ABAP Select data from SAP table IGHONTWKOBJ into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM IGHONTWKOBJ
*  INTO TABLE @DATA(IT_IGHONTWKOBJ2).
*--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_IGHONTWKOBJ INDEX 1 INTO DATA(WA_IGHONTWKOBJ2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<IGHONTWKOBJ>-MANDT = 1.
<IGHONTWKOBJ>-PRODUCTIONNETWORKID = 1.
<IGHONTWKOBJ>-NETWORKINTERNALID = 1.
<IGHONTWKOBJ>-NETWORKOBJECTTYPE = 1.
<IGHONTWKOBJ>-SECONDARYGEOGRLLOCATION = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_IGHONTWKOBJ-SECONDARYGEOGRLLOCATIONNAME, sy-vline,
  WA_IGHONTWKOBJ-NETWORKTOBEALLOCATED, sy-vline,
  WA_IGHONTWKOBJ-NETWORKTIMEZONE, sy-vline,
  WA_IGHONTWKOBJ-REFERENCEWELL, sy-vline,
  WA_IGHONTWKOBJ-NTWKOBJECTISCHAINED, sy-vline,
  WA_IGHONTWKOBJ-DATAINTEGRATIONSYSTEMID, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_IGHONTWKOBJ 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_IGHONTWKOBJ 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_IGHONTWKOBJ INTO WA_IGHONTWKOBJ.


*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 TPLNR, internal->external for field PRODUCTIONNETWORKID
CALL FUNCTION 'CONVERSION_EXIT_TPLNR_OUTPUT'
  EXPORTING
    input =                      WA_IGHONTWKOBJ-PRODUCTIONNETWORKID
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_IGHONTWKOBJ-PRODUCTIONNETWORKID.
WRITE:/ 'New Value:', ld_input.

*Conversion exit TPLNR, internal->external for field REFERENCEWELL
CALL FUNCTION 'CONVERSION_EXIT_TPLNR_OUTPUT'
  EXPORTING
    input =                      WA_IGHONTWKOBJ-REFERENCEWELL
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_IGHONTWKOBJ-REFERENCEWELL.
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_IGHONTWKOBJ_STR, 
MANDT TYPE STRING,
PRODUCTIONNETWORKID TYPE STRING,
NETWORKINTERNALID TYPE STRING,
NETWORKOBJECTTYPE TYPE STRING,
SECONDARYGEOGRLLOCATION TYPE STRING,
SECONDARYGEOGRLLOCATIONNAME TYPE STRING,
NETWORKTOBEALLOCATED TYPE STRING,
NETWORKTIMEZONE TYPE STRING,
REFERENCEWELL TYPE STRING,
NTWKOBJECTISCHAINED TYPE STRING,
DATAINTEGRATIONSYSTEMID TYPE STRING,
ASSIGNEDTONETWORKINTERNALID TYPE STRING,
ALTERNATELABELINGSYSTEM TYPE STRING,
FUNCLOCATIONSTRUCTURE TYPE STRING,
MAINTENANCEPLANNERGROUP TYPE STRING,
MAINTENANCEPLANNINGPLANT TYPE STRING,
AUTHORIZATIONGROUP TYPE STRING,
MAINTOBJECTLOCACCTASSGMTNMBR TYPE STRING,END OF T_EKKO_STR.
DATA: WA_IGHONTWKOBJ_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_IGHONTWKOBJ_STR-MANDT sy-vline 
WA_IGHONTWKOBJ_STR-PRODUCTIONNETWORKID sy-vline 
WA_IGHONTWKOBJ_STR-NETWORKINTERNALID sy-vline 
WA_IGHONTWKOBJ_STR-NETWORKOBJECTTYPE sy-vline 
WA_IGHONTWKOBJ_STR-SECONDARYGEOGRLLOCATION sy-vline 
WA_IGHONTWKOBJ_STR-SECONDARYGEOGRLLOCATIONNAME sy-vline 
WA_IGHONTWKOBJ_STR-NETWORKTOBEALLOCATED sy-vline 
WA_IGHONTWKOBJ_STR-NETWORKTIMEZONE sy-vline 
WA_IGHONTWKOBJ_STR-REFERENCEWELL sy-vline 
WA_IGHONTWKOBJ_STR-NTWKOBJECTISCHAINED sy-vline 
WA_IGHONTWKOBJ_STR-DATAINTEGRATIONSYSTEMID sy-vline 
WA_IGHONTWKOBJ_STR-ASSIGNEDTONETWORKINTERNALID sy-vline 
WA_IGHONTWKOBJ_STR-ALTERNATELABELINGSYSTEM sy-vline 
WA_IGHONTWKOBJ_STR-FUNCLOCATIONSTRUCTURE sy-vline 
WA_IGHONTWKOBJ_STR-MAINTENANCEPLANNERGROUP sy-vline 
WA_IGHONTWKOBJ_STR-MAINTENANCEPLANNINGPLANT sy-vline 
WA_IGHONTWKOBJ_STR-AUTHORIZATIONGROUP sy-vline 
WA_IGHONTWKOBJ_STR-MAINTOBJECTLOCACCTASSGMTNMBR sy-vline      INTO ld_text SEPARATED BY SPACE.

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