ABAP Select data from SAP table RFM_ALIGN_MATCHING_PO into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM RFM_ALIGN_MATCHING_PO
*  INTO TABLE @DATA(IT_RFM_ALIGN_MATCHING_PO2).
*--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_RFM_ALIGN_MATCHING_PO INDEX 1 INTO DATA(WA_RFM_ALIGN_MATCHING_PO2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<RFM_ALIGN_MATCHING_PO>-PURCHASINGDOCUMENT = 1.
<RFM_ALIGN_MATCHING_PO>-PURCHASINGDOCUMENTITEM = 1.
<RFM_ALIGN_MATCHING_PO>-PURORDERITEMPLANT = 1.
<RFM_ALIGN_MATCHING_PO>-PURCHASEORDERITEMSTOCKSEGMENT = 1.
<RFM_ALIGN_MATCHING_PO>-PURCHASEORDERITEMSEASONYEAR = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_RFM_ALIGN_MATCHING_PO-PURCHASEORDERITEMSEASON, sy-vline,
  WA_RFM_ALIGN_MATCHING_PO-PURCHASEORDERITEMCOLLECTION, sy-vline,
  WA_RFM_ALIGN_MATCHING_PO-PURCHASEORDERITEMTHEME, sy-vline,
  WA_RFM_ALIGN_MATCHING_PO-SCHEDULELINEDELIVERYDATE, sy-vline,
  WA_RFM_ALIGN_MATCHING_PO-ORDERQUANTITYINBASEUNIT, sy-vline,
  WA_RFM_ALIGN_MATCHING_PO-PURCHASEORDERQUANTITYUNIT, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_RFM_ALIGN_MATCHING_PO 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_RFM_ALIGN_MATCHING_PO 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_RFM_ALIGN_MATCHING_PO INTO WA_RFM_ALIGN_MATCHING_PO.


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

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

*Conversion exit ALPHA, internal->external for field PURCHASEREQUISITION
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RFM_ALIGN_MATCHING_PO-PURCHASEREQUISITION
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RFM_ALIGN_MATCHING_PO-PURCHASEREQUISITION.
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_RFM_ALIGN_MATCHING_PO_STR, 
PURCHASINGDOCUMENT TYPE STRING,
PURCHASINGDOCUMENTITEM TYPE STRING,
PURORDERITEMPLANT TYPE STRING,
PURCHASEORDERITEMSTOCKSEGMENT TYPE STRING,
PURCHASEORDERITEMSEASONYEAR TYPE STRING,
PURCHASEORDERITEMSEASON TYPE STRING,
PURCHASEORDERITEMCOLLECTION TYPE STRING,
PURCHASEORDERITEMTHEME TYPE STRING,
SCHEDULELINEDELIVERYDATE TYPE STRING,
ORDERQUANTITYINBASEUNIT TYPE STRING,
PURCHASEORDERQUANTITYUNIT TYPE STRING,
PURREQNHASCROSSPLANTALIGNMENT TYPE STRING,
PURREQNHASCROSSSEASONALIGNMENT TYPE STRING,
PURREQNHASCROSSSGMTALIGNMENT TYPE STRING,
PURREQNHASDIVINPROCALIGNMENT TYPE STRING,
PROPOSALTYPE TYPE STRING,
PURCHASEREQUISITION TYPE STRING,
PURCHASEREQUISITIONITEM TYPE STRING,
DIVERSIONSTATUS TYPE STRING,END OF T_EKKO_STR.
DATA: WA_RFM_ALIGN_MATCHING_PO_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_RFM_ALIGN_MATCHING_PO_STR-PURCHASINGDOCUMENT sy-vline 
WA_RFM_ALIGN_MATCHING_PO_STR-PURCHASINGDOCUMENTITEM sy-vline 
WA_RFM_ALIGN_MATCHING_PO_STR-PURORDERITEMPLANT sy-vline 
WA_RFM_ALIGN_MATCHING_PO_STR-PURCHASEORDERITEMSTOCKSEGMENT sy-vline 
WA_RFM_ALIGN_MATCHING_PO_STR-PURCHASEORDERITEMSEASONYEAR sy-vline 
WA_RFM_ALIGN_MATCHING_PO_STR-PURCHASEORDERITEMSEASON sy-vline 
WA_RFM_ALIGN_MATCHING_PO_STR-PURCHASEORDERITEMCOLLECTION sy-vline 
WA_RFM_ALIGN_MATCHING_PO_STR-PURCHASEORDERITEMTHEME sy-vline 
WA_RFM_ALIGN_MATCHING_PO_STR-SCHEDULELINEDELIVERYDATE sy-vline 
WA_RFM_ALIGN_MATCHING_PO_STR-ORDERQUANTITYINBASEUNIT sy-vline 
WA_RFM_ALIGN_MATCHING_PO_STR-PURCHASEORDERQUANTITYUNIT sy-vline 
WA_RFM_ALIGN_MATCHING_PO_STR-PURREQNHASCROSSPLANTALIGNMENT sy-vline 
WA_RFM_ALIGN_MATCHING_PO_STR-PURREQNHASCROSSSEASONALIGNMENT sy-vline 
WA_RFM_ALIGN_MATCHING_PO_STR-PURREQNHASCROSSSGMTALIGNMENT sy-vline 
WA_RFM_ALIGN_MATCHING_PO_STR-PURREQNHASDIVINPROCALIGNMENT sy-vline 
WA_RFM_ALIGN_MATCHING_PO_STR-PROPOSALTYPE sy-vline 
WA_RFM_ALIGN_MATCHING_PO_STR-PURCHASEREQUISITION sy-vline 
WA_RFM_ALIGN_MATCHING_PO_STR-PURCHASEREQUISITIONITEM sy-vline 
WA_RFM_ALIGN_MATCHING_PO_STR-DIVERSIONSTATUS sy-vline      INTO ld_text SEPARATED BY SPACE.

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