ABAP Select data from SAP table IGHOFCRESNTLVL into internal table

Get Example source ABAP code based on a different SAP table
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Below is a number of ABAP code snippets to demonstrate how to select data from SAP IGHOFCRESNTLVL 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 IGHOFCRESNTLVL. 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 IGHOFCRESNTLVL 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_IGHOFCRESNTLVL TYPE STANDARD TABLE OF IGHOFCRESNTLVL,
      WA_IGHOFCRESNTLVL TYPE IGHOFCRESNTLVL,
      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: <IGHOFCRESNTLVL> TYPE IGHOFCRESNTLVL.

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM IGHOFCRESNTLVL
*  INTO TABLE @DATA(IT_IGHOFCRESNTLVL2).
*--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_IGHOFCRESNTLVL INDEX 1 INTO DATA(WA_IGHOFCRESNTLVL2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<IGHOFCRESNTLVL>-MANDT = 1.
<IGHOFCRESNTLVL>-NETWORKOBJECTID = 1.
<IGHOFCRESNTLVL>-NETWORKOBJECTNAME = 1.
<IGHOFCRESNTLVL>-NETWORKMEDIUM = 1.
<IGHOFCRESNTLVL>-FORECASTRESULTTYPE = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_IGHOFCRESNTLVL-ALLOCATIONFREQUENCYCODE, sy-vline,
  WA_IGHOFCRESNTLVL-FORECASTRESULTDATE, sy-vline,
  WA_IGHOFCRESNTLVL-FORECASTRESULTVALUE, sy-vline,
  WA_IGHOFCRESNTLVL-DOWNSTREAMFORECASTRESULTVALUE, sy-vline,
  WA_IGHOFCRESNTLVL-UPSTREAMPROJECTID, sy-vline,
  WA_IGHOFCRESNTLVL-PROJECTNAME, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_IGHOFCRESNTLVL 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_IGHOFCRESNTLVL 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_IGHOFCRESNTLVL INTO WA_IGHOFCRESNTLVL.


*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 GHONO, internal->external for field NETWORKOBJECTNAME
CALL FUNCTION 'CONVERSION_EXIT_GHONO_OUTPUT'
  EXPORTING
    input =                      WA_IGHOFCRESNTLVL-NETWORKOBJECTNAME
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_IGHOFCRESNTLVL-NETWORKOBJECTNAME.
WRITE:/ 'New Value:', ld_input.

*Conversion exit GHOFC, internal->external for field PRODUCTIONNETWORKNAME
CALL FUNCTION 'CONVERSION_EXIT_GHOFC_OUTPUT'
  EXPORTING
    input =                      WA_IGHOFCRESNTLVL-PRODUCTIONNETWORKNAME
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_IGHOFCRESNTLVL-PRODUCTIONNETWORKNAME.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field UNITOFMEASURE
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_IGHOFCRESNTLVL-UNITOFMEASURE
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_IGHOFCRESNTLVL-UNITOFMEASURE.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ABPSP, internal->external for field WBSELEMENT
CALL FUNCTION 'CONVERSION_EXIT_ABPSP_OUTPUT'
  EXPORTING
    input =                      WA_IGHOFCRESNTLVL-WBSELEMENT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_IGHOFCRESNTLVL-WBSELEMENT.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field COSTCENTER
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_IGHOFCRESNTLVL-COSTCENTER
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_IGHOFCRESNTLVL-COSTCENTER.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field PROFITCENTER
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_IGHOFCRESNTLVL-PROFITCENTER
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_IGHOFCRESNTLVL-PROFITCENTER.
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_IGHOFCRESNTLVL_STR, 
MANDT TYPE STRING,
NETWORKOBJECTID TYPE STRING,
NETWORKOBJECTNAME TYPE STRING,
NETWORKMEDIUM TYPE STRING,
FORECASTRESULTTYPE TYPE STRING,
ALLOCATIONFREQUENCYCODE TYPE STRING,
FORECASTRESULTDATE TYPE STRING,
FORECASTRESULTVALUE TYPE STRING,
DOWNSTREAMFORECASTRESULTVALUE TYPE STRING,
UPSTREAMPROJECTID TYPE STRING,
PROJECTNAME TYPE STRING,
PROJECTDESCRIPTION TYPE STRING,
UPSTREAMPROJEFFCTVDATETO TYPE STRING,
UPSTREAMPROJEFFCTVDATEFROM TYPE STRING,
UPSTREAMPROJSTATUSOBJECT TYPE STRING,
SCENARIOID TYPE STRING,
SCENARIONAME TYPE STRING,
SCENARIODESCRIPTION TYPE STRING,
SCENARIOSTATE TYPE STRING,
PRODUCTIONNETWORKID TYPE STRING,
PRODUCTIONNETWORKDESCRIPTION TYPE STRING,
PRODUCTIONNETWORKNAME TYPE STRING,
NETWORKOBJECTTYPE TYPE STRING,
NETWORKOBJECTDESCRIPTION TYPE STRING,
NETWORKOBJECTEFFECTIVEDATEFROM TYPE STRING,
NETWORKOBJECTEFFECTIVEDATETO TYPE STRING,
FORECASTTYPE TYPE STRING,
FORECASTTYPEDESCRIPTION TYPE STRING,
FORECASTDATE TYPE STRING,
DISPLAYTIMEZONE TYPE STRING,
NETWORKCHAINSOURCEFLAG TYPE STRING,
UNITOFMEASURE TYPE STRING,
WBSELEMENT TYPE STRING,
COSTCENTER TYPE STRING,
PROFITCENTER TYPE STRING,
STATUSOBJECTNUMBER TYPE STRING,
USERSTATUSPROFILE TYPE STRING,
NETWORKMEDIUMDESCRIPTION TYPE STRING,
CALENDARDATE TYPE STRING,
CALENDARYEAR TYPE STRING,
CALENDARMONTH TYPE STRING,
CALENDARDAY TYPE STRING,
UPSTREAMPROJECTSTATUS TYPE STRING,
PROJECTSCENARIONAME TYPE STRING,
OBJECTTYPE TYPE STRING,
EXTERNALFORECASTRESULTTYPE TYPE STRING,
OBJECTORDERNUMBER TYPE STRING,
OBJECTSTATUS TYPE STRING,
OBJECTINDICATOR TYPE STRING,
SYSTEMSTATUS TYPE STRING,
CALENDARMONTHSHORTNAME TYPE STRING,END OF T_EKKO_STR.
DATA: WA_IGHOFCRESNTLVL_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_IGHOFCRESNTLVL_STR-MANDT sy-vline 
WA_IGHOFCRESNTLVL_STR-NETWORKOBJECTID sy-vline 
WA_IGHOFCRESNTLVL_STR-NETWORKOBJECTNAME sy-vline 
WA_IGHOFCRESNTLVL_STR-NETWORKMEDIUM sy-vline 
WA_IGHOFCRESNTLVL_STR-FORECASTRESULTTYPE sy-vline 
WA_IGHOFCRESNTLVL_STR-ALLOCATIONFREQUENCYCODE sy-vline 
WA_IGHOFCRESNTLVL_STR-FORECASTRESULTDATE sy-vline 
WA_IGHOFCRESNTLVL_STR-FORECASTRESULTVALUE sy-vline 
WA_IGHOFCRESNTLVL_STR-DOWNSTREAMFORECASTRESULTVALUE sy-vline 
WA_IGHOFCRESNTLVL_STR-UPSTREAMPROJECTID sy-vline 
WA_IGHOFCRESNTLVL_STR-PROJECTNAME sy-vline 
WA_IGHOFCRESNTLVL_STR-PROJECTDESCRIPTION sy-vline 
WA_IGHOFCRESNTLVL_STR-UPSTREAMPROJEFFCTVDATETO sy-vline 
WA_IGHOFCRESNTLVL_STR-UPSTREAMPROJEFFCTVDATEFROM sy-vline 
WA_IGHOFCRESNTLVL_STR-UPSTREAMPROJSTATUSOBJECT sy-vline 
WA_IGHOFCRESNTLVL_STR-SCENARIOID sy-vline 
WA_IGHOFCRESNTLVL_STR-SCENARIONAME sy-vline 
WA_IGHOFCRESNTLVL_STR-SCENARIODESCRIPTION sy-vline 
WA_IGHOFCRESNTLVL_STR-SCENARIOSTATE sy-vline 
WA_IGHOFCRESNTLVL_STR-PRODUCTIONNETWORKID sy-vline 
WA_IGHOFCRESNTLVL_STR-PRODUCTIONNETWORKDESCRIPTION sy-vline 
WA_IGHOFCRESNTLVL_STR-PRODUCTIONNETWORKNAME sy-vline 
WA_IGHOFCRESNTLVL_STR-NETWORKOBJECTTYPE sy-vline 
WA_IGHOFCRESNTLVL_STR-NETWORKOBJECTDESCRIPTION sy-vline 
WA_IGHOFCRESNTLVL_STR-NETWORKOBJECTEFFECTIVEDATEFROM sy-vline 
WA_IGHOFCRESNTLVL_STR-NETWORKOBJECTEFFECTIVEDATETO sy-vline 
WA_IGHOFCRESNTLVL_STR-FORECASTTYPE sy-vline 
WA_IGHOFCRESNTLVL_STR-FORECASTTYPEDESCRIPTION sy-vline 
WA_IGHOFCRESNTLVL_STR-FORECASTDATE sy-vline 
WA_IGHOFCRESNTLVL_STR-DISPLAYTIMEZONE sy-vline 
WA_IGHOFCRESNTLVL_STR-NETWORKCHAINSOURCEFLAG sy-vline 
WA_IGHOFCRESNTLVL_STR-UNITOFMEASURE sy-vline 
WA_IGHOFCRESNTLVL_STR-WBSELEMENT sy-vline 
WA_IGHOFCRESNTLVL_STR-COSTCENTER sy-vline 
WA_IGHOFCRESNTLVL_STR-PROFITCENTER sy-vline 
WA_IGHOFCRESNTLVL_STR-STATUSOBJECTNUMBER sy-vline 
WA_IGHOFCRESNTLVL_STR-USERSTATUSPROFILE sy-vline 
WA_IGHOFCRESNTLVL_STR-NETWORKMEDIUMDESCRIPTION sy-vline 
WA_IGHOFCRESNTLVL_STR-CALENDARDATE sy-vline 
WA_IGHOFCRESNTLVL_STR-CALENDARYEAR sy-vline 
WA_IGHOFCRESNTLVL_STR-CALENDARMONTH sy-vline 
WA_IGHOFCRESNTLVL_STR-CALENDARDAY sy-vline 
WA_IGHOFCRESNTLVL_STR-UPSTREAMPROJECTSTATUS sy-vline 
WA_IGHOFCRESNTLVL_STR-PROJECTSCENARIONAME sy-vline 
WA_IGHOFCRESNTLVL_STR-OBJECTTYPE sy-vline 
WA_IGHOFCRESNTLVL_STR-EXTERNALFORECASTRESULTTYPE sy-vline 
WA_IGHOFCRESNTLVL_STR-OBJECTORDERNUMBER sy-vline 
WA_IGHOFCRESNTLVL_STR-OBJECTSTATUS sy-vline 
WA_IGHOFCRESNTLVL_STR-OBJECTINDICATOR sy-vline 
WA_IGHOFCRESNTLVL_STR-SYSTEMSTATUS sy-vline 
WA_IGHOFCRESNTLVL_STR-CALENDARMONTHSHORTNAME sy-vline      INTO ld_text SEPARATED BY SPACE.

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