ABAP Select data from SAP table NCHGRECREFPPU into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM NCHGRECREFPPU
*  INTO TABLE @DATA(IT_NCHGRECREFPPU2).
*--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_NCHGRECREFPPU INDEX 1 INTO DATA(WA_NCHGRECREFPPU2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<NCHGRECREFPPU>-MANDT = 1.
<NCHGRECREFPPU>-CHANGERECORDREFERENCEUUID = 1.
<NCHGRECREFPPU>-PURCHASEORDER = 1.
<NCHGRECREFPPU>-PURCHASEORDERTYPE = 1.
<NCHGRECREFPPU>-SUPPLIER = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_NCHGRECREFPPU-SUPPLYINGPLANT, sy-vline,
  WA_NCHGRECREFPPU-PURCHASEORDERDATE, sy-vline,
  WA_NCHGRECREFPPU-PURCHASECONTRACT, sy-vline,
  WA_NCHGRECREFPPU-PURCHASINGGROUP, sy-vline,
  WA_NCHGRECREFPPU-PURCHASINGORGANIZATION, sy-vline,
  WA_NCHGRECREFPPU-CHANGERECORDTYPE, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_NCHGRECREFPPU 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_NCHGRECREFPPU 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_NCHGRECREFPPU INTO WA_NCHGRECREFPPU.


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

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

*Conversion exit ALPHA, internal->external for field PURCHASECONTRACT
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_NCHGRECREFPPU-PURCHASECONTRACT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_NCHGRECREFPPU-PURCHASECONTRACT.
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_NCHGRECREFPPU_STR, 
MANDT TYPE STRING,
CHANGERECORDREFERENCEUUID TYPE STRING,
PURCHASEORDER TYPE STRING,
PURCHASEORDERTYPE TYPE STRING,
SUPPLIER TYPE STRING,
SUPPLYINGPLANT TYPE STRING,
PURCHASEORDERDATE TYPE STRING,
PURCHASECONTRACT TYPE STRING,
PURCHASINGGROUP TYPE STRING,
PURCHASINGORGANIZATION TYPE STRING,
CHANGERECORDTYPE TYPE STRING,
CHANGERECORDUUID TYPE STRING,
CHANGERECORDREFERENCETYPE TYPE STRING,
PARENTCHANGERECORDREFUUID TYPE STRING,
CHANGERECORDITEMRELEVANCE TYPE STRING,
CHANGERECORDREFERENCE TYPE STRING,
CREATEDBYUSER TYPE STRING,
CREATIONDATETIME TYPE STRING,
CREATIONDATE TYPE STRING,
LASTCHANGEDBYUSER TYPE STRING,
LASTCHANGEDATETIME TYPE STRING,
LASTCHANGEDATE TYPE STRING,END OF T_EKKO_STR.
DATA: WA_NCHGRECREFPPU_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_NCHGRECREFPPU_STR-MANDT sy-vline 
WA_NCHGRECREFPPU_STR-CHANGERECORDREFERENCEUUID sy-vline 
WA_NCHGRECREFPPU_STR-PURCHASEORDER sy-vline 
WA_NCHGRECREFPPU_STR-PURCHASEORDERTYPE sy-vline 
WA_NCHGRECREFPPU_STR-SUPPLIER sy-vline 
WA_NCHGRECREFPPU_STR-SUPPLYINGPLANT sy-vline 
WA_NCHGRECREFPPU_STR-PURCHASEORDERDATE sy-vline 
WA_NCHGRECREFPPU_STR-PURCHASECONTRACT sy-vline 
WA_NCHGRECREFPPU_STR-PURCHASINGGROUP sy-vline 
WA_NCHGRECREFPPU_STR-PURCHASINGORGANIZATION sy-vline 
WA_NCHGRECREFPPU_STR-CHANGERECORDTYPE sy-vline 
WA_NCHGRECREFPPU_STR-CHANGERECORDUUID sy-vline 
WA_NCHGRECREFPPU_STR-CHANGERECORDREFERENCETYPE sy-vline 
WA_NCHGRECREFPPU_STR-PARENTCHANGERECORDREFUUID sy-vline 
WA_NCHGRECREFPPU_STR-CHANGERECORDITEMRELEVANCE sy-vline 
WA_NCHGRECREFPPU_STR-CHANGERECORDREFERENCE sy-vline 
WA_NCHGRECREFPPU_STR-CREATEDBYUSER sy-vline 
WA_NCHGRECREFPPU_STR-CREATIONDATETIME sy-vline 
WA_NCHGRECREFPPU_STR-CREATIONDATE sy-vline 
WA_NCHGRECREFPPU_STR-LASTCHANGEDBYUSER sy-vline 
WA_NCHGRECREFPPU_STR-LASTCHANGEDATETIME sy-vline 
WA_NCHGRECREFPPU_STR-LASTCHANGEDATE sy-vline      INTO ld_text SEPARATED BY SPACE.

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