ABAP Select data from SAP table NCHGRECREFPSV into internal table

Get Example source ABAP code based on a different SAP table
  Get ABAP code

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM NCHGRECREFPSV
*  INTO TABLE @DATA(IT_NCHGRECREFPSV2).
*--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_NCHGRECREFPSV INDEX 1 INTO DATA(WA_NCHGRECREFPSV2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<NCHGRECREFPSV>-MANDT = 1.
<NCHGRECREFPSV>-CHANGERECORDREFERENCEUUID = 1.
<NCHGRECREFPSV>-CLASS = 1.
<NCHGRECREFPSV>-PRODUCTSTRUCTURENODENAME = 1.
<NCHGRECREFPSV>-PRODSTRUCNODEDESCRIPTION = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_NCHGRECREFPSV-PRODUCTSTRUCTUREVARIANTNAME, sy-vline,
  WA_NCHGRECREFPSV-PRODSTRUCVARIANTDESCRIPTION, sy-vline,
  WA_NCHGRECREFPSV-PRODSTRUCVARIANTCHANGENUMBER, sy-vline,
  WA_NCHGRECREFPSV-MATERIAL, sy-vline,
  WA_NCHGRECREFPSV-CHANGERECORDTYPE, sy-vline,
  WA_NCHGRECREFPSV-CHANGERECORDUUID, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_NCHGRECREFPSV 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_NCHGRECREFPSV 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_NCHGRECREFPSV INTO WA_NCHGRECREFPSV.


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

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

*Conversion exit MATN1, internal->external for field MATERIAL
CALL FUNCTION 'CONVERSION_EXIT_MATN1_OUTPUT'
  EXPORTING
    input =                      WA_NCHGRECREFPSV-MATERIAL
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_NCHGRECREFPSV-MATERIAL.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field CHANGENUMBER
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_NCHGRECREFPSV-CHANGENUMBER
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_NCHGRECREFPSV-CHANGENUMBER.
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_NCHGRECREFPSV_STR, 
MANDT TYPE STRING,
CHANGERECORDREFERENCEUUID TYPE STRING,
CLASS TYPE STRING,
PRODUCTSTRUCTURENODENAME TYPE STRING,
PRODSTRUCNODEDESCRIPTION TYPE STRING,
PRODUCTSTRUCTUREVARIANTNAME TYPE STRING,
PRODSTRUCVARIANTDESCRIPTION TYPE STRING,
PRODSTRUCVARIANTCHANGENUMBER TYPE STRING,
MATERIAL 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,
CHANGENUMBER TYPE STRING,END OF T_EKKO_STR.
DATA: WA_NCHGRECREFPSV_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_NCHGRECREFPSV_STR-MANDT sy-vline 
WA_NCHGRECREFPSV_STR-CHANGERECORDREFERENCEUUID sy-vline 
WA_NCHGRECREFPSV_STR-CLASS sy-vline 
WA_NCHGRECREFPSV_STR-PRODUCTSTRUCTURENODENAME sy-vline 
WA_NCHGRECREFPSV_STR-PRODSTRUCNODEDESCRIPTION sy-vline 
WA_NCHGRECREFPSV_STR-PRODUCTSTRUCTUREVARIANTNAME sy-vline 
WA_NCHGRECREFPSV_STR-PRODSTRUCVARIANTDESCRIPTION sy-vline 
WA_NCHGRECREFPSV_STR-PRODSTRUCVARIANTCHANGENUMBER sy-vline 
WA_NCHGRECREFPSV_STR-MATERIAL sy-vline 
WA_NCHGRECREFPSV_STR-CHANGERECORDTYPE sy-vline 
WA_NCHGRECREFPSV_STR-CHANGERECORDUUID sy-vline 
WA_NCHGRECREFPSV_STR-CHANGERECORDREFERENCETYPE sy-vline 
WA_NCHGRECREFPSV_STR-PARENTCHANGERECORDREFUUID sy-vline 
WA_NCHGRECREFPSV_STR-CHANGERECORDITEMRELEVANCE sy-vline 
WA_NCHGRECREFPSV_STR-CHANGERECORDREFERENCE sy-vline 
WA_NCHGRECREFPSV_STR-CREATEDBYUSER sy-vline 
WA_NCHGRECREFPSV_STR-CREATIONDATETIME sy-vline 
WA_NCHGRECREFPSV_STR-CREATIONDATE sy-vline 
WA_NCHGRECREFPSV_STR-LASTCHANGEDBYUSER sy-vline 
WA_NCHGRECREFPSV_STR-LASTCHANGEDATETIME sy-vline 
WA_NCHGRECREFPSV_STR-LASTCHANGEDATE sy-vline 
WA_NCHGRECREFPSV_STR-CHANGENUMBER sy-vline      INTO ld_text SEPARATED BY SPACE.

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