ABAP Select data from SAP table IGHOFCRESVH into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM IGHOFCRESVH
*  INTO TABLE @DATA(IT_IGHOFCRESVH2).
*--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_IGHOFCRESVH INDEX 1 INTO DATA(WA_IGHOFCRESVH2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<IGHOFCRESVH>-MANDT = 1.
<IGHOFCRESVH>-NETWORKOBJECTID = 1.
<IGHOFCRESVH>-STARTDATE = 1.
<IGHOFCRESVH>-ENDDATE = 1.
<IGHOFCRESVH>-PRODUCTIONNETWORKNAME = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_IGHOFCRESVH-NETWORKOBJECTTYPE, sy-vline,
  WA_IGHOFCRESVH-NETWORKOBJECTTYPEDESCRIPTION, sy-vline,
  WA_IGHOFCRESVH-FORECASTRESULTTYPEDESCRIPTION, sy-vline,
  WA_IGHOFCRESVH-OBJECTTYPE, sy-vline,
  WA_IGHOFCRESVH-EXTERNALFORECASTRESULTTYPE, sy-vline,
  WA_IGHOFCRESVH-NETWORKMEDIUM, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_IGHOFCRESVH 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_IGHOFCRESVH 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_IGHOFCRESVH INTO WA_IGHOFCRESVH.


*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 GHOFC, internal->external for field PRODUCTIONNETWORKNAME
CALL FUNCTION 'CONVERSION_EXIT_GHOFC_OUTPUT'
  EXPORTING
    input =                      WA_IGHOFCRESVH-PRODUCTIONNETWORKNAME
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_IGHOFCRESVH-PRODUCTIONNETWORKNAME.
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_IGHOFCRESVH_STR, 
MANDT TYPE STRING,
NETWORKOBJECTID TYPE STRING,
STARTDATE TYPE STRING,
ENDDATE TYPE STRING,
PRODUCTIONNETWORKNAME TYPE STRING,
NETWORKOBJECTTYPE TYPE STRING,
NETWORKOBJECTTYPEDESCRIPTION TYPE STRING,
FORECASTRESULTTYPEDESCRIPTION TYPE STRING,
OBJECTTYPE TYPE STRING,
EXTERNALFORECASTRESULTTYPE TYPE STRING,
NETWORKMEDIUM TYPE STRING,
PROJECTNAME TYPE STRING,
SCENARIONAME TYPE STRING,
PROJECTSCENARIOEXTERNALNAME TYPE STRING,END OF T_EKKO_STR.
DATA: WA_IGHOFCRESVH_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_IGHOFCRESVH_STR-MANDT sy-vline 
WA_IGHOFCRESVH_STR-NETWORKOBJECTID sy-vline 
WA_IGHOFCRESVH_STR-STARTDATE sy-vline 
WA_IGHOFCRESVH_STR-ENDDATE sy-vline 
WA_IGHOFCRESVH_STR-PRODUCTIONNETWORKNAME sy-vline 
WA_IGHOFCRESVH_STR-NETWORKOBJECTTYPE sy-vline 
WA_IGHOFCRESVH_STR-NETWORKOBJECTTYPEDESCRIPTION sy-vline 
WA_IGHOFCRESVH_STR-FORECASTRESULTTYPEDESCRIPTION sy-vline 
WA_IGHOFCRESVH_STR-OBJECTTYPE sy-vline 
WA_IGHOFCRESVH_STR-EXTERNALFORECASTRESULTTYPE sy-vline 
WA_IGHOFCRESVH_STR-NETWORKMEDIUM sy-vline 
WA_IGHOFCRESVH_STR-PROJECTNAME sy-vline 
WA_IGHOFCRESVH_STR-SCENARIONAME sy-vline 
WA_IGHOFCRESVH_STR-PROJECTSCENARIOEXTERNALNAME sy-vline      INTO ld_text SEPARATED BY SPACE.

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