ABAP Select data from SAP table MMPUR_S_PR_RPL_HDR_WFL 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_PR_RPL_HDR_WFL 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_PR_RPL_HDR_WFL. 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_PR_RPL_HDR_WFL 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_PR_RPL_HDR_WFL TYPE STANDARD TABLE OF MMPUR_S_PR_RPL_HDR_WFL,
      WA_MMPUR_S_PR_RPL_HDR_WFL TYPE MMPUR_S_PR_RPL_HDR_WFL,
      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_PR_RPL_HDR_WFL> TYPE MMPUR_S_PR_RPL_HDR_WFL.

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM MMPUR_S_PR_RPL_HDR_WFL
*  INTO TABLE @DATA(IT_MMPUR_S_PR_RPL_HDR_WFL2).
*--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_PR_RPL_HDR_WFL INDEX 1 INTO DATA(WA_MMPUR_S_PR_RPL_HDR_WFL2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<MMPUR_S_PR_RPL_HDR_WFL>-PROCMTHUBPURCHASEREQUISITION = 1.
<MMPUR_S_PR_RPL_HDR_WFL>-PROCMTHUBPURREQUISITIONITEM = 1.
<MMPUR_S_PR_RPL_HDR_WFL>-PROCESSINGSTATUS = 1.
<MMPUR_S_PR_RPL_HDR_WFL>-PURCHASEREQUISITIONTYPE = 1.
<MMPUR_S_PR_RPL_HDR_WFL>-ITEMNETAMOUNT = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_MMPUR_S_PR_RPL_HDR_WFL-PURREQNPRICEQUANTITY, sy-vline,
  WA_MMPUR_S_PR_RPL_HDR_WFL-PROCMTHUBPURCHASINGORG, sy-vline,
  WA_MMPUR_S_PR_RPL_HDR_WFL-PROCMTHUBPURCHASINGGROUP, sy-vline,
  WA_MMPUR_S_PR_RPL_HDR_WFL-PROCUREMENTHUBSOURCESYSTEM, sy-vline,
  WA_MMPUR_S_PR_RPL_HDR_WFL-PROCMTHUBPLANT, sy-vline,
  WA_MMPUR_S_PR_RPL_HDR_WFL-PROCMTHUBCOMPANYCODEUNIQUEID, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_MMPUR_S_PR_RPL_HDR_WFL 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_PR_RPL_HDR_WFL 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_PR_RPL_HDR_WFL INTO WA_MMPUR_S_PR_RPL_HDR_WFL.


*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 PROCMTHUBPURCHASEREQUISITION
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_MMPUR_S_PR_RPL_HDR_WFL-PROCMTHUBPURCHASEREQUISITION
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MMPUR_S_PR_RPL_HDR_WFL-PROCMTHUBPURCHASEREQUISITION.
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_PR_RPL_HDR_WFL_STR, 
PROCMTHUBPURCHASEREQUISITION TYPE STRING,
PROCMTHUBPURREQUISITIONITEM TYPE STRING,
PROCESSINGSTATUS TYPE STRING,
PURCHASEREQUISITIONTYPE TYPE STRING,
ITEMNETAMOUNT TYPE STRING,
PURREQNPRICEQUANTITY TYPE STRING,
PROCMTHUBPURCHASINGORG TYPE STRING,
PROCMTHUBPURCHASINGGROUP TYPE STRING,
PROCUREMENTHUBSOURCESYSTEM TYPE STRING,
PROCMTHUBPLANT TYPE STRING,
PROCMTHUBCOMPANYCODEUNIQUEID TYPE STRING,
PROCMTHUBCOMPANYCODE TYPE STRING,
PROCMTHUBPURREQUISITIONTYPE TYPE STRING,
PURREQNORIGIN TYPE STRING,
PROCMTHUBPRODUCTGROUP TYPE STRING,
PROCMTHUBACCTASSGMTCATEGORY TYPE STRING,
PROCMTHUBPURORGUNIQUEID TYPE STRING,
PROCMTHUBPURGDOCITMCATEGORY TYPE STRING,
PROCMTHUBPLANTUNIQUEID TYPE STRING,
PURREQNITEMCURRENCY TYPE STRING,END OF T_EKKO_STR.
DATA: WA_MMPUR_S_PR_RPL_HDR_WFL_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_PR_RPL_HDR_WFL_STR-PROCMTHUBPURCHASEREQUISITION sy-vline 
WA_MMPUR_S_PR_RPL_HDR_WFL_STR-PROCMTHUBPURREQUISITIONITEM sy-vline 
WA_MMPUR_S_PR_RPL_HDR_WFL_STR-PROCESSINGSTATUS sy-vline 
WA_MMPUR_S_PR_RPL_HDR_WFL_STR-PURCHASEREQUISITIONTYPE sy-vline 
WA_MMPUR_S_PR_RPL_HDR_WFL_STR-ITEMNETAMOUNT sy-vline 
WA_MMPUR_S_PR_RPL_HDR_WFL_STR-PURREQNPRICEQUANTITY sy-vline 
WA_MMPUR_S_PR_RPL_HDR_WFL_STR-PROCMTHUBPURCHASINGORG sy-vline 
WA_MMPUR_S_PR_RPL_HDR_WFL_STR-PROCMTHUBPURCHASINGGROUP sy-vline 
WA_MMPUR_S_PR_RPL_HDR_WFL_STR-PROCUREMENTHUBSOURCESYSTEM sy-vline 
WA_MMPUR_S_PR_RPL_HDR_WFL_STR-PROCMTHUBPLANT sy-vline 
WA_MMPUR_S_PR_RPL_HDR_WFL_STR-PROCMTHUBCOMPANYCODEUNIQUEID sy-vline 
WA_MMPUR_S_PR_RPL_HDR_WFL_STR-PROCMTHUBCOMPANYCODE sy-vline 
WA_MMPUR_S_PR_RPL_HDR_WFL_STR-PROCMTHUBPURREQUISITIONTYPE sy-vline 
WA_MMPUR_S_PR_RPL_HDR_WFL_STR-PURREQNORIGIN sy-vline 
WA_MMPUR_S_PR_RPL_HDR_WFL_STR-PROCMTHUBPRODUCTGROUP sy-vline 
WA_MMPUR_S_PR_RPL_HDR_WFL_STR-PROCMTHUBACCTASSGMTCATEGORY sy-vline 
WA_MMPUR_S_PR_RPL_HDR_WFL_STR-PROCMTHUBPURORGUNIQUEID sy-vline 
WA_MMPUR_S_PR_RPL_HDR_WFL_STR-PROCMTHUBPURGDOCITMCATEGORY sy-vline 
WA_MMPUR_S_PR_RPL_HDR_WFL_STR-PROCMTHUBPLANTUNIQUEID sy-vline 
WA_MMPUR_S_PR_RPL_HDR_WFL_STR-PURREQNITEMCURRENCY sy-vline      INTO ld_text SEPARATED BY SPACE.

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