKS TYPE STRING,
MAT_DOC TYPE STRING,
DOC_YEAR TYPE STRING,
DELIVERY_NOTE TYPE STRING,
INBOUND_DELIVERY TYPE STRING,
OUTBOUND_DELIVERY TYPE STRING,
SHIPPING_UNIT TYPE STRING,
TRANSPORT TYPE STRING,
TRANSPORTIDENT TYPE STRING,
TRANSPORT_MEANS TYPE STRING,
GUID TYPE STRING,
REFID TYPE STRING,
ORDER_NUMBER TYPE STRING,
ORDER_ITEM TYPE STRING,
ORDER_OPERATION TYPE STRING,
JIT_CALL_NUMBER TYPE STRING,
RESERVATION_NUMBER TYPE STRING,
RESERVATION_ITEM TYPE STRING,
RESERVATION_TYPE TYPE STRING,END OF T_EKKO_STR.
DATA: WA_MIGO_REFDOCKEY_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_MIGO_REFDOCKEY_STR-PO_NUMBER sy-vline 
WA_MIGO_REFDOCKEY_STR-PO_ITEM sy-vline 
WA_MIGO_REFDOCKEY_STR-PO_WERKS sy-vline 
WA_MIGO_REFDOCKEY_STR-MAT_DOC sy-vline 
WA_MIGO_REFDOCKEY_STR-DOC_YEAR sy-vline 
WA_MIGO_REFDOCKEY_STR-DELIVERY_NOTE sy-vline 
WA_MIGO_REFDOCKEY_STR-INBOUND_DELIVERY sy-vline 
WA_MIGO_REFDOCKEY_STR-OUTBOUND_DELIVERY sy-vline 
WA_MIGO_REFDOCKEY_STR-SHIPPING_UNIT sy-vline 
WA_MIGO_REFDOCKEY_STR-TRANSPORT sy-vline 
WA_MIGO_REFDOCKEY_STR-TRANSPORTIDENT sy-vline 
WA_MIGO_REFDOCKEY_STR-TRANSPORT_MEANS sy-vline 
WA_MIGO_REFDOCKEY_STR-GUID sy-vline 
WA_MIGO_REFDOCKEY_STR-REFID sy-vline 
WA_MIGO_REFDOCKEY_STR-ORDER_NUMBER sy-vline 
WA_MIGO_REFDOCKEY_STR-ORDER_ITEM sy-vline 
WA_MIGO_REFDOCKEY_STR-ORDER_OPERATION sy-vline 
WA_MIGO_REFDOCKEY_STR-JIT_CALL_NUMBER sy-vline 
WA_MIGO_REFDOCKEY_STR-RESERVATION_NUMBER sy-vline 
WA_MIGO_REFDOCKEY_STR-RESERVATION_ITEM sy-vline 
WA_MIGO_REFDOCKEY_STR-RESERVATION_TYPE sy-vline      INTO ld_text SEPARATED BY SPACE.

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