ABAP Select data from SAP table CGHOFCRESNWLVL into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM CGHOFCRESNWLVL
*  INTO TABLE @DATA(IT_CGHOFCRESNWLVL2).
*--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_CGHOFCRESNWLVL INDEX 1 INTO DATA(WA_CGHOFCRESNWLVL2).


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

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

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_CGHOFCRESNWLVL-NETWORKOBJECTNAME, sy-vline,
  WA_CGHOFCRESNWLVL-NETWORKMEDIUM, sy-vline,
  WA_CGHOFCRESNWLVL-FORECASTRESULTTYPE, sy-vline,
  WA_CGHOFCRESNWLVL-ALLOCATIONFREQUENCYCODE, sy-vline,
  WA_CGHOFCRESNWLVL-FORECASTRESULTDATE, sy-vline,
  WA_CGHOFCRESNWLVL-FORECASTRESULTVALUE, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_CGHOFCRESNWLVL 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_CGHOFCRESNWLVL 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_CGHOFCRESNWLVL INTO WA_CGHOFCRESNWLVL.


*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_CGHOFCRESNWLVL-NETWORKOBJECTNAME
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_CGHOFCRESNWLVL-NETWORKOBJECTNAME.
WRITE:/ 'New Value:', ld_input.

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

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

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

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

*Conversion exit ALPHA, internal->external for field PROFITCENTER
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_CGHOFCRESNWLVL-PROFITCENTER
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_CGHOFCRESNWLVL-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_CGHOFCRESNWLVL_STR, 
MANDT TYPE STRING,
UPSTREAMPROJECTID TYPE STRING,
STARTDATE TYPE STRING,
ENDDATE 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,
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,
PROJECTSCENARIOEXTERNALNAME 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_CGHOFCRESNWLVL_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_CGHOFCRESNWLVL_STR-MANDT sy-vline 
WA_CGHOFCRESNWLVL_STR-UPSTREAMPROJECTID sy-vline 
WA_CGHOFCRESNWLVL_STR-STARTDATE sy-vline 
WA_CGHOFCRESNWLVL_STR-ENDDATE sy-vline 
WA_CGHOFCRESNWLVL_STR-NETWORKOBJECTID sy-vline 
WA_CGHOFCRESNWLVL_STR-NETWORKOBJECTNAME sy-vline 
WA_CGHOFCRESNWLVL_STR-NETWORKMEDIUM sy-vline 
WA_CGHOFCRESNWLVL_STR-FORECASTRESULTTYPE sy-vline 
WA_CGHOFCRESNWLVL_STR-ALLOCATIONFREQUENCYCODE sy-vline 
WA_CGHOFCRESNWLVL_STR-FORECASTRESULTDATE sy-vline 
WA_CGHOFCRESNWLVL_STR-FORECASTRESULTVALUE sy-vline 
WA_CGHOFCRESNWLVL_STR-DOWNSTREAMFORECASTRESULTVALUE sy-vline 
WA_CGHOFCRESNWLVL_STR-PROJECTNAME sy-vline 
WA_CGHOFCRESNWLVL_STR-PROJECTDESCRIPTION sy-vline 
WA_CGHOFCRESNWLVL_STR-UPSTREAMPROJEFFCTVDATETO sy-vline 
WA_CGHOFCRESNWLVL_STR-UPSTREAMPROJEFFCTVDATEFROM sy-vline 
WA_CGHOFCRESNWLVL_STR-UPSTREAMPROJSTATUSOBJECT sy-vline 
WA_CGHOFCRESNWLVL_STR-SCENARIOID sy-vline 
WA_CGHOFCRESNWLVL_STR-SCENARIONAME sy-vline 
WA_CGHOFCRESNWLVL_STR-SCENARIODESCRIPTION sy-vline 
WA_CGHOFCRESNWLVL_STR-SCENARIOSTATE sy-vline 
WA_CGHOFCRESNWLVL_STR-PRODUCTIONNETWORKID sy-vline 
WA_CGHOFCRESNWLVL_STR-PRODUCTIONNETWORKDESCRIPTION sy-vline 
WA_CGHOFCRESNWLVL_STR-PRODUCTIONNETWORKNAME sy-vline 
WA_CGHOFCRESNWLVL_STR-NETWORKOBJECTTYPE sy-vline 
WA_CGHOFCRESNWLVL_STR-NETWORKOBJECTDESCRIPTION sy-vline 
WA_CGHOFCRESNWLVL_STR-NETWORKOBJECTEFFECTIVEDATEFROM sy-vline 
WA_CGHOFCRESNWLVL_STR-NETWORKOBJECTEFFECTIVEDATETO sy-vline 
WA_CGHOFCRESNWLVL_STR-FORECASTTYPE sy-vline 
WA_CGHOFCRESNWLVL_STR-FORECASTTYPEDESCRIPTION sy-vline 
WA_CGHOFCRESNWLVL_STR-FORECASTDATE sy-vline 
WA_CGHOFCRESNWLVL_STR-DISPLAYTIMEZONE sy-vline 
WA_CGHOFCRESNWLVL_STR-NETWORKCHAINSOURCEFLAG sy-vline 
WA_CGHOFCRESNWLVL_STR-UNITOFMEASURE sy-vline 
WA_CGHOFCRESNWLVL_STR-WBSELEMENT sy-vline 
WA_CGHOFCRESNWLVL_STR-COSTCENTER sy-vline 
WA_CGHOFCRESNWLVL_STR-PROFITCENTER sy-vline 
WA_CGHOFCRESNWLVL_STR-STATUSOBJECTNUMBER sy-vline 
WA_CGHOFCRESNWLVL_STR-USERSTATUSPROFILE sy-vline 
WA_CGHOFCRESNWLVL_STR-NETWORKMEDIUMDESCRIPTION sy-vline 
WA_CGHOFCRESNWLVL_STR-CALENDARDATE sy-vline 
WA_CGHOFCRESNWLVL_STR-CALENDARYEAR sy-vline 
WA_CGHOFCRESNWLVL_STR-CALENDARMONTH sy-vline 
WA_CGHOFCRESNWLVL_STR-CALENDARDAY sy-vline 
WA_CGHOFCRESNWLVL_STR-UPSTREAMPROJECTSTATUS sy-vline 
WA_CGHOFCRESNWLVL_STR-PROJECTSCENARIOEXTERNALNAME sy-vline 
WA_CGHOFCRESNWLVL_STR-OBJECTTYPE sy-vline 
WA_CGHOFCRESNWLVL_STR-EXTERNALFORECASTRESULTTYPE sy-vline 
WA_CGHOFCRESNWLVL_STR-OBJECTORDERNUMBER sy-vline 
WA_CGHOFCRESNWLVL_STR-OBJECTSTATUS sy-vline 
WA_CGHOFCRESNWLVL_STR-OBJECTINDICATOR sy-vline 
WA_CGHOFCRESNWLVL_STR-SYSTEMSTATUS sy-vline 
WA_CGHOFCRESNWLVL_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.