ABAP Select data from SAP table NCHGRCDOBJPGDOC into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM NCHGRCDOBJPGDOC
*  INTO TABLE @DATA(IT_NCHGRCDOBJPGDOC2).
*--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_NCHGRCDOBJPGDOC INDEX 1 INTO DATA(WA_NCHGRCDOBJPGDOC2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<NCHGRCDOBJPGDOC>-MANDT = 1.
<NCHGRCDOBJPGDOC>-CHANGERECORDREFERENCEUUID = 1.
<NCHGRCDOBJPGDOC>-DOCUMENTINFORECORD = 1.
<NCHGRCDOBJPGDOC>-DOCUMENTTYPE = 1.
<NCHGRCDOBJPGDOC>-DOCUMENTPART = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_NCHGRCDOBJPGDOC-DOCUMENTVERSION, sy-vline,
  WA_NCHGRCDOBJPGDOC-CHANGERECORDTYPE, sy-vline,
  WA_NCHGRCDOBJPGDOC-CHANGERECORDUUID, sy-vline,
  WA_NCHGRCDOBJPGDOC-CHANGERECORDREFERENCETYPE, sy-vline,
  WA_NCHGRCDOBJPGDOC-CHANGERECORDREFERENCESUBTYPE, sy-vline,
  WA_NCHGRCDOBJPGDOC-CHANGERECORDREFERENCE, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_NCHGRCDOBJPGDOC 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_NCHGRCDOBJPGDOC 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_NCHGRCDOBJPGDOC INTO WA_NCHGRCDOBJPGDOC.


*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 DOCUMENTINFORECORD
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_NCHGRCDOBJPGDOC-DOCUMENTINFORECORD
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_NCHGRCDOBJPGDOC-DOCUMENTINFORECORD.
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_NCHGRCDOBJPGDOC_STR, 
MANDT TYPE STRING,
CHANGERECORDREFERENCEUUID TYPE STRING,
DOCUMENTINFORECORD TYPE STRING,
DOCUMENTTYPE TYPE STRING,
DOCUMENTPART TYPE STRING,
DOCUMENTVERSION TYPE STRING,
CHANGERECORDTYPE TYPE STRING,
CHANGERECORDUUID TYPE STRING,
CHANGERECORDREFERENCETYPE TYPE STRING,
CHANGERECORDREFERENCESUBTYPE TYPE STRING,
CHANGERECORDREFERENCE TYPE STRING,
PARENTCHANGERECORDREFUUID TYPE STRING,
ISMAINREFERENCE TYPE STRING,
CREATEDBYUSER TYPE STRING,
CREATIONDATETIME TYPE STRING,
EXTERNALDOCUMENTSTATUS TYPE STRING,
DOCUMENTSTATUSNAME TYPE STRING,
DOCUMENTDESCRIPTION TYPE STRING,
CHANGERECORDITEMRELEVANCE TYPE STRING,END OF T_EKKO_STR.
DATA: WA_NCHGRCDOBJPGDOC_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_NCHGRCDOBJPGDOC_STR-MANDT sy-vline 
WA_NCHGRCDOBJPGDOC_STR-CHANGERECORDREFERENCEUUID sy-vline 
WA_NCHGRCDOBJPGDOC_STR-DOCUMENTINFORECORD sy-vline 
WA_NCHGRCDOBJPGDOC_STR-DOCUMENTTYPE sy-vline 
WA_NCHGRCDOBJPGDOC_STR-DOCUMENTPART sy-vline 
WA_NCHGRCDOBJPGDOC_STR-DOCUMENTVERSION sy-vline 
WA_NCHGRCDOBJPGDOC_STR-CHANGERECORDTYPE sy-vline 
WA_NCHGRCDOBJPGDOC_STR-CHANGERECORDUUID sy-vline 
WA_NCHGRCDOBJPGDOC_STR-CHANGERECORDREFERENCETYPE sy-vline 
WA_NCHGRCDOBJPGDOC_STR-CHANGERECORDREFERENCESUBTYPE sy-vline 
WA_NCHGRCDOBJPGDOC_STR-CHANGERECORDREFERENCE sy-vline 
WA_NCHGRCDOBJPGDOC_STR-PARENTCHANGERECORDREFUUID sy-vline 
WA_NCHGRCDOBJPGDOC_STR-ISMAINREFERENCE sy-vline 
WA_NCHGRCDOBJPGDOC_STR-CREATEDBYUSER sy-vline 
WA_NCHGRCDOBJPGDOC_STR-CREATIONDATETIME sy-vline 
WA_NCHGRCDOBJPGDOC_STR-EXTERNALDOCUMENTSTATUS sy-vline 
WA_NCHGRCDOBJPGDOC_STR-DOCUMENTSTATUSNAME sy-vline 
WA_NCHGRCDOBJPGDOC_STR-DOCUMENTDESCRIPTION sy-vline 
WA_NCHGRCDOBJPGDOC_STR-CHANGERECORDITEMRELEVANCE sy-vline      INTO ld_text SEPARATED BY SPACE.

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