ABAP Select data from SAP table IOPNPRFORCONTR into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM IOPNPRFORCONTR
*  INTO TABLE @DATA(IT_IOPNPRFORCONTR2).
*--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_IOPNPRFORCONTR INDEX 1 INTO DATA(WA_IOPNPRFORCONTR2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<IOPNPRFORCONTR>-MANDT = 1.
<IOPNPRFORCONTR>-PURCHASECONTRACT = 1.
<IOPNPRFORCONTR>-PURCHASECONTRACTITEM = 1.
<IOPNPRFORCONTR>-PURCHASEREQUISITION = 1.
<IOPNPRFORCONTR>-PURCHASEREQUISITIONITEM = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_IOPNPRFORCONTR-CONTRACTITEMCATEGORY, sy-vline,
  WA_IOPNPRFORCONTR-PURREQITEMCATEGORY, sy-vline,
  WA_IOPNPRFORCONTR-PURCHASECONTRACTITEMUNIQUEID, sy-vline,
  WA_IOPNPRFORCONTR-PURCHASECONTRACTTYPE, sy-vline,
  WA_IOPNPRFORCONTR-SUPPLIER, sy-vline,
  WA_IOPNPRFORCONTR-PURCHASEREQNITEMUNIQUEID, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_IOPNPRFORCONTR 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_IOPNPRFORCONTR 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_IOPNPRFORCONTR INTO WA_IOPNPRFORCONTR.


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

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

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

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

*Conversion exit ALPHA, internal->external for field PURCHASEREQNITEMUNIQUEID
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_IOPNPRFORCONTR-PURCHASEREQNITEMUNIQUEID
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_IOPNPRFORCONTR-PURCHASEREQNITEMUNIQUEID.
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_IOPNPRFORCONTR_STR, 
MANDT TYPE STRING,
PURCHASECONTRACT TYPE STRING,
PURCHASECONTRACTITEM TYPE STRING,
PURCHASEREQUISITION TYPE STRING,
PURCHASEREQUISITIONITEM TYPE STRING,
CONTRACTITEMCATEGORY TYPE STRING,
PURREQITEMCATEGORY TYPE STRING,
PURCHASECONTRACTITEMUNIQUEID TYPE STRING,
PURCHASECONTRACTTYPE TYPE STRING,
SUPPLIER TYPE STRING,
PURCHASEREQNITEMUNIQUEID TYPE STRING,
PURCHASEREQUISITIONTYPE TYPE STRING,
PURCHASINGORGANIZATION TYPE STRING,
PURCHASINGGROUP TYPE STRING,
MATERIALGROUP TYPE STRING,
PLANT TYPE STRING,END OF T_EKKO_STR.
DATA: WA_IOPNPRFORCONTR_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_IOPNPRFORCONTR_STR-MANDT sy-vline 
WA_IOPNPRFORCONTR_STR-PURCHASECONTRACT sy-vline 
WA_IOPNPRFORCONTR_STR-PURCHASECONTRACTITEM sy-vline 
WA_IOPNPRFORCONTR_STR-PURCHASEREQUISITION sy-vline 
WA_IOPNPRFORCONTR_STR-PURCHASEREQUISITIONITEM sy-vline 
WA_IOPNPRFORCONTR_STR-CONTRACTITEMCATEGORY sy-vline 
WA_IOPNPRFORCONTR_STR-PURREQITEMCATEGORY sy-vline 
WA_IOPNPRFORCONTR_STR-PURCHASECONTRACTITEMUNIQUEID sy-vline 
WA_IOPNPRFORCONTR_STR-PURCHASECONTRACTTYPE sy-vline 
WA_IOPNPRFORCONTR_STR-SUPPLIER sy-vline 
WA_IOPNPRFORCONTR_STR-PURCHASEREQNITEMUNIQUEID sy-vline 
WA_IOPNPRFORCONTR_STR-PURCHASEREQUISITIONTYPE sy-vline 
WA_IOPNPRFORCONTR_STR-PURCHASINGORGANIZATION sy-vline 
WA_IOPNPRFORCONTR_STR-PURCHASINGGROUP sy-vline 
WA_IOPNPRFORCONTR_STR-MATERIALGROUP sy-vline 
WA_IOPNPRFORCONTR_STR-PLANT sy-vline      INTO ld_text SEPARATED BY SPACE.

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