ABAP Select data from SAP table IMFGREFNODERLN 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 IMFGREFNODERLN 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 IMFGREFNODERLN. 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 IMFGREFNODERLN 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_IMFGREFNODERLN TYPE STANDARD TABLE OF IMFGREFNODERLN,
      WA_IMFGREFNODERLN TYPE IMFGREFNODERLN,
      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: <IMFGREFNODERLN> TYPE IMFGREFNODERLN.

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM IMFGREFNODERLN
*  INTO TABLE @DATA(IT_IMFGREFNODERLN2).
*--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_IMFGREFNODERLN INDEX 1 INTO DATA(WA_IMFGREFNODERLN2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<IMFGREFNODERLN>-MANDT = 1.
<IMFGREFNODERLN>-MFGREFSTRUCTUREUSAGE = 1.
<IMFGREFNODERLN>-MFGREFSTRUCITEMOBJECT = 1.
<IMFGREFNODERLN>-MFGREFSTRUCITMREFDESIGNATOR = 1.
<IMFGREFNODERLN>-MFGREFSTRUCHEADEROBJECT = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_IMFGREFNODERLN-MFGREFOBJECTGROUP, sy-vline,
  WA_IMFGREFNODERLN-MFGREFSTRUCITEMSORTPOSITIONVAL, sy-vline,
  WA_IMFGREFNODERLN-ISOBSOLETE, sy-vline,
  WA_IMFGREFNODERLN-MFGREFSTRUCITMREFDSGNTRNAME, sy-vline,
  WA_IMFGREFNODERLN-MFGREFSTRUCTUREITEMEXTERNALID, sy-vline,
  WA_IMFGREFNODERLN-MFGREFOBJECTGROUPDESC, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_IMFGREFNODERLN 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_IMFGREFNODERLN 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_IMFGREFNODERLN INTO WA_IMFGREFNODERLN.


*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.
ENDFORM. 

*&---------------------------------------------------------------------*
*& Form process_as_string_field_values
*&---------------------------------------------------------------------*
FORM process_as_string_field_values CHANGING p_EKKO LIKE wa_EKKO.

TYPES: BEGIN OF T_IMFGREFNODERLN_STR, 
MANDT TYPE STRING,
MFGREFSTRUCTUREUSAGE TYPE STRING,
MFGREFSTRUCITEMOBJECT TYPE STRING,
MFGREFSTRUCITMREFDESIGNATOR TYPE STRING,
MFGREFSTRUCHEADEROBJECT TYPE STRING,
MFGREFOBJECTGROUP TYPE STRING,
MFGREFSTRUCITEMSORTPOSITIONVAL TYPE STRING,
ISOBSOLETE TYPE STRING,
MFGREFSTRUCITMREFDSGNTRNAME TYPE STRING,
MFGREFSTRUCTUREITEMEXTERNALID TYPE STRING,
MFGREFOBJECTGROUPDESC TYPE STRING,
MFGREFSTRUCTUREUSAGEDESC TYPE STRING,
MFGREFSTRUCITMREFDSGNTRDESC TYPE STRING,
MFGREFOBJECTDESC TYPE STRING,
MFGREFOBJECTISROOT TYPE STRING,END OF T_EKKO_STR.
DATA: WA_IMFGREFNODERLN_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_IMFGREFNODERLN_STR-MANDT sy-vline 
WA_IMFGREFNODERLN_STR-MFGREFSTRUCTUREUSAGE sy-vline 
WA_IMFGREFNODERLN_STR-MFGREFSTRUCITEMOBJECT sy-vline 
WA_IMFGREFNODERLN_STR-MFGREFSTRUCITMREFDESIGNATOR sy-vline 
WA_IMFGREFNODERLN_STR-MFGREFSTRUCHEADEROBJECT sy-vline 
WA_IMFGREFNODERLN_STR-MFGREFOBJECTGROUP sy-vline 
WA_IMFGREFNODERLN_STR-MFGREFSTRUCITEMSORTPOSITIONVAL sy-vline 
WA_IMFGREFNODERLN_STR-ISOBSOLETE sy-vline 
WA_IMFGREFNODERLN_STR-MFGREFSTRUCITMREFDSGNTRNAME sy-vline 
WA_IMFGREFNODERLN_STR-MFGREFSTRUCTUREITEMEXTERNALID sy-vline 
WA_IMFGREFNODERLN_STR-MFGREFOBJECTGROUPDESC sy-vline 
WA_IMFGREFNODERLN_STR-MFGREFSTRUCTUREUSAGEDESC sy-vline 
WA_IMFGREFNODERLN_STR-MFGREFSTRUCITMREFDSGNTRDESC sy-vline 
WA_IMFGREFNODERLN_STR-MFGREFOBJECTDESC sy-vline 
WA_IMFGREFNODERLN_STR-MFGREFOBJECTISROOT sy-vline      INTO ld_text SEPARATED BY SPACE.

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