ABAP Select data from SAP table ICHGRECREFDOCTP into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM ICHGRECREFDOCTP
*  INTO TABLE @DATA(IT_ICHGRECREFDOCTP2).
*--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_ICHGRECREFDOCTP INDEX 1 INTO DATA(WA_ICHGRECREFDOCTP2).


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

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

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_ICHGRECREFDOCTP-DOCUMENTPART, sy-vline,
  WA_ICHGRECREFDOCTP-CHANGERECORDUUID, sy-vline,
  WA_ICHGRECREFDOCTP-CHANGERECORDREFERENCETYPE, sy-vline,
  WA_ICHGRECREFDOCTP-CHANGERECORDREFERENCESUBTYPE, sy-vline,
  WA_ICHGRECREFDOCTP-CHANGERECORDREFERENCE, sy-vline,
  WA_ICHGRECREFDOCTP-PARENTCHANGERECORDREFUUID, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_ICHGRECREFDOCTP 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_ICHGRECREFDOCTP 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_ICHGRECREFDOCTP INTO WA_ICHGRECREFDOCTP.


*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_ICHGRECREFDOCTP-DOCUMENTINFORECORD
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ICHGRECREFDOCTP-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_ICHGRECREFDOCTP_STR, 
MANDT TYPE STRING,
CHANGERECORDREFERENCEUUID TYPE STRING,
DOCUMENTTYPE TYPE STRING,
DOCUMENTINFORECORD TYPE STRING,
DOCUMENTVERSION TYPE STRING,
DOCUMENTPART 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,
LASTCHANGEDBYUSER TYPE STRING,
LASTCHANGEDATETIME TYPE STRING,
CHANGERECORDITEMRELEVANCE TYPE STRING,
CHANGERECORDVIRTUALREFIND TYPE STRING,END OF T_EKKO_STR.
DATA: WA_ICHGRECREFDOCTP_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_ICHGRECREFDOCTP_STR-MANDT sy-vline 
WA_ICHGRECREFDOCTP_STR-CHANGERECORDREFERENCEUUID sy-vline 
WA_ICHGRECREFDOCTP_STR-DOCUMENTTYPE sy-vline 
WA_ICHGRECREFDOCTP_STR-DOCUMENTINFORECORD sy-vline 
WA_ICHGRECREFDOCTP_STR-DOCUMENTVERSION sy-vline 
WA_ICHGRECREFDOCTP_STR-DOCUMENTPART sy-vline 
WA_ICHGRECREFDOCTP_STR-CHANGERECORDUUID sy-vline 
WA_ICHGRECREFDOCTP_STR-CHANGERECORDREFERENCETYPE sy-vline 
WA_ICHGRECREFDOCTP_STR-CHANGERECORDREFERENCESUBTYPE sy-vline 
WA_ICHGRECREFDOCTP_STR-CHANGERECORDREFERENCE sy-vline 
WA_ICHGRECREFDOCTP_STR-PARENTCHANGERECORDREFUUID sy-vline 
WA_ICHGRECREFDOCTP_STR-ISMAINREFERENCE sy-vline 
WA_ICHGRECREFDOCTP_STR-CREATEDBYUSER sy-vline 
WA_ICHGRECREFDOCTP_STR-CREATIONDATETIME sy-vline 
WA_ICHGRECREFDOCTP_STR-LASTCHANGEDBYUSER sy-vline 
WA_ICHGRECREFDOCTP_STR-LASTCHANGEDATETIME sy-vline 
WA_ICHGRECREFDOCTP_STR-CHANGERECORDITEMRELEVANCE sy-vline 
WA_ICHGRECREFDOCTP_STR-CHANGERECORDVIRTUALREFIND sy-vline      INTO ld_text SEPARATED BY SPACE.

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